When the LS1 was put into the Camaro in 98, it was a de-tuned vette LS1. What was done to de-tuned the4 motor and can it easily be reversed?

 

different exhaust manifolds and different PCM tune.
Put headers on, ported TB, LS6 intake and retune

 

nothing, its the same motor sans the obvious differences; pan, fly by wire, ect.

read the FAQ

 

No it wasn't. The hp numbers were de-tuned though.

 

Getting a lot of mixed opinions here. I know that there were some changes, according to all the literature I have read. They just haven't been specific as to what they were.

 

like i said, beyond the obvious there is NO difference that is measurable. samee block, same, crank, same pistons, same rings, same bearings, same lifters, same heads, same cam duration (lift if marginally different), same intake sans EGR, same injectors, same manifolds (just packaging differences), ect.

you get the picture. the only difference in ratings is on paper, vettes and fbody's of the same year and tranny will dyno the same. vettes usuallly a bit less due to IRS.

 

Why is the lift marginally different? How different is it?
Why would GM purposely make something so small as a "marginal" amount of lift specific to the F-bodies or Vettes?

 

.500 vs .496 (98 vs 98 for example)

also lsa and overlap are a bit different because c5's dont have egr. the 98-00 and 01+ fbody cams are different, but would one swap one for the other; no, because the difference is marginal .

hell, even with aftermarket cams you'll be hard pressed to find much differencee betweeen two cams cut on the same lobe with only a degree or two of seperation.

 

We all know that that fraction of an amount leads to the 25-45 horsepower discrepency between F-Bodies and Y-Bodies . Or it at least gives GM the ability to say their is a difference (how ever so slightly) between the two thus giving the ability to list different power numbers and allow for the $10-15k "market adjustment" for the Corvette.

 

...but this marginal difference equals 25-45 hp? I'll take that!!

 

here try this, buy a camaro, yank the LS1 out, buy a Vette, put its LS1 in the camaro and what do you get, the same damn thing you started with

that marginal difference is not 25-45 HP, GM only states the Vette with higher numbers becuase if they told everyone that the F-body, which cost about half as much as the Vette, has the same HP as the Vette less people would buy it

think about it, would you buy a $20K with 300 HP or a $35K with 300 HP?

 

I don't think anyone is paying for the vette over the f-body simply because they think it has a little more hp. They are two different cars even if they have the same power. Stock vs. stock, the vette's crank hp may be slightly higher due to true duals if anything, but that's soaked up by the IRS. They seem to dyno very close for rwhp with all other factors matched (year, tranny etc.) The rating differences are because GM gave the flywheel numbers. I'd agree it's probably more for marketing than anything else.

 

I think the thing Iquois is missing, because nobody in this thread has said it plainly yet, is that LS1 F-bodies were underrated by GM. The power ratings given by GM for these cars are WRONG. Their actual power output is the same as the LS1s that were used in Corvettes, since the engine is for all intents and purposes identical. The minor differences JRP was talking about don't actually lead to a 25-45hp difference, they lead to nothing at all (except the IRS thing, but that's not engine). These guys here know tons more specifics, I just know they're the same engine, but I guess sometimes it's taken for granted that everyone knows the F-bodies were underrated.

And if you already knew that, forgive me for being repetitive.

 

It was not detuned, same motor, slight differences, but overall they have the same hp.

Here's a good article, where they dyno'd a stock '98 M6 T/A and a stock '98 M6 Vette

 

i was looking for that muthafucka but i couldnt find it.

 

if you actually believe that, then, wow.....

 

did the IRS eat up that much to actually make the TA put down more power to the rear than the vette??? Dont know much about the IRS except for the basics...I have always dealt with solid axles...I know the independent is set up for more grip and a better ride but does it really eat that much power??

 

Wow.........didn't say I believed it!!

 

you just like to egg people on and such? pretty obvious you missed the point.....


anyhow, the y-body and f-body have basically the same motor. this topic should be over with.

 

[QUOTE=cyphur_traq]you just like to egg people on and such? pretty obvious you missed the point.....
Yea..guess I did!