spark plugs to use

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spark plugs to use

Post  fordmonsta on October 8th 2013, 7:06 pm

lookin for reccomedations on what spark plug to use, its a 552 with ford racing scj heads all I can find is that they use motorcraft agsp series plugs, any help on where to start is appreciated

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Re: spark plugs to use

Post  Lem Evans on October 8th 2013, 7:08 pm

Comp. ratio...rpm & application please?

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Re: spark plugs to use

Post  fordmonsta on October 8th 2013, 7:15 pm

its a pump gas deal 10.25 compression prolly around 6200 shift point at most this is a motor you spec's me a cam for a few months ago lem flat tappet 643/634 lift 260/263 I think

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Re: spark plugs to use

Post  Lem Evans on October 8th 2013, 7:36 pm

AR-3923 should work.

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Re: spark plugs to use

Post  quick 52 on October 8th 2013, 7:47 pm

fordmonsta wrote:its a pump gas deal 10.25 compression prolly around 6200 shift point at most this is a motor you spec's me a cam for a few months ago lem flat tappet 643/634 lift 260/263 I think
use to use the AR3923 but was changing when using nitrous to a AR3934 then try using the 3934 on the streets it performs very well and also runs well at the track motor or nitrous... also who's cam is that

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Re: spark plugs to use

Post  fordmonsta on October 12th 2013, 10:41 am

thanks for the help, that's is a lem evans spec'd cam I think I may have typed it wrong its a 260/263 at .050 and 640/643 lift solid flat tappet

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