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I now plan to dig around pick yer part for big V6 and V8 EGR valves. Stepper motor or PWM driven have both been used, I understand, by GM and Ford, respectively. 10% flow from a 5 liter engine would be 50% in my 1 liter engine, assuming the wide open valve is the biggest restriction. The exhaust passage will have to be easily cleanable. What a shame to dump the exhaust heat into cooling water and get no work back for it. I have an Accel 300+ capacitive discharge multistrike ignition that I hope will help get/keep the fire going in hard to ignite conditions.
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