Checking correct pushrod lenght - theory -
Drifting
Joined: Dec 2005
Posts: 1,313
Likes: 2
From: High Ridge Missouri
A couple of the specs copied directly from Hot cam spec page
GENERAL SPECIFICATIONS
Part Number: 24502586
Engine Application: SBC - Gen 1, Gen1E, and Gen 2 1986 to present.
Lifter Type: Hydraulic Roller
Engine RPM Range: 1500-5500
What a cam will pull to (provide power to) is not the same as it's optimum operating range.
GENERAL SPECIFICATIONS
Part Number: 24502586
Engine Application: SBC - Gen 1, Gen1E, and Gen 2 1986 to present.
Lifter Type: Hydraulic Roller
Engine RPM Range: 1500-5500
What a cam will pull to (provide power to) is not the same as it's optimum operating range.
Le Mans Master
Joined: May 2007
Posts: 8,448
Likes: 27
From: Valparaiso
A couple of the specs copied directly from Hot cam spec page
GENERAL SPECIFICATIONS
Part Number: 24502586
Engine Application: SBC - Gen 1, Gen1E, and Gen 2 1986 to present.
Lifter Type: Hydraulic Roller
Engine RPM Range: 1500-5500
What a cam will pull to (provide power to) is not the same as it's optimum operating range.
GENERAL SPECIFICATIONS
Part Number: 24502586
Engine Application: SBC - Gen 1, Gen1E, and Gen 2 1986 to present.
Lifter Type: Hydraulic Roller
Engine RPM Range: 1500-5500
What a cam will pull to (provide power to) is not the same as it's optimum operating range.
...but that's the same operating range as the ZZ4
how strange !!!
why they both have the same O.R. ?
Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
I used an adjustable pushrod to establish the correct length and followed CompCams instructions for determining the correct length. That consists of monitoring the in-board, center, out-board, center, in-board movement of the roller rocker tip.
Jake
Racer
Joined: Oct 2007
Posts: 478
Likes: 1
There are quite a number of engine builders who will say the CompCams method is not the way to do it. They refer the mid-lift theory. It transfers the profile of the cam to the valve a lot better. I will be using the mid-lift theory.
Drifting
Joined: Dec 2005
Posts: 1,313
Likes: 2
From: High Ridge Missouri
Tried your mom's d@#$chebag but it just ate straight through thorugh the aluminum and left me with the same thing that ran down her leg after your conception.
You've been a member for a WHOLE MONTH, keep you @#$#$@%% opinions to youself unless they're useful, which I doubt anything you have to say is. F----'n NOOB
You've been a member for a WHOLE MONTH, keep you @#$#$@%% opinions to youself unless they're useful, which I doubt anything you have to say is. F----'n NOOB
Last edited by ultraviolet70; Oct 15, 2008 at 01:40 AM.
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Le Mans Master
Joined: Feb 2000
Posts: 9,715
Likes: 27
From: Kempner Texas
Best I can do is pass it along; take it or leave it.
Jake
Drifting
Joined: Jul 2007
Posts: 1,293
Likes: 36
Damn
That wasn't called for......
.......but it was funny as hell.....
That wasn't called for......
.......but it was funny as hell.....
Tried your mom's d@#$chebag but it just ate straight through thorugh the aluminum and left me with the same thing that ran down her leg after your conception.
You've been a member for a WHOLE MONTH, keep you @#$#$@%% opinions to youself unless they're useful, which I doubt anything you have to say is. F----'n NOOB
You've been a member for a WHOLE MONTH, keep you @#$#$@%% opinions to youself unless they're useful, which I doubt anything you have to say is. F----'n NOOB
Race Director
Joined: Jan 2008
Posts: 16,027
Likes: 170
From: oregon
basically what i thought as well. i looked at those pictures and am of the opinion that it will flow better than stock. any improvement is just that, improvement, not something to make a cheap attempt at humor. we don't really know how the hand file comment was meant though, it could have been in jest. i've been known to say wild stuff like that around the shop. as to the pushrods measuring small base circle cams or longer valves is a great idea. my post before about the common 7.150 and 7.200 lengths is only for roller blocks with stock base circle cams and stock length valves. which brings up another point, it isn't aftermarket heads that create pushrod issues {provided they are 23deg} it's the valves. changes in valve length ALWAYS effect pushrod length.
Team Owner
Joined: Dec 2000
Posts: 21,094
Likes: 282
From: Phila., PA burbs
