JR SC Fuel Management?

ray_sir_6 · 07-21-2007, 10:59 PM

OK, I am curious what comes with this kit for the 1.6 to manage fuel demands? I have a Greddy Kit and have the JR Injector Controller with MSD timing box from the "big boost" SC Kit. What comes on the base kit? I have an O2 clamp and running the 10:1 Vortech disc, and looking to tune it, but trying to see the similarity between the two systems to determine where to start. I currently am runing approx 8psi, but PIG RICH!! Like >10:1 under boost.

Thanks

PYTHON · 07-21-2007, 11:10 PM

well if you got some money i would check out SDS EFI

http://sdsefi.com/

ray_sir_6 · 07-21-2007, 11:20 PM

I don't need to know what people recommend, I need to know the JR fuel management they use for the SC kits. Do they have a FPR, or another type of electronic controller? I want to know because I have a Begi and put it on, and tuned it the lowest gain rate and still ran too rich. Can I run it without a FPR, and just use the injector controller and MSD box? Is the Begi busted? I am gonna do Haltech, but just looking for a simple way to run 11:1 A/F till I do the standalone. I work at Alamo Autosports, so I can get it at a great price, so I just need a better "tune" till I get it in the month or so.

PYTHON · 07-21-2007, 11:24 PM

ahhh sorry about that....

i dont know

Greg G · 07-21-2007, 11:26 PM

Let's see... I have a Mazdaspeed (JRSC) with the original big boost kit. The stock SC setup had just the AFPR. The Big Boost Kit came with the crank pulley, a Walbro 255 pump, and the JR fueling "Black box". I believe the current BBKs come with the Moss fuel card thingie (injector controller).

ray_sir_6 · 07-21-2007, 11:31 PM

Ok, so it came with an AFPR. Thanks.

phinz · 07-22-2007, 07:56 AM

Yes, it did. My '96 a/c and ps came with an AFPR in '01 when I ordered it.

Sharky · 07-22-2007, 06:30 PM

Yeah, mine too, it came with the AFPR.

Braineack · 07-27-2007, 09:53 AM

I thought they came with the powercoard now.

924_nick · 08-02-2007, 04:42 PM

Yeah, it sounds to me like you're running two types of fuel enrichment, which is why you're too rich. I would ditch the black box JR fuel enrichment which is a cheep hack and tune just with the Begi.

ray_sir_6 · 08-02-2007, 06:34 PM

I am running both so I don't have to run 140psi fuel pressure on the stock injectors @ 9psi. I was asking cause I want to install the Begi or goto the 8:1, 6:1, 4:1 discs. I just wanted to make sure that I actually needed the AFPR before I went to lower ratios. Now that I know the AFPR was used in conjunction with the JRIC, I am gonna tune it accordingly.

Braineack · 08-03-2007, 08:17 AM

if you're running greater than 10:1 AFR with both devices...wouldn't it be safe to say you dont need both to support your output?

ray_sir_6 · 08-04-2007, 05:25 PM

Quote:

Originally Posted by Braineack @ Fri 03 Aug, 07:17

if you're running greater than 10:1 AFR with both devices...wouldn't it be safe to say you dont need both to support your output?

I am still running the stock injectors, so I am running high fuel pressures, and I am looking to drop them down to something closer to 80-90psi.

Braineack · 08-06-2007, 08:54 AM

that's fine. but the FMU alone should be plenty.

as is, you're dumping in more fuel mechincally, the more fuel pressure = the greater HP supported. At the same time you're adjusting the electrical side of things and telling the ECU to dump in more fuel by adjusting pulse widths and whatnot.

what are you fuel pressures in boost currently?

At 8-9psi a typical greddy kit will be pumping out close to 170rwhp. with 230cc injectors, 100psi of fuel alone could support that power, without any additional devices to fust around with things.

If you want to lower you fuel pressure, simple get 1.8L injectors, the correct disc for you vortech, and remove the JR fueling device. Or pull the FMU altogether and work with just the JR device, however, I doubt it will be the superior of the two choices.

fwiw, I was running 200rwhp for the longest time with just a vortech fmu and slightly larger injectors.

ray_sir_6 · 08-07-2007, 09:21 PM

Quote:

Originally Posted by Braineack @ Mon 06 Aug, 07:54

that's fine. but the FMU alone should be plenty.

as is, you're dumping in more fuel mechincally, the more fuel pressure = the greater HP supported. At the same time you're adjusting the electrical side of things and telling the ECU to dump in more fuel by adjusting pulse widths and whatnot.

what are you fuel pressures in boost currently?

At 8-9psi a typical greddy kit will be pumping out close to 170rwhp. with 230cc injectors, 100psi of fuel alone could support that power, without any additional devices to fust around with things.

If you want to lower you fuel pressure, simple get 1.8L injectors, the correct disc for you vortech, and remove the JR fueling device. Or pull the FMU altogether and work with just the JR device, however, I doubt it will be the superior of the two choices.

fwiw, I was running 200rwhp for the longest time with just a vortech fmu and slightly larger injectors.

Well, I wanted to use the the Begi to cut down on the fuel pressure and let the JR deal with the extra demand. I don't have a fuel pressure gauge, or the Begi would be on and tuned. I put all these plans on hold, and will probably be pulling all this stuff out and running a Haltech E6 or E8 and bigger injectors (550 if E6, 1000 if E8 due to better injector controls).

