Originally posted by cougar694u
I'm not questioning you in any way, but what did it say the cam specs were measured at? I'm asking because the specs don't add up, maybe I'm being a dumbass today???? With IVO at 3* BTDC and IVC at 29* ABDC, that's 212* (180* + 29* + 3*) duration on the intake side. The exhaust is measuring 228* duration. It's odd because according to the specs the exhaust cam has more duration, which is common on V8's, but not I4's, but it's listed as have 4* more on intake side. It was funny to me, so I entered them into Desktop Dyno, and it showed the 212/228. Even if the measurements were at .050", it's still wrong, according to the card. Where's this extra 16* duration on exhaust side coming from? The overlap actually isn't that great, either. I'm wondering if the cams were measured at something like .025", but that still doesn't explain the exhaust cam. Maybe the specs on the card are wrong. Can anybody shed some light on this??