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post #1 of 22 (permalink) Old 06-26-2008, 08:44 AM Thread Starter
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PSI recomended for drag slicks

I have a set of MT et drags slicks size 26x8.5x15, just wondering how much psi to run

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post #2 of 22 (permalink) Old 06-26-2008, 08:53 AM
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Thats the exact tire I run.

I run around 15-16 pounds in mine....I could go lower, but I don't need too.


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post #3 of 22 (permalink) Old 06-26-2008, 12:05 PM Thread Starter
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do they hook good? I am afraid they may hook too good and my suspension will be on the ground. When you take the light, do you stomp it from idle, or do you hold the rpms at any certain range? I was told i need to stomp it from idle to flash the converter. I'm new to drag racing, so I don't know nor do I know what that means. Thanks, BB

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post #4 of 22 (permalink) Old 06-26-2008, 12:42 PM
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They hook great!

I run a little diffrent setup than you....meaning, I run a 351W and a C6 tranny, but they are otherwise stock.
I still run a stock driveshaft.
I also run 4.10 gears with a track lock.
I have a stock torque converter, which has around a 2000ish stall.

I can stall and hold it at about 2200ish RPMs.
When the light goes green, I then stab the throttle.
I've made about 4 or 5 passes so far, and everything is good so far.

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post #5 of 22 (permalink) Old 06-26-2008, 08:57 PM
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If you're new to slicks, I'd recommend starting out around 20 psi in each tire. That will reduce the top end "sway" that you feel on a bias-ply slick. Try dropping 1 psi each run, until your 60' times stop dropping. The idea is to run as much pressure as possible, while still netting the best 60' times possible. Every car is a little different. I've found that running around 18.5-19 psi works best for me in my XR7. I'm running 28x11.50-16 ET Streets on it.

-Rod

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post #6 of 22 (permalink) Old 06-30-2008, 09:38 AM Thread Starter
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I did not realize how much of a difference these slicks would make, but wow, I could not believe it. These things hook. It made my slow car feel like a race car.I was running on an 1/8 mile track and my et's have been in the high 9's, low 10's, but mainly in the 9.86-9.93 range. Although the tires did not make it faster, they enabled me to be the first finish a few times when I was lined up against a faster car.My best reation time was a .0021 on a deep stage. Everytime I deepstage, my et goes up. My deep stage et was 10.12 compared to 9.9's when I dont deep stage. I am still new to drag racing and i have a coach who is running an Altered '23 T-Bucket who frequently visits the finals, so i am sure I can get better. I now need some speed.

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post #7 of 22 (permalink) Old 06-30-2008, 05:33 PM
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Quote:
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Everytime I deepstage, my et goes up. My deep stage et was 10.12 compared to 9.9's when I dont deep stage.
That's because you're reducing your rollout by deep staging.

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post #8 of 22 (permalink) Old 06-30-2008, 06:04 PM
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...but your RT should be better.

Some high HP guys often run 7-9psi




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post #9 of 22 (permalink) Old 07-01-2008, 02:59 AM
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in my notch i was running a 28x10.50 at around 9-11 psi. car was squirrley going down the track, but I got the best times depending on the track i was at. Deff do like racecougar said, start around 18-20 and drop a psi or two untill you find the best psi for the car.
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post #10 of 22 (permalink) Old 05-19-2009, 01:32 PM
 
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Quote:
Originally Posted by Bradley Blaze View Post
I have a set of MT et drags slicks size 26x8.5x15, just wondering how much psi to run
stock rims??
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post #11 of 22 (permalink) Old 05-19-2009, 02:16 PM
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stock rims??
yes, they fit on stock rims.

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post #12 of 22 (permalink) Old 05-19-2009, 02:18 PM
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Here they are on stock rims(best pic I could find at the moment...)


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post #13 of 22 (permalink) Old 05-19-2009, 02:25 PM
 
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can you go any bigger??
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post #14 of 22 (permalink) Old 05-19-2009, 02:37 PM
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can you go any bigger??
I think 9 inches wide would be pushing it, as factory 15's are only 6.5 inches wide.
these that I run are 26x8.5, and are pretty hard to break loose.
How much power are you making?

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post #15 of 22 (permalink) Old 05-19-2009, 02:49 PM
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Since we're talking slicks... are used slick or drag radials still better than street tires such as Pirelli P-Zero's?

I just can't see spending $300+ for a pair of tires that might get used once or twice a year.

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post #16 of 22 (permalink) Old 05-19-2009, 02:56 PM
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Originally Posted by 94 Daily Driven 4.6L View Post
Since we're talking slicks... are used slick or drag radials still better than street tires such as Pirelli P-Zero's?

I just can't see spending $300+ for a pair of tires that might get used once or twice a year.
sure.....I ran on a set of VERY used drag radials, and they cut my 60's by .2.
So, if you can find a set say for $100 bucks, get em....and as long as they are not all dry rotted and what not.

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post #17 of 22 (permalink) Old 05-19-2009, 03:11 PM
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Quote:
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sure.....I ran on a set of VERY used drag radials, and they cut my 60's by .2.
So, if you can find a set say for $100 bucks, get em....and as long as they are not all dry rotted and what not.
Cool! I'm going to do my very best to get the LSC up to IN for the '09 SC Shootout and I would really like to at least hook up ONCE so I know what it feels like!!!

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post #18 of 22 (permalink) Old 05-19-2009, 03:21 PM
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Cool! I'm going to do my very best to get the LSC up to IN for the '09 SC Shootout and I would really like to at least hook up ONCE so I know what it feels like!!!
last year(damn, its been over a year since I've gone down the track) in April, I ran on my slicks for the first time.....I also went from a 3.08 open rear to a 4.10 track lock, and holy crap, it kinda scared me when I launched(1.88 60'......not that great).....its definatley fun!

I bet you could borrow someone's tires for a pass or 2

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post #19 of 22 (permalink) Old 05-19-2009, 08:23 PM
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I would recommend starting around 20 psi and dropping if your still spinning. Most lower horsepower cars without lower gears and/ or a stall converter arent going to help a ton in the et game.

Before i get flamed....Starting at a higher psi is safer especially if your newer to slicks. Things can get interesting at the 1/4 mile at 12-14 psi. Just my experience.
ALso if you have no power or gearing you dont need the bite and your car will likely stall.

One things slicks do help on lower powered cars is consistency. Obviously as you add power you will want better tires.

In my opinion slicks are the only way forward. It provides a solid base to judge gains from since traction isnt the deciding factor.

Used slicks can work good....just depends on how used.

For the record....i run 28x9 hoosier slicks on my car and they fit/ work great.

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post #20 of 22 (permalink) Old 05-19-2009, 09:00 PM
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can you go any bigger??
28x11.50-16's on stock 16x7's.


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post #21 of 22 (permalink) Old 05-20-2009, 12:35 AM
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i run 12psi in mine. im running 26x10 on a 8" rim

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post #22 of 22 (permalink) Old 07-09-2009, 07:55 AM
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Quote:
Originally Posted by racecougar View Post
If you're new to slicks, I'd recommend starting out around 20 psi in each tire. That will reduce the top end "sway" that you feel on a bias-ply slick. Try dropping 1 psi each run, until your 60' times stop dropping. The idea is to run as much pressure as possible, while still netting the best 60' times possible. Every car is a little different. I've found that running around 18.5-19 psi works best for me in my XR7. I'm running 28x11.50-16 ET Streets on it.

-Rod
Couldn't have said it better.
JL

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