ZL1 (formerly TT 1LE) Vs Mustang 5.0 (formerly Supercharged)

[Fraxum]

Originally Posted by JackalopeZL1

I have not heard what he found today as far as low pressure, but you are right on stock tires and what a set of DR's do.. Do you have any under hood shots of your car with the twin turbos? Edit found your build

Not much to see under the hood. I like it that way. Some of the subtle give-aways are the huge air to air intercooler, the low thick flow tubes and the vacuum line snaking towards the back.

[Fraxum]

Last night was fun. The South Jersey Camaro club came down and there were 6 or 7 Camaro 5th gens in the lanes battling the Mustangs. I think we represented pretty well. But Pat, the two turbo Porsches, and one very quick SRT Jeep were most of the top dogs. Pat was back down to 11.1s by the end of the night. I came nowhere near the 11s with clutch problems and poor launches.

Pat and I did run once at the end of the night. I must have lined up off the tire line and blew off the tires on the launch. Then I got a little sideways hitting second, so I backed off and ran a 13.0 to Pat's 11.1. I am sure I made the track staff nervous with the Gamblers needing one more run. A BMW V8 M3 hit the wall hard earlier in the night.

[87GNX]

Maybe let ole pat drive your car and see what he pull out of it?

[Fraxum]

Originally Posted by 87GNX

Maybe let ole pat drive your car and see what he pull out of it?

We have tried that, but Pat is afraid of messing up my car. While he can drive a manual pretty hard, he runs 13s in my car. When I drive his car I am a tenth or two off of his time.

I think though @ 6 pounds mid 11s is all I can expect without a two step. If I want to go 10s I need around 10-11 pounds.

My problem is now my clutch. If I want to launch into boost it takes a bit of clutch slipping and now my stock clutch gives up right away. I want to get a clutch, but I can't find a reasonably priced one that will work for a 10-11 PSI power level. The consensus is a $2,000 Street Slayer Twin Carbon will work best, but if i turn up the boost more I will need an even more expensive one.

Edit: I did let Pat drive the 1LE and he flipped it shiny side down at Millville, NJ on the lightning track. Letting a Mustang guy drive a fast Camaro is not a wise move.

[Unreal]

Mantic 9k is a great option too for ~$1500.

[Fraxum]

Originally Posted by Unreal

Mantic 9k is a great option too for ~$1500.

Thanks! I will look for that one.

[Col. Brain]

Originally Posted by Fraxum

Agreed about sportsmanship, it was just a fun thing. The fans wanted to see the Porches get beat. Heads up the $125,000 cars will win. And both times the Mustangs turned on both lights first before the Porches got to the lights.

I always try to pre-stage and wait as my burnouts are short. But every once in a while I mess up going too fast to the line. Still not as bad as the time I staged with my back wheels. That was early on, but DOH!

Gotta start somewhere.

And at least you are out trying it. I hear enough talk from people bench/magazine racing who have never even been to the track.

Id say for your car - get the suspension/clutch figured out. 700whp was enough to get the ZL1 into the 9s. Twins on an LS3 should laugh at 700whp.

Get that car to leave properly and you will see major drops in that ET.
The mph screams 10s

[Fraxum]

Originally Posted by Col. Brain

Gotta start somewhere.

And at least you are out trying it. I hear enough talk from people bench/magazine racing who have never even been to the track.

Id say for your car - get the suspension/clutch figured out. 700whp was enough to get the ZL1 into the 9s. Twins on an LS3 should laugh at 700whp.

Get that car to leave properly and you will see major drops in that ET.
The mph screams 10s

Turbo 1/4 MPH is deceiving and not directly applicable to SC cars.

I wish I had LSA internals. And I am not sure I can get to the 1.6 60's with my current setup. 1.7nn is my best. But I sure will try. Good air helps my launch. This has been verified.

I know I can get to 700 rwhp, but at that point with a stock LS3 lower end things are getting risky even with a less engine stress turbo. I am hoping after I get my fueling sorted out to be around 600+. Given the way my car runs as near as I can figure out I am making around 525 rwhp or a little more in good air. With a lighter car I might get close, but my car is probably around 4,000 pounds without me.

