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09-14-2020, 01:02 PM | #1 |
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Best gear for 9.90
What is the ideal gear for a 2600 lb tube chassis car with a 582 BBC and glide? Been running 4.10 with a 33" tall rear tire and it seems as it is hard to recover off stop and it wants more gear, say 4.56?
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09-14-2020, 01:14 PM | #2 |
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Re: Best gear for 9.90
Finish line RPM kinda puts you in the ballpark
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Phil Molski S/C 1623 |
09-14-2020, 01:59 PM | #3 |
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Re: Best gear for 9.90
Would the 4.56 help coming off the stop to recover?
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09-15-2020, 01:20 PM | #4 |
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Re: Best gear for 9.90
I agree that I'd base the rear gear choice on finish line RPM. As for recovery coming off the stop, you can try a higher cruise RPM, coming off the stop in low gear, going on the stop later to get the car moving, etc.
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09-16-2020, 09:55 AM | #5 |
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Re: Best gear for 9.90
While it is true that finish line RPM plays a part, I was convinced a few years back by Eddie Jr, at Select Performance, to go to a 4.56 gear.. not only to enhance his converter set-up, but that I would be surprised by the charge coming off the stop.. I now have 2% to 3% slip in the converter at the top end, and that charge coming off the stop is awesome, and I go out the back door at approximately 7600 RPM with my 565.. I am only 2150 pounds also..
While I was a nay-sayer, until I switched from the 4.30, I doubt I'll go back.. while it slightly increased the RPM, I didn't seem to affect the MPH at all... |
09-16-2020, 12:21 PM | #6 | |
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Re: Best gear for 9.90
Quote:
Was there a measurable gain anywhere? Could you stay on the stop longer?
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09-30-2020, 09:54 PM | #7 |
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Re: Best gear for 9.90
Although I didn't mention MPH, I'm up between one and two.. also, I usually do stuff to try and take time out of the box.. not put more time in.. and I really don't like carrying 3.00 in the box either...
Last edited by Charlie Yannetti; 10-03-2020 at 04:42 PM. Reason: add to comment |
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