[ZRacerLE]

Originally Posted by SFV1LE

Are you running GY SCF1 3Rs? If so, 1 year age is fine as long as you have tread left and they weren't heat cycled out on track by previous owner. If 3Rs with tread, you should have significant advantage in corner exit speeds over G5 ZL1. You also need track camber settings, at least 2.8 degrees front.

The ZLE is capable of incredible corner speeds, better than a track prepped McLaren 12C on GY3R according a guy who did 1:50s at BW in his ZLE, and now tracks a 12C on 3Rs.

https://www.youtube.com/channel/UC0P...XFb3TPAz_nf3wA

OP says he's running 1:37s, but you are saying 1:50s is fast for a ZLE. Is this the same track, but different configuration?

[Juiced1]

Originally Posted by nighttowl

it ran 1:37's all day.

I could have gone a bit faster, but I was on 1 year old tires and had trouble with slides. the 45-55 degree temps did not do me any favors on the corners. The last lap I ran I had a big slide accellerating out of turn 9 at at over 90 mph. at that point I called it a day. Im not interested in wadding up the car; but like to drive fast.

My old ZL1 dynoed 575 rwhp and was a 6 speed also; but was also 400 lbs heavier. exit speed out of 9 was about the same as the old zl1 (between 85 / 95 m[h), but i could only hit 135 / 140 at end of the straight in the 1le. in the old zl1 I would hit 145 / 150. I have no idea what the lap times in the old zl1 were.

More power would help but if you are at a race course you'll want to mod your cooling system first. These cars heat soak so fast an upgraded heat exchanger and a reservoir can help out a ton. Keep your intake temps down and your lap times will come down as well. You can be losing 25-40rwhp quicker then you think from your intake temps pulling timing. A tune can clean this up some too.

[SFV1LE]

Originally Posted by ZRacerLE

OP says he's running 1:37s, but you are saying 1:50s is fast for a ZLE. Is this the same track, but different configuration?

Yes different track. He ran at Willow Springs Big Track, my 1:50 reference was Buttonwillow with the best ZLE time I know of at So Cal tracks.

Equivalent to 1:50 at Buttonwillow would be maybe a 1:28-1:29 at Big Willow. I don't have firsthand knowledge of fast ZLE laps at Big Willow, only Buttonwillow, Laguna Seca, Sonoma, and Auto Club Speedway in Fontana.

[arichards46]

I track (road course) my 2018 ZL1 1LE and am looking for some experience/advice re: tire options. I'm getting about 5 track days out of the factory GY's and I love the tires but I'll go bankrupt replacing them at this rate. Has anyone tried scrubs? If so, who do you get them from and how much are you spending?

Also, if you have switched to another brand for longevity and/or price what sort of success have you had? Have you had to sacrifice handling? Any thoughts at all are welcome guys...and gals, too! :-)

[nighttowl]

Pro racers can get a 1:25 out of the car on this track; which I am not. I have been to big willow over 20 times in the last 20 years; although mostly on motorcycles.

the tires have 6k miles on them. I did not do the track alignment, I did not decide to go until the night before. all that was done was an oil change; which is unusual for me. I usually go all out on my track weekends. normally 2 day events, new tires, everything.
i know it will run through the corners faster, but all im saying is that down the front straight it makes alot of noise - and not alot of "go". I was actually a little dissapointed by that.

[ZRacerLE]

Originally Posted by nighttowl

Pro racers can get a 1:25 out of the car on this track; which I am not. I have been to big willow over 20 times in the last 20 years; although mostly on motorcycles.

the tires have 6k miles on them. I did not do the track alignment, I did not decide to go until the night before. all that was done was an oil change; which is unusual for me. I usually go all out on my track weekends. normally 2 day events, new tires, everything.
i know it will run through the corners faster, but all im saying is that down the front straight it makes alot of noise - and not alot of "go". I was actually a little dissapointed by that.

