90 day average over 90 MPG

[funkhoss]

Originally Posted by Gasoline Fumes

What about modifying the TPS and/or MAP signals to hide the true load from the ECU?

Interesting idea! I'm pretty sure that on the Metro the closed/open loop threshold, once operating conditions for closed loop are met, is based 100% on TPS position vs. RPM (as it is on the Caprice and other ECUs that I'm familiar with). So, it's very likely that the only signal that would need modification is the TPS signal.

The question is: how would so doing affect the engine's operation in other ways?

Ultimately, it would be more about convenience than necessity. It is possible to keep it in closed loop at high load--you just have to be very careful about throttling.

-Funkhoss

[laser3kw]

mind blowing mileage!
I see you run non-ethanol gas also. That pushed my car over the hump for gas mileage. My ecu has no aftermarket support so software hacks are out. I want to explore some sensor mods but don't want to push advance to the point of cracking the head or burning the valves.

[Silent Blood]

Originally Posted by funkhoss

Interesting idea! I'm pretty sure that on the Metro the closed/open loop threshold, once operating conditions for closed loop are met, is based 100% on TPS position vs. RPM (as it is on the Caprice and other ECUs that I'm familiar with). So, it's very likely that the only signal that would need modification is the TPS signal.

The question is: how would so doing affect the engine's operation in other ways?

Ultimately, it would be more about convenience than necessity. It is possible to keep it in closed loop at high load--you just have to be very careful about throttling.

-Funkhoss

Some engines run without any enrichment, for example the Toyota Prius, or an old Mercedes M119/120 - engine from a certain year on. Issues? Obviously none. I think, this enrichment occurs often too early or too strong. A few years ago, I saw a german examination about exhaust pollutant of modern cars. It shows, that cheaper cars tends to enrich the fuel / air mixture way earlier than expensive cars. I guess, it´s just cheaper, to just enrich it, unstead to estimate, on which rpm or load this enrichment is really necessary.

[hayden55]

Originally Posted by funkhoss

I've attached a pic of the car that I took this morning.

-Llumar Air 80 "clear" window tint (for interior heat reduction)

-Funkhoss

Funk,

Can you buy this tint for self install? I have 3m Crystalline but its a racket. They will only sell to dealers who want an arm and a leg to install it and they are few and far between.

[funkhoss]

Originally Posted by hayden55

Funk,

Can you buy this tint for self install? I have 3m Crystalline but its a racket. They will only sell to dealers who want an arm and a leg to install it and they are few and far between.

That I do not know, unfortunately. I had someone local to me, whose labor charges were quite reasonable, install it on both of our cars.

I can say that it does seem to work, though!

-Funkhoss

[hayden55]

Originally Posted by funkhoss

That I do not know, unfortunately. I had someone local to me, whose labor charges were quite reasonable, install it on both of our cars.

I can say that it does seem to work, though!

-Funkhoss

I'm a huge fan of that style of tint as well. It makes a crazy difference.

[freebeard]

The last tank in my XFi was an embarrassment. So I found the thread interesting. The first thing that stood out was the bumper hitch. What's that like?

The other thing is burning clear premium. That's all I've ever burned in the Superbeetle {everyone wonders why I don't just replace all the fuel lines).

How does that work out in dollars/mile?