The Comp 918s are just fine for that cam. As you mentioned, it is one of the best springs for the LS1 in terms of valvetrain stability.

It is what I use on 90% of the "smaller" cam applications.

Good luck with your install.

Jason

 

A recent issue of Car Craft had the part numbers for the different length bolts and what engines use them. When I get home I can get the info.

 

The 918's... I think they're a great spring. I ran them for a few days on my stock cam - they were perfectly quiet. It may have been a 'good day' for the truck, but I thought I noticed more power up high. I'm currently running them with my .531" VHP cam.

I think the 114 LSA on this spec'd cam will give you EXCELLENT power down low. At times I wish mine had a hair more lowend so I can brag about fuel economy again. Since I got the Dynatech headers on, the cam is stronger throughout the entire range.

FWIW: VHP might actually recommend the VHP/Crane duals (good for .650) with this cam. I know they will if you step up to the rocker package - the rockers supposedly need the higher pressure of the spring.

I think for what you're after, you're just aboud dead-nuts on. But I'm a little biased - I'm working on something very similar.

 

I forgot to say ... if you're running the 918's I wouldn't use those stock pushrods. You might have a pushrod or 2 end up bent. With that small of a cam, you would need some 7.35" pushrods.

 

moregrip: Thanks for the offer !!!, I think I have it covered though because my Father is here on vacation that weekend and I'm gonna put his *** to work helping me do the install

Fandango: Studs are good.....I'm looking into them

trdumm: YES PLEASE !!!!!

marc_w: Thanks.....there's been alot of research to get to this point, I'm hoping I'll achieve my goals

Flyer: Why the smaller pushrod ??....the base circle of the cam is the same as stock and I'm not using LS6 valves, shouldn't the pushrod length stay the same ??

 

That is the same length pushrod as stock. 7.40 is about 40 thousandths LONGER than stock. I measured it and it's about the thickness of a penny.

7.40 is recommended for bigger cams. It's written on that print up you printed out. I think it goes something like you will need 7.40 pushrods unless you have a small cam or milled heads, in which case you would need a 7.35.

I found this out from experience. The londer pushrods will give you a shitty idle and poor low end performance.

 

I'm running 7.4's on my version of that cam...

I don't remember the base circle sizes of my stocker, the TR220, or this cam (I know they're out here somewhere on the site)... but as an example, say the stock was represented by the number "2", the TR220 (which runs the 7.4's) was a "1" - the VHP cam was around a "1.25".

I made a little point of this in a thread, and I believe someone from VHP said that they design them like this for a little more preload for a quieter valvetrain? I'll try to dig it up.

I can try to find time to toss in the stock 7.35's... but I'm not certain I'll need to.

 

Quoting myself: I got this info word-of-mouth: I think that's why I got away with the 7.4's, and the base circle was off slightly from the common XE or XE-R style 7.4-pushrod running lobes...

 

Stock pushrod is 7.38" long. the base circle is smaller on the new cam I'd imagine, so a slightly longer 7.40" pushrod would be fine. I'm running 7.4s with my comp XE .563 lift cam.

 

So...what you are saying is I want to stay with a stock length (7.35") but a hardened pushrod...is that correct ??