cam and valve springs

[JBeenken]

I was originally going to go with the F303 cam but cannot afford to put on double springs with all the fixings I was wondering if an E303 cam requires a double spring and if not which single spring can I use, I am also going to go with 1.6 roller rockers

 

[Rootus]

No cam requires a double spring. Which heads are going to be using?

 

[TMC]

Do you have stock heads?

IMO the stock valve springs are not enough for the stock cam with the stock rockers. Please don't put a larger cam in without upgrading the springs.

 

[JBeenken]

I am using a set of Gt40 heads that have been ported and polished, I have been told by a couple of people that work at Jegs that I need a double for that application. are they liers?

 

[Grn92LX]

If the springs are original ford springs, you'll NEED new ones to do it right. $125 springs now vs valve float, piston hitting the valve possibly having to pull the shortblock for a teardown/rebuild AND repairing the heads? Hmm, you pick The right valve spring is VERY VERY important!! I bought a set of double springs from Ed C for use with his cam. They were pretty easy to install, hardest part was screwing the compressor fitting in the spark plug hole. Its a labor intensive job though. You'll need to rent a valve spring tool.