Turbo 400 kick down switch vacuum or mechanical?
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Junior Member
Joined: Mar 2015
Posts: 2
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From: East Tennessee
Car: 86 Sport Coupe
Engine: Warmed over 350
Transmission: 700r4 V case
Axle/Gears: 3.43
Turbo 400 kick down switch vacuum or mechanical?
So my question doesn't specifically apply to my thirdgen, but I figure it's relevant for those doing a swap.
I recently swapped a Holley in place of a Q-jet on a factory turbo 400 car. When I swapped on the new carb, I didn't think about the kick down switch.
Would you use a linkage operated switch like the factory set up or a vacuum operated switch like the adjustable B&M unit?
Why?
I recently swapped a Holley in place of a Q-jet on a factory turbo 400 car. When I swapped on the new carb, I didn't think about the kick down switch.
Would you use a linkage operated switch like the factory set up or a vacuum operated switch like the adjustable B&M unit?
Why?
Joined: Oct 2013
Posts: 2,614
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From: Louisville, KY
Car: 1983 Z28
Engine: 385 Fastburn
Transmission: T-5
Axle/Gears: BorgWarner 9-bolt posi, 3.27 gears
Re: Turbo 400 kick down switch vacuum or mechanical?
I would use the linkage operated set-up as you know it will kick in when you need it (directly tied to the throttle) as opposed to one that works on vacuum.
I have a TH350 in mine, granted the kickdown isn't hooked up, but I plan to use the linkage set up.
I have a TH350 in mine, granted the kickdown isn't hooked up, but I plan to use the linkage set up.
Supreme Member
Joined: Jul 1999
Posts: 3,484
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From: Calimesa, California, U.S.
Re: Turbo 400 kick down switch vacuum or mechanical?
The TH400 is an electrical kickdown. Adjust it to kickdown only with a lot of throttle (3/4 throttle), unless you want an easier kickdown.