Quote:
Originally Posted by rfuerst911sc
I tend to agree there is a trade off with exhaust , I wonder if smaller tube straight headers ( no cats ) help with torque vs. larger diameter ? I made 252 lb ft of torque recently with mine and I have cheap Chinese headers , no cats , cat delete pipes and a stock muffler with PSE style bypass pipes . I also made over 282 hp at the wheels which would suggest my setup flows pretty well . Common sense tells me going with a larger diameter exhaust will yield more HP but " may " give up too much torque . It is a fine line . Have you dyno'd your setup ?
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It's all about what rpm you want max efficientcy & then optimize pipe diameter for that rpm. For street driving I shoot for 3000rpm. Your engine is so unique I would ask JR what you should use. I try to have everything ceramic coated to keep the heat inside also.
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OE engine rebuilt,3.6 litre LN Engineering billet sleeves,triple row IMSB,LN rods. Deep sump oil pan with DT40 oil.
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Mean Motor Scooter
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