ZR1 Chief Engineer: "GT-R won't be king of the ring for long"

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Originally Posted by JITB

Oh ok, i agree with that statement tho...

I will say this.. without sounding like a fanboy. I dont really see the Zr1 being pushed to beat the gtr's record. In stock form. but i really dont know much on the zr1's suspension upgrade from the z06. i mean an extra 150+hp requires more than a stiffer spring adjustment especially for the ring.

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I see it this way, if Chevy went out of there way to make the ZR1 as fast as these insane #'s being made by the GTR. It will lose some of it's true driver aspects. The more electronics, the less fun the car. No matter how fast it is.

Remember the ZR1 gives you a 6-speed with a clutch. Allot of people cant give that up. Why else do all Porsche's give you a 6?

The GTR is like a Pentium Processor......the latest and greatest.

The Vette is like a basic calculator. So simple yet we still use it.

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Originally Posted by nsany(atl)

lol X 10, the Vette runs a transverse leaf spring suspension just like the Model T. It's real advanced.

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so your saying that its better to have suspension that pushes up on the fram of the car and causes it to flex than suspension that puts little stress on the frame? ooooookay...

i think if coilovers were better, they would have ran them on the c6r. but they didnt.

and about the tires, the gtr was NOT on stock tires, it was on race tires.

they will be sorta close, but the c6r will be alot faster around the ring. that track is won and lost on the straights, and the c6r has more power and less drag. plus it weighs ~500 lbs less.

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Originally Posted by nsany(atl)

lol X 10, the Vette runs a transverse leaf spring suspension just like the Model T. It's real advanced.

Pic from Z06

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I don't know how i missed this.

Lol at really advanced. It was "advanced" in the 60's and then the 70's happened.

Corvette > GTR all day long

does anyone have the specs on the spec-v?because thats what the arguement was truely about, the zr-1 being promoted as beating any production car and nissan laughing because of the amazing times cut with a regular gtr.

as far as the arguement that the gtr has all the drivers aids, do you think chevy is putting some guy off the street driving the zr1?no. so that has no bearing on the times.

as far as price, the zr1 is said to be 100k from chevy(both motor trend and road and track) and the stock gtr is 68k so expect 80-90k for the spec-v.

all and all, i think the zr1 will have no problem beating the regular gtr around the track. i cant make an opinion on the spec v.

regardless, the new gt2 pwns all.

good stuff in here

I vote Vette. F all the nay sayers.

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Originally Posted by EJ25RUN

I don't know how i missed this.

Lol at really advanced. It was "advanced" in the 60's and then the 70's happened.

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as much as you seem to know about this kind of stuff, im surprised by this.

the transevers leaf is a BETTER DESIGN than a coilover. coilovers = chassis flex. thats not a good thing. the leaf spring deflects most of its force onto itself in the center of the car, which causes ALOT less chassis flex. you can brace the shock towers on a coilover car, but thats adding weight, which the leaf already has less of. the leaf spring deflects most of its force onto itself in the center of the car, which causes ALOT less chassis flex.

this is goin to be good

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Originally Posted by jesse4846

as much as you seem to know about this kind of stuff, im surprised by this.

the transevers leaf is a BETTER DESIGN than a coilover. coilovers = chassis flex. thats not a good thing. the leaf spring deflects most of its force onto itself in the center of the car, which causes ALOT less chassis flex. you can brace the shock towers on a coilover car, but thats adding weight, which the leaf already has less of. the leaf spring deflects most of its force onto itself in the center of the car, which causes ALOT less chassis flex.

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you have no clue what you are talking about.
They ran stock Bridgestones, watch the first 40sec. of this Nissan Promo video and you can see them on the car.
http://www.youtube.com/watch?v=uGe_fyhQazg
also slick tires don't scream like that, it is the grooves in the tires that make the noise, slicks don't do that.

The Vette is the only car that still runs the transverse setup, the General just likes it that way, just like pushrod V8's. Also with the transverse leaf you can't change spring rates with out removing the whole suspension and it's hard to adjust ride height.

And the Pratt and Miller race cars "the C6-R you spoke of" got rid of the leaf springs and ran coilovers, so that tells you how good it is.

http://prattmiller.smugmug.com/photo...68_cmFZm-L.jpg
http://prattmiller.smugmug.com/photo...11_hkvpE-M.jpg

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Originally Posted by jesse4846

as much as you seem to know about this kind of stuff, im surprised by this.

the transevers leaf is a BETTER DESIGN than a coilover. coilovers = chassis flex. thats not a good thing. the leaf spring deflects most of its force onto itself in the center of the car, which causes ALOT less chassis flex. you can brace the shock towers on a coilover car, but thats adding weight, which the leaf already has less of. the leaf spring deflects most of its force onto itself in the center of the car, which causes ALOT less chassis flex.

