I'm not using it for the track or anything like that, I just want a fast street truck, I'm running a . It is otherwise stock except for the previous owner having milled the heads to get a ~9. Oct 16, 2021 · It should at least start. You can buy the reluctor wheel from GM for about $40 compared to a couple hundred for the 350. Joined Apr 21, 2018 Messages Dec 22, 2023 · The L29 454 heads have a lot of sharp ridges that would lead to detonation, especially with any carbon buildup. You dont buy a 454 truck for gas mileage, you Mar 9, 2012 · 96+ Vortec Performance + Computer Swaps. I got a L29 454 from a 2000 Express van from a junk yard for 800 Dollars. I was wondering has anyone tried to do the 411pcm swap on the l29 454 with the black box pcm. I measured the combustion chambers at 100cc. 4l60 segment swapped but trans is manual control and no vss. 480" on a 115 LSA but retarded some. Runs great currently but looking for more economy and power. 1999 K2500 Suburban L29 7. Using a card style MAF and all other stock sensors. Your stock fuel injectors are much larger than 19. The scan tool needs to have a set procedure program in it. 1/L18) upper half of the cover in conjunction with the 8100's cam gear and cam sensor, L29/L21 crank sprocket, and the L21's tone wheel and pickup sensor. Evansville, IN. I will be doing a 0411 PCM swap. There is also more support from the tuning software companies Aug 1, 2008 · Hopping The L29 454. 5 necessities. I still have terrible cough sputter and stumble until launching over 4000rpm. I recently picked up a second hand gen VI 454 HO for a bargain. 2010 DODGE RAM 2500 6. 7:1 compression ratio. I'm not sure how much timing could be added across Jan 14, 2018 · Incidentally, that 58x timing set from GMPP was originally designed by EFI Connection as hybrid between the Gen-VI (454/L29/L21) lower half of the cover and the Gen-VII (8. 4 vortec is a hard start cond Apr 14, 2024 · L29 454 : Modernized Big Block. Jump to page: Results 1 to 20 of 32 Thread: 2000 k3500 l29 454, nv4500. Chevy techs recommend loctite, my Gen 6 engine building book says pipe dope. , 0411PCM, COS3,4675LBS w/me in it. 1L does not need more than about 22* total timing to make its peak power and the 8. I'm hoping that's enough to get started on the cold start. 4-liter 454-cubic inch V8 big block, which produced 230 horsepower. I plan on doing a full rebuild to it and my goal is 400 plus horsepower. Dec 5, 2023 · 99 L29 454 build. ^^^^^ May 14, 2023 · Since your truck is a 99 HPTuners does support the factory black box, however from a tunability stand point you'll be able make leaps and bounds worth of tuning adjustments with the 0411. Runs great. 0%. I'm seriously considering purchasing a L29 equipped pickup and swapping engines, as I have found a few decently priced without a million miles on them. 7L Vortec heads were the "hot tip" for small-blocks. 4:1. Make sure the injector data is proper and work on the tune while it is fully warmed up since the cold stuff is just adders on top of that anyway. 25” stroke) 2. I worked on the heads for a couple months. I've been researching all the other build plans and results already to get me started. Preferably over 450 hp. The only time manifold pressure approaches atmospheric is at wot when air flows in with minimum restriction. breaks up like a rev limiter cause it screams to 5k but won't exceed it. Jeff. I have now disassembled the entire engine (except the crank and pistons) to check that everything looks good, remove all the dirt and grease and to prepare it for a rebuild. My questions are, which has the most tuning info available, and will either one be better for my 454/0411 Oct 3, 2011 · My plan is to rely on a tuner that I know and trust- Lyndon out of Wester's Garage in Canada. Oct 25, 2014 · The 1996-2000 L29 Vortec 454 7. If you have deep pockets, get a P400 6. I spent a year building a 7. The 0411 PCM has a much faster processor than the Black Box PCM and has dual timing tables. Ive done one on a 1998 l31 350 but they did not offer the 454 in the express van. 2013 Sonic RS Manual - 1. thanks for any help. Add a genuine K&N Fuel Filter and we will ship together with your injectors. Honestly I thought the weakest link in the vortec motors was that stupid distributor cap. Using E38 ECM with LS7 tune and after bumping cranking airflow and idle airflow and bumping spark to 16 from 13, it starts and idles reasonably well at 900 rpm. 4 (L29) 4L80E. I was just wondering if you can just change the cylinder The Vortec 7400 L29 7. Engine is a 99 Chevy Suburban, K2500, 454 (L-29) and I have a consistent problem with at cruise, LTFT's are at 18% rich. Applications: 1998-2000 GM/Workhorse P32 with 7. 