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Old 06-17-2008, 06:50 PM   #41
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Roadking41a your car should already have some form of WAI.

A thermal element in the air cleaner snorkel that draws heat off the manifold.

You could make it work constantly to see if there is a benefit, normally it would only work below a certain temperature.

You can usually tell when its working, the air cleaner housing will be hot to the touch.


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gary
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Old 06-17-2008, 07:17 PM   #42
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Quote:
Originally Posted by R.I.D.E. View Post
Roadking41a your car should already have some form of WAI.

A thermal element in the air cleaner snorkel that draws heat off the manifold.

You could make it work constantly to see if there is a benefit, normally it would only work below a certain temperature.

You can usually tell when its working, the air cleaner housing will be hot to the touch.


regards
gary
Right now it's off since I don't6 have the factory carb on it. I plan to go to Pull A Part and get a proper carb and needed parts to put it all back
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Old 06-17-2008, 07:23 PM   #43
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Do you need to replace the carb?

Maybe you could adapt a stock air cleaner housing to the existing carb?

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gary
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Old 06-17-2008, 07:29 PM   #44
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Quote:
Originally Posted by R.I.D.E. View Post
Do you need to replace the carb?

Maybe you could adapt a stock air cleaner housing to the existing carb?

regards
gary
Yeah I had to put a Edelbrock 600 CFM and lost 1/2 my gas mileage.So I'm going to get another factory carb to bring it up again then work on improving on that.
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Old 06-18-2008, 05:54 AM   #45
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Quote:
Originally Posted by R.I.D.E. View Post
Roadking41a your car should already have some form of WAI.

A thermal element in the air cleaner snorkel that draws heat off the manifold.
Speaking of OEM WAI...I found out yesterday that lots of modern vehicles have it. Read any of the results for this search:
http://www.google.com/search?q=throttle+body+bypass
They tell you how to remove it for more power. It's a coolant line that carries hot coolant to the throttle body, and is there supposedly to prevent humidity from condensing and freezing in the throttle body at low temperatures.

How do they compare to a DIY WAI? I'd guess that they don't heat the air as much as we're looking for when we do a DIY WAI.
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Old 06-18-2008, 06:02 AM   #46
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Typically referred to as a TBB or Throttle Body Bypass... HUGE mod for the F-Body crowd (Camaro/Firebird) equipped with LT1 and LS1 engines. I'm not sure, but the TPI throttle body may have had a coolant line passing through it as well.
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Old 06-18-2008, 06:13 AM   #47
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My 37 Ford had an exhaust passageway from both banks that intersected right under the carburetor.

In the Datsun 240Z you could get carb icing at 50 degrees. We actually used the Winter-Summer selector on the air cleaner to fine tune our carburetor adjustments.

Ran good with it on ran like crap with it off. Fine tune it for personal preference after that.

Another mod on early FI (75-78) the old Z cars was to adjust the flap AFM very lean, then install a potentiometer in the water temp circuit so the mixture was adjustable from the dashboard.

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Old 06-18-2008, 08:37 AM   #48
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So, is a WAI pointless on vehicles that have the heated throttle body?
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Old 06-18-2008, 09:26 AM   #49
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I think the level of heat we are talking about is different. only so much heat is going to radiate out of that hose. the exhaust manifold gets really hot and a lot of that is lost in transit to the intake but I am glad it does because I don't want the temps to go nuts on me.

I have heard that if your vehicles computer takes into consideration the temp difference then the WAI will make a difference and if it doesn't then you just lose power because of less oxygen. obviously my car does this because my mileage has gotten better and it has over a long period of time as well.
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Old 06-18-2008, 11:28 AM   #50
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I wouldn't conclude it was pointless until I had gerry rigged something long enough to see if it still helps.

A lot of chilling can happen around the throttle butterfly. Adding some temp to incoming air should always improve MPG, even if you have to lean out a carb and delay the choke release some.

Also experiment with timing if you notice an improvement with WAI. You might actually be able to advance it somewhat without spark knock.

For older cars that you can actually do things like this.

Knwoing what I know now I'll bet I could get 40 MPG in my 63 Valient I owned 40 years ago that got 28.5 highway at 65-70 MPH.

regards
gary

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