git_sum

iTrader: (10)

Does anybody know why the new GTO's are rated at 350hp and 360torque? Isn't it the exact same Ls1 as found in TransAms and Camaros? If not whats the difference between the ls1's in the TransAms/Firebirds and the GTO's/Corvettes?

VIP1

The difference between GTO/F-Body/Corvette is intake plumbing (air box etc, not intake itself), exhaust and cam.

--VIP1

BlackTA

iTrader: (1)

isnt the GTO a bit heavier than the f-body too? like a couple hundred pounds or something?

jRaskell

iTrader: (1)

Considering the vast majority of F-bodies dyno in the 300rwhp range (which is 350 crank hp), there really isn't any significant difference other than what GM decided to advertise. Well, it would have been tough to advertise it @ a lower hp figure considering Holden has been advertising 350hp all these years. Holden never had to compete with the Vette though, and that is pretty much the only reason the F-bodies were underrated to begin with.

jrp

iTrader: (16)

VetteCrazy

There is very little differences none which is in the motor!
I don,t think they will be recognized as a true sports car again I think it will be catagorized as a car like the impala!!!
Just my intuition.

ActionJack

Not to get off the subject but there are 2 things that I like about the GTO besides its name and it uses an LS1. It comes with a strut tower brace and the plugs and wires are easily accessible. However, there is no extra room for a Supercharger or Turbo that I can see.

demonspeed

iTrader: (7)

That's the only reason why the f-body wasn't rated at 350/375. Now that the C6 is coming out, GM can afford to rate cheaper cars the same because they know people are going to go with a base model 400hp C6.

git_sum

iTrader: (10)

So one guy says the intake plumbing, exhaust, and cam is different. Another says its all in advertisment. Which is it? So do the Ls1's in TranAms and Camaros really make 350hp and 375tq?

Nick D

Ever notice how a Vette sounds different and has a different intake system, even though it is an LS1 (exc. the Z06), the same holds true for the GTO and TA/Camaros. I believe what they are trying to say is that the intake plumbing, exhaust and cam are different on the GTO, the F-Bodys, and on the Vettes. However, the difference is neglible, not enough to cry about. Simple bolt-ons on any of the three will make them equal. But Vettes are marketed as having higher hp figures to sell them as the ultimate GM sports car. Hope this clears things up.

jaberwaki

stock gto's will not out perform stock f-bodys...
they are 2 heavy
IRS sucks..

and dogon it they look like a maxima

demonspeed

iTrader: (7)

It's both. The intake plumbing and the exhaust plumbing are the differences, but it's not like they make up for 40hp/35tq.

z98

The new vette is 400 hp so they can say the LS1 has 350 now.

Benjamin Russick

iTrader: (1)

They have a different cam than a "regular" LS1 which makes more torque. This is helpful with the GTO's extra weight. The GTO also has real dual exhaust and is easily supercharged.

ActionJack

I thought the new Vette had another block, LS6 (not intake either but block)?

Benjamin Russick

iTrader: (1)

The C6 is a whole different animal from the GTO. I was referring to the GTO in the post above. The GTO is supposedly going to get the Z06 drivetrain for an upcoming model..."Judge" maybe?

DANSLS1GTO

Actually, I thought this too - but when I pulled info on the stock GTO cam and the Cam from the last f-body LS1's the numbers came up identical. Now, the only reference I've seen for the cam numbers in the GTO is an article on the Autocross car, which was comparing the LS6 cam and they could have had old info...
Dan

steve2001sh

Which has more power? Who knows? GM likes to play with numbers, so you can never be sure. We'll just have to get one on a dyno. If 350 is right, then it's about the same as an fbody (after adjusting for GM lying factor), but who knows if their numbers for the GTO are accurate either. Let the dyno see.

demonspeed

iTrader: (7)

There have dyno'd several. I've only seen the automatic numbers, and they were less than 300 at the wheels.

Benjamin Russick

iTrader: (1)

Hmmm. Holden was the ones who released the statement about a different cam, but I guess that could have changed before the production run. Most auto GTOs ave been dynoing in the 290s, so right in line with a LS1 F-body after taking into account the parasitic losses of the IRS...