Stinger: ECU setup questions

[suprahero]

I'm curious where everyone has their settings at in the ECU setup. I've been having problems with my car breaking up in the higher rpms (6500 and above) @ approximately 20psi. I think I can change a few things that will help it, but I wanted to see where you guys have yours set at.

If you don't mind, fill out the template so we can compare them with others.

1jz, 1.5jz, 2jz: 1.5
Turbo size: PT 67
Exhaust housing: .81
Dwell mS: 3.1
Injector ohms: 4.5
Sensitivity: Normal
Acceleration Enrichment: 30%
Enrichment Duration: 45
Hard Rev. Limiter: 7600
Boost cut: 25psi
Deceleration fuel cut: 11.8

When I put my Injector ohms on 10-16, it idles ten times better, but under wot, it feels like it doesn't run as good. What do you guys think about the injector ohms and where is yours at?

I know we already had another stinger thread started, but I couldn't find it. I would also like to know if anyone has successfully got the two step working. Thanks and all info will be greatly appreciated.

 

[IJ.]

Try a bit more dwell J and see if it lessens, say 3.6m/s

 

[suprahero]

It was set to 3.5 already when I bought the Stinger. I didn't know which way I should go to help it. I was told to go lower so that's where it's at right now, but it's been too dam'd hot to drive it and test it out. I will try going higher than the 3.5 and see how that helps.

What do you think about the ohms Ian? When I put it on 10-16 my car idles like stock. Then next option is 4-5 and that's where it was set at when I bought the Stinger.

 

[IJ.]

More dwell = fatter spark J

You need to get some data on how hard the coils you're using can be pushed before they fry.

Not sure on the Injector resistance as MoTeC do it very differently, it will depend on which injectors you're using if they're low or high resistance.

 

[10secdream]

I thought it was mentioned that the Stinger does not directly control the amount of dwell but rather the igniter does? I may be wrong on this matter but I thought someone mentioned that at one point?

1jz, 1.5jz, 2jz: 1jz
Turbo size: Apexi IHI C7 (66mm)
Exhaust housing: Neverchecked
Dwell mS: 2.125
Injector ohms: 4.5
Sensitivity: Normal
Acceleration Enrichment: 7.2%
Enrichment Duration: 25
Hard Rev. Limiter: 8000
Boost cut: 24psi
Deceleration fuel cut: -11.75

I have boosted up to 19 psi and I have zero issues with breaking up. My coils have around 40k miles on them and I have new coil pack wires. Running NGK copper plugs at 0.024 plug gap. My ignition amplifer is a Kenne Bell Boost a Spark running about 14-15 volts.

 

[10secdream]

Also Jay make sure you arent running too rich either because I know you can get rich misfire as well.

 

[IJ.]

Would depend of you're running smart of dumb ignitors, I always use dumb and let the ECU control it as I can have a High/Low Dwell table mapped to boost.

 

[10secdream]

Well would the stock 1J/2J ignitor be considered "smart" then?

 

[IJ.]

I would suspect it would be but wouldn't know for sure sorry!

If it is again only a guess but I'd think you'd use minimal dwell ie: 1 Ms or so as it's only telling the Ignitor "NOW is on time do your thing"

This is why I like to use dumb ignitors as you can drive the coil harder and most times get around the need for the 1.21gigawatt ignition systems

 

[suprahero]

Thanks for the feedback guys. I will try a few things out and report back to you. Unfortunately, it's 97 degrees here and I'm not really in the mood to see how hot my leather seats are at the moment. I'll check this out this evening though. Thanks again.

As for the richness, it is running a bit rich. It is about 10.2 or there abouts at wot. I need to get one more good tuning session now that I've got the larger ar housing on my turbo. Maybe all of this will help with my tuning.

10sec..........do you not get a small lean miss when you first floor it due to the low acceleration enrichment. I used to have mine on about 12% and it would have a small hesitation. I switched it to thirty percent and it completely did away with it.

 

[10secdream]

Jay I don't get a miss with my enrichment that low but every setup is different right? I would say you are running a tad bit rich and might be getting rich misfire. Try to aim for 11's with meth and it should be fine.

 

[suprahero]

I'll let you guys know how it goes once I get in touch with the dyno for an appointment.

 

[RacerXJ220]

I'll let you guys know how it goes once I get in touch with the dyno for an appointment.

Wasn't that today ?

 

[suprahero]

I didn't get in touch with him Jeff. I'll try again today.

Post up your numbers as well.

 

[gravesdu_99]

1jz, 1.5jz, 2jz: 1jz
Turbo size: GT4082
Exhaust housing: Neverchecked
Dwell mS: 2.125
Injector ohms: 3.5
Sensitivity: Normal
Acceleration Enrichment: 6.4
Enrichment Duration: 45
Hard Rev. Limiter: 8000
Boost cut: boost controller
Deceleration fuel cut: -11.8

If you are running a stock jz ignitor then you should be around 2ms. Like said before the jz ignitior is a smart ignitor.

suprahero- not sure if this will help, but are you running the 720 arrangment. I read that this should be used for large injectors. Also I've found that running higher fuel pressure levels helps with large injectors

 

[suprahero]

I haven't changed my ms to 2.1 yet. I'm not sure my injectors would be considered large since they're only 624's. I'll look into it though. Thanks.

 

[suprahero]

Why is your injectors ohms @ 3.5? Does that have something to do with the size of the injectors?

 

[gravesdu_99]

I have 640cc injectors and I'm running 40psi of fuel pressure. When I measured the inpendance of the injector I think they were 7 ohms, don't really remember now. The stinger runs the injectors in parallel so you take half the resistance. Better way to do it is to take the plug that goes into the stinger and measure the impedance on the injector wires.

How does the car rev with the dwell set at 3.5ms. I was told that it would have a hard time reving past 6grand.

 

[suprahero]

Mine has been at 6.5 since I got it and I've made hundreds of pulls up to 7500rpm. I just recently started having problems with it breaking up in the higher rpms in third and fourth gear @ 21psi. I'm going to the dyno friday evening and I'll tinker with dwell to see where it likes it.

 

[10secdream]

Mine has been at 6.5 since I got it and I've made hundreds of pulls up to 7500rpm. I just recently started having problems with it breaking up in the higher rpms in third and fourth gear @ 21psi. I'm going to the dyno friday evening and I'll tinker with dwell to see where it likes it.

I am assuming this is with meth and the higher boost? I dont think its the dwell as it is a smart igniter and the stinger has no control over dwell. I would just play with your tune and plug gap.