TurboSpoolinInside

So excuse me for my newb-ness to FWD/slicks, but I am needing to know this.

I have a K20a-T that makes 520whp. It has a base RSX tranny w/ pretty long gears.

info on car: 98 Integra GSR, 8600 redline, RSX Base 5spd tranny, 520whp/369tq


I've used http://www.fatboyraceworks.com/gears/ calculator to figure out my gearing and mph through the gears.

4th gear is quite long and I assume my car will trap between 130 and 140 (optimistic) with perfect conditions...

Now, I don't have slicks and am planning on borrowing some for just a few passes. Using that calculator on the above link, I could get away with 22's and still have 4th gear top out at 139mph.

I am told I want 24.5's but with tires that tall, I'd have really long gears (4th would goto 155mph)

with 23's I would get 4th to go 145mph.

Now, the question is, is there anything BAD about getting smaller tires when my tranny's gearing will end up compensating the mph correctly?

I have only raced AWD cars and haven't ever used slicks and messed w/ tires/gearing so I really don't know.

ANY input would be appreciated. A friend is willing to let me borrow his 22" slicks if I want. I just don't know if it's worth trying then or if I should try and find 23" ones instead.

turbo-2nr

a 22 is not going to be enuf tire for that much power go with a 24.5

TurboSpoolinInside

Even if the gearing is there?

HPgonewild

the 500hp will over power the 22s since its a small tire. Then your gearing will somewhat be thrown out the window since there is going to be wheel spin.

The gearing calculators will only work if there is no wheel spin and in perfect conditions where there is traction. I wouldnt sacrifice proper tire height for gearing "calculations". Its one of those things that you just have to try out for yourself and see how the car reacts to it.

TurboSpoolinInside

Would you think 23's would even work? I have a friend who'd let me borrow those too. I just don't want it to be too "doggy" if I found a set of 24.5's.

HPgonewild

Id try the 23s and see how that goes.

sanman000719

24.5 on my stock gsr tranny with 550 h.p. traps 145mph

Gearspeed-Performance

iTrader: (1)

I agree and would try the 23's as HP stated first.

TurboSpoolinInside

Will do, we'll try 23's! Thanks.

dturbocivic

how many rpms are you actually making 520~ hp ? post ur dyno graph

SL0WEGG

dturbocivic

if u rev it out to 10,500 or 11, does the power stay flat or does it drop ?

Gunmetal_B20_Hatch

iTrader: (9)

You also have to factor in tire growth once you are doing 100+ mph.

dturbocivic

who cares about growth, them tires are ****ing tiny. put the 24.5's on the car and rev the **** out of the car, if the power is there the car will go fast.

SL0WEGG

He thought about using my baby slicks lol. But I believe he has found some 24.5's he's able to use

dturbocivic

now rev it up like big boys...

Divers

Whats the correction factor on that dyno graph? 520hp dyno dynamics uncorrected is alot. You're gonna want the "out of the hole" traction that 24.5" will give you.

Divers

K20R only 8600rpm?!?! Rev it higher and that will help you fall into a better spot going into 4th.

Krut

98 DC2 - Stock Unopened Longblock K20a2-T<<<<from his sig

TurboSpoolinInside

It is 11% corrected and it is a completely stock motor/head/never opened so I personally don't know what its "safely" rev-able to, to be honest.

I did find someone who'd lend me 24.5's, but decided against going to that track. I am gonna goto another track and use some 23x8's that will be available to me... hopefully I get half decent runs.

sanman000719

i was still running 24.5 on 400 h.p running mid 11's at 133

TurboSpoolinInside

What would the downfall of me getting 26x8x15's be... if I found a really good deal on them? I'd have to raise my front up but I mean it'd just be for the track... Too big? Would I bog too hard/potentially break axles easier?

turbo-2nr

they will brake axles and trannys