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Underbody braces, turbos and more!

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PostPosted: Mon Dec 05, 2005 7:41 pm 
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I know this has the potential to turn into a massive debate and there is a lot of dogma associated with it, but I just want to see what everyone thinks.

http://fueleconomytips.com/content/view/59/30/

Could the observed gains in MPG be because of the vacuum leak being put in the system, maybe causing the engine to run lean because of unmetered air?
Barring that possibility, it seems the results really would be telling the tale in this case.
I have not tried this yet, but I intend to and will post the results after I have.

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PostPosted: Mon Dec 05, 2005 8:08 pm 
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Quote:
You are not authorized to view this resource.
You need to login.

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 Post subject: I'm trying it too
PostPosted: Mon Dec 05, 2005 9:33 pm 
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I have the ozone thing hooked up on my XFI and haven't noticed any big gains, but I haven't run through a full tank of fuel since doing it. I'm guessing if there's a gain it will be like 1 MPG. Of course, the weather really turned cold since I installed the ozone mod, which could skew my results.

Jeremiah

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PostPosted: Tue Dec 06, 2005 1:41 am 
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oh yeah you have to login to see that page... it's free though.
maybe Iburnh2o will let me post all of it on here later.
I dunno.

But the basic gist of it is that you take a perfectly good distributor cap and drill a couple of holes in it and you plug a vacuum line into one to suck ozone from it into your engine where the ozone (o3) reacts with the fuel easier than o2 and helps it burn more completely. (Kind of like nitrous I think?)

the question is: is it just a vacuum leak leaning out the mixture because it's an unmetered air intake, or could the gains from doing this actually come from the ozone?

I'm contemplating just leaving a vacuum hose openended like that and comparing that to hooking it up to the dizzy.

Sorry about the link, I spaced it on that one.

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PostPosted: Tue Dec 06, 2005 5:17 am 
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A car with a MAF sensor or carburetor will run leaner with a vacuum leak. A car with a MAP sensor will just idle higher.

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PostPosted: Tue Dec 06, 2005 7:47 am 
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If you want ozone, why not put an ozone generator inside the air duct? Here's a circuit for a volt multiplier that can run on 12 VDC (it has a warning about it's ozone output):
http://www.uoguelph.ca/~antoon/circ/hv/hvdcgen/hvdcgen.html

Here's a full page detailing the construction of a few different types of ozone generators:
http://www.emanator.demon.co.uk/bigclive/ozone.htm

It may be even easier just to go use a second ignition coil and run the leads out to the intake duct which would have a large glass tube, with metal mesh on both sides. One wire to each piece of mesh. This might need a higher voltage to work though.

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PostPosted: Tue Dec 06, 2005 12:11 pm 
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So far we've gathered that:

It IS possible that on a carbureted engine (or with a MAF) it would explain the better mileage, but not the increase in torque and throttle response, because it's running lean.

With TBI (MAP sensor), a vacuum leak would not have any effects resulting in what is ascribed to the ozone:
1. Better mileage
2. Torque
3. Cold startability
4. Throttle response

Interesting.

Now the next question is: Where to plug the line into? The article says anywhere that sees vacuum is fine, but where would be best on our cars?
I don't want anything corroded because of exposure to ozone. I hear it's pretty bad on rubber...
Oh well, I guess we'll see. :roll:

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Last edited by STuPiDiCuS on Wed Dec 07, 2005 11:10 am, edited 1 time in total.

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PostPosted: Tue Dec 06, 2005 1:52 pm 
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we could see if it was leaning the mixture out or not just by using an air to fuel ratio/wideband o2 sensor couldn't we?

or would the ozone throw that off?

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PostPosted: Thu Dec 08, 2005 11:32 am 
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Lihtan, I've considered that, but I thought they drew more than they put out.

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