Help choosing dif gear ratio for my setup

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11-12-2018, 08:19 PM

#11

Toes

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Or I guess instead of a rear gear you could go with a bigger tire. Has to be room for more than a 28 inch tire.

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11-18-2018, 07:59 PM

#12

400ss

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Did a little more work on the trans tune, shifting better, it did 12.5 on the 1/4 mile with the same 4.10 gear ratio but it does shift to 5th gear, not good, i got a 3.55 gear ratio from a friend and will try it, i may lock converter at WOT in 4th gear if needed, ill update you guys, thanks everyone

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11-19-2018, 07:05 AM

#13

silver-mod-o

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I wouldn't go any taller than a 3.73 on that setup and just raise your shift point and limiter, that Procharger wants RPM. Chances are 62-6300 is just getting to the good stuff. Let that thing swing to 6800-7K. You'll probably be faster and won't be shifting to OD at the top of the track.

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11-19-2018, 12:38 PM

#14

400ss

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Quote:

Originally Posted by silver-mod-o

interesting, yes more rpm report more boost on my logs, my rpm limiter is at 6400rpm , stock can stock springs probably won't hold to 7rpm,

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11-19-2018, 01:52 PM

#15

silver-mod-o

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I probably wouldn't do it on stock springs. It I've spun single PAC and Comp springs to 7K on "spring friendly" camshafts. Dual springs are a must with high lift and fast ramp rates though. The thing to do would be to put it on a dyno and see where your peak power is and shift it just past the peak, and gear/tire accordingly.

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11-19-2018, 08:41 PM

#16

ZO6Ted

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I definitely wouldn't want to go to OD in the 1/4. I like wallaceracing.com for calculators. I like my 3.42's just fine so far.

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400ss (11-20-2018)

11-20-2018, 10:45 AM

#17

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Quote:

Originally Posted by silver-mod-o

Hi man, i think i will upgrade cam/springs at same time , i did put it in a dyno and will do soon again, peak TQ was like at 5,000RPM and peak HP was at the higher RPM, the more RPM the MORE peak HP, it keep pushing more boost, i will upload pics of the dyno run. i just found a 3.73 gears ratio on my house, i will put those and upgrade rresults on thursday, i will go to the track, 3.73, and will keep it on 4th gear

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