Carb Tuning

General engine tech -- Drag Racing to Circle Track

Moderator: Team

Post Reply
F-BIRD'88
Guru
Guru
Posts: 6297
Joined: Tue Mar 27, 2007 6:56 pm
Location: Ontario, Canada

Re: Carb Tuning

Post by F-BIRD'88 » Sun Oct 07, 2018 9:22 pm

So when you are driving along steady speed, at cruise at a speed high enough to be on the pri main jets, what is the AFR?

BobbyB
Member
Member
Posts: 131
Joined: Mon Apr 15, 2013 1:35 pm

Re: Carb Tuning

Post by BobbyB » Mon Oct 08, 2018 6:41 am

14.5 to 15.5

BobbyB
Member
Member
Posts: 131
Joined: Mon Apr 15, 2013 1:35 pm

Re: Carb Tuning

Post by BobbyB » Mon Oct 08, 2018 7:39 am

Tuner, do you remember how much vacuum you had at idle with your 289?

F-BIRD'88
Guru
Guru
Posts: 6297
Joined: Tue Mar 27, 2007 6:56 pm
Location: Ontario, Canada

Re: Carb Tuning

Post by F-BIRD'88 » Mon Oct 08, 2018 2:02 pm

Tuner can show you a few good tricks and mods to make the 3310 into a even better carb.

BobbyB
Member
Member
Posts: 131
Joined: Mon Apr 15, 2013 1:35 pm

Re: Carb Tuning

Post by BobbyB » Tue Oct 09, 2018 8:01 pm

I put a 4.5 power valve in the 750 carb and tried to test it but could not get it to idle at all. I think the front needle seat is leaking. (Today was the first time the carb ever had fuel in it since I bought it new in 1988ish.)
So, I upped the front main jets in the 650 quick fuel from 66 to 67 & went for a spin. Car drove great with afr at cruise from about 14.3 to 15.3 in the 25 miles I drove today. Did not try wot today.
Not sure when I might be able to get back on the 750.
Thanks for all the input you guys gave me.

Post Reply