can you run 1000cc injectors with the power fc?

[frankenfresh]

after speaking to a local tunner, i was told that the sr20det power fc can not run 1000cc injectors. is this true? what is the largest injector you can run with the power fc?

[titangts]

lol i dont see why not..its a freaking full standalone. ask steve shadows at shadowerks.com

hes on here alot. PFC certified..he'll know

[slider2828]

Yes, but I wouldn't..... Its not the best ecu to run huge injectors like that.... Haltech or AEM or something along those lines are definitely better....

[s14sport]

Originally Posted by slider2828

Yes, but I wouldn't..... Its not the best ecu to run huge injectors like that.... Haltech or AEM or something along those lines are definitely better....

+1 agreed. My boy is running 860cc injectors on the PFC and is having a hard time with those...

[DALAZ_68]

PFC has a limit on Inj sizingfor proper tuning?! first tim ei hear about this...

[GroundPerformance]

Injector driver???

[jspaeth]

Originally Posted by frankenfresh

after speaking to a local tunner, i was told that the sr20det power fc can not run 1000cc injectors. is this true? what is the largest injector you can run with the power fc?

I don't see why you couldn't TECHNICALLY do it.

My buddy is running 1000 cc ID injectors on an RB26 (stock 440s) with a PowerFC, so it CAN work.

The hardest part of using big injectors like that, especially with a small displacement 4 cylinder is getting the idle and lower part of the map worked out, because usually, the lag time is of the same order of magnitude or more than the time the injector needs to be open to achieve proper air/fuel ratio.

another way of putting it is "it's hard to keep the injectors open for a SHORT enough period of time to prevent from running rich"

This is mostly true in the very low RPM, very high vacuum (low load) portion of the map only

[slider2828]

LIke I said yes you can run PFC's.... but as jspaeth said, lower portion of the map is basically crap.... and idle will be crap....

[frankenfresh]

I've already gone to top feed, and am looking for around 450 to 500 whp, so suggested injector size would be what? 740cc?

[dorkidori_s13]

lol...of course you can run 1000cc injectors with a powerFC

i was running 1200cc MSD top feeds in mine without a problem

whoever told you that is full of crap

and for the horsepower numbers you are shooting for...run 1000cc minimum with a GOOD FPR (not some junk NISMO FPR)...taking load off the injectors by adding more fuel pressure helps ALOT...the more room you have to play with your injectors when tuning the better

and btw...you can have a VERY solid and comfortable idle with huge injectors...if you know what youre doing with tuning, you can adjust for a steady idle very easily (never had ANY idle issues with my injectors/tune after i got rid of my crap deatchworks injectors and went with the MSDs...MSDs tuned like a dream)

[steve shadows]

Originally Posted by frankenfresh

after speaking to a local tunner, i was told that the sr20det power fc can not run 1000cc injectors. is this true? what is the largest injector you can run with the power fc?

The lag time control is ok to help scale the injector over it's entire operating range and you can adjust the hertz.It depends on tuning though and the quality of the injector.I dont suggest running larger than a 850 CC injector with the Power FC.

The more advanced standalones like the Haltech P1000 and P2000, the AEM EMS allow a lot more adjustment to the dead time, injector impedence selection and type of injector scaling and flow you are working with.

The PFCs even with all the right calibrations just never purr quite as well with the larger fuel injectors. Also don't use low impedence fuel injectors with the PFC. I suggest using only High Impedence direct drop in denso style fuel injectors for a street car.

It has a lot to do with VE also (Volumetric Effeciency) in my practical experience. The cars with more VE or larger tend to be able to runt he larger fuel injectors off the PFC without needing the more detailed injector mapping functions found on more advanced ems. However there are little things you notice like slight sputtering at idle or high idle condition even with IACV and prime map enabled and configured.

Good luck either way. I would go with a more precise unit if you are getting that serious.

You can get the PFC to run just about anything without having those very detailed dead time mapping controls and injector calibration tables for VE but the places you will see differences are in your low throttle tractive effort AFR response and possibly idle.

[s14sport]

Originally Posted by jspaeth

I don't see why you couldn't TECHNICALLY do it.

My buddy is running 1000 cc ID injectors on an RB26 (stock 440s) with a PowerFC, so it CAN work.

The hardest part of using big injectors like that, especially with a small displacement 4 cylinder is getting the idle and lower part of the map worked out, because usually, the lag time is of the same order of magnitude or more than the time the injector needs to be open to achieve proper air/fuel ratio.

another way of putting it is "it's hard to keep the injectors open for a SHORT enough period of time to prevent from running rich"

This is mostly true in the very low RPM, very high vacuum (low load) portion of the map only

absolutely...technically you can run the large injectors with the PFC. But, getting it to not idle so rich, specifically on cold start, is very hard.

