Quote:
Originally Posted by 86TOYO2k17
They all build boost with RPM, a centrifugal SC will build boost more progressively though, a PD blower is less progressive but still builds more boost with RPM as you rev out.
a PD blower can flatline torque, and people have made over 400whp on PD blowers.
You don't feel HP you feel torque, the rate of rpm change or acceleration is determined by torque. HP is a derivative of torque. if a car make more top end HP that is because it makes more torque at that RPM.
A PD style blower gives you a lot more options for configuration in how you want your power delivery. you could flatline torque and it will just pull all the way through to redline, you could purposely detune the low/mid range to limit peak torque but then keep top end torque somewhat higher and more closely mirror a centrifugal blowers power delivery.
If both setups make 300whp peak the PD would walk all over the centrifugal.
Is there a torque limit you feel comfortable reaching?
A PD blower is pretty much better in almost every way for a DD/street car
A centrifugal blower will most likely be better for tracking as they are a little more efficient (less work for same power) at top end and you can run an air to air cooler and not worry about heat soak as much like an air to water setup usually suffers from. There are options for preventing heat soak on air to water but it adds cost and complexity.
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I’m comfortable reaching around 220lbft once I pull the trigger on a SC. I’m installing a stock clutch atm (current clutch/flywheel is way aggressive for my current NA setup), and hope to run that OEM clutch and stock internals for a while, so 220 will be plenty for me. As I said I love the top end my EL headers are giving me at the moment, so I may enjoy a rotrex unit like a Jackson C30, but low torque sounds nice too. I would love to ride along with some other Seattle-area 86 owners and see how PD vs centrifugal feel first-hand but I have no idea how I’d go about setting that up. I appreciate your input