camshaft q

[Supraboy89]

hey guys did some searching and couldnt find anything on how to spot a na camshaft from a turbo camshaft. ive never worked with a na cam so i dont know what to look for on the cam. the reason i ask is because i was given a head with cams in it. the guy said it was from a turbo motor. i just want to be sure because they dont have very many miles on them according to the guy that gave the head to me. thanks

 

[Kai]

Well you should be able to measure the lobe height on the cam, GTE and GE are different - it won't be exact but should tell you within a reasonable margin of error what they are. Check the EM section of the TSRM for the specs.

 

[hvyman]

Iirc the lift is the same just the duration is different but i dont remember for sure. With a n/a you will have lots of low end and no top end and the other way around for a turbo cam. Tho there is a thread around here somewhere where someone made charts for the difference in them.

Also only the intake cams are different on the 7m.

http://www.cygnusx1.net/Supra/Library/EPC/291420/part.aspx?S=13511
There is the p/n for them tho i cannot remember either weather or not there is p/n's on the cmas but i think there might maybe. Its been a while since i looked that closely to actually remember. Seen a cam didnt look.

 

[Kai]

EM-48 states for cam lobe height:

Intake 7M-GE - 38.16mm
Intake 7M-GTE - 38.35mm
Exhaust - 38.35mm

GTE cam lobes are roughly 0.15 to 0.16mm taller than the GE's.