Very useful information on building a 5sfe, mr2.com link Options

[ILoveMySilly97]

I myself have a 5sfe and this is good heads up info if I ever decide and working on building power for my car. Sadly I'm restricted since I live in Cali.

http://www.mr2.com/forums/non-turbo-engine...-induction.html

[Bitter]

I think there's also the issue of the bore vs stroke keeping it from revving. Take a look at all the S series engines that are noted for being able to turn higher RPM and noted for making good power (NA or FI), notice something? Square engines. Bore=stroke and they have a good rod ratio. The 5S is designed from the ground up to be a low revving economy engine. You can get stronger rods and pistons and rev it higher, but it doesn't take to it like other S series engines do. Trying to totally redesign an engine to be something it was never built to be is hard. There's engines that drop right in and off the bat are designed for higher performance which means they take to modifications much better. I think in the end the theory will remain just that as I highly doubt anyone can hit 200whp feasibly. You'd dump in more money than a V6 swap, BEAMS, or 3S-GTE and have a lesser engine still.