[DeTomaso] Optimal Air Fuel Ratio Question

Mad Dog Antenucci teampantera at yahoo.com
Wed Jun 3 19:43:51 EDT 2009


Denver is closer to 5,000 feet unless you are flying over it. ;-]>

But then Jack reports Junior has run 240 Mph at Silver State too. ;-]>
Reality: he ran 206 mph trap speed on radar @ a 177 Mph Average)

 
Mad Dawg Antenucci 
Team Pantera Racing 
The 1st & still the only vintage race team in open road racing 
www.teampanteraracing.com




________________________________
From: David in Durango <adin at frontier.net>
To: JDeRyke at aol.com; scottcouchman at yahoo.com; detomaso at realbig.com
Sent: Wednesday, June 3, 2009 4:29:47 PM
Subject: Re: [DeTomaso] Optimal Air Fuel Ratio Question

Denver isn't quite 10,000 ft, otherwise we should listen to uncle Jack - all 
principles apply.


----- Original Message ----- 
From: <JDeRyke at aol.com>
To: <scottcouchman at yahoo.com>; <detomaso at realbig.com>
Sent: Wednesday, June 03, 2009 12:23 AM
Subject: Re: [DeTomaso] Optimal Air Fuel Ratio Question


> Additional thought: be very careful setting a carb up too close to the
> stoichiometric ideal of 14.7:1. If you do this in L.A at 0 ft of altitude 
> and
> drive to Reno at 5000 ft, you'll be quite rich and will lose maybe 20% of 
> the
> engine's power due to lack of oxygen. So you rejet again, drive to Denver 
> at
> 10,000 ft and you're again way-overrich and even further down on power.
> Rejet once again and drive back to LA, where you burn a valve 'cause 
> you're now
> dangerously lean. Carbs outa-the-box are set rich 'cause they have no idea
> where you live or where you're gonna go, and warranty returns depress
> everyone.
> One wonderful thing about EFI is their automatic barometric fuel/air
> adjustment. Wish it had come along while carbs were being made.... J 
> Deryke
>
>
>
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