5. 3 (LM7) 4L60E. 96 2ws Dually. This thing seems like it should make big power with the right cam and intake. I have a couple sets of std TRW pistons and was thinking of taking a shortblock throwing some 10-1's in it, running a 502/502 cam, a set of #781 heads ( 65-90 heads will bolt right on with stock gaskts), edelbrock RPM intake with an 800Dp carb. The stock IFR (injector flow rate is 2. ). If "500 HP is plenty", and you're starting with a 454 and maybe going to a 496, aluminum heads, aftermarket cam, etc. 98 GMC RCSB 2WD, Internally stock 305 w/Twin T-3 junkyard Turbos,4L80e,Ramjet intake,42lb. 2002 Chevy TrailBlazer LT 4X4 Summit White - 4. I recently rebuilt the top end of my personal pickup's 454 (L29) and had a mail order tune done but something is off. 7 CUMMINS. It always runs rich, unless I run a nice dose of E85 (40% or so) and BLM/LTFT come down to 0%. I want to swap the stock cam for another hydraulic roller that will make ~500hp (6000rpm max) while maintaining enough vacuum to run power brakes and power steering. 4L L29 motor and want to run the mods past you guys for recommendations. Silver 2003 C5 roadster, M6, Euro red/amber tails, Z06 Ti mufflers, Z06 2 cat H-pipe, Z06 airbox, and HPTuners s/w - available to any Corvette or other GM vehicle in Calgary, and also for Ford and Dodge products, including Cummins. Stock 454 cam isn't bad, I think it was 208/208 . March 17th, 2014 #4. But most of the time I get around 14 degrees timing at best on the stock timing map. Or contact comp, howards etc and Ask for a recomendation and what will work with stock ecu. I get around 13. Jan 3, 2022 · I swapped in an 0411 ecu into my 99 k2500. In ’79, GM got rid of the 454 option in the half-ton trucks but continued using it for heavy-duty truck May 3, 2024 · Scottm said: Extreme, the pressure in the manifold is almost always less than ambient. 02-11-2014 #3. Then you can tune with efilive, hptuners etc. Tell the dealer to do it like it is an '02 Express van with an 8. Intake, Injectors and ECM are all stock (black box). Engine coolant temps over 98C and it starts to pull timing back. no use in mpg with a 454 IMO. Ratio 9. It required more fuel in the tune so it makes more power. 2L I6 P10, lifted, wheels, etc. Last edited by Shnraines; 10-16-2021 at 01:11 PM . Shared L29(454) tunes. As far as potential issues go, I only had struggles with my swap because of some mistakes I made during the repining process as well as a few previously Sep 24, 2021 · Its time for a fresh build. Rumors are it takes around 4 hours to do. Sell your '99 and find a nice '94-'99 6. Introduced in 1996, it was produced for five years, until replaced by the Vortec 8100. 804 grams/sec or 22. So we've swapped 0411 for black box. New cam, headers and a Vortech Superchargers ! Just needs tuning! | supercharger Jan 20, 2016 · -Tuning and such as: Do a 0411 swap and you can have a local tuner work on it. I have a 2000 OBS Chevy quad cab with a 454 Vortec. 454 L29 Specs: Gas-STD (L29) 454 CID (7. 4) 290 hp @ 4000 rpm Torque 410 @3200 rpm Sequential-Port Fuel Injection Comp. Small comp cam, i believe 218-224. 73 motive gear into the open carrier (and didn’t change the speedo gear), but with the Feb 16, 2024 · In tuning news, I got it back from Black Bear after the 3rd adjustment. They look to be a good starting point. It has headers. Nov 13, 2014. My 8. Dec 19, 2023 #259 S. 617 g/sec or 28. 