390 Jetting?!?!
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From: Spokane WA
390 Jetting?!?!
What's the best size jets (prim and secondary) for me to run? I have a 390 built to stock factory 74 specs, an Edelbrock 650 cfm, headers to 2.5" pipe. I really want to dial it in if I can, so I thought I'd ask the experts here before I order them. I dont know much about jet sizing so I could use some help here please. THANKS!!!!
Scott
Scott
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From: Spokane WA
I'll try lookin up those references at work tomarrow, but I doubt any of the books would cross those over. I've never touched jets before (well, in snowmobiles I guess) Do they change over, like holleys fitting in edelbrock carbs?
Postmaster
Joined: Jun 2003
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From: WA
they are different.
Is your carb still stock setup then? Is it a 1406? The stock setup should be pretty close to where you want to be, maybe a tad lean. I run my cruise circuit one stage richer than stock, the 2ndaries are still stock I think. I have the eddie rod/jet kit, plus a few extras that I can rent out...
Is your carb still stock setup then? Is it a 1406? The stock setup should be pretty close to where you want to be, maybe a tad lean. I run my cruise circuit one stage richer than stock, the 2ndaries are still stock I think. I have the eddie rod/jet kit, plus a few extras that I can rent out...
Lead Driver
Joined: Sep 2003
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From: Albuquerque
Here is an idea for a cross reference.
Go to jegs.com or summitracing.com and look up the holley jet sizes. Write down the "actual" size and then go look up the Edelbrock jet sizes. Of course keeping in mind, that the Edelbrock also uses the metering rods...which effects the circuit.
Might work...
biz
Go to jegs.com or summitracing.com and look up the holley jet sizes. Write down the "actual" size and then go look up the Edelbrock jet sizes. Of course keeping in mind, that the Edelbrock also uses the metering rods...which effects the circuit.
Might work...
biz
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Joined: Jun 2003
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From: WA
Originally Posted by ford390gashog
the edlbrock uses metering rods which are 40.00 a set. the holley jets are about 12.00 for a set.
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Postmaster
Joined: Mar 2003
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From: Spokane WA
Originally Posted by beeboy
$40 buys you the kit which has about 5 sets of rods and jets for the edelbrock. Individual rod sets are about $10.
Jets are only like $2.99 from summit
Whole kit is $49 I think...
Scooter, I have a book that tells you what rod jet combo to go with to accomplish what you want for each model carb, email me or messenger me and tell me what you wanna do and we'll chat. If Jim doesnt have time or isnt available I can help you do Jets and Rods too, it will take us about 10 minutes, its pretty easy....
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