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Old 10-29-2009, 02:12 PM   #11
03OrangeSVT
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Sure you can go in and change the AFR to anything you want, BUT the leaner it goes the hotter the exhaust gases are and the more prone the engine becomes to detonation or just flat out melting a piston or burning a valve.
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Old 10-30-2009, 01:34 AM   #12
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I'm also hypermiling, and I've been getting 55-56mpg consistently during the summer months, and I'm now getting 51-53mpg as the weather is getting cooler (40-45 deg in the morning). My scangauge required only about 2% adjustment for the calibration. I haven't done anything to the car for aero, but I am planning to block off the upper and lower grille openings for the winter. Should help the car heat up faster, and also improve drag somewhat. Other than that, I am running about 43psi in the tires. Slightly bumpy ride, but it glides nice!
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Old 10-30-2009, 10:50 AM   #13
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Quote:
Originally Posted by 03OrangeSVT View Post
Sure you can go in and change the AFR to anything you want, BUT the leaner it goes the hotter the exhaust gases are and the more prone the engine becomes to detonation or just flat out melting a piston or burning a valve.
So you CAN change it with all those tuning programs though? The Closed loop AFR?

I am not worried about overheating, I just ordered a Water injection kit (I was going to need it since I am going high compression on 87 grade gas) so that will take care of all my cooling needs (plus I will be able to advance the timing much more).
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Old 10-30-2009, 10:54 AM   #14
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I'm also hypermiling, and I've been getting 55-56mpg consistently during the summer months, and I'm now getting 51-53mpg as the weather is getting cooler (40-45 deg in the morning). My scangauge required only about 2% adjustment for the calibration. I haven't done anything to the car for aero, but I am planning to block off the upper and lower grille openings for the winter. Should help the car heat up faster, and also improve drag somewhat. Other than that, I am running about 43psi in the tires. Slightly bumpy ride, but it glides nice!
An wow thats fantastic!

I just hooked up the scangauge yesterday, and set the engine size to 2.0L. I was sure that it was so wrong because just going around town I was getting 36mpg consistently (and I mean around town, stop and start and more stop and a little start then stop again... lol)! BUT my correction is at 10%! (its always been kinda high for all my other cars).

Of course I wount know 100% what it is untill i fill up the car but if its anywhere close to 2% that would mean im not getting 36mpg but way more! And all this is even BEFORE starting to mod the car! (and yes I run at 42psi).
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Old 10-30-2009, 11:02 AM   #15
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So you CAN change it with all those tuning programs though? The Closed loop AFR?

I am not worried about overheating, I just ordered a Water injection kit (I was going to need it since I am going high compression on 87 grade gas) so that will take care of all my cooling needs (plus I will be able to advance the timing much more).
Your not going to be able to do high compression on 87 let alone being able to advance the timing , WMI isnt going to help you do do it safely , please look into this more before heading this rought

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Old 10-30-2009, 11:06 AM   #16
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Do you speak from personal experience or just what you have heard?
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Old 10-30-2009, 11:55 AM   #17
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Persional experience with tuning cars and dynoing sence 1996 and have played a lot with WMI on many cars with diff combinations

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Old 10-30-2009, 12:04 PM   #18
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Well by high compression I mean 10.5 or 10.7. Still think it's too high? Remember I'm doing this stricly for mpg not for power.
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Old 10-30-2009, 12:43 PM   #19
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Yes for 87 octane that is to high , you will end up pulling a ton of timing , those are 93 to 95 octane compressions , Higher compression on an inefficient engine wont do you a lot of good , do things to make what you have more efficient , SVT header , exh , small cams and adj cam gears , tune , all of there will add more low end tq and make normal driving more efficient , then add your WMI if you like

Why dont you just make a hydrogen gen , simple , easy and they work great and waters cheap , I am running one now

Tom
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Old 10-30-2009, 09:05 PM   #20
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i did my senior project on one of those in highschool search up an hydrogen booster and electrolosys process for ideas and browns gass those key words will give good results


1) They improve gas mileage.
2) They clean carbon deposits out of your engine.
3) The added hydrogen/oxygen produced acts like a
catalysis to your fuel, a more complete burn and slightly cooler.
4) Add a FREE 120 octane booster to your air/fuel mix.
5) Knocks down the hydrocarbon count from your exhaust
leaving a much cleaner emission.
6) Increases horsepower
7) Will NOT damage your engine, all your doing is adding more combustion al air to the air intake.
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