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Banned
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Location: Portugal
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Retrofitting an idle stabilizer
My 74 911S has a CIS with the "hand" accelerator, which is not the most practical thing... Is there a way to retrofit an idle stabilizer (or auxiliary air valve) as found in later CIS equipped cars ?
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07-04-2009, 10:43 AM
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Turbonut
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Yes there is. CIS that uses AAV operates it with heat generated by engine and current that heats the bimetallic strip and depends on thermo-time switch (that operates cold start injector and WUR itself also).
You could use it only to operate with engine heat (open when cold and gradually close when engine warms up) if you don't feel comfortable messing with wiring.
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'83 924 (2.6 16v Turbo, 530hp),'67 911 hot-rod /2.4S, '78 924 Carrera GT project (2.0 turbo 340 hp), '84 928 S 4.7 Euro (VEMS PnP, 332 HP), '90 944 S2 Cabriolet http://www.facebook.com/vemsporsche |
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07-04-2009, 11:44 AM
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Banned
Join Date: Apr 2004
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But does the valve fits somewhere, or does the fuel distributor or throttle body needs to be replaced ?
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07-04-2009, 12:26 PM
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Registered
Join Date: Mar 2001
Location: Marysville Wa.
Posts: 22,431
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you just have to figure out how to plumb it to allow it to let air in below throttle. wiring is easy. a ground and power with the key on.
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07-04-2009, 01:35 PM
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Registered
Join Date: Apr 2008
Location: Miami
Posts: 961
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Are you sure you want to do this? A lot of people want to get rid of their auxiliary air system. Do a search on Auxiliary Air Valve (AAV) and Auxiliary air regulator (AAR). The one you want is the regulator.
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1979 SC, Slant nose wide-body cab conversion. AEM Infinity EFI, COP, supercharged! Last edited by Dr J; 07-04-2009 at 05:51 PM.. |
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07-04-2009, 05:48 PM
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Registered
Join Date: Dec 1999
Location: Novato, CA
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The easiest way is to retrofit a complete 76 CIS injection system with the late style airbox that has the internal plumbing for the cold start mixture. That's how I did mine and never had an airbox explosion.
Joe Last edited by stlrj; 07-04-2009 at 10:00 PM.. |
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07-04-2009, 09:54 PM
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Banned
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Quote:
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07-12-2009, 01:57 AM
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Banned
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hum... if the valve has to operate with engine heat then it should be fixed to the engine somehow, a bracket won't do probably, right ?
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07-12-2009, 05:39 AM
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Registered
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I did this on a 73 cis. Totally easy. Used the IAC off a junkyard CIS VW Rabbit. Plumbed into one of the idle hoses with a Tee. Just zip tie it in there and run 12v to it. Even without direct contact with the engine case It works fine. Makes car way better.
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1972 Porsche 914 Project 2000 BMW M5 1973 Aermacchi 350 |
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07-12-2009, 10:05 AM
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Banned
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Good, I was worried if it would work without contact to the engine.
So, afterwards you didn't had to use the hand throttle anymore ? |
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07-12-2009, 01:14 PM
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1981 Porsche 924 "Turbo" [SOLD]
1983 Porsche 924 2.5 16V Turbo
"Gulf"
1995 Audi A8 4.2 Quattro
1967 Porsche 911 hot rod
1970 Porsche 911 t 2.2 