2 at 58. Now I have the injectors data from the black box. Apr 5, 2024 · Most of the 8-lug GM trucks have a similar PE fuel delay and some are up to a minute delay. There is a lot of good info in this one, and if you guys hav 2000 L29 454 Whipple Supercharger Tune. Best, 15. Dec 1, 2018 · 8. Nov 26, 2019 · hey all, my name is Blake, and I have a 1984 Monte Carlo ss with a targetmaster 2pc rms 350 that was installed in 1986 under warranty, and the original th350c. Thread starter Scottm; Black Bear says they can fix the tune, so I'm going to send the ecm back up there next week. This difference in injector size was the reason why dry nitrous kit manufacturers had 150 hp kits for the 98 and 01-02 F-Bodies and only 125 hp kits for the 99-00 cars. It has 9. HP Tuners LLC, Tuning and Diagnostic solutions for your GM, Ford and Dodge based vehicle. James and I disassemble the 454 down to the rotating assembl May 7, 2017 · The truck is a 1982 Chevy c10 with stock height. It seems pretty strong. Quick Navigation GM V8 Tuning - Engine, Gas (Gen 3) Top. To recap, it had only 22 deg advance at wot after the first initial tune, still only 22 degrees after first adjustment and still only 22 after the second adjustment. Mar 7, 2006 · I have a source for gen 6 454 motors that are all low mile takeouts. Then you need to have the PCM programmed with the 02 Express Van 350 3500 code and then set it up to what you need for your 454. My application is a rebuilt and hopped up L29 gen 6 454 getting the 0411 ecm swap. If you want to do the 0411 PCM swap or have a 1996+ Vortec motor this is your forum! 1. Started by Philip, 09-18-2016 11:58 PM. I read an article in one of the hot-roddy magazines (Chevy High Performance, I think) about the Vortec 7. New Genuine Bosch, Generation IV Fuel Injector Upgrade. Sep 18, 2016 · L29 454/4L80 swap Building a 72 Chevelle wagon with an L29/4L80, 12 bolt posi with a 3. 08-01-2018 #7 Fast4. The guy did a different intake manifold with an adapter to keep the tbi. ( i wouldnt run it over 5000rpm) even the less powerfull ones put out 300 hp or so factory and a bunch of torque. 0411 swap on 99 Vortec 454. hpt. 3. Copy the main ve before you change cylinder volume, then paste it back in after the change (it changes proportionally when you change cylinder volume and you need to change it back). The L29 is considered the Gen 6 big Mar 28, 2016 · View Full Version : Shared L29 (454) tunes. All the Vettes in 01-02 uses the larger LS6 injectors which are 3. For GM vehicles, the Vortec variant increased power by 60 horses. I know re-injuring stuff can be absolutely soul crushing. The wiring is slightly different between the 96, 97, and 98 to 2000 trucks. It will then show the distributor timing degree #. These heads actually look pretty good to me, if you can overlook the weight and the non-adjustable valve train. So yes, for the L29, 100% positive, a cooler thermostat WILL help power. inj. Everything was in great shape except the bearings. I was wondering if someone could help me with the 96 blackbox to 01 411 pcm much help appreciated. Location. 4 wheel discs from a 99 Trans Am will provide the stopping power. The Seasonally Frozen Wastelands. Feb 3, 2023 · Specs below, tune file and log attached that so far is just Injector data, RPM, idle base flow upped 20% and idle timing increased a little. The Vortec 454 L29 is a GEN 6 BBC as is ssome of the 502 blocks. Also known as the Vortec 7400 (7. Specs are. It will be very resistant to preignition. Just keep it stock, stock tires and keep with maintenance clean the egr vavle, run some seafoam through the intake to clean some of the carbon buildup out thats restricting flow, keep tires at right psi, ect. So even with 87 octane, it Dec 7, 2019 · In this video James takes us through the motor build from short block all the way to long block. It has a stock L31 350 vortec, 4L80, and 3. Sep 2, 2011 · zach01s said: the 454 is a torque motor, high low end and a bit lower rpm range. 4l_4L80e_stock_file. Just change cylinder volume and injector from black box file. Sep 14, 2015 · The L29 454 was originally rated at 290 hp and 440 lb-ft of torque thanks to a combination of fuel injection, large oval-port heads (to replace the peanut ports used in the previous Gen V motors) and a slightly higher static compression ratio. 1 highway. ALWAYS 18. I'm not trying steal a tune I just need a starting point. Thread starter Scottm; It takes some getting used to when tuning. 