[Fot] Diff ratio for Road America

[David Amys]

Maybe we should set the rev limiter to 6,500 for the long straight into turn 1 and go with the 3:89. It does like to rev with the lightened flywheel. I would think the lower gears would be easier on the new motor also.
Tire diameter is approx 21 1/2".

Sent from my iPhone

> On Aug 28, 2016, at 9:36 AM, Barr, Scott <sbarr at McCarty-Law.com> wrote:
> 
> Which tires?  Roughly 22" diameter?  I generally used a 3.89 there, but it's an awful lot of revs for a long time if you have no overdrive.  I tried a 3.27 once, but the Spit didin't have enough grunt to pull that gear, and I was drag-limited to about 88 mph.  Not ideal either.  Maybe the GT6's additional torque would make the 3.27 gear work just fine.
> 
> I will try to remember to send you a gear calculation spreadsheet which I have on my computer at work...
> 
> Scott (B.)
> 
> 
> 
> Sent from my Verizon, Samsung Galaxy smartphone
> 
> 
> 
> -------- Original message --------
> From: David Amys <damys at charter.net>
> Date: 8/27/16 10:26 PM (GMT-06:00)
> To: fot at autox.team.net
> Subject: [Fot] Diff ratio for Road America
> 
> -------- Original message --------
> From: David Amys <damys at charter.net>
> Date: 8/27/16 10:26 PM (GMT-06:00)
> To: fot at autox.team.net
> Subject: [Fot] Diff ratio for Road America
> 
> Need advice on which diff to run at Elkhart. Our first time out. GT6 with mild motor.  We have two diffs. 3:89 welded and 3:26 stock rebuild. Rev limiter set at 6,000.
> Thanks
> Dave and Alex
> 
> 
> Sent from my iPhone
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