Cam Lobe Height Differences, D15B and D15B7
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Cam Lobe Height Differences, D15B and D15B7
I have a JDM D15B non-vtec MPFI (formerly dual-carb'd) installed in my 1993 Civic DX.
From studying a number of shop manuals, it seems like the camshaft on this non-vtec D15B is different from the camshaft of a D15B7. A stock USDM D15B7 is MPFI. The cam lobe heights and valve spring free lengths seem to be different for the D15B and D15B7.
Best guess now for the cam lobe height specs is:
D15B intake and exhaust = 36.603 and 36.747, mm
D15B7 intake and exhaust = 36.957 and 36.996, mm
The other valve and cam specs for the two heads seem to be the same.
I am wondering if mixing the MPFI modification with the formerly dual carburetor intake and head design features throws things off so my 93 Civic DX does not get optimal fuel economy. Maybe splitting hairs. Please share your knowledge.
From studying a number of shop manuals, it seems like the camshaft on this non-vtec D15B is different from the camshaft of a D15B7. A stock USDM D15B7 is MPFI. The cam lobe heights and valve spring free lengths seem to be different for the D15B and D15B7.
Best guess now for the cam lobe height specs is:
D15B intake and exhaust = 36.603 and 36.747, mm
D15B7 intake and exhaust = 36.957 and 36.996, mm
The other valve and cam specs for the two heads seem to be the same.
I am wondering if mixing the MPFI modification with the formerly dual carburetor intake and head design features throws things off so my 93 Civic DX does not get optimal fuel economy. Maybe splitting hairs. Please share your knowledge.
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