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Old 06-16-2004, 02:47 AM
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Question 305 valve train questions

Hi Guys

I've aquired a 305 engine, which I'm giving a quick check-up before installation, I did a test run and it worked great.
(pls, no comments on the 305 no good, -dump it story. The engine is perfect my this purpose. thx)

Engine has a Crane cams H256 (113901), 206/218@0.050, 0.432"/0.459" camshaft installed.

Currently the cam is installed with what I believe to be the standard springs.

Heads are standard with press in studs.

I was thinking about installing a set of Comp springs that I have, just to make sure they match the cam.

What is the maximum spring pressure I can run on press in studs?

Would it be possible run with Comp Cams 981 springs, 105# seated, 296# open?

Btw I noticed that the standard chain is pretty worn, "+ slack, so it will get changed with a true roller I've got...

But would a such a cam with standard springs wear the gear so much?

To me there are to possible causes:

They installed cam with the old worn gear.... hmm, pretty stupid, but who knows....

Springs are already upgraded versions = no problems with press in studs....

Which head gasket came on these engines?
Mine has a thin ~0.02" steel/copper gasket...??

Thanks for your help

Bjarne

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Old 06-16-2004, 04:26 AM
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The new springs will be ideal for that cam and are compatible with press stud heads. SOME of the new timing sets on the market are quite loose when installed, and with a few miles look very sloppy. The roller chain will be a welcome addition. Stock 305's have the thick composition gaskets from the factory. Looks like someone used the thin gaskets trying to add a little compression ratio. Good luck!
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