Ive searched on here and was unable to find a good starting point to get a base setting for these injectors. I am having a hell of a hard time getting them correct.

This is on 93octane!

First of all I do have some experience dialing in injectors, I've done them for my old pte1200cc and also my cousins fic 1450's. Took me sometime to dial them in but i had a good starting point from the "supermerge" thread.

Since I couldn't find much information on here I decided to start with the ball part of the fic 1450's and just lean it out about 50-100 for the scaling to start off.

Let me begin, first off I did not mess with the latencies(listed below) and just started messing with the scaling itself.
I started off with a scaling of 1462 and my short trims went to +25.
Thinking ok, I should lower the scaling to add fuel.
Lowered it to 1329 still +25. Kept going lower on the scaling and lower and realized that ok something else must be off. I went down to the 900's.. I know it sounds ridiculous but i wanted to see if it would make any difference what so ever.

Then I went back up scaling 1329 raised my latencies and finally I saw the short trims go -25.

So I tried to play with it a bit more and am just all over the place!
Either I'm loosing it, had to much **** on my mind or just fu****. Yes I was sober when doing this.

Here are my latencies I'm using. The reason I am putting down my latencies is because they must be really off for my scalings not to make any effect at all.

Latencies:
3.192
2.209
2.112
1.512
1.296
1.104
.696

The latencies which I had when playing with just the scalings were:
3.00
2.496
1.944
1.320
1.128
.864
.744


Played with this crap for an hour and knew something was really off...just wondering what I should do?
Where I should start from??

 

Search, search again and then read it all. It's here. I just scaled my FIC 1050s in 30 minutes using the information on this forum.

 

That's the problem. There is sufficient information on the 1050s but very little on the 1550 which the OP is referring to and also the 1650s from FIC.

 

Just looking for a good base line to start from...

 

I believe the 1650 , are discontinued cause they had issues . That's why I went with 1550

 

OK I believe Im on the right path. Here is what I did, I knew that the scaling couldnt be less than the FIC1450 (1329) and couldnt be more than 1500.

After sometime I got Low LTFT at -5 . Going to go for a cruise shortly to see if my mids will be good. I doubt it, since **** is never that easy for me!

Scaling is at 1462
Latencies:
3.096
2.400
1.800
1.512
1.416
1.320
1.104

 

Are you disconnecting the battery every time after reflashing the car? This is the only way on an Evo 8 to reset the trims.

 

Is this car a MAF car? Have you done the Min IPW patch yet?

 

This is a mirror image of the FIC latencies for the bluemax 1550's according to their spec sheet.

4.69 2.112
7.03 1.848
9.38 1.632
11.72 1.368
14.06 1.152
16.41 0.936
18.68 0.72

I'm not sure what the scaling should be though.

-Jamie

 

There is an easy way to see if the latencies are off or if its the minimum IPW or MAF scaling that needs adjusting.

Reset your fuel trims and log your STFT MID while cruising at 2000rpm for 15 seconds at a constant speed on flat road. Then raise rpm to 2500, then 3000,3500,4000,4500,5000.

Find the average STFT for each RPM. If your latencies are good, they should all have roughly the same amount of trim. If latencies are correct, the trims should be linear across all RPM. Just comparing the LTFT LOW and LTFT MID doesn't always tell you where the variance actually is.

-Jamie

 

This is on the stock MAF.

I thought the MIN ipw patch was only needed for SD. Is it needed for the stock maf??

Jamie
Thanks for your response. Im going to give that a shot tomorrow to see how that goes.

So far this is what Ive done. I disconnected the negative terminal from the battery for 5 minutes before each flash.

I idled the car for 30minutes and my Low trims were fluctuating from -2 to 1.
The odd thing is the car would die randomly. It would loose idle and just shut off. The longest I got the car to idle for without shutting off is 20minutes. It would just drop below 1k and not be able to pick itself up.

After my idle trims looked good I started driving the car to see how my mid trims are. I drove for a good 35 minutes going between 45-60mph in fifth gear. My mid trims were 2 and went lowest to -1. After getting off the highway and driving on the street , I was hitting some stop lights. Now its 45 minutes into the drive I notice my low trims at +12.

Is that normal? When I idle the car for 25minutes my low trims look good. After 35 minutes of driving on the highway and a good 10-15 minutes on a straight road with lights my low trims change. My mid trims at the end still looked good. As in "good" I mean within +-5.

This is on 93octane.
Scaling :1462
Latencies
4.6875 3.504
7.03125 2.496
9.375 1.704
11.7188 1.392
14.0625 1.296
16.4062 1.200
18.6768 .912

 

what ever happened with this? did you get it figured out? im having the same issues w my 1450's