Valve Springs?

[BTZ201]

Hi guys, I am slowly working on a sbc 400 build and am using an older set of bowtie 034 heads. Question is as of right now I can only fit a 1.5" valve spring without machining. Anybody know of a good budget spring for a .630 lift solid roller that measures 1.5"?
I'd rather not machine to 1.55" if I dont have to as this is a budget build.
Thanks for any help,
Brent....

[steve cowan]

I dont have a recommendation
But something too consider,and I understand about budget.
A smaller diameter spring with spring locators will use a smaller/ lighter retaininer which is a bonus in my opinion.

[F-BIRD'88]

If you are on a budget use a milder lift solid street roller cam instead of a .630" gross lift race roller

These mechanical SR cams will be in the .585" gross lift range. (1.5 rocker)

There is a good K motion 1.46" dual spring for this.

(7200 ish rpm) These SR cams are available in and duration and LSA you want.. (Custom grind form) Easy easy on parts too.

[Alaskaracer]

Lots of good valve springs that will work for that cam that aren't 1.5". They have 1.5" springs now that have well over 1000lbs on the seat open....I'd give PSI a call, give them your cam specs, and they can recommend the proper spring..

[HDBD]

Comp conicals go in at 1.8 and may work.

[Geoff2]

Yes, conicals. The new world. Less spring tension needed, less stress on the valve train.

[mag2555]

X3 with going with conical's or atleast Behives with matching retainers!
You will get the most out of your Cam this way at all rpms the motor spins at!

[BTZ201]

Thank you for the advice, I will look into PSI and conical springs.
Are pressures on conical the same as standard? I was looking for around 230# seat pressure for my cam, would it be different for conicals?

[Krooser]

Don't think you'll find beehives or conicals with that high pressure.

[HDBD]

Have a look at COMP 7245. At 1.9" installed height it would be right there. It is a conical dual with 600# rate, up to .835 lift or .735 at 1.9 installed height.

[Krooser]

I stand corrected!!!!

[af2]

If you are on a budget use a milder lift solid street roller cam instead of a .630" gross lift race roller

These mechanical SR cams will be in the .585" gross lift range. (1.5 rocker)

There is a good K motion 1.46" dual spring for this.

(7200 ish rpm) These SR cams are available in and duration and LSA you want.. (Custom grind form) Easy easy on parts too.

I wish I still had the picture of the last K Motion springs I ran for 2000 miles. Won't go there again.

[BTZ201]

Ok, so my cam specs are .050 262in 268ex 630 lift on both 106ls, I have found 1.5" springs through competition products for solid roller but seat pressure is a bit low at 180#. Any thoughts on if this will work for me?
The whole motor will be a compromise to some degree, but want to give it a fighting chance. Valves are 2.02 1.6 undercut if that helps.

[ProPower engines]

So how much installed height do you currently have available.??? Not including use of a +.050 offset lock??

[F-BIRD'88]

If you are on a budget use a milder lift solid street roller cam instead of a .630" gross lift race roller

These mechanical SR cams will be in the .585" gross lift range. (1.5 rocker)

There is a good K motion 1.46" dual spring for this.

(7200 ish rpm) These SR cams are available in and duration and LSA you want.. (Custom grind form) Easy easy on parts too.

I wish I still had the picture of the last K Motion springs I ran for 2000 miles. Won't go there again.

I also had some K Motion springs that were a complete disaster . K700. (1.26") ... But the K motion springs specific for the street rollers 1.46" dual do not seem to have a bad reputation.. BaD news travels fast.. They are the K800 spring set.
I hear ya aF2.