Idle Mixture Setting
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Member
Joined: Jan 2005
Posts: 391
Likes: 0
From: Grand Rapids, Mi
Car: 1991 Z28
Engine: 357
Transmission: T-56 waiting to go in!
Axle/Gears: 3.73:1
Idle Mixture Setting
Could someone please give me thr proper procedure for setting the idle mixture screws on a Demon using a vacuum guage?
Joined: Mar 2000
Posts: 43,187
Likes: 42
From: Littleton, CO USA
Car: 82 Berlinetta/57 Bel Air
Engine: L92/LQ4 (both w/4" stroke)
Transmission: 4L80E/4L80E
Axle/Gears: 12B-3.73/9"-3.89
http://www.barrygrant.com/fromBarryG...n%20Manual.pdf for the Speed Demon. Pages 6 & 7. If you don't have a Speed Demon, get the appropriate one from http://www.barrygrant.com/pages/manu...e=distributors .
I found that by typing in www.barrygrant.com and clicking around a little. Not too difficult, really.
I found that by typing in www.barrygrant.com and clicking around a little. Not too difficult, really.
Junior Member
Joined: Apr 2004
Posts: 52
Likes: 1
From: Oswego, IL
Car: 87 Pontiac Firebird Formula
Engine: 355 SBC-Thats all I can say or they will break my legs.
Transmission: 5 Speed
just turn the idles screws in a bit, then begin backing them out until the highest vacuum reading is obtained. You should do this at idle and check using manifold vacuum. after you turn one screw 1/4 turn, turn the other one the same amount.
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