it's actually 15 mph.

 

Yeah that's what I meant...thanks.

 

well these are just safetey features, look at the dodge neon, i was driving a friends and it would not rev above like 3500 in neutral. anyhow there are plenty of factors that can come into play to limit the use of vtec but there is only one thing that starts the "chain reaction" of vtec. it all starts with the oil pressure.

 

I've read that minor mods like intake, header, exhaust have better results with the i-vtec motors.

 

I think this probably has more to do with the higher displacements of the K20 than i-VTEC.

 

:werd:

 

So Ivtec is Vtec and VTC combined? Oil pressure of course is what helps start it but I-vtec is the advancement and retardation of the intake cam to adjust overlay and such for fuel economy and power along the band? Vtec is just the oil pressure causing a different set of cams to open and close the valves faster and long and VTC is the variable cam timing? Please correct me if im wrong...

 

i dont think so, accords dont benefit that much from minor mods. neither do crv's. one is a bigger displacement and the other is the same size as the k20.

 

They would probably benefit more than Civics with 1.6 or 1.5 L. Really the relevant parameter is the flow rate of air into the engine, which is a function of RPM and displacement. Since the K20 is a higher rev engine than the Accord or CR-V engine, so it would see more benefits. Subaru's, for instance, are 2.5 L and they see up to 15 HP from intake and exhaust alone, and most V8's see pretty large power gains from exhaust mods as well.

 

true but all of those motors beneit greatly from more air. I think it is more of the variable intake cam then the displacement. it still gains great amounts of power within the rpm range of the crv and accord. Saying what you are saying is equivilent to saying that when i bore my b18 over to a b20(same rpm basically) that i will see like a 15 hp gain over the .2 liters that i used to not have just from bolt-ons