Ok, the car in the signature has TF push rods, 7.200 I think, How do you know if they are the correct length? I recieved them in the car and would like to make sure they are correct, if not then I'd like to know where to begin to find out what I do need..

Thanks,
Brendan


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1987 IROC-Z L98,SR,EB 6085's,LPE 219/219 Cam, Crane 1.6RR, EB TPI Base, 58mm TB, Stock T5, 30lb SVO, AFPR, K&N, EB TES, Catco Cat, 3" Borla Cat-Back, Accel cap,rotor,distro/other crap, Aluminum DS, 94 Disk Rear, Adjustable Prop Valve, Precision 3.73 Gears, Weld in Sub-Frame Connectors, Hotchkis LCA's, KYB Shocks/Struts, Poly Bushings all over the place, Moog Upper/Lower Ball joints and Tie Rods ends/Idler Arm, Big stereo, 730SD Conversion.

To see the ROC, Check out the webpage Here

 

Buy a pushrod length checker from summit.

 

What he said.

• 1. Dummy in one valve of each kind, with its lifter and the adjustable push rod. It's easier to do this with a solid lifter if you can, but you can usually get away with a hydraulic if you have to.
• 2. Put a smear of gear marking compound or white lithium grease on the valve stem tip.
• 3. Set the push rod to the stock length.
• 4. Install the rocker, being careful not to let it move around on the valve stem, so that it will leave a clear mark during the next step.
• 5. If you're using a hydraulic lifter, adjust it until all of the lifter preload is taken up, with as close to zero lash as possible.
• 6. Rotate the engine by hand through one full cycle (2 crank rotations.)
• 7. Carefully remove the rocker without letting it move on the tip of the valve.
• 8. Measure the distance the tip of the rocker moved across the valve stem with a micrometer.
• 9. Repeat steps 2-8 with the push rod set to different lengths that you can actually buy (these will be in even .050" increments such as 7.200", 7.250", 7.300", etc.) until you find the length that results in the smallest contact pattern.

This obviously corresponds to the best centering of the rocker in its motion; that is, neither tipped too far back, nor raised up too far. Chances are you will find that your optimum push rod length is longer than stock; more than likely it will turn out to be either .050" or .100" longer than stock.

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