I found some information on the Roots Type 112 Eaton Blower that is used on our Lightnings. Hope this helps. http://www.mediai.com/lightning/Tech/tech.html

I read this info on the Eaton Supercharger, and have a few questions that possibly could help with giving us extra boost.
"The Eaton supercharger system incorporates a specially designed bypass valve, which is actuated by a vacuum motor near the throttle body, and recirculates the supercharger air flow when boost is not required. During typical driving conditions, the engine is under boost around 5% of the time, which means the remaining 95% of the time the engine is under vacuum, allowing for better fuel economy and a quieter ride. "
This almost sounds like a turbo wastegate. Should I assume that the blower in the Lightning actually vents blower output until a certain pressure has been reached? This would explain why the gauge shows vac so often and why the boost does'nt seem to kick in untill 2.2K rpms. This also raises the question of whether the threshold on the bypass could be altered to provide more boost at lower RPMs.

Metallic Blue

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1999.5 Black
SVT Lightning
Bone Stock
CD Changer, Tonneau Cover, Class III Tow Hitch.

 

Hey, i recognize that post!
I'm trying to collect as much lightning info on my site as possible. If you have any other good links, let me know ...
fordtruck@mediai.com

Lightning Web Site
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99.5 Lightning
Line-X bedliner
Towing Package
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[This message has been edited by Nathan (edited 09-24-1999).]

 

Hi Guys,
Sorry Nathan, I did take the post from the other Tech Forum because it was such a good question. I only changed a few minor things, your the one who really had the great question. I'm glad you came over. Did you get the message from the Tech Forum about this message board, or had you already joined?

Metallic Blue

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1999.5 Black
SVT Lightning
Bone Stock
CD Changer, Tonneau Cover, Class III Tow Hitch.