Must be the drag from the aero? Your stock ZLE has the same power as your last modded ZL1 and is a few hundred pounds lighter. Very weird.

[Markoz28]

I’ve never tracked a car before so driving so I have no real clue what I’m talking about. With that said, if I wanted more power but not more heat, I would port the stock SC, larger 103tb, low side fuel, RF CAI/or even the big gulp, headers, flex fuel, tune. Should pick up a bunch of power and be even more efficient.

[juice3]

There is no good data on the regular SuperCars in the rain from the magazine companies, however, if you ever think your going to get stuck in the rain you cannot go wrong with the P4S.

The regular SuperCars fit in SCCA Sport 1 Class - in case anyone wants to know.

[That1guy_tim]

Originally Posted by nighttowl

Pro racers can get a 1:25 out of the car on this track; which I am not. I have been to big willow over 20 times in the last 20 years; although mostly on motorcycles.

the tires have 6k miles on them. I did not do the track alignment, I did not decide to go until the night before. all that was done was an oil change; which is unusual for me. I usually go all out on my track weekends. normally 2 day events, new tires, everything.
i know it will run through the corners faster, but all im saying is that down the front straight it makes alot of noise - and not alot of "go". I was actually a little dissapointed by that.

sounds like you need more seat time instead of moooo powwwaaa

[ZRacerLE]

Originally Posted by That1guy_tim

sounds like you need more seat time instead of moooo powwwaaa

moe powa baba

[MikeEM1]

Originally Posted by nighttowl

it ran 1:37's all day.

I could have gone a bit faster, but I was on 1 year old tires and had trouble with slides. the 45-55 degree temps did not do me any favors on the corners. The last lap I ran I had a big slide accellerating out of turn 9 at at over 90 mph. at that point I called it a day. Im not interested in wadding up the car; but like to drive fast.

My old ZL1 dynoed 575 rwhp and was a 6 speed also; but was also 400 lbs heavier. exit speed out of 9 was about the same as the old zl1 (between 85 / 95 m[h), but i could only hit 135 / 140 at end of the straight in the 1le. in the old zl1 I would hit 145 / 150. I have no idea what the lap times in the old zl1 were.

You have to factor in gearing as well when it comes to mph. Driver mod is needed for faster times, not hp. I ran 1:32.2 at Big Willow my second time there and I'm not fast by any means.

[nighttowl]

Originally Posted by ZRacerLE

Must be the drag from the aero? Your stock ZLE has the same power as your last modded ZL1 and is a few hundred pounds lighter. Very weird.

This is what I am thinking.
that or I need more octane and timing was pulled?
I ran 91 in it..

Im not concerned with the lap times; every single lap involved a pass, or wait on another driver (pass only on straights).

10 mph lost down the front straight at the same track with the same driver and exit speed in a lighter car (with a slightly higher power to weight ratio) doesnt make sense to me.

im kind of thinking I should dyno it.
I would think it should be around 530 at the wheels stock?

[ZRacerLE]

Originally Posted by nighttowl

This is what I am thinking.
that or I need more octane and timing was pulled?
I ran 91 in it..

Im not concerned with the lap times; every single lap involved a pass, or wait on another driver (pass only on straights).

10 mph lost down the front straight at the same track with the same driver and exit speed in a lighter car (with a slightly higher power to weight ratio) doesnt make sense to me.

im kind of thinking I should dyno it.
I would think it should be around 530 at the wheels stock?

No, I believe dyno stock should be 560 to 570. I wonder if it's the 91 octane and timing pulled at high temps. Maybe someone who knows better will chime in about that...

[SFV1LE]

Originally Posted by ZRacerLE

No, I believe dyno stock should be 560 to 570. I wonder if it's the 91 octane and timing pulled at high temps. Maybe someone who knows better will chime in about that...

I mentioned this in an earlier post... the car IS tuned for 93 and Ted Jannetty tested the difference and I think he found a 25+ WHP difference. I add about 4 gallons of 100 at the track to avoid knock (especially on hot days), and get maximum power