Hi!
I'm wondering if i can have this slicks 10,5-28-15 M/H on my Pontiac Formula 1995?
I'm wondering if i can have this slicks 10,5-28-15 M/H on my Pontiac Formula 1995?
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28 inches is gonna be tight. 26 is the best fit. I think Fred is running a 28" tire, but had to do some massaging if im not wrong.96 WS6 Formula: Ram Air, 383 Stroker, Ported LT4 Heads and Manifold, 1.6 Crane Rollers, 58MM T.B., AS&M Headers, Borla Exhaust, Meziere Elec. H2O Pump, Canton Deep Sump Oil Pan, 100 HP OF TNT N2O!! , T56 Conversion w/ Pro 5.0 shifter, SPEC Stage 3 Clutch, Hotchkiss Subframe Conn., Lakewood Adj. Panhard Bar, Spohn Adj. LCA's, BMR Adj. T.A., Custom 12 bolt w/ 3:73's, Moser Axles, Eaton Posi, Moser Girdle
11.6 @ 123mph (1.6 60' - getting there
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Check the EXACT diameter of the slicks. You appear to be referenceing "M&H Racemaster" 28x10.5"-15 tires. But its not clear... maybe you mean "M/T" for Mickey Thompson.
In any case, a 28" diameter slick may or may not rub on the wheel openings. I ran Hoosier QTP 28x11.5"-15 slicks, and they were quoted as exactly 28.0" diameter. They just fit into the wheel openings, and were OK until trap speeds went over 125 miles/hour. At that point, the tires "grew" enough in diameter to hit the metal edge at the front of the fender openings. I had to use adjustable LCA's to move the axle assembly back about 1/4" to eliminate the interference.
Then I switched to M/T 28x10.5"-15W, specified as 28.1" diameter. They are actually a bit larger in diameter than that, and they would not even fit into the wheel openings. I ended up cutting about 1.5" off the edge of the rubber bumper cover to make enough room so they did not rub. At about the equivalent of 131 miles/hour on the dyno there was still evidence that they were rubbing on the metal edge which is behind the bumper cover - and I had already hammered it quite a bit.
A 28" tire is also going to hurt your acceleration, unless you are making in the neighborhood of 600-700HP or more, or unless you go to a 4.11, 4.30 or 4.56 rear axle ratio. For a relatively stock car, you would be fine with a 26" tire. Up to maybe 750HP, use a 27" tire. Over that, go to a 28" tire.
Fred
381ci all-forged stroker - 10.8:1 - CNC LT4 heads/intake - CC solid roller - MoTeC engine management - 8 LS1 coils - 58mm TB - 78# injectors - 300-shot dry nitrous - TH400 - Gear Vendor O/D - Strange 12-bolt - 4.11's - AS&M headers - duals - Corbeau seat - AutoMeter gauges - roll bar - Spohn suspension - QA1 shocks - a few other odds 'n ends. 800HP/800lb-ft at the flywheel, on a 300-shot. 11.5 @ 117MPH straight motorComment
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"Check the EXACT diameter of the slicks. You appear to be referenceing "M&H Racemaster" 28x10.5"-15 tires. But its not clear... maybe you mean "M/T" for Mickey Thompson."
It's is "M&H Racemaster" 28x10.5"-15 tires".
Well i just race on the street in "streetrace"... So it's about 1/8mile
I will not reach 100mph I think
(the car is stock with 285hp LT1)
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And i need some 15" wheelies.
Which exact do i need? And will it fit on my stock formula?Comment
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So you going to drive around on slicks on a stock formula? Maybe you ought to get drag radials, or possibly ET streets, but slicks?
You got an automatic or a six speed?Comment
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I have a automatic.Originally posted by Kevin - Blown 95 TA
So you going to drive around on slicks on a stock formula? Maybe you ought to get drag radials, or possibly ET streets, but slicks?
You got an automatic or a six speed?
Slicks are the best on the street... But I can buy some et streets or drag radials too.. Just saw some cheap slicks.
Well know i'm stock but soon i will have 100hp nitrous shot and headers.Comment
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