Ls1 heads and cam low on power
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Teching In
Joined: Mar 2012
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From: Long Island
Ls1 heads and cam low on power I jus did a swap on my 99 camaro. The heads are prc 227 heads with a torquer v3 all supporting mods through a yank ss3600 and only put down 370 on a dynojet. What could be wrong the car seems to be running fine.
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Numbers are low for such good parts, more info needed on your setup like intake, exhaust set up & etc??? Even 400 rwhp would be low imo with your setup if you have a good flowing exhaust setup & atleast a ls6 intake!!!
Thread Starter
Teching In
Joined: Mar 2012
Posts: 17
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From: Long Island
It has american racing 1 7/8 headers into slp lm 2s fast 90 nick Williams 92 throttle body tsp 103 maf 165 thermostat
Your Numbers are way low imo, even with a stalled a4 I would expect 430+ at the lowest something is wrong, what did your tuner say I would expect any great ls1 tuner should no that these are low numbers for a h/c/i ls1 was any input given on the tuners part???
Thread Starter
Teching In
Joined: Mar 2012
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From: Long Island
I'm using the best tuner on long island nd he said jus do a leak test then the compression test then go from there
Did you do any baselines prior to the install with the stock heads? I've seen alot of 98-99 motors not make much power and then I've seen some make crazy power... it's the luck of the draw on those older LS1 engines IMO.
Had a PRC st2 243 headed 99 model with a EPS 226/230 cam only make 2hp more than my cam only 02 LS1 if that tells ya anything!
Had a PRC st2 243 headed 99 model with a EPS 226/230 cam only make 2hp more than my cam only 02 LS1 if that tells ya anything!
IMO your low on the stock numbers. Alot of dynojet readings on stock LS1's I've seen that were healthy would make in the 290's. Not too much lower but still sub-par anyhow.
The best thing to do is get it to the track and see how it does cause dyno's don't mean anything. Some car's just work better on dyno's than others. I've had a couple C5's on mine that were just plain freaks on the dyno but wouldn't fall out of a tree.
The best bet is to ask your tuner for some datalogs of how much fuel it was using to get a better idea of whether you are not making power due to airflow/fuel related or just driveline related. The fuel usage 90% of the time will give you a good idea of how the car will run.
I can tell you if you are still on stock injectors for a 99 model and afr is still good that you have an airflow restriction somewhere because I normally max out those injectors on some cam only setups.
The best thing to do is get it to the track and see how it does cause dyno's don't mean anything. Some car's just work better on dyno's than others. I've had a couple C5's on mine that were just plain freaks on the dyno but wouldn't fall out of a tree.
The best bet is to ask your tuner for some datalogs of how much fuel it was using to get a better idea of whether you are not making power due to airflow/fuel related or just driveline related. The fuel usage 90% of the time will give you a good idea of how the car will run.
I can tell you if you are still on stock injectors for a 99 model and afr is still good that you have an airflow restriction somewhere because I normally max out those injectors on some cam only setups.
Hey don't stress the numbers so much man! I've personally seen dynos (mostly Dynojets) vary a lot. For instance mine made 405 rwhp with mods in my sig. This was on a Dynojet, and my tuner said almost all HCI LS1's that he sees make 390-420 rwhp on his dyno. In fact there was a 1999 HCI WS6 with Trick Flow heads, M4 cam, Fast intake, long tubes, etc...that dynoed a few days earlier on the same dyno and it pulled 413 rwhp. Don't stress it...take it to the track and see what it does
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Hey don't stress the numbers so much man! I've personally seen dynos (mostly Dynojets) vary a lot. For instance mine made 405 rwhp with mods in my sig. This was on a Dynojet, and my tuner said almost all HCI LS1's that he sees make 390-420 rwhp on his dyno. In fact there was a 1999 HCI WS6 with Trick Flow heads, M4 cam, Fast intake, long tubes, etc...that dynoed a few days earlier on the same dyno and it pulled 413 rwhp. Don't stress it...take it to the track and see what it does