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356-930 356-930 is offline
Acceleration Junkie
 
Join Date: Aug 2007
Location: Laguna Beach, CA
Posts: 263
Garage
Quote:
Originally Posted by sandgroper View Post
I need to pull my trans and do 2nd and 3rd,Werk can you suggest any ratio changes,part numbers etc as id like to do this while the trans is out,thanks
For my 356-930 street rod I changed 2nd from the stock 1.304 to 1.737 and 3rd from 0.893 to 1.208. At redline, MPH is now:
1-50
2-70
3-96
4-177
About $500/gear
For the street, the close ratio keeps the engine high in the HP/torque region. Rate of acceleration in both 2nd and 3rd is way cool.
The downside is the drop in torque from 3rd to 4th resulting from the aprox 3050 RPM drop. (Stock drop is approx 2350.) Acceleration wise, it feels like you dropped into overdrive instead of the next gear.
You're trading speed for acceleration. This said, the end of 3rd gear is reached in less than 10-seconds and is also well above the speed needed to irritate any highway patrol officer.
IMO, the gear change/rebuild of the 930 trans is not a DIY project. Have a 930 transmission pro do the job. I didn't have a pro do mine and the engine/transaxle was out 2X in 3X before it was right. Not a rewarding experience.


A supplier of gears (and charts to show one what gear ratio changes will accomplish):
Guard Transmission
PO Box 280
Meadow Vista, CA 95722
888-894-3277
530-878-4499
http://www.guardtransmission.com/
No affiliation.
__________________
Chris Toy
356-930 Gone
Old 02-22-2009, 10:29 AM
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