Jetting?

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05-13-2004, 06:44 PM

jryan26

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Jetting?

I have 540s with merlin intakes, and holley 800cfms. The carbs have the stock staggered jets. I am running the crane 741. Do any of you have a similiar set up? If so, what jets are you using? I was thinking of starting with 81/92. Thanks

05-13-2004, 08:12 PM

Johno

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Hp 500 509cu", Merlin intake, 800 holley & Crane 731 cam. Sea level 85/96 stock power vlave

05-13-2004, 08:23 PM

jryan26

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Thanks Johno
How did you come up with that combo? Did you try several different jets? Thanks

05-13-2004, 08:23 PM

seahawk

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509/crane 731 cam merlin intake holley 830 w/ 93/93 jets 6.5 power valve

05-13-2004, 09:16 PM

johnnyboatman

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jryan
i thought a 540 needed a bigger cfm carb?
i have roller 502 w/ demons running 84/95

05-14-2004, 05:36 PM

HARRISONMIRAGE

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Modified zz 502,800 CFM 9022 carb.86 pr 96 sec 6.5 PV.A bit rich at idle but still working it back.No transom soot and plugs clean after a hard run.I am having a problem getting the plugs to color,but they dont look overheated.I was richer but noted speed improvment backing down to here.It still seems a bit rich by comparrison of what other people are running.I might experiment some more but I'm gettin tired of stinkin like gas and oil everytime I go boating.