CSpencer04

I'm installing a mild voodoo cam in my freshly rebuilt 5.3 is it really necsasary to check the pushrod height? I haven't changed anything but the cam. I do want new pushrods which ones are yall running? I'm thinking lunati or tsp. Thanks for your input and replies!

006rcsb

i think you would want a hardened 7.4 inch pushrod, alot of guys here like the comp pushrods, but im sure the lunati's or tsp's would be good also.

budhayes3

iTrader: (19)

The cam manufacturers usually recommend 7.4 length pushrods which are what everyone that I know of runs with a cam only swap. If the heads have been milled or the lifters replaced you'll want to invest in a pushrod length checker to be sure.

fastgmc53

iTrader: (33)

i did just change from 7.350's to 7.375's thinking I needed the longer ones... cant tell a bit of difference... still runs like poo at low speeds..... waitin on valve springs and then takin the asa cam outta the ecsb

tarinitup

iTrader: (11)

I ran 7.4 for a long time and when my engine was torn apart for refresh it was determined that I needed 7.425. The engine seems to have less valvetrain noise but aside from that performance is the same.

smokeshow

iTrader: (16)

Preload is right on with my 7.350" pushrods... Plenty of deviation from their 7.400 and 7.425 rods. You need a length checker. Better to be safe than sorry.

Sales2@Texas-speed

iTrader: (5)

Exactly! We've installed basic 224R camshafts that if you made a thread about what length many would swear it should be 7.400" (stock long-block, just a cam swap), and they required as short as 7.350" to setup the preload properly! It is a $20 well spent for the tool to check this!

1slow01Z71

iTrader: (36)

Ive got a set of 7.350s and 7.400s for sale in the classifieds both sets are TSP brand.

TrickyTransAm

Matt - I bought the Pushrod checker from Comp.
It's not very friendly to use since the base sits below the heads surface, so you have to do trial and error in/out.
Are you guys using the adjustable pushrod set to a specific value and then using machinist blue dye to characterize the rocker arm wipe pattern on the stem?
And if so...how do you avoid the large smear of a stock rocker arm?
I'm sure it can be done...but what's the trick?

I'm trying to figure mine out. All the methods online are getting confusing, I wish there was a tried and true method.

Sales2@Texas-speed

iTrader: (5)

Yes, we ballpark the length to start and then have to remove/adjust/remove/adjust

Are you asking how to check your swipe pattern to see if you need to shim the pedestals??