If I ever do tank my engine I would like to build a stroker LS3 with a stout bottom end and a turbo friendly cam. That would be fun.

[Fraxum]

Good night at Atco last night. Although the place was empty. I ran an 11.749@117.13 with a 1.757 60'. My clutch was holding up. The night I was have overheating problems a guy in the lane asked me how full is my clutch reservoir? He said if it is too full, when the fluid overheats it will press against the lid and cause slippage. And I did over fill it that night. I change out the reservoir fluid each time I go to the track and now I will make sure I do not overfill.

Pat and I did not run last night. Pat spent most of his time watching to let his car cool or so he said. He did get his best run ever (still 11.1 something) but really I think there was no one there for him to run.

But for me I hit the jackpot at the end of the night. I was running an AWD Eclipse running high 11s. The first time we ran he was a little lazy at the light. He jumped ahead (naturally) as I ran my usual 2.0 60' bog, but I caught him right before the lights. I won by .0661. Close! But to confess I redlighted with a -.015. But I did really beat him thanks to his .313 RT. I ran 12.084@121.68 an he a 11.822@118.43.

Besides the fun race the cool thing was this guy (forgot his name) was the best man at the wedding of the guy who runs AGP. So right after the race he texted him that he just got beat by one of his AGP Camaro kits.

After that we raced again. This time he cut a .106 RT and jumped out way ahead even though I cheated a little and did a -.158 light. So I spent the rest of the track running him down. I almost got him. He must have beat me by a bumper. His win was by .0036. As close as it gets. I am glad he won considering my even bigger red-light. I really wasn't trying to red-light as I sometimes do when running a much faster car, I just got a little too excited I thinK knowing the race would be close. In this last race he ran 11.708@118.96 to my 11.975@122.47. That is one fast little Mitsu! I hope I get a chance to run him again.

[JackalopeZL1]

Have you ever played with your rear tire pressures? Seems like I read you are running 30psi?

[Fraxum]

Originally Posted by JackalopeZL1

Have you ever played with your rear tire pressures? Seems like I read you are running 30psi?

Yes, still 30 PSI. But if the track is well prepped and I line up on the right spot I do not get much or any spin. Usually I bog. All my 1.7n 60' times were at 30 PSI. If I can start getting 1.7s all the time I will start playing with tire pressure and perhaps better tires.

I get my good 60's in good air. My theory is if the air is not good and I cannot pedal the launch with a little boost, I have too much tire for what is essentially a completely stock LS3. Looking at my dyno curve overlay going back to stock manifolds from LTs I lost some power down low.

Trying to figure out possible turbo 1/4 mile times by MPH is not the same as NA or SC cars. Turbo MPH is usually higher. I think at my boost level mid 11s is about the best I can do. In really good Atco air I think I can get to 11.4-5. This was my original goal with my street boost level.

I think I would be faster @ 6 pounds with smaller turbos, as they would spool faster. But I do not want to spend $2,200 to find out I am wrong. Right now my theoretical RWHP limit is 950. With the smaller ball bearing turbos it would be 800. Since I do not yet want to build my LS3 to take big HP it is a moot point.

[Unreal]

Uhhh, that is a HUGE issue. Drag radials aren't meant to be run at that pressure. You need to drop them to 16-20psi depending on track conditions. Dropping the tires to 18psi, a nice burn out and launching at 4500+ rpm could easily be 1/2 a second.

[Unreal]

Uhhh, that is a HUGE issue. Drag radials aren't meant to be run at that pressure. You need to drop them to 16-20psi depending on track conditions. Dropping the tires to 18psi, a nice burn out and launching at 4500+ rpm could easily be 1/2 a second.

[JackalopeZL1]

Yep.. what he said.. you should be able to fully flog it with drag tires from a stop.. do some experimenting.. last time I was at the track there was a boss mustang who before could not get a good launch for beans on stocks tires..He put on some drag radials and was doing darn near rev limit launches and dropped his 60' from 2.2 to 1.6 in one run.