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the same amount of pressure is still going to be applied to a point on the vehicle because the same amount of weight is still there.

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Originally Posted by nsany(atl)

you have no clue what you are talking about.
They ran stock Bridgestones, watch the first 40sec. of this Nissan Promo video and you can see them on the car.
http://www.youtube.com/watch?v=uGe_fyhQazg
also slick tires don't scream like that, it is the grooves in the tires that make the noise, slicks don't do that.

The Vette is the only car that still runs the transverse setup, the General just likes it that way, just like pushrod V8's. Also with the transverse leaf you can't change spring rates with out removing the whole suspension and it's hard to adjust ride height.

And the Pratt and Miller race cars "the C6-R you spoke of" got rid of the leaf springs and ran coilovers, so that tells you how good it is.

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i meant to say c5r, my bad. lol

and pushrod motors have advantages. for one thing, theres not as much to break. theres also less rotating mass inside the engine.

as far as changing spring rates, your right. but the shocks are where the most adjustment is used, so as long as the springs are keeping the car from rolling too much, its fine.

the transverse leaf spring still applies pressure along the subframe assembly thats attached to the body, its still requires reinforcement to the body to handle the additional stress just like is done to the shock towers on a coil over setup.

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Originally Posted by green91

the transverse leaf spring still applies pressure along the subframe assembly thats attached to the body, its still requires reinforcement to the body to handle the additional stress just like is done to the shock towers on a coil over setup.

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not nearly as much.



and anybody who says that the gtr that they used at the ring is stock is on drugs. shaved and nitrogen filled tires, non-oe brake pads, weight WAS taken out... etc.

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Originally Posted by jesse4846

as much as you seem to know about this kind of stuff, im surprised by this.

the transevers leaf is a BETTER DESIGN than a coilover. coilovers = chassis flex. thats not a good thing. the leaf spring deflects most of its force onto itself in the center of the car, which causes ALOT less chassis flex. you can brace the shock towers on a coilover car, but thats adding weight, which the leaf already has less of. the leaf spring deflects most of its force onto itself in the center of the car, which causes ALOT less chassis flex.

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If that was the case, we would see it in more applications. The biggest problem of a Transverse Leaf is its size and length. Added to that it doesn't allow for as much adjustment. A double wishbone multi link with coils is much more compact. One thing i want to mention as well is that going back to the Oldsmobile TransAm/IMSA cars and the pikes peak pro trucks P&M did, they have always worked with that setup and you typically stick with what you know works. I feel that GM is sticking with transverse leafs for the same reason they are sticking to pushrod v8s and fibergrlass.

C6r rear multilink with coils.
http://www.supercars.net/gallery/119513/1445/621627.jpg

The RE070 is one of the greatest street tires ever. Maybe you have never driven on a set but its really close to an R compound.

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Originally Posted by nsany(atl)

Well this is the tire setup that the GT-R ran those #'s on, nothing special

BRIDGESTONE POTENZA RE070R

Tire Front 255/40ZRF20 +45
Tire Rear 285/35ZRF20 +25

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Originally Posted by Batlground

The RE070 is one of the greatest street tires ever. Maybe you have never driven on a set but its really close to an R compound.

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i have an STI (its the stock tire) and im on my second set.

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Originally Posted by Batlground

The RE070 is one of the greatest street tires ever. Maybe you have never driven on a set but its really close to an R compound.

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I haven't, but they are still the OEM tire, not "Race Tires" like some people were saying

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Originally Posted by jesse4846

not nearly as much.



and anybody who says that the gtr that they used at the ring is stock is on drugs. shaved and nitrogen filled tires, non-oe brake pads, weight WAS taken out... etc.

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What are you talking about, they are going for the "Production Car" record, everything is as it would roll off the line that is the point of setting a benchmark

I am so happy there is competition between automakers again if finally feels like the late 80s, early 90s again with the RX7, TT 300zx, Cobra, and Supra. Hopefully Mazda and Toyota will catch on. Hoping Mazda will do something with the RX-8.

i agree

7:29 is stupid fast.

But here is a PURE drivers car that did 6:55 - Overall street car record.

Radical lap record ~ Watch at 5:45, i would have sh!t myself.