Z/28 Car and Driver Lightning Lap Results!

[Sven59]

My bad I was thinking the 1LE was staggered like the ZL1.

[Spoolin]

Originally Posted by Orange Crush 1LE

Staggered wheel widths really helps balance these front-heavy Camaros! The 1LE would benefit from a more aggressive alignment when running Trofeo Rs, but even without this would be much faster.

Is that due to stretching the rear tires when compared to the fronts. There was a thread that touched on the slightly reduced traction from stretching a tire but also making it stiffer.

I've learned alot about tires while on this forum. Last year I bought some MPSC2 for my race truck simply because I needed traction and figured 345's would do the trick out back(285's on the front), now I'm more curious to see how differently she handle's due to "tire tuning".
The wheels on the truck are Front 20x10.5 & Back 20x12, not sure if the back 345's are stretched on that rim, I don't think so though.

[Doubleblank]

Originally Posted by Orange Crush 1LE

Both the Z/28 and 1LE benefit from same-size tires front and rear, but staggered wheel widths. So at least for the 1LE Vs. Z/28, I don't think you'd need much suspension tuning to optimize for Trofeo Rs. I kept with the same theme and run 315s front and rear on 18x11 front and 18x12 rear. Staggered wheel widths really helps balance these front-heavy Camaros! The 1LE would benefit from a more aggressive alignment when running Trofeo Rs, but even without this would be much faster.

Matt "Dropspeed" ought to be able to give us his impressions of a 1LE with Trofeo Rs. Looking forward to his track reports, I will put more weight in Matt's impressions than on this MT test.

Just for kicks, I may try running 315s in the front and 335s in the rear on my next set of Hoosiers. John of CCW said it's the best set up for a winged car. It'll be fun to see what happens to lap times.

I'm running 315/335 Toyo R888s 18in on my SS. Full Pfadt racing suspension. 600/600 rwhp. My lap times are still faster in my Z28. More balanced exiting corners and I haven't found a way to keep the SS from understeer with this set up.

[2cnd chance]

Originally Posted by Doubleblank

I'm running 315/335 Toyo R888s 18in on my SS. Full Pfadt racing suspension. 600/600 rwhp. My lap times are still faster in my Z28. More balanced exiting corners and I haven't found a way to keep the SS from understeer with this set up.

Now that's impressive.

[Orange Crush 1LE]

Originally Posted by Spoolin

Is that due to stretching the rear tires when compared to the fronts. There was a thread that touched on the slightly reduced traction from stretching a tire but also making it stiffer.

I've learned alot about tires while on this forum. Last year I bought some MPSC2 for my race truck simply because I needed traction and figured 345's would do the trick out back(285's on the front), now I'm more curious to see how differently she handle's due to "tire tuning".
The wheels on the truck are Front 20x10.5 & Back 20x12, not sure if the back 345's are stretched on that rim, I don't think so though.

Yes that rings a bell. I just know that it works well, and if it works don't fix it, LOL.

It'll be interesting to see how the new MPSCs do, I suspect they will kick ass. Keep me posted.

[Orange Crush 1LE]

Originally Posted by Doubleblank

I'm running 315/335 Toyo R888s 18in on my SS. Full Pfadt racing suspension. 600/600 rwhp. My lap times are still faster in my Z28. More balanced exiting corners and I haven't found a way to keep the SS from understeer with this set up.

Wow this is interesting. I would have thought you could beat the Z/28. I think mine would beat the Z/28 especially with my big aero, but I haven't done an A B comparo on the track to verify. just goes to show that GM really nailed it on the Z/28.

I don't have issues with understeer, my Camaro turns in quite well. Very balanced.

I think I'll stick with 315s front and rear, thanks for the info.

[brt3]

Originally Posted by Doubleblank

I'm running 315/335 Toyo R888s 18in on my SS. Full Pfadt racing suspension. 600/600 rwhp. My lap times are still faster in my Z28. More balanced exiting corners and I haven't found a way to keep the SS from understeer with this set up.

My questions would be:

1. Which tracks are you using to compare the two cars?
2. What brakes do you have on the SS?

I'm guessing that the Z/28 is shortening the braking window, moving faster at the apex, and carrying more exit speed -- thoughts?

[Spoolin]

Originally Posted by Doubleblank

I'm running 315/335 Toyo R888s 18in on my SS. Full Pfadt racing suspension. 600/600 rwhp. My lap times are still faster in my Z28. More balanced exiting corners and I haven't found a way to keep the SS from understeer with this set up.

Since we're talking about tires...how wide are your rear wheels, not tires but wheels? That video with Al Oppenheimer talking about why they staggered the wheels on the 1LE and the Z/28, so as to stretch the rear tires over the wheels, therefore reducing the contact patch which helped them cure understeer in their cars. I guess it's called "Tire tuning" as opposed to "chassis tuning", but maybe look into that? I figure you have the 335 on there for traction due to the 600/600, so maybe either up the fronts, or stretch the rears like GM did?
Just a thought, not sure how valid of a thought it is though.

[Doubleblank]

The only track I've done a same day - same track is Grand Sport in Houston. Short, technical track with no long straights. I'm guessing at MSR with a couple of decent straights, the SS will win out with the extra hp. Running StopTech BBK on the SS. The brakes and stable platform keeps the Z28 in front on short technical tracks.

[Doubleblank]

The SS turns in fine but when powering out it begins to push. So much traction out back I can't get the rear to swing out a little. Probably need to keep tinkering with my front end settings.

[Mikamaro]

Originally Posted by Doubleblank

The SS turns in fine but when powering out it begins to push. So much traction out back I can't get the rear to swing out a little.

Why aren't you running a square setup like the Z/28 or 1LE?

[Doubleblank]

As to the square setup, I went with our race engineer's and CCW's recommendations.

[Fenderaddict2]

I can't stand haters. This is an impressive car, period. I can only begin to imagine where GM goes from here.

[Mikamaro]

Originally Posted by Doubleblank

As to the square setup, I went with our race engineer's and CCW's recommendations.

Ummm, I thought Engineers were there to apply driver's feedback!
Seems like and easy test to try out...anyway it's your business.

What happen to Alec Udell in his last race?
P.S. Could not have imagine a better scenario for those 2 red cars!