im slightly new too the z world but i love it. i have an 88 300zx with 137000 on it that i bought for 3800. i like the na part of it but i need to go faster
without spending thousands on a high compression and or stroker build the amount of hp to gain is very limited, the most I've heard of is 160 whp on a stock block, a turbo swap will get you near there to start, my Z31 just put down 315 hp and 416 lbft to the wheel on stock internals
"if I had all the money I ever spent on cars........I'd spend it all on cars" 12.378 in a rusty datsun with a sliping clutch "The Rusty Mistress" 299.3 whp and 305 lbft TQ, 2105 lbs I'm cleaning out my garage, lots fo Z parts, S30, Z31 and Z32 here is my ebay listing http://motors.search.ebay.com/_W0QQsassZevildky if you're looking for something shoot me an e-mail, evildky@bellsouth.net