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Thread: Carburetor settings?
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09-07-2008 #1
Starting The Transformation
- Join Date
- Jan 2008
- Location
- Felton, DE
- Posts
- 346
To set idle mixture get a vacuum gauge and turn each screw in or out equally until you get max vacuum. This is the BEST way to do it. I had set mine this way before i got my wideband, hooked my wideband up and it was idling at 14.8.
1994 Z28 - 13.52@110mph 2.1 60ft T56, bolt-ons, suspension
1978 Datsun 2+2 - 6.0L LS1 swap in progress
1968 Firebird, 2820 dry- 2000 LS1, D&D Viper T56, RAM clutch/flywheel, 236/236 .651/.651 110+4LSA cam, victor JR EFI, 4150 TB, 42lbers, painless harness, Moroso 7qt pan, sfc, trac bars, 3" x pipe side exits, Telstars-30"MT streets/skinnies, mini-tub, 8.5" posi, richmond 4.56s, Hooker lLTs, Denny N20 DS, Fast dual wideband, Shotgun street scoop.
http://www.myspace.com/shawnmacananny
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09-07-2008 #2
Registered User
- Join Date
- Aug 2008
- Posts
- 67
My 383 is close to yours but a bit more cam
It likes 16 in 34 total at 3000,so I think your is fine.
The vac advance will help you run a leaner idle.
A good tach and vacuum gauge are great to set idle.I keep the rpm constant(say 750 or so) and as I'm moving the idle metering screws I keep the speed the same with the throttle screw while looking for the highest vac reading-at that point I turn each idle mixture screw 1/16-1/8 turn rich to aid drivability.
You will have to be carefull on the vacuum advance with your comp and iron heads,Iwould guess no more than 10-12 dedrees is all your motor would take
for a total of 46-48.
Nice lookin nova by the way.
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