Drag racing setup
#42
Retired Mech Design Engr
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PM me.
I also spoke with MandH and John -(661) 889-5221 said he would support import owners with coupons. He gave me the “you have to run bias plies in the front with slicks” song.
Another interesting thing about Australia, they only require bias up front with slicks at a certain speed (which I don’t remember, but faster than I will be going).
I wish that 949 had produced a 4” instead of the 6”.
I also spoke with MandH and John -(661) 889-5221 said he would support import owners with coupons. He gave me the “you have to run bias plies in the front with slicks” song.
Another interesting thing about Australia, they only require bias up front with slicks at a certain speed (which I don’t remember, but faster than I will be going).
I wish that 949 had produced a 4” instead of the 6”.
#44
Retired Mech Design Engr
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I've got the roll bar, but not the harness to go with it. However 16.1 harnesses seem mighty reasonable in price.
I thought this would be simple, much less complicated than a reliable track car, but the details of not breaking the car, and me wanting to "do it right" is getting difficult. Likely I'm over-thinking and should just try with what I have and see if I can even shift well under duress.
mata2fast: And matching rear? I can't tell. Thanks.
#47
You want just enough tire to get the job done. Too much tire will slow you down on every part of the track. Keep in mind manual shifted turbo cars don’t hit as hard off the line as nitrous, so you will not need as much tire.
Also, it is important to have the lowest gear ratio you can to get through the traps without going into overdrive gears. If you don’t plan to change from a road race final gear, go to the shorter tire.
Also, it is important to have the lowest gear ratio you can to get through the traps without going into overdrive gears. If you don’t plan to change from a road race final gear, go to the shorter tire.
Last edited by miata2fast; 11-30-2017 at 10:06 PM.
#48
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Awesome, thanks. It seems insane to me but all the online calcs claim the car will go 130mph in the quarter, so I'm planning on needing ~140mph worth of wheelspeed to get there. Assuming 415whp/2700lbs with driver. With my 3.63s, that is 7000rpm on 24.5s or 7500rpm on 23s. Will that 23x8.5 hook that kind of power in 2nd, or will the 24.5 do it, or will neither tire do that so I'm better off staying shorter?
#51
Awesome, thanks. It seems insane to me but all the online calcs claim the car will go 130mph in the quarter, so I'm planning on needing ~140mph worth of wheelspeed to get there. Assuming 415whp/2700lbs with driver. With my 3.63s, that is 7000rpm on 24.5s or 7500rpm on 23s. Will that 23x8.5 hook that kind of power in 2nd, or will the 24.5 do it, or will neither tire do that so I'm better off staying shorter?
This is a 24" mickey Thompson, launching at 5K @ 20 PSI, it dead hooks.
#53
The soft suspension was helping that car a lot as well. I think 24.5"x9 is plenty big for anything we will ever do in a Miata. A SFWD Honda is limited to 24.5x9.5 and they are putting 1200+ whp down and running 1.4 60's (7.9 @189). Thats with the weight transfer working against them.
I had to launch at 8000 to get the 24.5 to not bog thats with 280whp K24.
with that tire and 3.636 gears and a 6spd I was going through the traps in 4th well off my 9k limit. 23" tires on 4.10 gears would work perfect for me and like posted above the smaller tire probably would help me pick up everywhere. I could launch lower and more in the torque and have less resistance. I would expect my car to run high 11's with those changes.
I had to launch at 8000 to get the 24.5 to not bog thats with 280whp K24.
with that tire and 3.636 gears and a 6spd I was going through the traps in 4th well off my 9k limit. 23" tires on 4.10 gears would work perfect for me and like posted above the smaller tire probably would help me pick up everywhere. I could launch lower and more in the torque and have less resistance. I would expect my car to run high 11's with those changes.
#55
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Seems that it is OK to run those rims with proper Front Runner skinnies.
#57
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? Spare is a 15x4 wheel, aren't most frontrunners set up for 15x4s?
#58
3.5/22.0-15 (Skinnies) D.O.T. Certified
? Spare is a 15x4 wheel, aren't most frontrunners set up for 15x4s?
? Spare is a 15x4 wheel, aren't most frontrunners set up for 15x4s?