Guys/Gals-

I need help with scaling my PTE 1200cc injectors for E85. I've been running the AEM on the 1200's but going back to the stock ECU set up.

Can someone throw out a number to start at for scaling on the 1200's so I'm not going from 100 to 1200 wasting fuel?

Also, for PTE 1000's on E85... Does the scaling of 522 sound right?

Thanks for your help. I'd like to get the AEM ripped out tonight and the stock ECU back in sometime tonight as well before I leave for Cali for 2 weeks. Evo will sit til I get back. Just need to have it running somewhat.

-E

 

Yo E hit me up I can give you a hand if you need it.

Mitch

 

Woot!!

Email being sent!

-E

 

Contact SpoolnupTuning on here. He has scaled quite a few sets of 1200's for E85 as well as a few 1600's on the stock ECU.

 

Delete

 

Here's a good reference for scaling injectors in general; for E85 your global scaling will be ~30% lower than your pump gas scaling.
https://www.evolutionm.net/forums/ec...injectors.html

 

I'm going to bump this because I'm having a MINOR issue...

I've pretty much got the 1200's scaled in except for a very minor detail that I've been chasing. My mid trim is spot on -0.3 and my low trim is being a pain in the *** at -12.4. Let me explain...

I've been reducing the latencies from 11Volts down to 7V about 10% at a time to bring my low fuel trim down. each 10% downward increment on the latencies does well for a while until the car just gives up and starts shooting for that -12.4 region.

Scaling is at 750

Latencies so far are:

5.568
3.144
1.92
1.248
1.008
0.528
0.312

I can only do so much before everything starts to get screwed up again. Can I get some insight on what to do to bring that damn low trim down to a reasonable level?

-E

 

Reduce latencies more. What do you mean the car gives up? If you reduce latencies, the low trim will go up (towards zero).

 

Razorlab gave me some pointers to try on the latencies.

Basically what's happening is that I can lower the latencies to bring the low trim into spec and it will do it for a whole day. and then the next day, the car's low trims want to hang out at -12.4. So I start taking more latency out. Car does perfect on the trims, then goes full tilt diving to -12.4 on the low.

-E

 

I think what could be happening is your trims reset to zero when you reflash your IX. But there's still too much latency, so after driving and idling for a bit it goes negative as it's seeing too much fuel...
Make sure your MAF scaling table is still stock as well..

 

MAF scaling tables are stock.

I'm not sure whats going on exactly, but what you described is exactly what thr car is doing. Happy as pie and then goes into a rage of fit on the low trim after awhile.

-E

 

I'll bet it is possible your latency values need to be near the rc or pte 1000's as the Precision might not flow a true 1200 at Evo fuel pressure.

injectors can be frustrating no doubt

 

Okay update time...

Implemented the change in the 14v region that Razorlab suggested. SUCCESS!! But wait, now the mid trim is heading for +12 territory when it was in the -0.xxx region with my previous latency. Low trim has now settled into -0.xxx with the Razorlab 14v latency.

-E

 

ohai guise....I'm your resident SuperMod, and I've cleaned out a lot of crap posts from this thread. I'm really quite busy so I'll just say this once: please keep this on-topic, factual, respectful, and helpful. Any further flaming or baiting will result in a ban. Ask around, I'm not kidding.

Thanks guys, carry on.

 

Take your global down from 750 and mid trim should go less positive