[frankenfresh]

Originally Posted by steve shadows

The lag time control is ok to help scale the injector over it's entire operating range and you can adjust the hertz.It depends on tuning though and the quality of the injector.I dont suggest running larger than a 850 CC injector with the Power FC.

The more advanced standalones like the Haltech P1000 and P2000, the AEM EMS allow a lot more adjustment to the dead time, injector impedence selection and type of injector scaling and flow you are working with.

The PFCs even with all the right calibrations just never purr quite as well with the larger fuel injectors. Also don't use low impedence fuel injectors with the PFC. I suggest using only High Impedence direct drop in denso style fuel injectors for a street car.

It has a lot to do with VE also (Volumetric Effeciency) in my practical experience. The cars with more VE or larger tend to be able to runt he larger fuel injectors off the PFC without needing the more detailed injector mapping functions found on more advanced ems. However there are little things you notice like slight sputtering at idle or high idle condition even with IACV and prime map enabled and configured.

Good luck either way. I would go with a more precise unit if you are getting that serious.

You can get the PFC to run just about anything without having those very detailed dead time mapping controls and injector calibration tables for VE but the places you will see differences are in your low throttle tractive effort AFR response and possibly idle.

hey steve. i spoke to you along time ago about doing a remote tune for my car and power fc. my set up was a lot different back then and i never got it running. I have since gone a much different route. i recently just told my friend ryan here in alberta about you and your services and you sent him a tune which worked out pretty well. well i was just about to contact you for a remote tune for my set up. i have already gone to top feed low impendence injectors with a resistor box, and would like to stick with that set up. i don't mind a rough or high idle. should i stick with my 1000's or get some 850's?

[Hxc_Nismo]

i run 1000cc injectors on my pfc d-jetro but its an rb26, why are you needing 1000cc injectors on your sr20? how much power are you trying to get out of it?

[frankenfresh]

Originally Posted by Hxc_Nismo

i run 1000cc injectors on my pfc d-jetro but its an rb26, why are you needing 1000cc injectors on your sr20? how much power are you trying to get out of it?

450-500whp on high boost setting and somewhere in the 350whp range on low boost.

and i am running a z32 maf not a map sensor

[brndck]

ugh for those hp numbers 1000 cc is way way overkill
good tuning (like the aforementioned steve shadows) should be able to put you in those numbers with far smaller injectors (740cc) and good tuning.
550cc should be able to handle 350 whp.
a z32 maf maxes out at around 500 iirc?

[RACETUNE]

Originally Posted by frankenfresh

after speaking to a local tunner, i was told that the sr20det power fc can not run 1000cc injectors. is this true? what is the largest injector you can run with the power fc?

you can run any size injector you want to run.

[bl3ujay07]

i wouldnt trust 550cc for 350, let alone 300 hp. I had 550's and was pushing high 90%. Swapped to 850's and dynoed it at 315 hp. On the 850's, i beleive i hit somewhere like 40-50% (car have been sold llike 5 months ago).

[frankenfresh]

Originally Posted by bl3ujay07

i wouldnt trust 550cc for 350, let alone 300 hp. I had 550's and was pushing high 90%. Swapped to 850's and dynoed it at 315 hp. On the 850's, i beleive i hit somewhere like 40-50% (car have been sold llike 5 months ago).

this is why i originaly went with 1000cc. I wanted to run them at less then 90% duty cycle at around 500hp

[drag113]

Originally Posted by steve shadows

The lag time control is ok to help scale the injector over it's entire operating range and you can adjust the hertz.It depends on tuning though and the quality of the injector.I dont suggest running larger than a 850 CC injector with the Power FC.

The more advanced standalones like the Haltech P1000 and P2000, the AEM EMS allow a lot more adjustment to the dead time, injector impedence selection and type of injector scaling and flow you are working with.

The PFCs even with all the right calibrations just never purr quite as well with the larger fuel injectors. Also don't use low impedence fuel injectors with the PFC. I suggest using only High Impedence direct drop in denso style fuel injectors for a street car.

It has a lot to do with VE also (Volumetric Effeciency) in my practical experience. The cars with more VE or larger tend to be able to runt he larger fuel injectors off the PFC without needing the more detailed injector mapping functions found on more advanced ems. However there are little things you notice like slight sputtering at idle or high idle condition even with IACV and prime map enabled and configured.

Good luck either way. I would go with a more precise unit if you are getting that serious.

You can get the PFC to run just about anything without having those very detailed dead time mapping controls and injector calibration tables for VE but the places you will see differences are in your low throttle tractive effort AFR response and possibly idle.

where would deatshwerks fall into that category? my car idles decent and star is always hard when engine is cold or hot. when it idles i see black soot come out of my exhaust so im thinking the fuel is choking off the motor at start up.