TPITuned Port Injection discussion and questions. LB9 and L98 tech, porting, tuning, and bolt-on aftermarket products.
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What is the difference between siamesed and big bore runners? Is it where the power is at in the rpm curve? Is one better to start with than the other (as in before having and port work done)? I'm still new to all this, so any info would be good.
Mike
__________________ Suspension - far from stock, Brakes - far from stock Drivetrain - upgraded, Engine - bolt ons
Check out the sticky post entitled "Quest for a better flowing TPI" at the top of the TPI forum. We dynoed my car with fully-siamesed SLP runners and with TPIS/AS&M large tube runners. The SLP runners made more horsepower at higher RPM, while the large tube runners made more torque. Its your choice which you want.
