Help Me Lower My Short Time

[nocooler]

Brad - 28x10.5x15 ET Drags, get the stiff walled ones

P/N 3055S

The 28x9 is only a 27" tire.

http://www.mickeythompsontires.com/strip.php?item=ETDrag

The stiff walls are recommended for heavier cars. The sidewall should last the life of the tire - where the non-stiff you can murder it quickly. Wandering isn't an issues with the stiff walls either - and they don't grow as much.

I'd start @ 12-13psi cold and see how they do. It'll end up 15-16 hot.

Make sure the front and rear suspension doesn't bind and that the transmission yoke splines aren't twisted.

Once the instant center and anti-squat are in the ball park the car will hook on any decent tire. As always make one change at a time and see how the car responds.

[motorhead]

It is pretty simple really, where the car makes power and how it is put to the ground must be in sync.

It is easy to put power down on a soft launch with a so-so suspension set-up; add more power and it begins to show that not everything is working together.  Adding more power is routine, setting up a calculated baseline suspension and then systematically tuning it to the power being made is daunting.

Do the math to calculate your instant centre, anti-squat, and weight transfer rates and you'll be coming out ahead.

[TurboCajun]

I have pulled many 1.50s, 1.51s and a 1.49 , with 100% stock suspension with just air bags and MT ET streets 255/60/15
on foot brake 3000ptc 10" LU. The converter was the biggest gain from 1.65 to low 1.5s and also making sure that is was not rich on the start.

[Steve Wood]

OH, come on, Keith!  you also went 11.0's on a 60 turbo and a stock downpipe!  We all know that is impossible!  I am surprised that the vendors have not taken out a contract on you!

[TurboCajun]

yes Steve and I may be going back to my stock downpipe, and get in the mid 10s, that 3" DP is made " PERFECT"  but doesn't work for me. I will just make another plate to accept the 63mm. 

[Steve Wood]

well, that perfect down pipe will not make boost with two different turbos so not all is perfect no matter how many thousands have been made.  It is strange that the problem is not easily apparent but since the turbos make a ton of boost with a flat plate installed, something is wrong.  Be worth a shot, for sure, to try it with your stock pipe and a plate sized for the turbo hole.

[Scoobum]

Brad - 28x10.5x15 ET Drags, get the stiff walled ones

P/N 3055S

The 28x9 is only a 27" tire.

http://www.mickeythompsontires.com/strip.php?item=ETDrag

The stiff walls are recommended for heavier cars. The sidewall should last the life of the tire - where the non-stiff you can murder it quickly. Wandering isn't an issues with the stiff walls either - and they don't grow as much.

I'd start @ 12-13psi cold and see how they do. It'll end up 15-16 hot.

Make sure the front and rear suspension doesn't bind and that the transmission yoke splines aren't twisted.

Once the instant center and anti-squat are in the ball park the car will hook on any decent tire. As always make one change at a time and see how the car responds.

Thanks Jeremy. I have a pair of 28x10.5's I'm gonna mount up on these lite weight rims...and we'll have a go at it. Price of new slicks up here is insane...so I'll start hunting up a couple pair of used ones again for next year. Gonna pull the air bags and drop the front sway bar...and see how it responds...and then start making changes to the adjustable rear shocks.

[Scoobum]

Jeremy, I went out and checked and the 10.5's I have are the C's. I'll keep and eye out for a pair of S's. Once again...thanks .

[nocooler]

Jeremy, I went out and checked and the 10.5's I have are the C's. I'll keep and eye out for a pair of S's. Once again...thanks .

Brad - those are sport compact tires - don't know how they will work for you.

[good2win22]

The 28x9 is only a 27" tire.

That's an inch taller than what I'm running now.  Never met a guy who would say that he couldn't use another inch....

[Scoobum]

There's a 28x10.5x15C and a 28x10.5x15S. I assume the S relates to the stiff sidewall?

[nocooler]

Correct - the top of this page has all the info:

http://www.mickeythompsontires.com/strip.php?item=ETDrag

[TexasT]

As long as we are adding inches.

http://www.mandhtires.com/M-H-Racemaster-Drag-Slicks/9.0-30.0-15

http://www.performanceplustire.com/products/otherTires/searchType/searchByBrand/productID/5923/subSection/dragTires/dragTireDataID/316

[Tim Hensley]

What dose your time slip look like?
Is a low 1.5 possible at your 1/4 mph and ET

[Scoobum]

6.72 at 104.67. I haven't maxed this turbo out...there's some left in it. 6.5x is within reach...possib ly 6.3x with a hard launch.