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Topic Review (Newest First)
12-05-2012 03:11 AM
cobalt327
Quote:
Originally Posted by Mertz View Post
Has anyone used one of these Pro-Form 66789 PUSHROD LENGTH CHECKER- : Amazon.com : Automotive for checking pushrod length? I have read Jim Miller's article about proper valve train geometry and since I am using stamped rockers in my 283 it would not be possible to use his method for setting the rocker height. I am hoping this tool along with the adjustable pushrod will help me set up the valves, rockers and pushrods with the correct and most efficient geometry.
Using just an adjustable pushrod (bought or home made) and some machinist dye, a sharpie, or even some grease will tell you everything you need to know.

Using stamped rockers makes this a little harder to do because sometimes the witness mark isn't as clear on the valve tip, but if you work w/it for a bit you'll get a feel for it.

Start w/the stock length and add/remove length as needed (rarely will you need shorter p-rods).

Good luck.
12-04-2012 02:23 PM
Highball
Pushrod checker

I have one each of the four lengths Chevrolet marketed for their 206,216, both 235's and the 261's. There are times when one older engine will have a longer pushrod than the newer ones do. My Chevy Performance Dealer Desk still has listings for all of this plus they stock factory 261 cams for the 235's if that is what one wants as a street runner. He says he can still produce new in the box 848 head blanks too.
Normbc9
11-27-2012 01:15 PM
engineczar They're ok for a rough check. Depending on the model it's either made for valve lifts of .500 or .600. If your valve opening is more or less then you'll have to do some math. The instructions will give you the formula.

What I don't like about them is that you don't know what rocker arm they're trying to replicate. Stamped, roller. roller tipped?
11-27-2012 09:33 AM
Mertz
Pushrod Checker

Has anyone used one of these
Pro-Form 66789 PUSHROD LENGTH CHECKER- : Amazon.com : Automotive Pro-Form 66789 PUSHROD LENGTH CHECKER- : Amazon.com : Automotive
for checking pushrod length? I have read Jim Miller's article about proper valve train geometry and since I am using stamped rockers in my 283 it would not be possible to use his method for setting the rocker height. I am hoping this tool along with the adjustable pushrod will help me set up the valves, rockers and pushrods with the correct and most efficient geometry.

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