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Wer bremst verliert
Join Date: Jan 2005
Location: Toronto, Ontario
Posts: 4,767
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AAV valve necessary for track-only EFI engine?
This question is somewhere the race/autoX and engine building forums so maybe here is better than a cross-post...
I'm just finishing up my first 911 engine build for a track-only car. Megasquirt is handling fuel... Is an auxillary air valve necessary for an engine that will get started with an attentive mechanic and driver on-hand and an EFI system with "warm-up" fuel compensation maps working its injection? I could set the warm-up cycle on the megasquirt EFI to run rich under 190 degrees and keep the throttle partly open under cranking... I'm striving to ditch every bit of unnecessary gear and complication so would like to hear if this works for people... thanks
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2007 911 Turbo - Not a toy 1985 911 Cab - Wife's toy 1982 911 3.2 Indiash Rot Track Supercharged track toy 1978 911 3.0 Lichtbau toy "Gretchen" 1971 911 Targa S backroad toy |
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08-16-2006, 05:41 AM
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I would rather be driving
Join Date: Apr 2000
Location: Austin, TX
Posts: 9,108
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Get rid of it and use an early hand throttle. The AAV will give you the bypass air for the cold start.
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Jamie - I can explain it to you. But I can not understand it for you. 71 911T SWT - Sun and Fun Mobile 72 911T project car. "Minne" - A tangy version of tangerine #projectminne classicautowerks.com - EFI conversion parts and suspension setups. IG Classicautowerks |
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08-16-2006, 05:45 AM
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Registered
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I have the AAV on my EFI system, however in the process of doing some testing early on I had it eliminated. It's summer in Colorado so my AAV by default is almost entirely closed as it is, that being said I was able to change the cold enrichment values and it worked fine.
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2021 Model Y 2005 Cayenne Turbo 2012 Panamera 4S 1980 911 SC 1999 996 Cab |
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08-16-2006, 07:23 AM
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1985.5 Porsche 944 2.5L Supercharged 
911 SC
Panamera
