Quote:
Originally Posted by ekhaze
I've actually got a Y8 head on a y7 block... Is the HX head a vtec head? What is the dif between the Hx head and the EX head? Are the cams different? Wouldnt i have to use the hx ecu to get the same vtec settings?
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They are both VTEC, but they use it in different ways.
Yeah it's just cam profiling, the VX/HX or VTEC-E system operates sort of in reverse of conventional VTEC. Below 3000 rpm, the engine is running a very sedate cam profile, each secondary inlet valve barely opens. When VTEC "kicks in" the engine basically just switches to the cam profile of the Y7.
For a better explanation,
Well crap, that link didn't provide the jump I wanted. The explanation is at 4m10s