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02-28-2009, 02:26 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,310
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Not Ranked
What third member gearing do you have ?
What are your rpm's @ 60 mph ?
It seams that a lot of guys with the Tremec 600, have a lot steeper gears than my 331's. Can't recall the number ? 382, high 3,.......something. lol 
I'll have to search.
__________________
Regards,
Kevin
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02-28-2009, 02:32 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
Kevin, email #2 is headed your way.
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02-28-2009, 02:44 PM
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CC Member
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Join Date: Jul 2005
Location: Virginia Beach, Va & Port Charlotte, Fl.,
Posts: 2,292
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Not Ranked
Quote:
Originally Posted by FUNFER2
What third member gearing do you have ?
What are your rpm's @ 60 mph ?
It seams that a lot of guys with the Tremec 600, have a lot steeper gears than my 331's. Can't recall the number ? 382, high 3,.......something. lol
I'll have to search. |
The 3.31s are fine. If anything I'd go taller. I'm running 3.25s now, down from my old 3.70s. With a 0.82 overdrive the 3.00s would be great for the street too. There's plenty of speed/RPM calculators available online. Your tire height is a critical part of the calculation and needs to be considered also when selecting gearing. Talk to Keith. Ask him what the minimum cruise RPM will be with your 482 combo too. Give me your anticipated tire height and I'll run a couple speed/rpm scenarios for you.
Dave
Dave
__________________
Too many toys?? never!
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02-28-2009, 03:02 PM
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CC Member
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Join Date: Dec 2006
Cobra Make, Engine: CSX 4000; Shelby aluminum FE with 58mm IDAs
Posts: 1,116
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Not Ranked
Quote:
Originally Posted by FUNFER2
What third member gearing do you have ?
What are your rpm's @ 60 mph ?
It seams that a lot of guys with the Tremec 600, have a lot steeper gears than my 331's. Can't recall the number ? 382, high 3,.......something. lol
I'll have to search. |
You will be fine with the 3.31 gear with the TKO 600 and .82 OD.
I have a TKO 600 (.82 OD) with 3.42 rearend (and a KC bored/stroked aluminum FE)--the comination works well (and I wouldn't hesitate for a minute to switch to a 3.31 rearend). |
02-28-2009, 06:16 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,310
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Not Ranked
I'm happy my rear end will work out. 
Blykins- I haven't worked out the detail's with the cam. I don't think I have your 2nd email ?
Dave, the tire I have now is a 295/50/15
The Billboards I think,....are either 26.5" or 27". Which I have no idea what that converts to ? Someone here on CC, had a chart but, I don't recall who ?
__________________
Regards,
Kevin
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02-28-2009, 06:18 PM
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CC Member
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Join Date: Dec 2001
Location: Louisville,
KY
Cobra Make, Engine: I'm Cobra-less!
Posts: 9,417
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Not Ranked
I sent you an email on the gear ratios and the pricing on the transmission.
I'll send you a PM with it all.
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02-28-2009, 06:25 PM
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CC Member
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Join Date: Jul 2005
Location: Virginia Beach, Va & Port Charlotte, Fl.,
Posts: 2,292
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Not Ranked
Quote:
Originally Posted by FUNFER2
I'm happy my rear end will work out.
Blykins- I haven't worked out the detail's with the cam. I don't think I have your 2nd email ?
Dave, the tire I have now is a 295/50/15
The Billboards I think,....are either 26.5" or 27". Which I have no idea what that converts to ? Someone here on CC, had a chart but, I don't recall who ? |
Given a 3.31 rear ratio, .82 final drive, and a 27" tire you will turning 2195 RPM at 65, 2027 at 60. 26.5" tire height will yield 2237 at 65.
All things equal, with a 0.64 and a 27" tire you'll see 1714 RPM at 65 and 1582 RPM at 60.
The 0.64 will be useless for road racing..
__________________
Too many toys?? never!
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02-28-2009, 06:44 PM
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CC Member
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Join Date: Oct 2002
Location: Eagle,
Ne.
Cobra Make, Engine: 1966 Lone Star 427SC.
Posts: 4,310
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Not Ranked
That's the numbers I would be satisfied with for sure. Like I said, with my 3550 and 331 gears, I ruining 2,000 rpms at 60 mph.
__________________
Regards,
Kevin
Last edited by FUNFER2; 02-28-2009 at 06:48 PM..
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02-28-2009, 07:08 PM
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CC Member
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Join Date: Jul 2005
Location: Virginia Beach, Va & Port Charlotte, Fl.,
Posts: 2,292
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Not Ranked
__________________
Too many toys?? never!
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