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Discussion Starter · #1 ·
getting set up for a custom cam.. ive searched and had no luck.. ill continue to search but in the mean time..

intake cc?

combustion chamber cc?

valve diameter?

rocker ratio?

what are the cam specs?
duration intake and exhaust
lift intake and exhaust

when do the valves float...

whats the piston rod length? (not head related i know)

This is on a 87- vg30et with factory aluminum heads..
 

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Discussion Starter · #3 ·
gracious domdogg123~
 

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Author: pavementpounder
Date: Feb 23, 11:06am
Asked:


"getting set up for a custom cam.. ive searched and had no luck.. ill continue to search but in the mean time..

intake cc?

combustion chamber cc?

valve diameter?"


These are variable, and, depends on the machinist and your specifications.


"rocker ratio?"
Good question. Unless you're going exotic, you can't change it.

"what are the cam specs?
duration intake and exhaust
lift intake and exhaust"

This works...


"when do the valves float..."
When the inertia of the valve mass overcomes the spring pressure. A set of Schneider springs will keep them closing, on schedule, up to 10k (way faster than you'll want to turn it).

"whats the piston rod length? (not head related i know)"
The center to center length of the VG30E (or T) connecting rod is 154.15mm/6.07 inches.

"This is on a 87- vg30et with factory aluminum heads.."
As opposed to..... what?????
 

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Discussion Starter · #5 ·
i know you cannot buy any other rocker size, the manufacturer wants to know so they can measure lift after the rocker arms.. think of a chevy... 1.5 or 1.6.. if you take a engine with 1.5 rockers vs and identical engine with 1.6rockers.. the end lift would be higher in the 1.6 engine.. no there is no choice, but they need the info to do there math. as for heads.. i was just being exact.. so not to get questions about some crazy head ive never heard about. as far as cc's of the combustion chamber and intake cc, i was curious of the factory specs.. i know they are not always exact.. but until i get my heads to measure cc's, im curious of a round-a-bouts.

thanks for all the info.. that about answers all my questions~ gracious
 
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