vigilante 9.5 5 disc lockup

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ryan george

Member
Joined
Jan 17, 2007
Messages
350
What can I expect to feel in both normal street driving and WOT applications on changing from the stock converter to the Vigilante? Thanks!
 
it seems the same as a stock converter under normal driving. Then it will spool your turbo faster under WOT. I am assuming proper turbo/stall combination. I cannot tell a difference when just driving around town out of boost.
 
Make sure your chip or engine management has anti-stall feature added for it.

It's considered a "lightweight" converter.
 
The larger rotating mass of a stock 12 inch D5 converter will help keep the engine spinning if you suddenly let of the gas such as right after doing a burnout when the idle can suddenly drop to below before the IAC motor can recover. Sometimes with smaller converters that dont have the large rotating mass of a stock converter the engine can stall and die before the IAC can catch up. A modified chip accounts for the reduced rotating mass. I have seen numerous Buicks stall at the track right after doing a burnout when they let off the gas.

As for driving impressions...well..the engine revs quicker, the turbo spools like lightning with a stock turbo...it made my PT52 behave almost like a stock turbo and converter combo...and with a ball bearing turbo it will spool like a supercharged car. Watch driving on wet roads because it can make your tires blow off VERY quickly. Just normal driving around...slightly higher RPM's until the converter locks at which point its just like driving a stocker. Its one of the best mods I've done yet to my car. I love it. The muti-disc units do chatter a bit...but thats normal. I only have a single disc but it works just fine.
 
Thanks much. Just picked my GN up from Vince Janis last night with the 9.5 Vigilante 5 disc installed. Waiting the specified mileage before I can see what she'll do is going to be tough!
 
He built mt tranny went with pretty much same setup as you,I love it and he builds one hell of a tranny...:biggrin: :biggrin: :biggrin:
 
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