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Hi, ive installed S4 cams about 2 weeks ago. After 10mins. of cams install we have tested cylinder compression. 12bar everywhere. After a week of break in the cams, we have tested compression again - 10 bar on all four. Anyone know whats the problem? Manual says 12.75 standart, 10.78 minimum.
PS: Its JDM 10:1 DE, stock ECU. It was on 16° for a week and change it to 15° as JWT recomend. Running 100octan fuel (93 RON in USA?).
i do know bigger cams lower your compression, but u did state that u did a compression test right after, and then 1 week after. im not 100% sure what would cause that.
do a leak down test to single out the problem
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Old set-up: 91 se-r sr20de+T 13.04@110mph w/ a t25....
New set-up: same car, but with a gti-r motor and a gt28r. New LOWER times coming soon!
Manual says 12.75 standart, 10.78 minimum.
Thanks guys.
