overpowered Z06
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Instructor
Joined: May 2013
Posts: 111
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From: Dixon Il
overpowered Z06
I have been working on a build for the past three years in making my 2002 Z06 a high powered out run everything car! Well I have what I wanted and now I don't know what to do with it? It is an LSX 447 with an F1X pro charger that puts over 1000 RWHP to the ground and it is totally un useable! Don't get me wrong it is a blast to drive but I have absolutely no traction and this thing will get away from you in a heart beat. The first three gears are totally useless all it does is spin! The power comes on so fast that it hits the rev limiter before I can let off the gas. I can be driving in fourth gear and hit the throttle and it spins the tires! I have MT drag radials on the stock rims 305x40x18 with 15 pounds of air. I know I need a larger diameter tire on a smaller rim but even with that I don't think it would help much? I would like to get some feedback on this if you don't mind? Please no smart *** comments. Thanks
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
As you've discovered, making the power is only part of the equation. If you want to hook, you're going to have to make moves to make it happen and you know that's going to involve spending money. Lots of give and take here.
15" conversion, widened fenders, a better, taller tire, better shocks, control arm bushings, the alignment and shocks dialed in properly.
These are the items to start with.
15" conversion, widened fenders, a better, taller tire, better shocks, control arm bushings, the alignment and shocks dialed in properly.
These are the items to start with.
Melting Slicks
Joined: Jul 2004
Posts: 2,844
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From: Northern Ireland
It could be a case of trying different tyres to see what works best for you, and the roads etc you're on.
What trans ? gearing ?
You could re-tune to make power delivery a little softer ?
What trans ? gearing ?
You could re-tune to make power delivery a little softer ?
Thread Starter
Instructor
Joined: May 2013
Posts: 111
Likes: 13
From: Dixon Il
Overpowered
It is a six speed t-56 stock gearing. It doesn't matter what the road surface asphalt is worse concrete a little better. I am hearing someone makes a conervsion kit to go to a 15 inch rim but not quite sure who makes it and what is involved with it? I may have to do a little research and find out?
Thread Starter
Instructor
Joined: May 2013
Posts: 111
Likes: 13
From: Dixon Il
overpowered
You are right I was concentrating al of my efforts on the horsepower, torque and not taking much consideration about the other issues? I honestly didn't think it would be so uncontrollable? I have ridden in fast cars before but this one is insane! The power comes on so fast and brutal you just can't imagine! One second you are ok and the next you are out of control, traction wise!
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
It is a six speed t-56 stock gearing. It doesn't matter what the road surface asphalt is worse concrete a little better. I am hearing someone makes a conervsion kit to go to a 15 inch rim but not quite sure who makes it and what is involved with it? I may have to do a little research and find out?
Banned Scam/Spammer
Joined: May 2007
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From: Machineguns, because I don’t compromise
C6 zr1 transmission gearing is taller than your m12 especially 1st is to help with traction.
Maybe consider a taller rear diff gear as part of the plan to take some of the bite out. Regardless 1k rwhp is a hard beast to tame.
Maybe consider a taller rear diff gear as part of the plan to take some of the bite out. Regardless 1k rwhp is a hard beast to tame.
Burning Brakes
Joined: Nov 2010
Posts: 1,112
Likes: 62
From: Chicago IL
I hate to even mention it, but I would pull about 200 hp out of it to help it be more manageable on the street. Then start going the 15” wheel conversion so you have better tire options. I’m currently just short of 700 to the tire and I can stick just about every pony to the ground. That’s essentially a 10.0 second pass on the street. I’m using a Hoosier Drag radial 295-50-16. Looks close to a full slick.
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Burning Brakes
Joined: Nov 2010
Posts: 1,112
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From: Chicago IL
He’s running a large ProCharger. I don’t believe you can control the boost on a supercharged application like you can a turbo.
Race Director
Joined: Dec 1999
Posts: 10,230
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From: Alexandria, Virginia, USA VA
ahh the joys of too much is just enough
you can control boost with boost by speed and boost by gear
since the supercharger is more linear it's actually easier in some ways
folks have successfully used a controlled waste gate to vent boost
I went with turbos which makes this easer
definitely consider going with 3 things
taller gears in rear or tranny
streetable drag radials (mickeys)
17 to 15 rear rims
I found the 17 was a "happy medium for me as I could get 315 hoosiers and not have to swap spindles
also some tuning with the shocks will do quite a bit to help the vette plant
don't reduce HP, increase the hook so you can book
you can control boost with boost by speed and boost by gear
since the supercharger is more linear it's actually easier in some ways
folks have successfully used a controlled waste gate to vent boost
I went with turbos which makes this easer
definitely consider going with 3 things
taller gears in rear or tranny
streetable drag radials (mickeys)
17 to 15 rear rims
I found the 17 was a "happy medium for me as I could get 315 hoosiers and not have to swap spindles
also some tuning with the shocks will do quite a bit to help the vette plant
don't reduce HP, increase the hook so you can book
Melting Slicks
Joined: Jul 2014
Posts: 2,356
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From: Virginia
Tech Contributor
Joined: Apr 2007
Posts: 10,924
Likes: 78
From: Forney Texas
Running wastegates on a centrifugal system doesn't come without its issues. It would be much more popular if it worked better.