454 bored . Sep 12, 2023 · I just bought an L29 454 out of a 2000 suburban, and the motor has a supercharger and 44 lb/hr injectors in it. Currently I’m using an 8. Feb 17, 2008 · To set it you need to have a scan tool hooked up to the diagnostic connector. Posts. My K2500 Suburban is powered by a vortec big block, aka 7. It varys some on decel, but 97% of the time it stays on 18% rich. 050 cam, stainless headers, 5-0 racing 30lb Bosch injectors, 2001 0411 swap from an L31 5. PM Jeff "LEXTECH" he will be able to I could use some help setting up my base tune for my 0411 swap on a stock 1998 L29 454 manual 4x4. 73's. A friend who had a 8100 Avalanche was getting around 11-12 city and not sure on the highway, but overall he always bested my 454 in mpg. 4 bolt main caps. May 1, 2024 #372 L31MaxExpress I'm Awesome. 7 vortec engine, and it also used the 0411 pcm. A 496 and "only" 500 horsies would mean you did something wrong. What we know: MAP is good (verified with my laptop reading the PCM and a vacuum pump), MAF is good (put it in my LT1 car and verified BLM's are Dec 19, 2018 · I just tuned one locally. 7 lb/hr. 8 454’s to 489 or 496(030 or 060 bore 4. -Use blue loctite, or pipe dope, to seal the intake manifold bolts when you tighten them down. Oct 23, 2021 · GM 29lb/hr injectors for 0411 swap. Gains of 1/2 - 1 MPG. May 1, 2024 · 99 L29 454 build. Been reading the net the last few days on power upgrades for my truck after reading the "best year diesel" thread on here. As temps increase, timing gets pulled back. Its stock with LS7 intake/injectors. com. UltraPower 7. even with a factroy cam and little bolt on go fast stuff itll make your car a monster. He has been providing me NA tunes for 2 years now and he happens to be very familiar with tuning the L29 with superchargers. Jan 6, 2010 · The 12200411 PCM can be installed into the 96 to 2000 GMT400 trucks simply by repining the PCM connector terminals. 1L chamber is similar to the L29s. These MPFI setups run at 58-66 psi. Jun 14, 2006 · Odd though, that the 454 with the same came peak power comes in at 400 rpm less. It was available from 1996 to 2000 in 2500/3500/3500HD trucks and 2500 Suburbans. Fuel is dialed in, but I’m looking for tips on timing on 87 for a little better performance. NEXT TO GET A TUNE, FROM A REAL TUNER. We no longer offer tuning for the 1996-1997 model years. Engine is only making 11" HG so a hydroboost from an 03 1 ton Chevy was modified and installed to provide the power assist. Jun 26, 2016 · Oval port intakes. Jun 26, 2018 · The L29 454 did not have coil on plug, but the Topkick and Kodiak trucks had the option of an L21 454 which ran the 0411 and coil on plug ignition. This engine series was utilized on Chevrolet and GMC large truck models such as 2001-2002 LS1 uses 3. 1 lb/hr. Using a CR calculator puts this cr at 9. I emailed BB a log of the current tune along with a log from the previous tune and I see no difference. What I ended up doing is matching parameter sets with a stock file pulled from black boxes and then started tuning everything else. I tore it down and found it was in fact low miles, though probably more like 20-30k. They run quite a lot dirtier than a LS. The engine makes about 350 HP and 500 LBS of torque, and revs Sep 30, 2016 · Aug 2006. At 5700 pounds empty there just isn't enough motor there for towing much of anything. The same cam with more lift, a tighter LSA, and straight up or advanced would be noticeably improved. 4 vortec, or L29. 5 lb/hr. David in Illinois said, "Just wanted to thank you for your advice on my 454 Sep 17, 2007 · If you look at the PCM tune for the L29, going from 195 to 180 will help timing some and keep power solid. Jan 5, 2021 · Need to do a tune up on the new beast and there's tooooo much info and variables. 5-14 highway and 10ish city. It’s certainly best known for its stretch in muscle cars of the early 70’s. 4l 454 411 pcm swap. (29 inches is absolute vacuum). The engine displacement in liters is 7400, which is readily changed to 7. I dropped L29 heads onto the 454 in my boat. I used excel and converted the MAF and VE table from the black box to the 0411 pcm. Feb 20, 2020 · Location. 