Ok...

Here is a good question here. Which would win. Lets say both drivers are equal and both cars are stock. I believe it was the Iroc Z that came with the LT1 so lets say Iroc Z LT1 powered Camaro VS GrandPrix GTP. Straight line, 1/4 mile race. Which would win and why?

I don't know much about the LT1 except for the heads use somethign called reverse cooling and as far as the GTP goes I just know its about 300lbs heavier but its supercharged.

Well what do you guys think. Maro or GTP

 

An L98 Tpi camaro will walk a GTP

irocz didnt come with LT1, that was in 93-97

if LT1 was in Irocz, then thats about 300hp so mid 13s is possible so GTP would get walked real hard. LOL

GTP is like 15.0 second car with some in high high 14's. LOL TPI 305 stick car with gears will run with them

 

i waxed a stock gtp when i was stock. i walked a exhaust, intake, pulley, chip gtp this year

 

If they up the boost much more though we can be in trouble very quickly. It doesn't take much money to get a GTP into the 12's.

 

I'm kinda confused. Is this "race" GTP vs. LT1, GTP vs. Iroc, or GTP vs. Iroc with LT1? Any way you look at it, GTP loses if both are stock.

~Matt

 

I have seen a GTP at the local track running consistant 14.40's in the quarter.

 

some of you guys must not know too much about the gtps. We have a 2000 gtp , stock it ran a 14.7 @ 92, with about 800 bucks worth of mods, it now runs 13.8 @ 100.98. So you guys have to watch out . And if someone is serious with the car they can run low 13s and high 12's for about 1500 more.

 

Also, what year of GTP? (They started having them from '91 and up to present.) If it's pre '97, it (only) has the 3.4 DOHC engine, although a stout little motor, is only naturally aspirated. '97 to '03 (I think, that's the second-gen W-body ones, anyway) have the 3800 with the supercharger. I'd personally like to own a '95. I'm not sure what the newest iteration runs, but it's supposed to be better, even though the motor carried over, I think.

 

I have a 2000 GTP that ran a best of 12.34 @ 112 mph, with 11 psi of boost. Yes they are 15 sec cars stock. BUT, watch out!


Ray

 

Stock they are around 14.9 to 15.x

Smaller pulley and CAI 14.4ish

More mods and smaller pully high 13's

Heads and cam, 12's

 

you can definitely make those things very quick in a hurry. high 12's is doable. if you have a 350 you should be able 2 win, but dont be surprised if you dont.

 

Well, since this is about a Stock LT1 Iroc and a Stock GTP, its gonna be the LT1 Iroc that wins this race.

 

the new GTP's are pretty easy to make fast. i personnaly ran a GTP down the track and ran 14.6 stock, and another car 14.7. with airbox and 3.3 pulley this weekend, ran 13.7. you dont need heads to run low 12's even, maybe even high 11's.

stock for stock, the LT1 would win. but with the bolt ons done to each car, the GTP would win

 

Yes the LT1 would waste a stock GTP and a good tune L98 Iroc would beat a stock one too. With mods, bets are out the window.

~Matt

 

Modded GTP's can run 13's as mentioned above. 99% of them out there though still run high 14's or so. A stock LT1 with nothing more than a full exhaust in a 3rd gen can run 12.99.

 

really? Thats pretty cool, but i estimate my power at 260-270hp and i run like 13.9 so is 30hp gonna get me 12.99? if so thats kick ***

 

your estimate maybe a little off on yours

 

dont come to michigan though, 99% of the people on this board would get beat by 99% of the GTP's here

 

what do you think i am making. 230hp stock on motor as from factory. mods in sig, including gutted airboxes and fresh plugs and wires LOL

 

I kinda doubt the headers and the muffler picked you up 40hp, but I'm not extremely knowledgeable with those engines. With your headers being shorties, you will have gained less hp than if they were long tubes. I would guess you probably picked up in the neighborhood of 25hp. Remember, if we all gained what the aftermarket tells us we'll gain, we'd all have 700hp cars. You may be pushing 270hp, I'm not real sure. I'd say the limiting factor with your ride is the gears. Swap those out for some 3.55s or 3.73s and see what happens. That alone would make a big difference in your ETs, assuming you hook decent. Just my thoughts.

 

yeah, i hear that exhaust and manifolds on TPI cars are real restrictive and figured with TPI airbox gutted out with K/N's and 3inch catback, and hooker shorties and y pipe that i gained 35hp to put me into the 265 region.

I would hope that that's what it is. i figure 10 from catback 15-20 from headers and another 5 maybe 10 from air intake mods (includes gutting out the box, K/N's, and descreen MAF). It feels real strong. I will get some picks of it sometime. LOL Make sense that these engines can breath alot better with good exhaust cuz the stock heads dont flow real good on exhaust side.

I do got 3.27s to go in soon, can't find any 3.45's and 3.70's are alittle too big. 3.27's with 2800-3000stall will be plenty good.

 

I see nothing wrong with the 3.70s. Combined with the low 1st gear in the 700R-4, you'd have nice launching car. Get some BFG DRs. I think you'd be much better with them than the 3.27s.

 

I raced my friends GTP with a smaller pulley and CAI and he beat me by a 1/2 car. All I had was a catback.


But we went from a bad roll for me (35 mph) so I got a crappy downshift. Not to mention I had problems with the car I did not realize then.

 

A full exhaust LT1 motor can make close to 300 at the wheels with a T5/T56. An L98 won't be near that.

 

Corvette LT1 is rated 300hp, Fbody 275hp. I hear the LT1 long block is practically the same as the L98 with exception that the LT1 is reverse cooled and cam has bit more lift. Are they underrated, cuz i dont see LT1 full exhaust pushing close to 300 at the wheels. Thats 375ish on motor assuming small %loss in driveline due to T56.

 

The vette and f-bod LT1 are the same. The vette has 4 bolt mains which don't add power and have slightly better exhaust manifolds. They have the same cam, heads and tuning. GM just can't rate them the same. Any LT1 should make 300 at the crank.