Speed Demon 850 ve
Thread Starter
Junior Member
Joined: Mar 2010
Posts: 14
Likes: 0
From: Arlington, Tx
Car: 87 GTA
Engine: L98
Transmission: TH350
Axle/Gears: 3:42
Speed Demon 850 ve
I got this carb, 850ve speed demom, in my garage just sitting and was wondering if there is a way to jet it down for my L98, .477in .490ex cam (96 LT1 cam with 1.6 roller rockers), longtube headers no cats, rpm intake, msd street fire dis , th350 with 3:42 gears. Will I be able to use it or not? First time posting so if this has been discussed point me in the right direction. Any input will be appreciated. Thanks.
Joined: Mar 2000
Posts: 43,187
Likes: 45
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
Welcome aboard thirdgen.org.
You can probably jet it to run decently. You may have issues at low engine speeds getting the transition from idle to mains to behave, but other than that, it'll "run". The biggest issue will probably be having enough converter stall to get the engine speed up adequately when going full throttle.
You can probably jet it to run decently. You may have issues at low engine speeds getting the transition from idle to mains to behave, but other than that, it'll "run". The biggest issue will probably be having enough converter stall to get the engine speed up adequately when going full throttle.
Thread Starter
Junior Member
Joined: Mar 2010
Posts: 14
Likes: 0
From: Arlington, Tx
Car: 87 GTA
Engine: L98
Transmission: TH350
Axle/Gears: 3:42
Re: Speed Demon 850 ve
Thanks for the info. Picked up a 600cfm edelbrock cheap I will be going with that for now. Thanks.
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