project89

iTrader: (1)

i had a set of hoosiers 26x9x15 but i ended up damaging one of them and my friend gave me the mt's.

he said they are a stiff sidewall slick so they dont buldge out as much as the other ones

ill be mounting these on 15x8 weld draglights,

now my ? is before i take the time to unmount the hoosiers will a 28x10.5 tire fit under the back of 3rdgen with a stock rear? without anything more then cutting the lip on the fender?

AlkyIROC

Maybe. I squeezed some 29.5 x 10.5's under my fenders but I also had a bunch of inner fender modifications. With the shorter height, it may or may not clear the front radius of the inner fender and you may have to cut off the bump stop also to get the 10.5 under the fenders.

The 8" wide rims are going to be small for the 10.5 tire. Some 10" rims with 5.5" backspace will be much better.

project89

iTrader: (1)

thnx ill give them a shot, the friend who gave them to me ran them on a 15x8 on his grandnatonial, and i dont have any 15x10 rims.if they were brand new slicks and i knew for sure they would fit i might go buy a set of 15x10 draglites.

but im just gonna be using these to get me threw the rest of the year.

i already removed my bumpstops, the ds rear slick woudl always wedge against it when i put the car on the lift.never had any issues on the passenger side though.

DIGGLER

iTrader: (1)

i run 28x10.5 hoosiers on a 15x10 wheel. 5.5" backspacing.
bumpstop area was removed, i removed a little bit of material at the front of the inner fender, and lots of hammering with a 3lb. sledge.

project89

iTrader: (1)

got any pictures??? im gonna try to mount these tommorow.

will running these on the 15x8 rim make it a lil easier to fit?

88IROC350TPI

I once upon a time had 28x10.5 ET Drags on my car with 15x8's 5.5" backspacing. I had to take out a sledge hammer and beat the crap out of front side of the inner fenders. The sidewall of the tire also hit my emergency brake cable/bracket, and when you jacked the car up and let the rear hang down the sidewall hit the bump stop. Even when beating the wheel wells out the tire was very close, so close it made me wonder what would happen when/if the tire grew down the track.

project89

iTrader: (1)

thnx for the reply guys, i quess ill be taking out the big brass sledge hammer(dam things gota be 10 pounds lol) and knocking around a few parts of the inner fenders

88iroc u wouldnt happen to have a picture of those from behind that car would ya

88IROC350TPI

Hopefully this isn't too dark to see the tires... A few people assumed my car was mini-tubbed with those tires because they tucked in so far.

project89

iTrader: (1)

thnx just wanted to see what it looked liek compared to my 9inch wide slicks
cars somewhat up on the lift here but yeah damn those things are tucked under nicely
i cant rember the backspacing on my rims though ill have to measure them tom

AlkyIROC

Tubbed with 14.5 wide

project89

iTrader: (1)

lol a 10.5 tire should be more then enough for what the cars capable of i hope neway

project89

iTrader: (1)

mounted the slicks today, had a hard time getting the beads to seat on the 15x8's but i finally got them on.

neways i bolted them onto a friends camaro using some 1/4 thick spacers, the only interference was on the front edge of the slick by the lca.that piece of sheetmetal that hangs down. but mine are already clearanced there so they should bolt right on even without the spacers.

the best part was they even cleared the bumpstops on my friends car,but only if u jacked the car up under the rear

DIGGLER

iTrader: (1)

keep in mind that when you turn, the whole sidewall will move over quite a bit at times. you need a good bit of clearance.

project89

iTrader: (1)

i will check it tomorrow, i left the slicks at a friends house that lives right by the track im gonna pick them up when i take the car to the track, i prolly had about 1.5 inches clearance on his car all the way around,ewxcept for by that one part of the inner fender it only had about 3/8's clearance.

when i get to the shop today im going to hammer out my inner fenders a lil bit more just to be sure though

KWIK84

iTrader: (5)

I'm running the same slicks on 15x8's with 4.5 BS, and they fit fine without any mods, although I did roll the inner lip just to be on the safe side. FWIW the 28 x 10.5S recomendation from M/T is a 9" rim. Mine mounted up easily, I am still playing with psi on these...but so far 11.5 is working the best.

project89

iTrader: (1)

yeah i think they say 9-10 rim for them i just didnt have anything that wide.

im going to the track in a lil while im gonna try 12-14psi in them first pass.

im hoping i can hit these tires hard,
Comming off the footbrake at 4,000 rpms and 8+ psi of boost i would spin with the 26x9's

im going to put down my first pass at 9 psi and come out of the hole liek 4k and 7 psi

second pass im going for broke and gonna try a 4,400 launch with 15 psi of boost and see if they will bite

i just hope the ring and pinion stay in one piece lol, car will pull a high 1.8-low 1.9 on the street tires comming out of the hole at only 2-3 psi and 3k rpms

xpndbl3

iTrader: (5)

in 2 buddies cars we're running 13.5psi in a heavier car(3500lbs) and 12-12.5 in a lighter car around 3k pounds. I'm surprised you're running such low pressure in them.

project89

iTrader: (1)

we ran 15 psi in them tongiht way to much pressure.

they spun both runs comming out of the hole even spinning the car cut a 1.83 60'

since we have them on 8 in wide rims we only ran on the middle 7-8 inches of the tire,we had to hot lap the car so i didnt have time to drop the presure.

next time out i will try 12 psi and see if that helps

LB9GTA

iTrader: (1)

I am running an et street. It is a 28x12.5x15 on a 8" prostar rim with a 4.5 backspace. I used a hammer to push in the inner fender well with no problems.
The only problem is when I have a passenger in the rear seat, then it rubs when I hit bumps. But a new set of shocks and a air bag will fix that.

Batass

Looks like there are different sidewall widths for the 10.5 with different part numbers. The wider ones are just as wide as my 29X12.5 were and I had to do major cutting/beating to get them to not rub going down the road, but on hard turns they still would.

IHI

iTrader: (1)

A 9" slick is plenty for at least 750hpand over 600ftlbs tq if you have the car set up right

KWIK84

iTrader: (5)

I started out with 12 and dropped the .5 # and got the car to 60 ft a little bit better. With my old soft sidewalls 12 was the best for it. With these new stiff sidewalls the 11.5 seems to be working for now. FWIW car weighs 2910 going down the track.

project89

iTrader: (1)

my cars just shy of 3400 track wieght. 15 psi was just tomuch the slicks were crowned up in the middle. if i make it to e-town tongiht im gonna try 12 psi and drop down to 10 if need be

Rayzor32

iTrader: (1)

no way you'd need a 4th gen rear or cut the bump stop out. I barely fit 255/50-16s in i'd have to cut that bump stop out to fit anything bigger

mattsv8_03

iTrader: (2)

arent the 28x10x15 the same as a et street 28x12.5x15. i ask because i plan on running the 28x12.5x15 on a set of 15x10 BS streetlight wheels with 6.5" bs. and skinnys up front. it will be my driver for a while so i will be running some cheaper bfgs when driving normal mounded on cough stock wheels. lol