VALVE SPRING QUESTION

[CFD244]

Hi Folks

I bought a set of fresh 2.02 heads. They have the following brand new springs on them..
Dual Valve Springs: 1.437

The cam that I am using calls for a much lighter spring....
Xtreme Energy 218/224 Hydraulic Flat Cam for Chrysler 273-360

Single Outer Valve Springs: 1.494

Would the heavier springs be a bad mix for this cam?

Thanks

 

[RustyRatRod]

That 115 on the seat @ 1.7". What's your assemble spring height?

 

[4spdragtop]

Be careful that the open pressure isnt too high as it may wipe a lobe. Too little seat and you could float.
I noticed heights, spring rates and seat psi are different? Comp has a chart on their site that compares all aspects of their springs.

 

[K.O. SWINGER]

it's a little more spring than you need but In my opinion it's a pretty good match, but you will have to be careful on the break-in.

 

[Murray]

To reduce wear- don't over spring it.

 

[CFD244]

That 115 on the seat @ 1.7". What's your assemble spring height?

Machinists notes say 1.70 installed, 120lbs on the seat and 300lbs @1.180.

 

[CFD244]

it's a little more spring than you need but In my opinion it's a pretty good match, but you will have to be careful on the break-in.

What needs to be done to "be careful during break in"?

 

[K.O. SWINGER]

I would use a high zinc content break in oil I have had good luck with Valvoline race 30 with a high quality cam break in lubricant I've used lunati . also highly suggest removing the center spring during break-in. I have broken new cams with that spring pressure before without removing the center spring but I can't advise it.