mvvette97

iTrader: (18)

I need to know what the base circle is on this cam. When I installed it I didn't think to check. I called Comp and for some reason they didn't know. I think my pushrods may be too short.

redtail2426

iTrader: (10)

i have it,tell me if your heads have been milled and what head gasket you are running and i will figure out exactly what you need.

mvvette97

iTrader: (18)

Cool, thanks alot man. The heads are stock never been off the car. Stock rockers. Just the cam.

redtail2426

iTrader: (10)

then you need 7.425,if you want me to do a rundown on the math i can for ya,or you can just take my word for it.

redtail2426

iTrader: (10)

and i think comp is the only one that sells then in that length.

mvvette97

iTrader: (18)

could ya just tell me what the base circle is? I have been searching for that for a while. You don't have to explain the process because I believe ya

mvvette97

iTrader: (18)

I have the 7.4s now and I have a shitload of ticking. Why does everybody say to go with the 7.4s when in fact they are too short?

redtail2426

iTrader: (10)

haha yeah,,

the base cirlce radius is .732
base circle diameter is 1.463

and stock pushrods average out to be about 7.395,what i did was measure like 6 or 8 of them and average it together..

just for the hell of it my stock cam radius was .775 and the diameter was 1.550

redtail2426

iTrader: (10)

most people will tell you to get the 7.4's because they are easy to get your hands on a set and most people dont know any better,you are running with to little preload right now,which is why it is ticking real bad.

mvvette97

iTrader: (18)

maybe this is the ticking problem that I have had since the install. Is your quiet?

mvvette97

iTrader: (18)

mine is so loud that I can even hear it in the car. Everybody tells me that is normal but I just can't believe that.

redtail2426

iTrader: (10)

mine ticks a little but its not bad at all,when the hood is closed and i stand directly over the hood,i cant hear a thing except my intake pulling in air,if i pop the hood and put my head over it,yeah it ticks but not really any worse then when the car was bone stock.i was suprised with how quite it was.

mvvette97

iTrader: (18)

Anyway thanks alot for your help. This is what I've been needing to know for 2 months now. Again, thanks

redtail2426

iTrader: (10)

yeah just get some 7.425's ,,if it still ticks real bad then you will at least know that its not the pushrods.some springs are louder then others to.

mvvette97

iTrader: (18)

yea, I noticed it didn't seem to be as loud when I had the 918s. I just feel better having the patriot duals on.

vettenuts

iTrader: (4)

Didn't you start with the longer pushrods?

mvvette97

iTrader: (18)

yea i did. then I sold them and bought the 7.4s and have the loudest valvetrain. I'm pretty sure the reason for the springs breaking the first time was just because of the springs. Think I shopuld of stayed stock.

Meegle

Have you checked your lifter preload? .060-.070 would be ideal.
redtail2426 is correct in his recommendation of longer pushrods (7.425) which should give you .030 additional preload and hopefully calm/stop your noise issue.