FIC 1550's

[Jdabishop]

So I purchased FIC 1550's today for $280 and some people are saying that its better to go lower so I dont have to use easy tune.

Has anyone used these injectors and if so should I trade them for another set or keep them?

 

[clipto]

Those are to big if your running pump gas, they will be very chuggy driving you need 1000cc for pump gas get best idle/cruise daily driving. If your running e85 all day there great.

 

[Jdabishop]

Yea I plan on switching over to 85 only so you think itll be fine and I wont need the easy tune?

 

[airmail96]

If your using E-85 youll be fine, on pump gas you'll most likely have to bump up the idle some.

 

[gofer]

Run them. Most of the problems that come with a bigger injector at idle/part throttle conditions can be tuned out running ECMLink.

My car idles like a stock DSM on pump gas with 2150cc injectors. It's not just the size that creates the idle issues, these known issues are a combination of the DSM ECU's injector driver circuit and the heavy internals of those specific FIC injectors.

 

[Jdabishop]

Run them. Most of the problems that come with a bigger injector at idle/part throttle conditions can be tuned out running ECMLink.

My car idles like a stock DSM on pump gas with 2150cc injectors. It's not just the size that creates the idle issues, these known issues are a combination of the DSM ECU's injector driver circuit and the heavy internals of those specific FIC injectors.

Thanks gofer for clearing that up, For $280 including a afpr I couldnt pass it up but glad to hear itll work.

Talon is in pieces right now but link is my next purchase hopefully its painless dialing them in

 

[gofer]

Thanks gofer for clearing that up, For $280 including a afpr I couldnt pass it up but glad to hear itll work.

Talon is in pieces right now but link is my next purchase hopefully its painless dialing them in

Yea, that's a steal. I'm not saying with 100% certainty you won't have issues with them even after hours of tuning but why not give it a try?

PM me when you get the car back together if you need help tuning, I live right down the street.

 

[Moonlight GSX]

Run them. Most of the problems that come with a bigger injector at idle/part throttle conditions can be tuned out running ECMLink.

My car idles like a stock DSM on pump gas with 2150cc injectors. It's not just the size that creates the idle issues, these known issues are a combination of the DSM ECU's injector driver circuit and the heavy internals of those specific FIC injectors.

I take it should be just as easy tuning on the AEM EMS V2 as well? I was looking through the wizard and noticed that the injectors for FIC only went up to 950cc and was curious about it. Everything on web, Google searched, states that they can but doesn't necessarily say how to actually configure them. I also read on a thread here that their ECU has driver issues, I hope that doesn't mean I would also need to use their injector driver module...

 

[Jon91TSi]

I ran these injectors using both 93, and E85. While the car was still street driven, I could never get it to idle or cruise correctly. I discussed this with Tom and others quite a few times, and it comes down to the DSM Injector driver being unable to control them at very low pulsewidths. There really is no way around it, unless you run a stand alone and can change the driver. I tried everything from deadtimes, timing, voltage compensation, sizing, etc., nothing worked. I ended up selling them when I got an awesome deal on 2150's. The 2150's idle and cruise just like a stock 450, I am very happy with them. Unless you don't care about driveability, or you feel like ripping all your hair out and causing early baldness, feel free to run them!

 

[Arthris]

There is some misleading info on the injector drivers. Group of ppl have been playing around with the 1g code and have been successful at getting very small pulsewidths. There is a lot of coding that the ecu uses to calculate the minimum pw and when you use larger injectors this minimum pw becomes larger. If you want to read for yourself join dsmecu.com it'll be under swedensity thread.

 

[Jon91TSi]

There is some misleading info on the injector drivers. Group of ppl have been playing around with the 1g code and have been successful at getting very small pulsewidths. There is a lot of coding that the ecu uses to calculate the minimum pw and when you use larger injectors this minimum pw becomes larger. If you want to read for yourself join dsmecu.com it'll be under swedensity thread.

