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Old 06-14-2017, 09:40 PM   #1
Professorchaos
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Question gear and tire selection help for F1A setup

Good evening everyone,

So after switching over to the f1A I've been modding like crazy. Car put down 642 rwhp and ran out of fuel on the top end. So I replaced the fuel system with lonnies return double pump and the mod bug got a hold of me once again. Ended up buying gforce's coil overs front and rear, modified control arms, and a bunch of bushings and other little things here and there. I will be mini tubing it with the Gforce tubs to take advantage of the new mods in the rear. Now I'm looking at the rear dif and what gears I should go with along with tires.

I already have 15'' drag rims so the question is which tire size and gear would complement each other nicely at the track and getting out of the hole faster. I ran 26" hoosier's last season and still had trouble getting a good launch with the new power. Any recommendations? Been searching and have been getting mixed reviews on tire sizes and gear ratios for a M6 procharger setup.

More info I found: From the Gopro video it looks like I'm crossing the finish line at 5800 - 5900 RPM in 4th and trapping 120 mph on the 26" hoosiers and stock 3.46 gears.

Last edited by Professorchaos; 06-14-2017 at 10:45 PM.
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Old 06-16-2017, 08:02 AM   #2
hadagto
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I'd stick with the stock gear.
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Old 06-16-2017, 08:17 AM   #3
GTO44
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Quote:
Originally Posted by Professorchaos...View Post
Good evening everyone,
I ran 26" hoosier's last season and still had trouble getting a good launch with the new power.

What's happening on launch? What clutch? Are you using a 2-step?

Any video of your current runs?
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Old 06-17-2017, 07:35 AM   #4
bluhaven
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go to at least a 28" tall tire

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Old Yesterday, 02:44 PM   #5
PonchoHoncho
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Quote:
Originally Posted by bluhaven...View Post
go to at least a 28" tall tire

Kevin

Yeah, that's what I would recommend, too. Only because you can't go any taller with the stock rear wheel openings, lol, even if you mini-tub it. I have plenty of clearance everywhere but at 3 o'clock and 9 o'clock with a 30" tall tire (ET Drag), and I'm mini-tubbed. Sectioning the quarters would fix it, but I really don't want to do that.
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