Is my '01 LS1 a lemon?
Thread Starter
Staging Lane
Joined: Oct 2004
Posts: 97
Likes: 0
From: Grand Blanc, Michigan
Is my '01 LS1 a lemon? Hey guys. I just dropped my car off to get it dyno tuned. I have the following mods bolted up:
K&N FIPK II cold air induction kit
MSD wires
AFR 205 heads w/ 66cc combustion chamber and 8019 spring upgrade
Comp cam w/ 228 in.dur. 230 ex. dur. .571 in. lift, .573 ex. lift, 112 LSA
Comp roller rockers w/ 1.75:1 ratio (makes lift ~ .588 in. and .590 ex.)
Comp pro-magnum lifters
Comp Hi-Tec pushrods 7.400
FAST LSX intake
FAST 90mm T/B
Stock injectors (have FAST 36# injectors but think they were too big)
SLP ceramic coated, polished stainless, long tube headers
SLP underdrive pully
Corsa catback system (no cats)
To my suprise on the first pull it only made 290 hp and 302 lb. ft. tq!
I though for sure I sould be at least around the 360 hp range w/o a tune and with these mods. I have an 01 WS6 w/ M6. Why do you think this is?
K&N FIPK II cold air induction kit
MSD wires
AFR 205 heads w/ 66cc combustion chamber and 8019 spring upgrade
Comp cam w/ 228 in.dur. 230 ex. dur. .571 in. lift, .573 ex. lift, 112 LSA
Comp roller rockers w/ 1.75:1 ratio (makes lift ~ .588 in. and .590 ex.)
Comp pro-magnum lifters
Comp Hi-Tec pushrods 7.400
FAST LSX intake
FAST 90mm T/B
Stock injectors (have FAST 36# injectors but think they were too big)
SLP ceramic coated, polished stainless, long tube headers
SLP underdrive pully
Corsa catback system (no cats)
To my suprise on the first pull it only made 290 hp and 302 lb. ft. tq!
I though for sure I sould be at least around the 360 hp range w/o a tune and with these mods. I have an 01 WS6 w/ M6. Why do you think this is?
Thread Starter
Staging Lane
Joined: Oct 2004
Posts: 97
Likes: 0
From: Grand Blanc, Michigan
Originally Posted by Cal
Something wrong there for sure. A tune would account for maybe 30 hp, but I think you have some other problem too. Maybe the cam sprocket is off a tooth?
Thread Starter
Staging Lane
Joined: Oct 2004
Posts: 97
Likes: 0
From: Grand Blanc, Michigan
Originally Posted by 2001 Pewter WS6
What were the final numbers. My A4 383 stroker only made 360 on its first pull and was extremely rich. It made 460 when he was done tuning it.
whoa....thats messed up. you should definitely be closer to 375-400. you sure you're runnin on all 8 cylinders? new plugs, good spark, fuel pressure good, injectors working , PCM isn't throwing any codes? things to check out.
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Originally Posted by FIREHAWK#608
Perhaps it's the dyno operators, or maybe your engine isn't actually a V8??? 
Thread Starter
Staging Lane
Joined: Oct 2004
Posts: 97
Likes: 0
From: Grand Blanc, Michigan
Honestly I never checked to see if it was runnin on all 8 cylinders. It didn't sound like it was missing. I have brand new Iridium plugs (never checked the spark, but gapped to .060"), fuel pressure is between 56 and 58 psi, as far as I know all injectors are working and they are working on the engine codes. They were doing the tune then checking the codes. 1 thing though, the fuel is from November, but I put that "stabil" fuel stabilizer in it. Still would that rob me of 60 hp? Also it is a Dyno Jet dyno and it is a V8. I did all of the work on it myself.
How would I go about doing a compressinon/leak down test? Also it did sound (at one time) like I had a slight knock around the #3 cylinder. Maybe I need to adjust the preload on that lifter. Though I couldn't hear it when they made the first pull. Would that also account for the lack of that much hp?
How would I go about doing a compressinon/leak down test? Also it did sound (at one time) like I had a slight knock around the #3 cylinder. Maybe I need to adjust the preload on that lifter. Though I couldn't hear it when they made the first pull. Would that also account for the lack of that much hp?
your tuners should understand how to do a leakdown test, otherwise do a search for the instructions.
if your fuel is from november, you might want to try and replace it. it could have gone bad anyhow.
if your fuel is from november, you might want to try and replace it. it could have gone bad anyhow.
On The Tree
Joined: Mar 2005
Posts: 108
Likes: 0
From: houston, tx
i would say check the plugs and wire, when we did my friends headers we forgot to put th # 1 plug on the drivers side back on and his car had a significant loss in horsepower, plus we couldnt hear that he was only runnin on 7 cylinders. hope this helps and i hope ur problem is as simple as something like this.
Thread Starter
Staging Lane
Joined: Oct 2004
Posts: 97
Likes: 0
From: Grand Blanc, Michigan
Originally Posted by cyphur_traq
no offense, but how the hell would he have AFR heads, a custom camshaft, a FAST intake, and long tube headers bolted up if its not a V8?
Originally Posted by cyphur_traq
no offense, but how the hell would he have AFR heads, a custom camshaft, a FAST intake, and long tube headers bolted up if its not a V8?
The #s do suck. 
wow that does blow. I doubt the fuel would account for 100 HP...you should definately be over 400 at the wheels w/ your setup. I would check for codes, check for all cylinders firing, then leakdown/compression test if you still can't find anything. How many miles?
11 Second Club
Joined: Feb 2003
Posts: 5,524
Likes: 1
From: The South
I wouldn't worry about a thing until it's tuned. Tune could be waaaay off. It's not looking good though. What dyno is it? If it makes you feel any better I made 343 rwhp and 348 rwhp with the magic stick v.3, longtubes, duals and a lid. Tuned. 
Thread Starter
Staging Lane
Joined: Oct 2004
Posts: 97
Likes: 0
From: Grand Blanc, Michigan
Well thanks for all the ideas guys, but it turns out that I was worried over nothing. After the final tune I made 425.44 RWHP and 390.89 RWTQ. I can't believe that a good tune could bring out that much power. I am amazed. Here are the dyno results. I am still making power when I hit the rev-limmiter. I love how flat the curves are. Sorry the pics are so big. I don't know how to shrink them down.
Before:
After:
Before:
After: