Well you can have great mileage and have plenty of hp to go along with it. Maxthe7man gets 28-30 mpg with his single turbo T2 and I'm guessing he has somewhere near 400rwhp. Amazing what you can do with a haltech and a wide band o2 meter.

 

Mine is a single turbo TII (engine). With the smaller turbo (stock) you'll use more fuel after some mods than you would with a larger turbo upgrade. Once the boost comes on your fuel goes alot quicker.

Mine has been tuned a month ago by Rice Racing, and actually got better... It used to be worse than it is now. I must admit that I might be getting slightly better than I first thought. I've been driving the car all week and I'd actually guess that when driving normally, I'd be closer to 300kms per tank in the city.

I would partially blame my old Microtech Digi 1 computer though. A newer Microtech or a Haltech would probably improve it heaps.

 

Does he have a wideband in the car?

 

I'm not sure if he has it in the car all the time but if I had one I would .... well unless I was borowing it to others for a small fee

I don't think he is tuning with the WB when he is getting that 28-30mpg though. The narrow band I would think would be a better tuning aid when shooting for ~ 14.7 AFR to get that ultra high MPG.

 

You get better mileage running lean than stoich, as long as you're not running into lean misfire. Not so good for emissions, though.

 

I get 17mpg for my 4 speed.. kinda surprising really since I have the street port, but most of my miles are highway miles.

matt

 

True, you get better mileage the leaner you run it. Too bad we can't figure out a way to run 50:1. Max said he runs 14.7:1 -15:1 when in closed loop and his target for the o2 is 450mv. If I remember right stoich on most narrow bands is 500mv so I guess he's running it a little on the "lean" side.