pushrod checker ?

[saltshaker]

I'm going from a hyd cam to a comp 282S in a 428 with factory adjustable rockers. Do I need to check for the correct pushrod length or will the standard (9.157 length work? Jon

[Dwight]

YES

Dwight

[saltshaker]

Dwight, yes to which question?

Originally Posted by Dwight

YES

Dwight

[Dwight]

Sorry yes to checking to length. Ask me how I know.

Dwight

[FWB]

yes check.......comp cams may tell you their set up is for factory length, do not trust this.....check everything. i got a set of lifters that were packaged wrong from them. trust nothing.

[PANAVIA]

Agreed. check legnth. if you don't you will prematurely wear various components depending on long or shortness --and be off on your valve opening geometry.

Pushrods are available in lengths + or - .in minor amounts. ---alternately decking the block or miliing the heads can make a long pushrod "shorter".....(HEHEHEHE)

Steve

[Bill Bess]

My pushrods are 3/8" x 9-3/8" long on my 428 from SA. The motor has alum. heads and roller rockers. I don't know if this helps?

Bill

[cb6577]

I just ran into a pushrod length problem on my 428.I am using comp super roller lifters,mech roller cam, edelbrock heads,ferrea valves and .060 lash caps.Originally I ordered the 9 and 3/8 pushrods from Lunati,they were too long.Lunati does not include the cup when stating the length.so I got a checker from trickflow for 8.3 to 9.3 Inches in length.I determined my motor needed a 8.950 length.Now Smith Bros. pushrods was going to make a custom set for me for 28 $ each.Keep in mind I have 800 lbs of open pressure.So at that price would have been almost 500 bucks a set.So what I done was found a used set of jesel rockers from a nascar cup shop(they are all over ebay) for 100 bucks.They have the adjuster screws that will fit directly in a set of Comp Roller Rockers for FE and allows you to use a ball tip pushrod for the rocker end.Then I found a set of pushrods that were double tapered .125 thickness from another used cup parts vendor and was able to get them for 30$.Not only did it save me some money,but alot of cup motors use a 8.950 length pushrods and every other cam and pushrod company makes them everyday with the ball ends.So if you are ever in a bind there is a good chance jegs or summit has them in stock. The screws I was referring to was from jesel,they use 3/8-24 threads 1.25 inches long and use a 5/16 ball.If you can get ahold of a set of these and change to a double ball ended pushrod it will save you alot of trouble from buying custom pushrods.

[saltshaker]

I purchased a trickflow pushrod checker and found that the cup was to small for the ball end of the rocker.

[cb6577]

The trick flow rod with the cup end is 5/16 cup but probably would get you close enough.On a FE shaft mount rocker system the pushrod length does not have any critical effect on rocker arm geometry like a stud mount rocker.So as long as you are close on the measurement you should be fine.

[Barry_R]

What works best for me is to take that cup checker and trim the cup portion down until it's essentially flat - just a locating divot left in the center. Measure your desired length not forgetting lash - and order your pushrods specifying the length to "bottom of cup". Your pushrods will come in marked as "BOC" next to the length. Easy.