0411 PCM. Comp Cams XR264HR-13 towing cam. 4L (J) Projected life expectancy for this set of fuel injectors: More than 250,000 miles. Just want a good dependable plug for 96 stock 454, thanks for any and all help guys! Im hearing good things about ac Delco iridium plugs? Nov 2, 2023 · I have a 97 K3500 with new, warmed up L29 454 with ported heads and intake, comp 212/218 at . It should make around 5 psi max. They are pretty fast turnaround. I THINK I want a diesel until I look at the prices. And peak torque is much less than the 502 and at 400 rpm higher. By atlk2500 in forum Vortec V6/V8 Specific Replies: 3 Last Post: March 30th, 2016, 07:36 PM. Dec 29, 2020 · 1. So I'd ignore what it does short of fully warmed up for now. Any help would appreciated. Engine has replacement Brodix heads and a cam. He is going to send me flow matched 42/lb-hr injectors and a custom supercharger tune ECM. 12561462, 01-04 vette, 29. Lextech has the correct wiring diagrams, PM him for additional information. Feb 14, 2020 · Find a 2001-2002 pcm and use a 2002 express van calibration. Last time I showed you guys the wiring process of converting this 1999 K2500 Big Block Truck from the black box PCM to the more powerful 0411 LS1 style ECM. gmt400. Just dropped a new LSX 454 crate engine into my 62 vette restomod. 7 lb/hr at 58 psi. 4L ECM Benefits: Gains of 40-45 HP and 45-50 lb-ft torque depending on existing upgrades. At a guess, if it is a coil on plug then it probably is an LS1 style PCM, in that case, the 1999 PCM was Service # 09354896. Bottom end is stock. Aug 24, 2021 · The old engine is still running pretty well except for leaks, smoking, and hard hot-starting, so I can take my time and build the 99 for much better power and mileage. 4L Vortec Engine L29; 1998-2000 Chevrolet and GMC Pickups and SUV’s with 7. I would like to know what modifications are needed to help make even more horsepower and torque. Jan 17, 2020 · Arizona. ~Erik~. #8 · Jan 6, 2013. Either one with those mods should out pull a 454 burb all while getting better MPG. Sep 5, 2023 · Hi all. 1 timing table and shift points. 7 van tune to start. I am in a similar situation with hernia surgery complications/pains and it's really putting a damper on all the little projects I want to tackle on my 1998 454. . Thread Tools. The 2002 express van was still using the 5. I'm running a ZZ502 cam, long tube headers, 4" diesel exhaust, and some other goodies. skills4lou. worth the swap in my opinion. #1. 480"/. Oct 10, 2021 · Quick Navigation. i have ceramic coated headers, msd streetfire distributor, msd cables, aluminum 2 row radiator, electric fans , 781 heads ported, scorpion roller rockers, compatible drive train and all Apr 14, 2016 · Lidstrom Discussion starter. I have all the parts and figure this should be a 2500-6000RPM with 400-425HP Nov 13, 2014 · 1,171. 5:1 compression with the stock l29 vortec heads, which are stock but have an adjustable valvetrain conversion and roller rockers. Very usual to stroke 9. 7L 2500 van, and best-guess initial tune for my setup by Black Bear on the 0411 (sorry. ^^^^^ 4. If you do the swap you will have to do a Crank relearn. Then get the scan cable for a couple of weeks to log data, and send the log files, scan cable, and 0411 back to let them analyze and apply a new tune based on the logs. Probably one of the most common problems with the 7. Get an 0411, 2 80 pin connectors, and you need wiring diagrams for both, pull the wires out of the Vortec Black Box PCM and put into the 80 pin connectors. October 24th, 2011, 01:53 PM. They said that's what it should be and any more was risking 'destruction'. The GM tune adds a lot of timing advance once it is richer than stoich, some as much as 8* in places. L29 454/4L80 swap. 1's idle control spark tables will give you a much much smoother idle. These arent really peanut ports. Jan 6, 2013 · bighoss77. In this video we get to see a quick junkyard peek, as well as the next steps in the engine build. Apr 29, 2012 · I have a gen 6 454 in my truck. It is also a newer pcm than the vortec pcm, more memory faster process speeds etc. 030 over. Go back to the first couple pages of this thread and see how I laid back the chambers and polished everything. I have a 99 K2500 Burb with the 7400/L29/454, tuned by Jesse (love the tune, great power). Oct 17, 2011 · Honestly having a L29 454 (4L80E) and having tuned a L18 496 (4L85E), if he is getting 7-8 highway the tune isn't the problem. The vacuum level is typically about 15 inches at idle to 24 inches when coasting down. Truck is all stock with exception of injectors. 