RE: 13's at last!

["Robert (UK)" <r.lane@xxxxxxxxxx>]

Thanks Earl

I was talking to someone about this last nite, at our club's monthly 
meet, certainly something that needs more investigation.

Robert
63 Polara 500
England

Earl Helm wrote:
> 
> Don,
> 
> I feel the most important part of the shift decision is the gear split 
> or the RPM drop resulting from that split. If the split is so large it 
> drops the RPM range below the Max Torque point, it will cost you 
> ET. With a 3 speed trans, like a 727, you might find you need a 
> different shift point for 1 to 2 than you need from 2 to 3 based 
> on RPM drop and peak torque RPM's. Without having had your 
> engine on a Dyno, or your car on a chassis Dyno, it has to be done 
> via experimentation. If your split is so large your dropping below 
> the max torque RPM, you could go faster by shifting at a higher 
> rpm for that gear. Converse to that, short shifting could be a benefit 
> if the split is small enough that your coming in to the next gear 
> way above the torque curve. It takes lots of runs and experimentation 
> to get it just right.
> 
> Earl


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