evo/3g mas on 2g?

[twdorris]

from everything I've read before today e85 requires ~30% more fuel

I think someone, somewhere got confused on the direction of the math and somehow that has stuck. Gasoline requires 33% less fuel than E85. But that means E85 requires nearly 50% more fuel than gasoline.

Bottom line, E85 requires 50% more fuel than gasoline to maintain its stoichiometric ratio.

Worse case scenerario how would it react to a 1g auto fpr with the higher base pressure?

That would actually work out perfectly! Good idea.

750 * sqrt(43.5 / 37) = 813

So you'd end up with an effective injector size of 813 cc/min.

In theory, the injector size you would need on E85 to behave like 550s on gasoline would be:

550 / 0.67 = 821

So you're there! Go for it.

Thomas Dorris

 

[habitatguy187]

Thanks Tom! I still don't understand everything but I'll take your word and buy an auto fpr no problem. Can you tell me the stock WOT afr on a 1g? I can't find a real answer anywhere.

 

[twdorris]

Can you tell me the stock WOT afr on a 1g? I can't find a real answer anywhere.

Well, the "target" A/F ratio is about 9.3:1. You can download the stock tables (in extended format) off our website:

v3configs [ECMTuning - wiki]

You'll need to install our application first, though, to view the files.

ECMTuning, Inc.

Thomas Dorris

 

[donniekak]

I have found my biggest problem to be discrepencies between published, and actual flow rates of injectors, and the variance in e-85 mixtures. I burn eproms, so the first thing i do is to run the car on stock injectors, and fuel pressure, to dial in whatever maf i am using. Even with a perfectly dialed in air meter at stock boost levels, i've had to go back to recalibrate the meter at higher flow, because of the different curves inherent to the different meters.

 

[94awdcoupe]

Local here ran 720s on 99 car with evo 8 maf. Car ran really well. made 335hp on the dyno at 20psi with a gt30r turbo setup. Engine was stock with fp1 cams. big e-bay intercooler 3 inch exhaust. wideband at 14.7 at idle and cruise. 13.7 at tip in/part throttle. 12.5 at part throttle excell. a little rich at WOT at 10/1. I was amazed it ran so well for no ecu tweaking..

 

[DSMunknown]

Really? Something I will need to look into now.

 

[rlacasse1]

OK. One question here. When using the 3g MAS is it off a 2.4 or 3.0 engine from the Eclipse?

 

[Majikterror]

Will this MAS fit the same as a GM MAF? As in would it fit inside of my 3 inch Blow-Thru setup? I'm thinking about ditching the GM MAF and Translator.

 

[habitatguy187]

^^^^ No, this mas goes before the turbo.



EDIT: I did see a thread on another forum though where a guy with an evo ran the stock mas in blow-through and supposedly it worked really well. As far as actual fitment goes, idk.

 

[Majikterror]

Thanks. Anyone know the breakdown of model and years that you can get this mas from?

 

[jeffo]

The only Eclipse it was used on was the 2003-2005 GTS with the V-6 Variable Induction motor. All the other applications are the bigger motored Monteros, like 3.5 liter+.