Five-0 motorsport Injectors tuning thread

[03aksuby]

You get what you are paying for I guess. If you want to drop over $2k on a fuel system go for it. There are a lot of people that have had great success with these and at a price point you can't beat. Im not giving up just yet.

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[Phatron]

If you're trying to run a 1200cc+ injector on pump gas...then you're asking for poor performance.

If you're not going to run e85 99% of the time then choose a different route like meth or race gas.

The erratic swings in fuel trims are due to the non linear flow of big injectors at low ipw.

[mecpgh]

Originally Posted by Phatron

If you're trying to run a 1200cc+ injector on pump gas...then you're asking for poor performance.

If you're not going to run e85 99% of the time then choose a different route like meth or race gas.

The erratic swings in fuel trims are due to the non linear flow of big injectors at low ipw.

Yes, I get swings on E as well, a slight slight hit on my fpr for increased base fuel pressure made a nice difference in low load consistency and smoothed it out, I'm going to do bigger lines with adjustable fpr before I decide to bail on these

[fastblueufo]

Originally Posted by Phatron

If you're trying to run a 1200cc+ injector on pump gas...then you're asking for poor performance.

If you're not going to run e85 99% of the time then choose a different route like meth or race gas.

The erratic swings in fuel trims are due to the non linear flow of big injectors at low ipw.

I think you should include that your statement is directed at high impedance injectors there Ron.

My precision 1250cc idle like stock on 93 no problem. No non linear flow when fueling is graphed out. Never a missfire. Granted these are low impedance injectors. I've also ran the ford motorsports 1600cc low impedance injectors without issue. And they are one of the cheapest made low impedance injector you can get. I would never try and run a large high impedance injector. If your going to run a big injector it should be a low impedance (peak and hold) injector. At least if your looking for a decent idle quality. Yes, its a bitch cause you have to wire in an injector driver. But the benifits are well worth the trouble. And the dead times of a peak and hold injector are half what high impedance injectors are.

[Phatron]

better go over here and start a debate

http://forums.nasioc.com/forums/show....php?t=2287355

Originally Posted by No Limit Motorsport

Don't bother with these injectors on a Subaru. Your going to have to modify the TGV and fuel rails to make them work. In addition this is a low impedance injectors which means you will have to wire up a resistor box. Lastly they don't run as smooth as the newer high impedance stuff.

I sell a lot of these to people with B series Honda's and older Mitsubishi's who don't want to spend the money on the newer, more expensive injectors.

In your case if you want a 1600ish CC injector go with the 1680cc Fuel Injector Clinic.

They are plug and play, scale, run, idle and drive perfect. They can be used on a stock ECU car with no issues.

Adam

[fastblueufo]

Originally Posted by Phatron

better go over here and start a debate

http://forums.nasioc.com/forums/show....php?t=2287355

Lol I see somebody has no experience with peak and hold injectors. You can't run a resistor box from an old honda ecu. You need to have a full on peak and hold driver like AEM or FJO. I personally like the AEM unit but I am running the FJO atm with great results so far.

[Phatron]

I don't think he said to anything about running it on a stock Honda ecu....he just said lots of cheap Honda guys buy them

[renosubby]

Originally Posted by sorrowfulkiller

What sizes have you used mostly?

1000,1400,1600 a few 740 side feed and 1200 sidefeed.

[subydude]

Anyone have 1200cc top feed EV14's and willing to share latency and other specs? I've got a slight stumble at idle and when lifting off the gas on mine and wanted to start digging into it.

[sorrowfulkiller]

Originally Posted by fastblueufo

Lol I see somebody has no experience with peak and hold injectors. You can't run a resistor box from an old honda ecu. You need to have a full on peak and hold driver like AEM or FJO. I personally like the AEM unit but I am running the FJO atm with great results so far.

If anyone else is interested in a driver box for peak and hold injectors there is a box made for megasquirt that is only $60, better than spending $200 or more.

