SO how much would a tune plus some upgrades if necessary help the gas mileage? anyone have results on here?

 

PCM4less has been doing GM motors, particularly their v8's, for years now. They are the way to go. Generally they add more power, and with more power SHOULD come a lighter foot, and with a lighter foot SHOULD come better mileage.

Though, it tends to operate the opposite; most people like the added power, and give it more throttle because it's more fun.

 

I have run some different tunes in several of my H2's over the years. So far if you are looking for an off the shelf programmer the Diablo sport has given me the best power & mileage in a hand held.. J

 

wat kind of mileage u getting?

 

Before I reflashed it in my shop I was getting around 10.5-11.5 when not on the highway/interstate driving the local back roads & city stuff.. On the highway for longer trips before it was around 15..

After I reflashed it in my shop the local/city non highway stuff is now around 12-13 and the highway I can get around 16-17..

Obviously if I tow something or put my foot into it it will loose about 3-4mpg on each of them.. Jamie

 

wow 16-17highway with just a tuner? Thats awesome!

 

Tune, aftermarket air filter, and keeping my foot out of the gas while using cruise control.. Otherwise the numbers aren't as good as I mentioned before..

Actually all of the h2's that I have had were what I consider to be decent on fuel. I would say they were all comparable to my pick ups or other Gm fullsize vehicles with V8's.. J

 

Interesting. Thats prolly the best mileage i've ever heard of out of an H2. Thats awesome.

 

lakeside
on the tunner , i have never tryed this ,how hard is it to use and does the unit came with differnt preset programs to try , or do you have to make it up , i would hate to mess up the factory program .
can you give us some more info and what you are using , i dont want to spend 300.00 for a programer if its a pain to use .mike

 

The Diablo had 2 or 3 preset tunes. I use the one with the most perf. I didnt find it to bad to use at all. Just followed the directions. There are other ones that allow you to do your own cals but you really need to know what you are doing. I have dealt with both types and it depends on what you want.

If you want the simplest and you want to do it yourself, the diablo is one of the easiest we have done and it has gotten the best results for us out of a pre packaged cal from a hand held unit.. Jamie