Suprised no one has asked the make of the headers!!!

 

Post your dyno sheets & track numbers.............I can speak from experience I would not be able to get my 00' coupe to a 12.47@112 w/o LTs........only mods are vortex CAI,FLP w/cats,PRT catback and powerloader. Stock engine. 3.15 gear and TC
LTs get most bang for the $$ under peak numbers anyway

 

I am gonna say you got the KOOKs

 

You're just not happy if you're not flaming someone are you. I only repeated what a well known tuner in Florida told me.

Many of the high performance engines being run at Moroso are his builds. I think he knows what he's talking about. He stated the stock manifolds were very efficient.

You don't like the fact that I disagree on the Vararam due to it's poor design and lousy filter, don't read it. Perhaps you should move to Cuba. People are not allowed different opinions there either.

I live in the USA, post in a public forum and you don't like it. Tough.

Sorry Irish Whiskey for getting off track. Some things just need to be said. All I was trying to do was let you know what the tuner had said to me. I'll get off this one and let Mr. Hotshot rant away.

And I might add he's not my tuner as I live 200 mi away.

 

Yep, with my FLP's, Fast 78mm Intake and a tune I picked up 20hp, but I am making 300ft/lbs at 2500rpms, with is 50 more than stock. It peaks at 350 and the torque curve is very flat.

Something is odd with your headers, which ones are they? What were your final numbers? Were they able to measure your AF ratio?

Good luck,
S.

 

I agree..............but not AS efficient as a good set of LTs........1 5/8, 1 3/4 or 1 7/8s used in the the right application

 

Here we go again play nice boys.

 

304rwhpw/ new headers - was 304rwhp before header application.
Best time before headers was 12.81/110mph last Fall in cool air.
Best time last Saturday with warmer weather was 13.1/108mph

 

You are correct - they are the 1 3/4 Kooks into 3" with high flow cats. Now I need to know how you knew!!!!

 

C'mon Bob.. I hardly "flamed" you. I would think by now your skin would be tough enough to take some ribbing by now..

And you know, IF you had come on to this forum and said "the Vararam is a very nice idea, which should make more HP over the stock intake, but I won't use it because it has crappy build quality and insufficient filtering", well, hold on there, that's MY position fur C's sake!!

But that's not what we heard from you.. We had to listen about all of the highly technical reasons as to why the Vararam can not possibly make an LS1/6 motor produce more HP, despite (are there any exceptions?) every single CF members personal experience to the contrary..

Fast forward to this thread.. A guy comes here with a story about installing LT headers and recv. NO gains, and instead of taking the "high road" and making suggestions as to what the possible cause might be, you jump straight to "Ahh, see, that's because they don't really help a stock car.. Stock GM parts and engineering can't be improved on".

C'mon now.. Just like the Vararam, has ANYONE here ever properly installed a set of well known LT headers and gained NOTHING over the stock manifolds?

I'm sure there are other factors involved here.. Hell, I gained 12 HP with just my BBB "shorty" headers, and it will probably dyno higher than that on the top end since I subsequently found that one of the spark plug wires were damaged during removal / reinstallation!

Anyway, like Bob said, back to your regularly scheduled program.

 

part of that (but not all) is due to the great flow available from the factory exhaust system. With the C5, the factory exhaust is not all that restrictive (on a stock/mostly-stock motor). Serious header gains can be found on a C5 that has had a H/C upgrade and/or blower.

 

Again the sheet will tell the whole truth, under the curve ............as already asked a/f, torque #s, 60' etc........DA..........I log the actual temps because the warm air/cool air can be 2/10s alone easy

 

I would call the tuner and tell him what's up. I am guessing a new tune may catch what's wrong. You should be, depending on weather of course at least 3 mph faster on your trap speed. If you are getting good traction around 2-3 tenths faster. Something is wrong. With your original tune did you do a SAE corrected HP? If you did compare the SAE corrected HP to eliminate the wx factor. Also do you have wx data and 60 foot times of the runs you are comparing. That may help to analyze your problem also. Good luck.

 

I would agree with you Bob if the intake system has not been improved, or if the car still has stock cats and exhaust system. If the car can not breath any better, or the exhaust system is bottle necked after the headers you probably would see minimal gains. But he has opened up the intake and the remaining exhaust so I would expect fairly descent gain of at least 20 HP. Most guys with his mods will see around 330 RWHP and averaging around 12.60 ET's. So I would agree with your tuner that the stock manifolds flow descent compared to the other stock components, but once a CAI, high flow cats, and cat-back have been added the LTs should add some power.

 

Uhhhh...researched your posts...took me all of 30 seconds

 

Was your cam installed at same time or after headers? Is it a Comp. Cam? Looking at cam with specs similar to yours LSA114+2

 

Tough skin has nothing to do with you being rude.

I never posted highly technical reasons. People that haven't studied physics and fluid mechanics wouldn't have a clue what I was talking about. That would be like me trying to understand a tuner.[/QUOTE]

I didn't say that. The tuner did and I simply passed along what he told me. How the hell would I know what his problem is. Part of this forum is to exchange info.

Are you kidding or just not comprehending? That's the reason for this post. Hello, anyone home?

 

I have the dynatech long tubes and gained 9rwhp and 17rwtq with the headers and a tune. Before the headers I my car was tuned to 316rwhp with only a blackwing and catback with an x-pipe. My baseline after the header install was 317rwhp. But, I was running quite lean and picked up the extra ponies by altering the A/F ratio. Hence, with headers I was tuned to 325rwhp and 334 rwtq. I was very dissapointed with the results and my tuner also advised that he has seen many ls1s come in with headers that claimed big hp gains and often gained very little and in some gains lost hp. I think everyone can agree that bolt ons alone are not going to give you big gains. Going from a fully tuned car with stock engine parts, adding headers and a tune, I think most will see between 10 and 20 rwhp gains and not much more. But, you are going to need the updated exhaust system if you ever go with an aftermarket cam, heads, or s/c. Stock manifolds are much too restrictive for those additions. My car sounds better, but honestly it is a better performance choice to go with gears and torque converter rather than just headers.

wow, 304rwhp defintely doesnt sound right. could there be an exhaust leak or crossed o2 sensors? I would first think that the installation was not performed properly

 

This is essentially what my tuner told me as well.

 

I picked up 3 mph and .14 sec with my install and no tune. Give me a call and we can talk about your results.