Re: Notes on the XD cam from Professor Ko
Well, I've already decided that the 1.8L cam is better than the XD cam. In addition to the problems mentioned by Professor Ko, there's a cam timing issue. Although the XD and 1.8L cams both have 232 degrees of duration, the opening an closing events are different by 3 degrees. (See: http://www.hyundaiperformance.com/forums/topic.php?t=13959). You give up .389 mm of lift with the 1.8L cam, but more than make up for it with the better timing. I had an XD cam in my '96 Elantra (1.8L) and noticed a loss off power with the "butt dyno". I put the stock 1.8L cam back in and felt a power increase. I have an XD cam in my '01 Tib right now and am going to dyno my car with it then re-dyno with a 1.8L cam.
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Aaron Britt
'06 350Z (Farking lemon)
'06 Elantra GLS hatch
'87 Nissan Hardbody - The "Mud Mobile" (448,000 miles and still counting)
'02 Derbi GP1 scooter
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