Quote:
Originally posted by Xtopher:
How do you get the 20 hp per lb of boost?
there is ~15 psi at sea level for 180 hp.
This puts the na motor at 12hp / lb.
The sc adds heat to the mix, so timing has to be retarded and premium burned..
Keep in mind, it takes hp to compress that much air / flow rate..
~5hp / lb isn't that bad for a 3.3 after the losses.
The heads are not designed for high hp, not smooth enough flow. The cams are designed more for torque then HP. Get a 5.0 mustang with other goodies, and you may make 30hp/lb..
I guess I didn't take in into account that the HP/lb of boost varies on several other things.

However, the 300ZXTT has a compression ratio of 8.5:1 and runs 9.5 psi and produces 300 HP and 284 lb/tq. The N/A version makes 222 HP at 10.5:1 so we know the TT version makes CONSIDERABLE less all motor at 8.5:1.

I think this is a bit closer to my estimate of ~20 HP/ lb of boost but not 100% accurate.