Inline 250 - T3 Turbo - w/ Video

[boucher racing]

Originally Posted by longbed67

x2 compressor surge is a good way to damage equipment (bad idea)....
you can get 250-300hp out of a 250 naturally aspirated 350-400+ range would be a better low boost goal.
Stock heads on the 250 leave a lot to be desired... a few small changes that anyone can do in a home garage can really add some power. After my dealings with SPA and their manifold, I would never use one again!

Not trying to counter-dict or offend Boucher here but you may want to contact C & S carbs about the sizing.... n/a sized carbs DO NOT correlate to Blow through setups! Blow through is a whole different beast.... Also if this is going to be your first serious turbo build you may want to do some research over at theturboforums.com

Good luck with your build!

LongBed, good info on the SPA, I guess there is only one way to find out!

As far as my carb, from a calculation standpoint. You can size your carb for your engine and then multiply it by 1.5. I should have probably used the same carb, just in the 500 cfm model. I found this one for $50 & couldn't pass it up. It does really good at idle and WOT. The only area of struggle is cruise /transitions. I made the mistake of drilling my PVCR's too big from the start. (.078"). My jets in there now are size 57's!

The turbo is a factory takeoff, from a 1987 Grand National, including the wastegate elbow.

Boucher'
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