valve lengths

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valve lengths

Post  fordmonsta on May 20th 2015, 3:32 pm

Does anybody know the stock lengths on the frpp scj heads needing some about .100 longer for more lift

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Re: valve lengths

Post  rmcomprandy on May 20th 2015, 3:57 pm

fordmonsta wrote:Does anybody know the stock lengths on the frpp scj heads needing some about .100 longer for more lift

An intake valve .100"" longer will not work well in an SCJ head. The valve tip gets to close to the intake stud for rocker arm fitment.  I have done it but, using a Small Block Ford intake rocker arm.

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Re: valve lengths

Post  fordmonsta on May 20th 2015, 4:52 pm

I'm looking for more installed height right now I'm at 1.900 with a 636/663 lift cam I'm fixin to swap from it to a solid roller with .740/745 is that doable with the right spring

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Re: valve lengths

Post  dfree383 on May 20th 2015, 4:55 pm

You should be able it pickup .050 with some retainers and .050 with proper locks.

You need proper springs to install at 1.95 or 2.0
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Re: valve lengths

Post  Lem Evans on May 20th 2015, 5:05 pm


Get a cam with ~.700" lift and use the SCJB springs.

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Re: valve lengths

Post  fordmonsta on May 20th 2015, 6:17 pm

I'm running a plus .050 lock alreadythe retainers are a 741 comp locks are 614 comps

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Re: valve lengths

Post  Lem Evans on May 20th 2015, 7:29 pm


You will need a plus retainer also, if you just have to have that much lift.

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