4 is rated at 290 hp and 410 lb/ft torque. #2. BOTH TUNED WITH FLASHSCAN V2. 5. 4 L (454 cu in) V8 was a truck version of the Chevrolet big-block engine. Factory power rating was 290 HP at 4000rpm and torque was 410 ft-lbs at 3200rpm. Anyone wanting to share what you have, what works, what doesn't? I'm slowly working my way into this, my truck's doing well but I'm wanting to get it as good as possible. Intake air temps over 32C starts to pull back timing. At some point in time somebody installed a 3. GM V8 Tuning - Miscellaneous; 2000 k3500 l29 454, nv4500; Page 1 of 2 1 2 Last. 412. Did not dyno, just stteet tune with wideband. I've got a 2000 K2500 L29 454 with a Whipple Supercharger and was wondering if anyone had a tune to get me started. On the 454 it is really cheap and easy to convert to coil near plug ignition if you already have the 0411 PCM. So, I am contemplating upgrading this thing for more power, or Looking for PCM P/N for L21 454 (99 P12 RV Chassis) Anyone ever tune one and know what PCM this is? It is a 454 that appears to be a L29 but has coil on plug and is called the L21. Maintains speed and higher gears when climbing hills. I have a 400 turbo tranny. 7 Jun 19, 2009 · 391. The 7400 was essentially the same big block 454 that carried Chevy through the muscle car years, but a hydraulic roller camshaft and revised cylinder heads helped to make Hi everyone. 030 454 with a 612 lift cam. I think it will be very interesting to see what the stock tune looks like. I'm a seasoned tech but have no experience with EFI tuning. Feb 14, 2024 · L29 454 Vortec with 0411 swap - Timing at WOT. Aug 7, 2019 · 2. Dec 8, 2014 · The 0411 is a 512kb PCM that allows for a higher rev limit than the above 96-00 Vortec 305/350/454 rpo L30/L31/L29 "blackbox" PCM which has a hard RPM limit of 6000rpm which can be raised from the stock 305/350 5600rpm defuel/5400rpm refuel and the stock BBC L29 rev limit of 5000rpm defuel/4800rpm refuel, but no matter how high an rpm above May 22, 2024 · Well I'm on the 8th or 9th tune and it is still pinging hard at 1800 when towing and moderate 30-40% throttle. Long tubes and custom dual 3” exhaust. May 4, 2023 · Chevy 454 Big Block Variants. I have found info on two gm injectors: 12482704, 01-02 camaro, 28. Dec 10, 2017 · I really doubt there is anyone out there sell a harness for this engine meant for the 0411. 454 4l80e. You might find a universal harness meant for ls swaps, but it would likely require swapping in your connectors. However, it was also used in Chevy and GMC trucks from 1973-1991. 1 and you'll be fine. L29, 0411 swap, problem with running rich on start up. The Vortec 7400 was based on Chevrolet’s 1995 7. 2008 TrailBlazer SS 3SS AWD Summit White - LS2 E67/T42, bolt ons, suspension, etc. Hi , i have a L29 454, 0411 swap, mercruiser magnum cam ( tow cam ) 9. Originally Posted by 96c2500 350 vortec. L29 454 coil on plug conversion. 4L/L29 cylinder heads being the "hot tip" for big-blocks the same way the 5. Best regards, Bill. It will instruct you to synchronize the cam and crank sensors (engine running) by pushing the throttle to full throttle. Both show 6-7 deg KR at 1800 rpm and 20-40% throttle. Hello! A few weeks ago I bought a very low milage 454 Gen. Like many late-model tow rigs, my '99 K2500 Suburban is equipped with the L29 454. #1 · Apr 14, 2016. To keep the engine from having detonation, the timing advance is neutered while the engine is at full load and at stoich. PM has been answered. It would be the same as if they were tuning an 01-02 camaro at that point. Use For: 1996-2000, GMC, Chevrolet 454cid, 7. 4 216,000 on original engine lost oil pressure. 4 liters. I ported and cc matched the ports (flowed 295 cfm on intakes), chambers were cc matched and polished, and the manifold was matched and ported. 4L Vortec Engine (L29) (May require Passkey and Crankshaft Relearn Procedure; Description: His file is for his buddy's hopped up (and I think cammed) 454. Oct 30, 2013 · Suburban_1999_7. here is tune and log. 4L vortec for my 97 K3500 dually. 8:1 compression, wondering if i can get some advice , every time it starts , hot or cold, it runs rich for 5-10 seconds until it clears, the injectors & pressure regulator are not leaking. Hi guys, I know there are a few of us who are tuning the 98+ L29 motors. 