[DeTomaso] Optimal Air Fuel Ratio Question

[John Taphorn]

Scott

I'd target the 13s.  Try leaning the primaries 8 jet sizes and richen the 
secondaries about 4 jet sizes.  Four jet sizes will change your ratio by 
about one.  I assume that you have a power valve on the primary side and 
none on the secondary.

JT
----- Original Message ----- 
From: <scottcouchman at yahoo.com>
To: "Pantera Forum" <detomaso at realbig.com>
Sent: Tuesday, June 02, 2009 9:03 PM
Subject: [DeTomaso] Optimal Air Fuel Ratio Question


> I'm starting to set up the Holley 750 DP mechanical secondaries on my mild 
> 351 Cleveland.
> I have the Innovate meter with a wide band O2 sensor in the header 
> collector.
> I know I'm fat at partial throttle (high 10s to low 11s), and lean a WOT 
> (14 to 15)
> I saw a Super Snake dyno sheet recently that showed a flat A/F of 11 from
> about 2500 to 7000 rpm.
> That surprised me.
> I think I S/B a little leaner at partial throttle and richer at WOT
> I know you can run rich all day and lean only once.
> Anyone have an opinion as to what A/F I should shoot for under different 
> conditions?
>
>
>
>
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