Valve clearance question

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Valve clearance question

Post  blown473 on January 7th 2013, 10:46 pm

Running a FRRP 514 short block with it's dish style pistons, and topping it with Blue Thunder open chamber 100cc raised port Ford exhaust heads, valves are 2.25 intakes & 1.88 exhausts. Cam is a Crower hyd, specs are intake 574/290 exhaust 567/296 LC is 108. I was planning on clay testing the clearance, but thought I would see if anyone on the forum had run anything similar . This is my old top end from my 473, just switching it over to the 514. Had no clearance issues with TRW/Speed Pro L2404F . Head gaskets were ICS Titan copper 043 thick. Any input is always appreciated.

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Re: Valve clearance question

Post  c.evans on January 7th 2013, 11:54 pm

You better clay !!! You will have RADIAL clearance issues.

Uncle Charlie

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Re: Valve clearance question

Post  blown473 on January 8th 2013, 8:45 am

Thanks Charlie, I kind of figured with the large valves & where Blue Thunder set them there could be issues. That's one of the reasons that I haven't ordered my head gaskets yet either, I'm going to test with the old copper, and see if thicker is needed as well.

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Re: Valve clearance question

Post  rmcomprandy on January 8th 2013, 10:30 am

IF it is a legitimate FRPP 514, running those heads will get you about 8.5/1 compression ratio if that is what you are looking to get, or not.

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Re: Valve clearance question

Post  Paul Kane on January 8th 2013, 2:19 pm

rmcomprandy wrote:IF it is a legitimate FRPP 514, running those heads will get you about 8.5/1 compression ratio if that is what you are looking to get, or not.
8-71 on gas. Wink
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