FIC 1050s installed today - observations and a question
#16
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One thing I have noticed as well is my FPR continually keeps wanting to drop my fuel pressure for some reason. I have rebuilt it about 8,934 times now, and it keeps doing it. I can tell when it needs another rebuild when my Fuel Trims start going wack-o. This might be the reason why my Global Scaling is set to 1083 as well, due to the fuel pressure not being set to factory idle spec of 34psi (If I remember my manual correctly)
#17
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Welp,
I tuned a Evo today with FIC 1050's. Fuel trims are within +/- 2.
But yup, won't start worth a damn. Also likes to die in clutch in coming up to a light.
If I put the gas to the floor (WOT) on startup, it starts up clean. Doing this shuts off the injectors while cranking (like what you would do for a compression check)
I've tried higher and lower ms at 4.69v to 11.72v. I noticed it got a little bit better with higher ms then lower. With lower it didn't even want to start at all.
I'm going to tweak around with it a bit more tomorrow.
On the same note, I've tuned two evo's so far with RC 1000cc injectors and they have had no issues whatsoever. Start up like stock injectors without much latency fuss, never even come close to dieing at the light.
I tuned a Evo today with FIC 1050's. Fuel trims are within +/- 2.
But yup, won't start worth a damn. Also likes to die in clutch in coming up to a light.
If I put the gas to the floor (WOT) on startup, it starts up clean. Doing this shuts off the injectors while cranking (like what you would do for a compression check)
I've tried higher and lower ms at 4.69v to 11.72v. I noticed it got a little bit better with higher ms then lower. With lower it didn't even want to start at all.
I'm going to tweak around with it a bit more tomorrow.
On the same note, I've tuned two evo's so far with RC 1000cc injectors and they have had no issues whatsoever. Start up like stock injectors without much latency fuss, never even come close to dieing at the light.
Last edited by razorlab; Jun 10, 2008 at 08:24 PM.
#19
Welp,
I tuned a Evo today with FIC 1050's. Fuel trims are within +/- 2.
But yup, won't start worth a damn. Also likes to die in clutch in coming up to a light.
If I put the gas to the floor (WOT) on startup, it starts up clean. Doing this shuts off the injectors while cranking (like what you would do for a compression check)
I've tried higher and lower ms at 4.69v to 11.72v. I noticed it got a little bit better with higher ms then lower. With lower it didn't even want to start at all.
I'm going to tweak around with it a bit more tomorrow.
On the same note, I've tuned two evo's so far with RC 1000cc injectors and they have had no issues whatsoever. Start up like stock injectors without much latency fuss, never even come close to dieing at the light.
I tuned a Evo today with FIC 1050's. Fuel trims are within +/- 2.
But yup, won't start worth a damn. Also likes to die in clutch in coming up to a light.
If I put the gas to the floor (WOT) on startup, it starts up clean. Doing this shuts off the injectors while cranking (like what you would do for a compression check)
I've tried higher and lower ms at 4.69v to 11.72v. I noticed it got a little bit better with higher ms then lower. With lower it didn't even want to start at all.
I'm going to tweak around with it a bit more tomorrow.
On the same note, I've tuned two evo's so far with RC 1000cc injectors and they have had no issues whatsoever. Start up like stock injectors without much latency fuss, never even come close to dieing at the light.
#20
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mrfred, have you tweaked your posted values at all, or still rolling with them as-is? Looks like it'll be at least sunday before I get to put mine in...I have to install an HFS-1 and help put a motor into an S4, then wrench on and help tune a 996tt, 3 more S4's, and a VW first.....and I'm in IT, NOT wrenching for a living! Yeash!
Last edited by scheides; Jun 10, 2008 at 09:21 PM.
#21
mrfred, have you tweaked your posted values at all, or still rolling with them as-is? Looks like it'll be at least sunday before I get to put mine in...I have to install an HFS-1 and help put a motor into an S4, then wrench on and help tune a 996tt, 3 more S4's, and a VW first.....and I'm in IT, NOT wrenching for a living! Yeash!
