Just as the subject says.

Will they work ok with stock L98 heads. Maybe with screw-in studs. Or would they be ok with the stock studs.

Comp Conical Valvesprings

Thanks.

Oh yeah, I will be using 1.5 RR's. The hot cam I think has a max lift of .492 with 1.5's if im correct.

 

find out what spring specs the cam requires and buy a set from comp or lunati to match the specs. if you're going to or considering screw in studs it'd be foolish not to machine the spring seats bigger. i'd stay away from the conical springs, just seems like a way around doing the job the right way. same goes for using pull out studs, there's no real reason not to use screw in studs.

 

The lift would be .492 w/1.5:1 rockers. But, they always recommend 1.6:1 with it, making the lift .525 ( http://www.sdpc2000.com/cart.asp?act...d=989&pid=1087 ).

 

I have a guy that is going to do the screw-in studs with the heads on the block. I just wasnt wanting to do any machine work right now on the heads.

Do you think the spring rate would be ok with the cam lift?

 

Thanks, thats what I thought.

I figured that the LT4 Hotcam would work good with the L98 heads with using the .492 lift and a stock bottom end. Of course I am running a carb and not a TPI.

 

you have to machine .4 off the stud boss to use screw in studs. there are cutters to do it without a mill just like there are cutters for the spring seats that wouldn't require a mill.

 

There are also non-shoulder screw-in studs available.

I don't think I'd do that kind of work with the heads on the car, though.

 

Yeah, the non sholder studs were the ones I was going to use.

The key to taping the heads while on the motor is using grease on the drill and the tap. Also placing towels or rags in the right places help. I think someone posted a article on it here at thirdgen.

 

I thought it over, and think I will just run the stock bottom end and heads this season.

Car craft has a buildup of the GM 350 HO motor. It has vortec heads and is running the Lt4 Hot cam with 1.6 rr's. They are getting 401 HP and 428 TQ.

Im thinking of doing this to the L98 long block. Should be somewhat close to those numbers. The L98 will have more compression than the HO motor.

What do you guys think?

 

Yess do it, I am glad to see that someone else is going to use 1.5 rockers, besides the vortec heads flow best around .5 lift anyway. I have 1.5 aluminum RR with my vortec heads and hot cam and it runs like a beast!! I am using comp 981-16 sprins and have had no problems, it still revs up to 6000+ easy.