allpr0h wrote:ahoy
i had a big port engine with t-vis that starved oil i hate myself and burnt seals.
now i have a red top small port non t-vis swapped in, i see on Bill Sherwood's stock 4age page that the big port engine came with different intake/exhaust cams than those of the small port, hrm hrm
can i take out the cams from my big port head and put them on my small port head so it lifts higher and longer so i have more power and would be cool hybrid
also i read terms like EVO BBDC EVC ATDC and VO BTDC IVC ABDC
could someone refer me a good place to learn what it means?
i also have adjustable cam pulleys for both intake and exhaust cams
im new to engine inside... but im willing to learn
any advice would be very appreciated
thanks
nate
Welcome Nate.....
Yes you can put the earlier cams in...... they may, or may not provide you with more power. Why? Because their difference is very small. The early cam is open 240 degrees of a possible 720, while the newer cam is open 232 degrees of a possible 720. There is a bit more lift to the earlier cam, but an unported head can't really utilize the extra lift well. So, in the end...
you might see 1 or 2 more hp.
EVO - exhaust valve open (the instant, or degree the valve opens)
BBDC - before bottom dead center
EVC - exhaust valve closing (the instant, or degree the valve closes)
ATDC - after top dead center
BTDC - before top dead center
ABDC - after bottom dead center
IVC - intake valve closing (the instant, or degree the valve closes)
that leaves VO, which is actually IVO - intake valve open (the instant, or degree the valve opens)
