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Old 09-30-2010, 06:14 PM   #3 (permalink)
Meph
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Join Date: Apr 2008
Location: ontario
Posts: 84

240Z - '73 Datsun 240Z 240Z
90 day: 34.41 mpg (US)
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Ive tried out driving with +4 and +4 and did seem to notice a little bit mroe torque down low, nothing very substantial. As I advanced the intake cam, that controls engine timing I will need to recalibrate my ignition timing aswell.

Ive been reading differnt threads on here and opnions seem devided over advancing or retarding cams to get best results. On a stock car with Variable Valve Timing I believe they advance the exhaust cam in low rpm and retard it in high rpm?

Ignoring the intake cam, would and advance solely in the exhaust cam result in more torque and theoretically more MPG in the 1500-2200 rpm range of an engine with a redline of 7000. Later variation of my engine had vvt on the exhaust cam.

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Last edited by Meph; 09-30-2010 at 06:24 PM..
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