#22
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I don't feel so unlucky now. I'm having no problems with the engine dying under any circumstances, and no one else using FIC 1050s has mentioned issues with starting or stalling. Perhaps we're both isolated incidents? Also, I've noticed that the resistance to starting doesn't seem quite so bad now. Not sure what to think of this yet. Need a few more days to observe. What scaling and latencies did you end up with?
272/272 cams where installed as well so I need to double check those as well.
#26
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Obviously, there can be a number of causes, but the messed up MAF readings are the main cause from my experience.
Last edited by l2r99gst; Jun 13, 2008 at 11:56 AM.
#27
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Well the car had the induction pipe before the cams and 1050cc's went in and it had no issues before those two things.
Of course, the cams + injectors could compound the problem.
I too agree the stalling is probably more from the pipe then the injectors, but the injectors sure made it a larger problem.
As far as the startup, I just can't get the thing to startup clean, even after scaling the MAF.
I had this same thing on another evo with FIC injectors, they weren't 1050cc's, 880's or something like that. Stock induction pipe, stock cams, etc.
Personally I prefer the RC and Denso injectors over any of the rochester type units, too bad they both only come in 720/750 and 1000cc sizes and nothing in between.
#28
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I have the FIC 1050s and I have the exact same startup issues. It will crank fine in the mornning, but after that, it's a good ~3 sec to start it up. I had already checked for leaks and the likes, and never found any.
It took me a long, long time to get them scaled because I was chasing my tail on some boost leak issues. It seems like even the smallest leak with these will throw the trims way off.
Anyways, I ended up with the latencys that Mr.Fred posted previously in his test but I ended up scaling mine to 1218 I'm sitting at 0% Low trim after 10 min idle with no A/C and -2% to -4% on the mid. after a good crusie. This is with no measurable boost leaks. Once warmed it drives very, very smooth. I'm kind of curious as to why I ended up with scaling so high when the average for these injectors seems to be between 860 and 1083. The only other change in the fuel system is a Wabro 255, which I'd imagine most other people with these injectors have.
Any thoughts?
It took me a long, long time to get them scaled because I was chasing my tail on some boost leak issues. It seems like even the smallest leak with these will throw the trims way off.
Anyways, I ended up with the latencys that Mr.Fred posted previously in his test but I ended up scaling mine to 1218 I'm sitting at 0% Low trim after 10 min idle with no A/C and -2% to -4% on the mid. after a good crusie. This is with no measurable boost leaks. Once warmed it drives very, very smooth. I'm kind of curious as to why I ended up with scaling so high when the average for these injectors seems to be between 860 and 1083. The only other change in the fuel system is a Wabro 255, which I'd imagine most other people with these injectors have.
Any thoughts?
#29
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I had this same thing on another evo with FIC injectors, they weren't 1050cc's, 880's or something like that. Stock induction pipe, stock cams, etc.
Personally I prefer the RC and Denso injectors over any of the rochester type units, too bad they both only come in 720/750 and 1000cc sizes and nothing in between.
#30
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It took me a long, long time to get them scaled because I was chasing my tail on some boost leak issues. It seems like even the smallest leak with these will throw the trims way off.
Anyways, I ended up with the latencys that Mr.Fred posted previously in his test but I ended up scaling mine to 1218
Any thoughts?
Anyways, I ended up with the latencys that Mr.Fred posted previously in his test but I ended up scaling mine to 1218
Any thoughts?
For example, you could probably scale back down to the 900 range, adding about 25% more fuel. To take out that 25% fuel at idle, assuming a 1.5ms IPW, you would have to take out about .370 from your latencies. That would still leave your Mid trims somewhat positive though, depending on what your IPW is at cruising. If you kept taking out latency, you would then end up with a more positive idle than cruise trim, indicating some sort of unmetered air getting in or maf scaling issue, like I mentioned above.
Either way, though, while that high of a scaling may be 'wrong', if it is working for your setup and you have adjusted your open loop maps to compensate, then leaving it shouldn't hurt anything. In my opinion, though, I would want to figure out what it causing that and use a more 'normal' scaling.
Eric