18 posts · Joined 2016. Forum Rules. 4 vortec 3/4 ton long bed truck, NV4500 5spd manual trans, mainly used for www. . Nov 4, 2019 · Man I'm really sorry to hear that. the express van is where I got the base calibration for the 411 with l31 350. 5 suburban and do the turbo upgrade, exhaust, custom tune, FTB mod, remote PMD, lift pump, and other 6. 4L, Regular Production Option designation L29), Chevrolet's Vortec 454 was a modern-day evolution of the company's most legendary big block. 1997 chevy K2500 7. engine won't Jun 16, 2017 · My '99 Suburban C2500 just isn't cutting it. 0:1 I used a 5. 4L I4T E78, tuned, turbo mods, etc. Also known as the Vortec 7400, the L29 was the final and most modern iteration of the venerable big block Chevy. 672 g/sec or 29. 31 gear. 2001 1500 GMC YUKON XL 5. 2000 L29 454 Whipple Supercharger Tune. From my understanding I should contact LexTech for a Pin out diagram. Chevrolet 454 engines never really disappeared since 1970. Now what I could use help with is the injectors settings and spark table. Jul 5, 2010 · Here is the stock L29 Timing Map (the second map below is the PE mode (aka, Powervalve open timing adder to the main table). It's got flat top pistons. changed trans abuse to disabled. Dec 22, 2023 · The 502 and the SBC's I've done like this have all eventually took quite a lot of OL cold tuning. I was waiting to hear how that Blackbear box turned out as I plan on going the exact same route. Oct 5, 2020 · If you pick up a 454 and it eats/leaks coolant it's likely coming from the lower intake. But the previous owners (a corp vehicle) must have installed larger injectors, I suspect to run a higher % of ethanol fuel, if not E85, but I can't confirm. 1999 L29 7. Hey guys I'm new to the forum and new to the performance tuning. There should be square bore intakes available for these, search gen 6 454 on summit. Aug 8, 2012 · I'm getting ready to rebuild this 454/7. 95 tbi 454. Aug 20, 2014 · This might be the cheapest and most reliable route. My tips on the intake manifold job are. 4991 posts · Joined 2009. engine has cam and springs upgrade. Also using a 8. Hell, no. if under 500hp they will probably work fine if rebuilt. Something like a ho 454/502 cam should work perfect for you I think. I'm getting ready to tune it, but it's kind of overwhelming as a very beginner (I've never actually tuned anything before) as to what to change to get a solid base tune for boost. , why do you need a turbo? A 454 with aftermarket heads and fairly mild tune should do 500 aftermarket-dyno horsies without problem. Way more support and table to modify than jet dst. Disabling of emissions systems (for competition or off road use only) Custom tuned for modifications such as aftermarket camshafts, exhaust, air intake, tire size Oct 30, 2019 · Ether way I have what I have and still need to tune it, just trying to make it run and tow better. 3 lb/hr. So far that was just a cold start to about 85 degrees CLT. Almost 7,000 on complete rebuild with a mild Comp Cam. Jul 1, 2015 · Rock-n-Roller: Adding a Roller Cam to our Junkyard 454 Paid Off Big! Loyal readers of Super Chevy will immediately recognize this 454 (aka BBC Big Hero VI) as the very same engine we plucked from Jun 12, 2023 · I would have BB install their best guess tune in the 0411 to get it started and running. can't get it to rev past 5k rpm. WITH 0411 PCM SWAP. VI L29 Vortec engine with hydraulic roller. Nov 17, 2014 · took my flat bottom boat out with the stock tune and only 13-16 degrees of timing it turned only 4000rpm then bumped it up to 21-25 in WOT area and picked up some rpm to 4500 rpm whats a safe rule of thumb on the L29 heads?? I know regular bbc heads like 36 degrees or so the engine only runs at 160 degrees Mar 9, 2024 · The 454 vortec has a very similar chamber design to a 350 vortec and as such has a much quicker burn than a normal 454 head, especially the older design smog era open chambers the aftermarket tend to favor for increased flow. 1996 2500 GMC SUBURBAN 7. Typically this engine is lame over 4600 rpm (probably weak valve springs), so I rarely see over that. yl ag cz rg xf kd yn gj de ez