FP dual valve spring and FP2x install questions.

[UofACATS]

I bought these parts used.

The valve springs didn't come with any shims or seats. The original FP ad is gone but I found what it said through countless searches. It says the springs come with dual spring seats, but no mention of the shims. At least that I saw.

How is the seat different than stock? Is it necessary for correct operation? The FP spring fits into the stock seat like the stock spring does. Anyone have a picture of what it looks like?

Can I buy just shims? What size do I need? How many, etc.?

If I install them without shims, (again through search) I hear the recommended rev limit is 8K. That sounds like stock to me, and pretty much a waste of time. Can anyone deny this claim?

The Supertech site was little help.

I've emailed FP on the subject.


Thanks.

 

[phatTSi]

Being as its a dual spring set-up, yes you will need the dual spring seat. If I remember correctly and I may be wrong on this but the FP Dual Spring kit is just the Super Tech kit rebadged. You might want to give FP a call on this, I'm sure they can set you up with some dual spring seats.

 

[UofACATS]

You're correct, the dual spring seats are required as per FP. They are also not available seperately. The seller said they sent me everything that they received from FP.

Now what? I apparently have a set of worthless dual valve springs. Ideas?

 

[UofACATS]

Well, just after I posted this I got ahold of Supertech..

 

[UofACATS]

Shims and dual spring seats ordered. Guess I can add 75bucks to the total cost, but whatever.

 

[UofACATS]

Now, on to shimming the springs for correct install height and pressure over the nose.

FP says:
FPCam2x. Dual valve springs required. This cam needs 280lb of force over the nose of the cam. When using STDuals, you will find that an installed height of 1.470-1.490" is needed.

What shim size did you use to achieve these recommended results?