There's always the good ole throttle to help control the power from gear to gear. A Haltech Elite would allow you to dial in each gear's fuel, timing and allowable throttle or control the wastegate if you decided to go that route.
There's always the good ole throttle to help control the power from gear to gear. A Haltech Elite would allow you to dial in each gear's fuel, timing and allowable throttle or control the wastegate if you decided to go that route.
Premium Supporting Vendor
Joined: Oct 2004
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From: Providing the most proven supercharger kits for your C5/6/7 609-752-0321
We used wastegates on a bunch of supercharged cars, works great.
The key is to use a very small waste gate, it is releasing a lot less air than a turbo would. If you use a larger wastegate, or a standard turbo sized WG, then it's harder to control it.
OP, go with the 15" spindle kit and a 275 Pro tire. Boost by gear and those and you will be able to flat foot all gears. Not sure what computer you're using, but many of those features including traction control come with most of the aftermarket ECU's now.
The key is to use a very small waste gate, it is releasing a lot less air than a turbo would. If you use a larger wastegate, or a standard turbo sized WG, then it's harder to control it.
OP, go with the 15" spindle kit and a 275 Pro tire. Boost by gear and those and you will be able to flat foot all gears. Not sure what computer you're using, but many of those features including traction control come with most of the aftermarket ECU's now.
Burning Brakes
Joined: Nov 2010
Posts: 1,112
Likes: 62
From: Chicago IL
I hate to even mention it, but I would pull about 200 hp out of it to help it be more manageable on the street. Then start going the 15” wheel conversion so you have better tire options. I’m currently just short of 700 to the tire and I can stick just about every pony to the ground. That’s essentially a 10.0 second pass on the street. I’m using a Hoosier Drag radial 295-50-16. Looks close to a full slick.
Holley EFI
Davis Traction control
Full Mensor coilovers
LG 15” spindles
15 x 12 double beadlocks
275 pro drag radial
Team Z scaling
That should get you started.
Thread Starter
Instructor
Joined: May 2013
Posts: 111
Likes: 13
From: Dixon Il
Thanks
I just talked with LG on a set of drag spindles for the rear so I can get the 15 inch rims on. I an also looking at a set of axles, along with a driveshaft. The drive shaft I am looking at doesn't have any of the couplers in it? I am wondering jus how that will affect the drive train? The couplers are supposed to remove any dynamic motion in the drivetrain from what I have read? I am gonna have to bite the bullet and invest more money into the car! I just had the tranny rebuilt but the rear is all stock.
I had 800 RWHP with my old setup and it was a handful but manageable? I should have left well enough alone? The wife said what the hell are you gonna do with all that HP? I should have listened to her?
Again thanks for your input I appreciate it!
I had 800 RWHP with my old setup and it was a handful but manageable? I should have left well enough alone? The wife said what the hell are you gonna do with all that HP? I should have listened to her?
Again thanks for your input I appreciate it!
Instructor
Joined: Jul 2009
Posts: 164
Likes: 10
I had the same issue before with my TT C5Z06
the solution as follow:
1- C6Z06 or ZR1 transmission for the taller 1-2-3 gears
2- 15" conversion with M&H 325/50/15 tires
3- ZR1 sway bar in the rear
4- Coil overs
5- good balance including moving the battery to the trunk
the solution as follow:
1- C6Z06 or ZR1 transmission for the taller 1-2-3 gears
2- 15" conversion with M&H 325/50/15 tires
3- ZR1 sway bar in the rear
4- Coil overs
5- good balance including moving the battery to the trunk
Safety Car
Joined: Mar 1999
Posts: 3,603
Likes: 170
From: Toronto, Canada
I currently have the same items as you:
-15" conversion with 275 pro tire
-Viking coilovers
-zr1 rear sway bar
My car blows the tires in 3rd gear. I even took out over 100rwhp and only pushing around 800 now. I don't know how some guys are able to plant more
Team Owner
Joined: Jan 2007
Posts: 29,063
Likes: 1,839
From: cookeville tennessee
ttt
It is like Brett said above 15inch with 275 pro, then getting coilovers with correct springs. gearing with all the other he said.
But here from me doing this same thing it would be better for you to do only one thing to the car at a time, then text then work on the next set up.
If you do 3 are 4 diff things at one time & the car does worse just to hard to back track to work at which one you need to work on.
Plus if going to a 15 with 1,k to 1300 rwhp go with the weld bead locks in the rims. Those tires at that rwhp will spin a lot on the rim.
But here from me doing this same thing it would be better for you to do only one thing to the car at a time, then text then work on the next set up.
If you do 3 are 4 diff things at one time & the car does worse just to hard to back track to work at which one you need to work on.Plus if going to a 15 with 1,k to 1300 rwhp go with the weld bead locks in the rims. Those tires at that rwhp will spin a lot on the rim.