On my stock turbo full weight car my 850s are maxed out. I would do min of 1000's. Also I have done 3 cars now with RC1000s and my gas flash is not that bad at all with the big injectors.

The E85 does seem to be amazing stuff in letting you be stupid and have not major carnage. I don't see any power gains past a 12.0 on a gas WB. I have made a few mid 13s pulls with no carnage. Not sure if its a stock ECU thing but my car will run high 12s 1st through the middle of 3rd and than level out in the mids 11s all the way through 4th.

 

THANKS bro so your saying rc 1000's and base flash from 93 tune works okay? besides maybe leanin allitle if a/f is at 10 right?

 

Bump! Using a good ol' Zeitronix wideband, what AFR should I tune for on this "gasoline" wideband for maximum, but safe results?

 

you tune to what ever you want. the wideband will still read the same. most tune from 11.0 to 12.5. id say shoot for 11.5


ill ask this again....

HAS ANYBODY TRIED SOMETHING BIGGER THAN 1000'S WITH E85 AND ECUFLASH.

 

Agreed. So, is there any trick in off-throttle, part throttle tuning with the stock ecu? I could imagine the fuel trims going crazy with 1000cc injectors....

 

Bringing back an old thread instead of starting a new one.

If I put some 850cc injectors in the car and run straight E85 should I leave the injectors dialed in for the stock setup and tune via fuel table or should I spend the time dialing in the injectors?

 

Dial in the injectors. Start by changing the global scaling to about 30% smaller, then adjust latency as you would normally do for gas.

I'm unfortunately not speaking from experience (yet), but this is what I've learned from those who have made the switch.

 

I think I have to dial them in for 30% smaller. Thats kinda what I'm getting at. Will it be close enough to use the stock injector settings and then make adjustments via fuel table?

 

I honestly don't know, but I'm not understanding why you wouldn't just dial them in with the global scaling and latency as you would with any larger set of injectors...are you afraid of the latency table? I always thought it was kinda sloppy to find maps that have been "tuned" in the map rather than via scaling/latency.

 

If you dial them close enough, then yes the tables will be pretty close.

You will know that you dialed them right by looking at STFT's at idle. Once that's close to 0 (100 in evoscan), go for a ride after that check LTFT's. Before going for a ride reduce afr's in your tables by 3-5 points for safety and don't push it too hard.

 

Coming from DSMLink I'm familiar with the fuel trims and all. I guess my thought is I need 30% more injector so instead of sizing my 850 at 700 I would size them 30% smaller and then my fuel table would be more realistic. Otherwise sizing them to their actual size I would need to put unrealistic values in the fuel map.

Having 850s listed as 560s would provide a bit more than 30% but the regular fuel map would be closer to actual AFR values espcially with lean spool turned off.

 

My 1000 are scaled to 609. So yeah, 39%