| Re: [GMCnet] 16.5 to 1 lean burn cruise isn't a problem with the Howell/GM system. [message #324206 is a reply to message #324205] |
Fri, 22 September 2017 12:41   |
Keith V
Messages: 2337
Registered: March 2008
Location: Mounds View,MN
Karma:
|
Senior Member |
|
|
The other variable is the E10 gas we run now.
What does that do to EGT and AFR?
I did try rejetting my carb up one step and it made a huge difference, it went to around 14:1
Maybe I should see what that does to my MPG...
________________________________
From: Gmclist on behalf of Justin Brady
Sent: Friday, September 22, 2017 12:33:50 PM
To: gmclist@list.gmcnet.org
Subject: Re: [GMCnet] 16.5 to 1 lean burn cruise isn't a problem with the Howell/GM system.
Kosier wrote on Fri, 22 September 2017 11:00
> Dick Balsley, who spent his whole career with GM, said that Gm calibrated
> carbs for a 16.2 ratio. They liked 16.5, but production tolerances
> kept them at 16.2. The Q-Jet on my Cadillac engine has been running at that
> figure for 10+ years. Call it "dumb luck" if you want>
>
> Gary Kosier
> 77PB w/500Cad
> Newark, Ohio
>
> --------------------------------------------------
> From: "Bob Dunahugh"
> Sent: Thursday, September 21, 2017 10:37 PM
> To:
> Subject: [GMCnet] 16.5 to 1 lean burn cruise isn't a problem with the
> Howell/GM system.
>
>> Randy Van Winkle is extremely knowledgeable on that topic. And has data
>> that shows it's fine with our 403, and 455. You have to remember that this
>> system controls the ignition timing. Bob Dunahugh
>> _______________________________________________
>> GMCnet mailing list
>> Unsubscribe or Change List Options:
>> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
>
>
> _______________________________________________
> GMCnet mailing list
> Unsubscribe or Change List Options:
> http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Do you have an afr gauge installed? I've never seen a carb run that lean Intentionally even at cruise.
--
Justin Brady
http://www.thegmcrv.com/
1976 Palm Beach 455
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
_______________________________________________
GMCnet mailing list
Unsubscribe or Change List Options:
http://list.gmcnet.org/mailman/listinfo/gmclist_list.gmcnet.org
Keith Vasilakes
Mounds View. MN
75 ex Royale GMC
ask me about MicroLevel
Cell, 763-732-3419
My427v8@hotmail.com
|
|
|
|
GMCforum
Search
Help
Register
Login
Home