Unless you're burning your own rom's, which I doubt the OP is since he made no mention of this, you wouldn't have access to this in Link. I know it can be done, but because you don't have access to modify any portion of this code in Link it leaves a lot of users in the dark.

 

[Diamond Star Werks]

I ran these injectors using both 93, and E85. While the car was still street driven, I could never get it to idle or cruise correctly. I discussed this with Tom and others quite a few times, and it comes down to the DSM Injector driver being unable to control them at very low pulsewidths. There really is no way around it, unless you run a stand alone and can change the driver. I tried everything from deadtimes, timing, voltage compensation, sizing, etc., nothing worked. I ended up selling them when I got an awesome deal on 2150's. The 2150's idle and cruise just like a stock 450, I am very happy with them. Unless you don't care about driveability, or you feel like ripping all your hair out and causing early baldness, feel free to run them!

So why can you get 2150s to run like stock but not 1550s?

 

[Jon91TSi]

So why can you get 2150s to run like stock but not 1550s?

It has to do with how our ECU's driver controls the injector at low pulsewidths. The 1550 and 1650 low imp. injectors don't play nice with our injector driver due to the inability of our ecu's to control that large of a low imp injector at such short pulsewidths. This leads to erratic trims at idle, hesitation and stumbling at low rpm's, lean spots during tip in, and overall poor drivability during cruise. FIC released the easytune box to help these injectors play nice, and it works to an extent, but the only way to get them to work they way they are designed is to run a standalone with a different driver, or burn your own ROM with an altered code if you aren't running link.

As for the 2150's, FIC spent a lot of time during the design to get these to idle like stock and perform like stock below 2ms pulsewidths.

Maybe Jens can chime in and explain exactly why, but that's what I've gathered in the 3 years i've been messing with the 1550's and 2150's.

 

[Kapok6]

In my experience, the 1550's are a nightmare on pump. They got better with e85, but still idle is kind of unpredictable, especially with auxiliaries running, (fans, lights, a/c, etc). Cruise isn't as bad for me, and they are perfect at WOT.

Also, unless they brought it back, FIC discontinued the easytune box a while ago. The company that was making them for FIC went out of business is what I think they told me, (the conversation was a long time ago so I don't remember all the details.)

 

[Jon91TSi]

In my experience, the 1550's are a nightmare on pump. They got better with e85, but still idle is kind of unpredictable, especially with auxiliaries running, (fans, lights, a/c, etc). Cruise isn't as bad for me, and they are perfect at WOT.

Also, unless they brought it back, FIC discontinued the easytune box a while ago. The company that was making them for FIC went out of business is what I think they told me, (the conversation was a long time ago so I don't remember all the details.)

I had the same expereience. The reason they are better on E85, is because the engine requires more fuel, and you are a little higher in the pulsewidth range versus pump. Mine were also great at WOT, but unfortunately I couldn't drive around with my foot burried to the floor every second.

I believe FIC did discontinue the Easytune box, but you can still find them used from time to time.

 

[Diamond Star Werks]

It has to do with how our ECU's driver controls the injector at low pulsewidths. The 1550 and 1650 low imp. injectors don't play nice with our injector driver due to the inability of our ecu's to control that large of a low imp injector at such short pulsewidths. This leads to erratic trims at idle, hesitation and stumbling at low rpm's, lean spots during tip in, and overall poor drivability during cruise. FIC released the easytune box to help these injectors play nice, and it works to an extent, but the only way to get them to work they way they are designed is to run a standalone with a different driver, or burn your own ROM with an altered code if you aren't running link.

As for the 2150's, FIC spent a lot of time during the design to get these to idle like stock and perform like stock below 2ms pulsewidths.

Maybe Jens can chime in and explain exactly why, but that's what I've gathered in the 3 years i've been messing with the 1550's and 2150's.

Ok so 2150s are high impedance?

 

[Jon91TSi]

Yes they are.