valve springs 98 or 03

So I know I have 98 cams going in 03 heads. Which heads have the better valve springs for a turbo application?

I think valve springs have more to do with cam and revs man.

Brian Tooley has very reasonable springs. Been very happy with 2V, 4V and LS springs from him. BTR FORD 4V MODULAR SPRING SET - .500" LIFT - SP008-32

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I have some 98 springs and some 03 springs which ones are better for my application? I'm using 03 heads with 98 cams!!!

Pretty sure they are the same, so I would use the newer springs

I am running DA castings with 98 cams


1996-2005 Ford Valve Springs F6LZ-6513-AB | Auto Nation Ford White Bear Lake

When u say DA castings what do you mean?

98Cobra2020 said:

When u say DA castings what do you mean?

Click to expand...

4v head casting numbers

Hope this helps

This is a pretty good reference as well

Castings

So if it were you run the 03 heads 03 springs and 98 cams?

They’re the same springs. I’d just run the ones with less mileage on them. If unknown or about the same then it doesn’t matter

mvk13 said:

Brian Tooley has very reasonable springs. Been very happy with 2V, 4V and LS springs from him. BTR FORD 4V MODULAR SPRING SET - .500" LIFT - SP008-32

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Click to expand...

Those valve springs are CHEAP compared to Manley, Livernois, etc. Is it a requirement to change out the retainers when you switch to a high rate valve spring?

PAC