[fastblueufo]

Originally Posted by Phatron

I don't think he said to anything about running it on a stock Honda ecu....he just said lots of cheap Honda guys buy them

I just said that because a lot of guys will try and cheap out of buying a peak and hold driver and buy a resistor box from an old honda sitting in a junk yard. I only know it doesn't work as good because I tried to cheap out by using one myself . But only for a minute..

[Phatron]

I've never personally tried them, but how
Come no limit says they are worse and not to bother with them?

And if the latencies are half of high imp Inj then the min ipw parameter in the ecu is going to become a hassle isn't it?

[fastblueufo]

Originally Posted by Phatron

I've never personally tried them, but how
Come no limit says they are worse and not to bother with them?

And if the latencies are half of high imp Inj then the min ipw parameter in the ecu is going to become a hassle isn't it?

I'm not sure why he would say that unless its his experience trying to tune them with resistors. I've personally not needed to tune on anything with larger than 1600cc injectors. I guess if you were trying to run the 2000cc it might. Get one of the rr guys to make a def for min ipw on whatever rom your working with. Then you could lower it.

[mecpgh]

Originally Posted by fastblueufo

I'm not sure why he would say that unless its his experience trying to tune them with resistors. I've personally not needed to tune on anything with larger than 1600cc injectors. I guess if you were trying to run the 2000cc it might. Get one of the rr guys to make a def for min ipw on whatever rom your working with. Then you could lower it.

Ya I have no need to lower ipw on pump or E with my 1600s. I just need to get them atomizing better at idle.

Just a little extra load such as a/c compressor running smooths it out nicely
Light weight flywheel ftl......

[C J]

I hope I'm not another victim of these injectors. Been working with my tuner and we are having a hell of a time getting it to run right. It will idle fine one minute and cruise fine but once you try to transition from cruise to idle the car either does or barely runs at 3-500rpm while running rich as hell.

[mecpgh]

Originally Posted by C J

I hope I'm not another victim of these injectors. Been working with my tuner and we are having a hell of a time getting it to run right. It will idle fine one minute and cruise fine but once you try to transition from cruise to idle the car either does or barely runs at 3-500rpm while running rich as hell.

What size injector what fuel? I had to go way high on the latencys to get mind to idle better from what they recommend on the spec sheet

[C J]

1200cc sidefeed. E85.

I just want it to idle. If I can get it to run without dying thats all I want at this point.

[Phatron]

Your going to drive yourself nuts trying to run a big sidefeed.

I suggest going top feed....

[mecpgh]

Originally Posted by Phatron

Your going to drive yourself nuts trying to run a big sidefeed.

I suggest going top feed....

Yep. Unfortunately

[C J]

It is in the plans but as for now...I just want to get it running/driving. What can be done? I don't care about idle quality as much as I just want it to recover from cruising and return to idle without dying...

[mecpgh]

Originally Posted by C J

It is in the plans but as for now...I just want to get it running/driving. What can be done? I don't care about idle quality as much as I just want it to recover from cruising and return to idle without dying...

I had to increase my latencys around .15 across the table from the spec sheet which made a huge difference but I have top feeds.

Still worth a shot

[C J]

Thanks for the tip. What kind of problems were you experiencing prior to changing the latency?

[mecpgh]

Originally Posted by C J

Thanks for the tip. What kind of problems were you experiencing prior to changing the latency?

The same issue coming down to idle. My low load cruise is now smoother as well

[C J]

So it would just die? Or stumble really hard at 3-400rpm?

Would it get really rich while trying to stumple/run as it tried to recover?

[mecpgh]

Originally Posted by C J

So it would just die? Or stumble really hard at 3-400rpm?

Would it get really rich while trying to stumple/run as it tried to recover?

Stumble hard trying to recover either rich or lean sometimes the afr would be ok but it would still stumble hard trying to compensate anyway. And the ecu will learn over time and it will smooth out. Once you get it a close as possible so it doesnt stall they drive it for a while and watch it get smoother