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Author Topic: Floating valves after cam swap  (Read 593 times)
AkFordfan
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« on: January 19, 2018, 01:13:57 am »

I rebuilt my 347 a few years ago and have been fighting increased valvetrain noise and inconsistent valve floating. The only changes during rebuild were a stud girdle and a cam swap from an e303 to an X303. Last summer I installed new valve springs figuring they were weak. Noise subsided for the first test drive until I put my foot in it. Oil pressure at idle when hot is 50 psi. Engine specs- older Ford racing forged 347 short block, edelbrock performer rpm heads,Ford racing 1.6 roller rockers,knockoff airgap port matched, Holley 670 street avenger. Any help or suggestions would be appreciated. Thanks.
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AkFordfan
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« Reply #1 on: January 19, 2018, 01:31:45 am »

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juiced coupe
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« Reply #2 on: January 19, 2018, 01:49:15 am »

If you replaced them with more Edelbrock springs, they are junk.

I didn't even bother saving the factory springs from my Edelbrock heads.

I'd get the measurements from the retainers and spring cups, and order a set of quality double springs.

A real nice upgrade would be the double LS style spring kit that Ford Strokers sells. Your heads may or may not require cutting down the valve guide to use them.
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Doing more with less, or something like that.
http://sbftech.com/index.php/topic,20009.0.html

Quote from: Monte Smith
Bottom line, if it was the hot ticket, the fast guys would do it.............they don't

You might need some Titanium rods and a flow bench!  LMAO on floor

I honestly don't get it.

I'm sweating, my heart is racing, my clutch foot is twichin', and my right arm punched the computer screen doing an involentary 2-3 shift while reading all that. 
AkFordfan
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« Reply #3 on: January 19, 2018, 02:05:48 am »

I did use the same springs, I was having trouble finding some with similar spring pressure and general size.
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