itzwolf

iTrader: (9)

Haven't seen data posted about these injectors like I have for many others. What are people ending up with for scaling and latencies?

I just reinstalled mine last night after chasing some fuel issues and taking the car back to as stock as possible to verify and fine tuned my MAF scaling again on stock injectors.

So now its time to get mine dialed in again provided they were not a big contributor to my original issues which after last nights initial testing I am feeling may actually be a possibility.

itzwolf

iTrader: (9)

Bump.

Slowly dialing them in and the scaling and latencies are so far much lower than advertised and looks like it will take even less to get them close.

jessej

mine on e85 are as followed scaling 770,battery latency top to bottom 3.810, 3.405, 1.830, 1.245, 0.945, 0.705, 0.540
pump gas scaling is 1125 battery latency is the same as above

itzwolf

iTrader: (9)

Thank you for the reply!

I was given them scaling numbers to try and they definitely don't even come close for me...

As of right now I am on

Scaling - 1044

Latency:
3.615
3.195
1.620
1.035
0.780
0.555
0.390

And this has gotten me fairly close with my log on the way to work this morning showing idle about -1.5 to -2% and cruise about +3 to +5%.

I've tried scaling from 1218 (idle is almost perfect cruise very positive +10% or more) down to 1008 (cruise is almost perfect idle is very negative like 9-10% or more where the trims completely stop) and latencies from what you are using down to what I have currently.

My MAF is scaled about as perfect as you can ever get with a +/- 1.75% or less from idle to cruise over several days of logging and some temperature swings so the issue is isolated to the injectors only.

itzwolf

iTrader: (9)

Do you have access to the Low Pulse Width IPW Adder table and is it modified from stock?

Mind posting it if so?

jessej

here ya go let me know if this helps at all. Base latency is 0 out, i didn't have to adjust the cold start tabs till i switched to E85

itzwolf

iTrader: (9)

Again thank you for sharing!

So your pulse width adder is stock and the only tuning needed was the scaling and latencies for these to work on pump gas, correct? E85 I'd expect for the cold start to need some adjustments.

I initiated a trouble ticket with Injector Dynamics and they told me not to worry what the numbers are since stock ecu was reverse engineered, MAF is aftermarket, and there was no pulse width adder table so no way to tell whats really going on. I responded with my concern that my scaling is now at 1008 and latencies (shown below) to close the gap between idle and cruise are a lot lower than what others are successfully using, my MAF was dialed in perfectly, and I have a pulse width adder table defined that I can tune.

Current latencies:

3.6
3.18
1.605
1.02
0.765
0.54
0.375

Also this point that was said:

Goes totally against the fact my latencies are significantly lower than their published numbers when that statement says they would be higher.

Your latencies match what I was given from a well known and trusted tuner except the scaling was at 1218. All this really makes me question my injectors...

IFuXwiTuZ

iTrader: (3)

This is what i have mine set to (might not be perfect but work good for me)
93 octane
ID1300 Hi-Z

1170

Battery Voltage
4.6875
7.03125
9.375
11.71875
14.0625
16.40625
18.6767578125

latency
3.312
1.68
1.032
0.864
0.624
0.456
0.336

itzwolf

iTrader: (9)

Interesting so your latencies are even lower than what I was using but scaling is higher. That is for an Evo X correct, because your profile says drives 2006 Evo. What are your trims floating at and stock MAF or aftermarket?

I've been in contact with Injector Dynamics further and have gotten a little more information from them. I'm also awaiting some Low Pulse Width Adder table information that should be able to drop right in based on base fuel pressure.

Also according to ID the Minimum IPW is 1.1ms:

chetrickerman

iTrader: (7)

Here is my scaling and latency. The left scaling is 91 and the right is E85. The fuel pressure is set exactly at 43 psi. The fuel trims stay between -1 and +1

itzwolf

iTrader: (9)

Thanks Chet.

How are your trims with AC on vs off? I still get some pretty crazy swings both ways at times when AC is on but when off trims stay consistent. This has made me bump the MAF scaling a touch...

It's at a point the trims always work vs the scenario where they would flat-line after a while and car would idle in the 11's.

Have you played with the Low Pulse Width table any?

My current scaling and latencies I've been running for some time now are below.

Scaling - 1008

Latency:
3.615
3.195
1.620
1.035
0.780
0.555
0.390

chetrickerman

iTrader: (7)

I don't have a/c

I haven't had to mess with the low pulse width table very much

itzwolf

iTrader: (9)

Ahh darn. Well nice to see your latencies are identical to mine where it counts. I can't give up AC, Florida = to damn hot and this is my daily.

Deannn

iTrader: (1)

Did you get it sorted? im having issues too specially with aircon on it leans right out.