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junior barns 07-23-2021 10:35 PM

Converter flash
 
Does a gear change affect converter flash ? Say going from 5.13 to 4.88 or 4.56 to 5.13

Gmirza 07-24-2021 08:24 AM

Re: Converter flash
 
Yes it will. Not a lot, but it will change. It’s just like adding weight. Everything being the same the converter will flash higher with 4.56 than a 5.13. You may not see much change either way with 4.88.

junior barns 07-24-2021 10:19 AM

Re: Converter flash
 
Thanks

Jeff Stout 07-24-2021 10:30 AM

Re: Converter flash
 
I went from a 4.30 to 4.88 and lost 300 on converter.

Stan Weiss 07-24-2021 10:42 AM

Re: Converter flash
 
Quote:

Originally Posted by Jeff Stout (Post 644092)
I went from a 4.30 to 4.88 and lost 300 on converter.


Jeff,
How many did the slippage change on the top end?


Stan

Adger Smith 07-24-2021 05:07 PM

Re: Converter flash
 
A different low gear Trans ratio will change stall but not the % slip on top end.
A rear gear will change both stall on the leave and slip down track.

junior barns 07-24-2021 10:22 PM

Re: Converter flash
 
Adger, in your experience How much will it change going from 2.52 to a 2.75 1st gear?

junior barns 07-24-2021 10:35 PM

Re: Converter flash
 
Quote:

Originally Posted by Jeff Stout (Post 644092)
I went from a 4.30 to 4.88 and lost 300 on converter.

Thanks Jeff. What I was looking for on rear gear changes.

Adger Smith 07-24-2021 11:51 PM

Re: Converter flash
 
Jr, Can't really put a number to it. too many variables. small engine vs large engine,... where in the Tq curve the original stall was, ect. Each application varies. Change the gear, check it with your original converter and make changes as necessary. Like it has been said before... change one thing at a time and test. Your new gear may not like the stall the other set up liked. Don't forget about the low to second % gear drop may change. That may be where you need some help from a converter. Good luck Test, Test...

Jeff Stout 07-25-2021 09:48 AM

Re: Converter flash
 
With gear change the data logger showed the finishline lock up went from 6.5 to 5.5. I liked that part but not the .05 loss on 60ft.


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