I would like some advice before I do as the title says but my concern is that after installing the larger fuel injectors for my soon-to-be turbo, would it be a problem if I started my engine now? I of course dont have the turbo yet as im still trying to figure out which one I would like but I put her all back together today and REALLY want to see how she sounds with new cams and such. I installed some 660cc fuel injectors and I also have my AFPR to install if its necessary now? I really would like to know what you guys think before I attempt to see if she starts, thanks ahead of time.
#131292, "RE: I wanna start my engine........." In response to Reply # 0 Aug-06-10 07:58 PM by TurbchargdSpydr
Someone will correct me if im wrong lol, but you shouldn't run the car with such high injectors, your idle will suck so bad, im not sure if there is a chance that you ruin something inside the motor but if you wanted to see it start just to make sure it runs, put the stock injectors until you get the turbo...
Edit - If you want to run the AFPR safely i think maximum size injectors is like 270cc and thats with a turbo...so...
#131298, "RE: I wanna start my engine........." In response to Reply # 1
Well I figured I would give it a day or so for some responces but that didnt work out to well(with the exception of one)and thanks by the way. I guess ill be putting the stock ones back on for now just really not looking forward to uninstalling the fuel rail, oh well...thanks agian for the input man
#131299, "RE: I wanna start my engine........." In response to Reply # 2
I agree with the above. If you are simply looking to start the motor and let her idle, I would definitely go with the stockers. Trying to get the car to idle properly with a set of 600cc injectors, and no management system, will be nearly impossible. With injectors that big, your idle fuel pressure would have to be so low that the spray patterns on the injectors would be pure garbage.
1999 Eclipse GS Built motor Hahn 16G Turbo w/ FMIC Hahn Stage 5 Portfueler (270's & 500's) Zeitronix Zt-2 wideband w/ 3.5bar MAP 3" SS Turbo Back CM Stage 4 Clutch and Fidanza Flywheel Baer Big Brake Kit
#131301, "RE: I wanna start my engine........." In response to Reply # 3
Originally posted by Ebster1085 I agree with the above. If you are simply looking to start the motor and let her idle, I would definitely go with the stockers. Trying to get the car to idle properly with a set of 600cc injectors, and no management system, will be nearly impossible. With injectors that big, your idle fuel pressure would have to be so low that the spray patterns on the injectors would be pure garbage.
Well after a couple of hours under the hood I swapped out the injectors and now just letting the battery charge before I try turning her over for the first time in about a year Anyways, I was thinking about leaving them installed and then installing the AFPR that I just purchased, would that not help me keep a decent idle or does it have to run with a complete turbo setup in order for it to work properly?
#131304, "RE: I wanna start my engine........." In response to Reply # 4
Even with the AFPR you'd have to drop the idle psi so low that those big injectors would be dribbling the fuel out instead of misting it like they're supposed to. The engine would run like ASS until you were in the upper RPM range
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#131306, "RE: I wanna start my engine........." In response to Reply # 5
Sounds good sir, I guess I made the right choice and just swapped them out. Thats great, guess ill have them laying around until I have the turbo to install them with;-(
#131307, "RE: I wanna start my engine........." In response to Reply # 6
So what are you planning on running for engine management with the turbo and the large injectors? Idling now versus with a turbo will not likely create huge injector pulse width differences.
So your problem of idling with the large injectors now will still exist when you bolt that turbo on unless you have some form of injector control to dial back the pulse width.
#131315, "RE: I wanna start my engine........." In response to Reply # 7
Exactly, you MUST have at LEAST an s-afc to dial back the injector pulse width so it will idle. I just installed a set of 1000cc injectors last night and I had to lower my fuel pressure to around 35psi at idle and use MSnS to cut back on the pulse width to get around a 13.3:1 idle and my VE buckets in MS is around 10 or so. So as already stated you MUST have some way to control those big injectors and honestly I don't think you can do that big of an injector on an S-AFC, I think you would still be rich even after lowering fuel pressure.
#131323, "RE: I wanna start my engine........." In response to Reply # 8 Aug-09-10 01:44 PM by CandiPaint2G
Originally posted by Slo2g Exactly, you MUST have at LEAST an s-afc to dial back the injector pulse width so it will idle. I just installed a set of 1000cc injectors last night and I had to lower my fuel pressure to around 35psi at idle and use MSnS to cut back on the pulse width to get around a 13.3:1 idle and my VE buckets in MS is around 10 or so. So as already stated you MUST have some way to control those big injectors and honestly I don't think you can do that big of an injector on an S-AFC, I think you would still be rich even after lowering fuel pressure.
I really appreciate the input fellas, and yes sir I was planning on purchasing my MS just as soon as I figured out what setup I was going to utilize. Well I installed a new battery and no luck. Engine does not turn over but only makes a click sound when I turn the key so im really bummed out right now. Any ideas??? I do notice my alarm is NOT sounding off like usual when I connected the new battery so im in the process of checking with Clifford to see how to bypass the alarm in order to rull that out if its somehow had the kill swith engaged or something.......
Anyways, I was thinking about leaving them installed and then installing the AFPR that I just purchased, would that not help me keep a decent idle or does it have to run with a complete turbo setup in order for it to work properly?
