nahasapeemapetalon

iTrader: (9)

Yes i have been reading the many posts on this. I have a pushrod length checker tool at home now and plan on checking my pr length. All i have to do is get the cyl top dead center then put the tool in and adjust it to 22 ft lbs.....now i was told by a friend to watch the rocker on the valve to make sure it stays in center through a full rotation? Is this the way to do it? I read someone say something about watching the compression of the lifter..how the heck do u do taht?

Any help please?
I will prly put the 7.400 ones in and watch first.

vettenuts

iTrader: (4)

Get lifter on base circle of cam and against the cam (not being held up by the retainer, so put in the stock pushrod and just press to make sure the lifter doesn't move), install pushrod checker and rocker. Tighten rocker, 22 lb-ft isn't necessary, that only preloads the bolt. I would put 8-10 lb-ft on the rocker. Unscrew the pushrod until it just takes out the clearance, this is your measurement. (Don't go real tight or you may depress the plunger in the lifter). Remove pushrod without turning/moving and read the length via the scale on the pushrod. Measuring end to end is OAL, but the pushrods come in gauge length, they are not the same. Comp has a description of the length definitions on their web site. Repeat for exhaust. Once you have your measured length, add your lifter preload to the length and you obtain the required pushrod.

nahasapeemapetalon

iTrader: (9)

thanks,
how important is it to have lets say 7.35 over 7.40 if 7.35 is the proper length.
Also the ones on there are thunder racing .080....What kind wouldu buy if you would?

PREDATOR-Z

If your heads are unmilled (which they should be unless you have valve reliefs) and with the 233/239; you'll need to run 7.425 p-rods with stock gaskets.
Comp cam Hi energy p-rods come in .025 increaments.

nahasapeemapetalon

iTrader: (9)

the heads are milled 20 thousandsths....what makes you say they should be longer for this spec. cam?? I watched the rocker and with the 7.400 they rock a lot more on the stem, and the 7.35 rocked less and stayed more towards the middle...7.30 bearly moved ithink they are too short...if i had to guess i would guess 7.35 but the 7.4 seemed ok but i noticed a lotta rocker swing. None looked horribly but prly not optimum....

THANKS for your input, im just trying to figure if i should order some today or not...

nahasapeemapetalon

iTrader: (9)

also, what size of pushrods are typ. bought like 5/16, 3/8 etc....

nahasapeemapetalon

iTrader: (9)

haha sorry to post so many times, but also i have a rocker shaft that all the rockers sit in, they should be seated down and set at 22 ft-lbs and at that pointzero lash should be achieved for proper length correct? i did post this on another place but u seem helpful and i want to order today or maybe not order. The length was btwn 7.35 and 7.30 right in middle i would guess so preload brings it to 7.35 pretty much. The rockers didnt look bad or anything form the 7.400s on there tho..i guess im not an expert.

learning experience

PREDATOR-Z

7.35 will be too short.
If your heads are milled .020, then use 7.40 (with stock gasket).

You should put the checker with the cam on the base circle.


What size valves do you have?

nahasapeemapetalon

iTrader: (9)

well the hobag i bought it from never sent me the specs, but he had said they are larger valves....like...maybe 2.08 and 1.60 or something then i think he said 2.02 not sure, bigger tho he said....so the tipping rocker on the stem is fine? It ran fine...seemed to be a little ticking in the front side passenger of engine area not sure what yet...

nahasapeemapetalon

iTrader: (9)

what would it hurt if they are a tad long? it ran fine so the valve couldnt be kept open much right? I dunno im new to this, just seemed like last night at baselobe that the 7.400 was tightly pushed against the rocker b4 the rocker was fully seating on the rocker "bar"

PREDATOR-Z

That cam will not clear 2.08 valves even unmilled.
Shoot that cam will not clear 2.04 valves unmilled with stock gaskets.

Did you check your PTV clearance?
Man you better check asap.

nahasapeemapetalon

iTrader: (9)

how would it not be absolutely running horrible if there wasnt ptv? The valves would be all bent woulnt they? Like i said it ran fine it had to be close?
could the valves be shorter the stems?

PREDATOR-Z

Something not Kosher here. Either you are mistaken about the head specs or I dunno.
What is the cam specs LSA/ICL?
TSP recesses the 2.04 valves to fit that cam for better valve clearance..
I'm puzzled.

nahasapeemapetalon

iTrader: (9)

Yea man im not sure whats in it just hearsay....it must be 2.04 then or something to clear....would u just install the rockers that were in there. He said that someone said it woul dbe fine and then afr said it wouldnt......Who knows, He claimed to have it dynod at 464 so it cant be set too bad.