By all accounts, MTH does a great job of creating a file that gains power maybe at the expense of gas mileage. Can they also create a fuel efficient, low performance file?

It may just be my imagination, but it seems like my supercharger starts boosting much quicker and at lower RPM's with the MTH file installed. In the winter, I don't much care about performance. Could I have a file created that shuts off the supercharger? Can MTH control the blow-off system in the car to give the efficiency of a non-S Cooper?

 

Here is a idea. You could load the .org file back into the car during the winter. But I like your idea too. sorry I had to put my 2 cents in.

 

One of the members of Metroplexmini.org has what he calls a "lean map" from Franz.

He was telling me that he loaded it the other week when gas prices went up, but ended up taking it off for two reasons:

1. He was only saving about 1 mpg. That being said, he will readily admit that he can't "keep his foot out of it" and regularly gets in the mid teens for MPG.

2. His MCS turned, I think his exact words were, "Pig Slow". THAT being said, he usually runs the tuner map from MTH and loves it.

If it mattters, this particular gentleman is a MTH rep.

-- Jay

 

I know I could put the .org file back, but was wondering if I could do even better with some MTH magic.

 

That's exactly what my friend has. He has several MTH maps. One that's lean (ie. better gas mileage), the standard file, and the tuner file. That's three different files (at least) that he has.

-- Jay

 

You could always do one that limits your RPM to 4k and max speed to 65mph...

 

The best solution would be one that remaps the thottle to say, 50% actual at 100% pedal.

 

I was thinking one that limits the supercharger boost.

 

Yes it does, which is the best thing for mpg.

 

You mean, make the car like a MINI One? Thats clever.

 

I think that would make my head explode

 

Exactly!

 

It really is just your imagination. The supercharger is not controlled by the ECU so the MTH did not make your supercharger start boosting sooner. The only thing I can think of (besides trading it in for a Cooper ) would be to make a reverse VGS or ryephile fix. Those help the supercharger bypass close sooner or tighter. If a reverse "fix" could be made, you may be able to keep the bypass open longer.

 

Or just duct tape a block under your throttle to limit it a bit.


Or do what I do...for free...have self-control of the throttle. It made a 9mpg city difference with me.

 

It is not really feasible to create a special fuel saving file, as standard and tuner file are better on fuel consumption already (normally driven). But this depends totally on the individual car. It is also not advisable to lean out the car too much just to save a few bucks. That could cost you your engine when you get bad fuel quality. In my personal opinion, 8,6 l/100 km is not bad for a car with 204 BHP (my S with tuner file). A friend of mine is driving a ONE with tuner file and can hardly manage to go under 10 l/100 km. But that is only due to his driving style. If you always floor the throttle as he does, regardless if in town or highway, you can not expect good economy. Use higher fuel quality and your consumption improves, run an smaller rims/tyres for winter helps a great deal as well etc.

After all, we do have Chrysler engines underneath the bonnet (except the D with Toyota) and no high tech FSI and what have you stuff.

Just my 2 cents :smile: