Originally Posted by sherwood

the GSR was the technological brainchild of honda in the 90's, it featured all the new technologies. the type-r grabbed more accliam as the best though because of it's flawless use of tried and true components and parts.


the head on the GSR is better flowing than the pr3 found on the b16, and with modification should outflow the type-r head quite easily. ontop of that it achieves a higher compression than any pr3 head.

as for the intake side of things the GSR was home to dual intake runners one short for quick response and low end power and a second, longer intake runner for high end flow and power. selection of these runners were controled by the ECU's response to trigger a butterfly valve in the intake manifold at a certain set RPM (the sound of these runners opening is often mistaken for being the sound vtec makes, which in comparison is very soft and exteremly, exteremly hard to hear (like superman-hard))

the differnt intake manifold is the reason that the inlet/TB on the GSR sits 3" lower than an LS or ITR.

the heads, as far as i know, have nearly, if not completely identical intake and exhaust ports and anything that fits the ITR will fit the GSR will fit the LS.

as for ECU's the p72 can control the most things and if you were to use a differnt manifold you could set a different device on that output (such as a shiftlight for a certain RPM)