Sounds like they just need some fine tuning for drivability. They're basically the same injector as my FIC's. Most of the big injectors cars I've driven tend to swing rich momentarily before going to fuel cut when you lift.


The behavior you're describing up top does seem weird. And you can see the choppiness in the IDC and RPM line, but nowhere else. Not even fuel pressure.

 

This. I was able to dial out all light throttle issues with very detailed tuning of the injector linearization table and the MAF scaling. You may have some challenges with ID injectors for this though. The ID1300 and ID1700 injectors (and maybe even the new ID1050x injectors) have a very unusual partial pulsewidth flow response that requires negative compensation values in a portion of in the injector linearization table. However, the Evo engine control code (including the Evo 10) cannot do negative values in that table, so its a bit of a loss. The extent to which this will be an issue will depend on how often you drive with the injectors in the pulsewidth range where behavior occurs, how strong of a correction is needed, and whether you can compensate by other means.

 

I forgot about the linearization table. I'll take a look at that too. Thanks!

 

The GM EFI Live calibration tables that ID provides have the information needed to adjust the Evo table. Main issue will still be that it won't be possible to enter negative values where needed. You'll have to compensate in some other way.

 

Perfect! Thank you, super helpful.

 

Took the plugs out and they where all at .022-.023 even though I remember gapping them to .021... hrm.

Dropped one in the process so put a new one in and gapped them all down to .018, this took care of the issue. It revs clean now.

Also mapped the linearzation table like Mrfred posted above, that took care of about 90% of the issues I was having with the ID1700s. Next is fine tuning the other 10%.

Here is now at 27psi, E82. It's kinda scary fast now. I think I am going to keep it here for a bit and get used to the car, plus I still need to do the track tune.

Datalog for anybody interested: https://datazap.me/u/razorlab/5858e8...5&zoom=114-410

I also think the 5858 is starting to lose steam here. I am ramping up the WGDC out the top and it still tapers a little.

 

This turbo is rated @ ~ 600 - 620 hp .... sounds like you are there!

 

You should be able to make more boost down low and get more torque out of it. That flat torque curve is for stock rods. Should be able to make 450-500ftlbs down low.

 

On purpose, rather not destroy my ACT HDSS quickly

 

Ah man. Should have an Exedy twin in it while it was apart.

 

was already spending way too much money. Plus my attention was towards track use so I knew I wasn’t going to be doing a “send it” tune

 

Send it tunes are fun for street shenanigans though...LOL

 

I'll get in enough trouble already.

 

Great. I guess you used zeros in places that called for negative values? MAF tuning should take care of the rest of the issues.

 

After driving it for a bit the last couple days I retract my statement. I would say it took care of about 75% of the issue.

Yes I used zeros for the areas that called for negative values.

It's for sure better overall but still does some grumbly bits at low throttle / low load cruise situations and now 1st and 2nd gear driving slow, the transition between some throttle and decel is super harsh. The car will buck pretty badly in 1st gear. Need to figure out why it's doing that all of a sudden. Is the 0 requested PW entry really supposed to be set to 0 PW adjustment?

Also now noticing that sometimes at highway cruise decel when IPW is at 0 (injectors are off) that the car sometimes maxes out positive STFT. Never seen that behavior before. Usually STFT's just go to zero.