View Full Version : 750 Carb Jetting for Big Block
Philip47
01-06-2002, 04:08 PM
420hp 454cu 750 Holley DP mech secondaries, starting with 71 primary jets, 82 secondary jets,
Too lean or? whats you suggestion of a starting place?
BigGrizzly
01-06-2002, 08:18 PM
On my sock motoe I'm rinning 75primary NS 82 secondaries.
Randy
Philip47
01-07-2002, 05:14 PM
Okay, I just went outside and bumped the primaries to 73's I shouldn't be too lean,
Jamesbon
01-07-2002, 07:28 PM
You may want to contact Nickerson Performance, they specialize in marine carbs. 215 781 1370. Good Luck!
Nate
BigGrizzly
01-07-2002, 10:59 PM
I got a Idea, just call Holley and ask them. Most people over jet anyway. Thre tech guys know this combo. there is a book of applications for merc. Loaned minr out about 9 years ago and havn' seen it since.
Randy
Philip47
01-09-2002, 06:05 PM
after looking up by list# what Holley jets Marine carbs I didn't call them, they were running like 94's in the secondaries.
Went out today and tested and wound up with 73 primary and 84 secondary, clean crisp and strong
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