Braineack · 08-08-2007, 02:45 PM

Haltech or bandaids, let's weigh the options

get the 550s and call it a day...do you really need support for 700BHP?

ray_sir_6 · 08-08-2007, 07:46 PM

Never hurt to be over-prepared. Maybe I'll build it for 400+whp later on, doubt it, but the injectors are the same price regardless of size, so go big and never buy again.

Braineack · 08-09-2007, 10:03 AM

on a 1.6L?

the 550s should be enough for close to 400hp.

ray_sir_6 · 08-10-2007, 07:42 PM

Quote:

Originally Posted by Braineack @ Thu 09 Aug, 09:03

on a 1.6L?

the 550s should be enough for close to 400hp.

It was actually a joke, I have 460s in the garage waiting to go in.

07-21-2007, 10:59 PM	#1 (permalink)
ray_sir_6 Member Join Date: Mar 2007 Location: DFW, TX Posts: 435	JR SC Fuel Management? OK, I am curious what comes with this kit for the 1.6 to manage fuel demands? I have a Greddy Kit and have the JR Injector Controller with MSD timing box from the "big boost" SC Kit. What comes on the base kit? I have an O2 clamp and running the 10:1 Vortech disc, and looking to tune it, but trying to see the similarity between the two systems to determine where to start. I currently am runing approx 8psi, but PIG RICH!! Like >10:1 under boost. Thanks
	__________________ 91 Miata 1.6l Greddy Turbo AEM EMS 17psi 280whp@6200rpm/265tq@4400rpm, 2450lbs

07-21-2007, 11:20 PM	#3 (permalink)
ray_sir_6 Member Join Date: Mar 2007 Location: DFW, TX Posts: 435	Re: JR SC Fuel Management? I don't need to know what people recommend, I need to know the JR fuel management they use for the SC kits. Do they have a FPR, or another type of electronic controller? I want to know because I have a Begi and put it on, and tuned it the lowest gain rate and still ran too rich. Can I run it without a FPR, and just use the injector controller and MSD box? Is the Begi busted? I am gonna do Haltech, but just looking for a simple way to run 11:1 A/F till I do the standalone. I work at Alamo Autosports, so I can get it at a great price, so I just need a better "tune" till I get it in the month or so.
	__________________ 91 Miata 1.6l Greddy Turbo AEM EMS 17psi 280whp@6200rpm/265tq@4400rpm, 2450lbs

07-21-2007, 11:26 PM	#5 (permalink)
Greg G Moderator Join Date: Apr 2006 Location: Manila Posts: 3,543	Let's see... I have a Mazdaspeed (JRSC) with the original big boost kit. The stock SC setup had just the AFPR. The Big Boost Kit came with the crank pulley, a Walbro 255 pump, and the JR fueling "Black box". I believe the current BBKs come with the Moss fuel card thingie (injector controller).
	__________________ Goodbye, ARC. Thanks for the awesomeness.

07-21-2007, 11:31 PM	#6 (permalink)
ray_sir_6 Member Join Date: Mar 2007 Location: DFW, TX Posts: 435	Re: JR SC Fuel Management? Ok, so it came with an AFPR. Thanks.
	__________________ 91 Miata 1.6l Greddy Turbo AEM EMS 17psi 280whp@6200rpm/265tq@4400rpm, 2450lbs

07-22-2007, 06:30 PM	#8 (permalink)
Sharky Member Join Date: Mar 2007 Location: Guam USA Posts: 206	Re: JR SC Fuel Management? Yeah, mine too, it came with the AFPR.
	__________________ www.dragguam.com

07-21-2007, 11:10 PM	#2 (permalink)
PYTHON Brah. Join Date: May 2006 Location: Birmingham AL Posts: 7,478	well if you got some money i would check out SDS EFI http://sdsefi.com/

07-21-2007, 11:24 PM	#4 (permalink)
PYTHON Brah. Join Date: May 2006 Location: Birmingham AL Posts: 7,478	ahhh sorry about that.... i dont know

07-22-2007, 07:56 AM	#7 (permalink)
phinz Member Join Date: Jun 2006 Location: Somewhere between the Port of Indecision and Margaritaville, Southeast of Disorder Posts: 1,016	Yes, it did. My '96 a/c and ps came with an AFPR in '01 when I ordered it.

07-27-2007, 09:53 AM	#9 (permalink)
Braineack Banned Join Date: Aug 2006 Location: a Posts: 4,094	I thought they came with the powercoard now.

08-02-2007, 04:42 PM	#10 (permalink)
924_nick Noob Join Date: Jul 2007 Posts: 4	Re: JR SC Fuel Management? Yeah, it sounds to me like you're running two types of fuel enrichment, which is why you're too rich. I would ditch the black box JR fuel enrichment which is a cheep hack and tune just with the Begi.
924_nick Noob Join Date: Jul 2007 Posts: 4

08-02-2007, 06:34 PM	#11 (permalink)
ray_sir_6 Member Join Date: Mar 2007 Location: DFW, TX Posts: 435	Re: JR SC Fuel Management? I am running both so I don't have to run 140psi fuel pressure on the stock injectors @ 9psi. I was asking cause I want to install the Begi or goto the 8:1, 6:1, 4:1 discs. I just wanted to make sure that I actually needed the AFPR before I went to lower ratios. Now that I know the AFPR was used in conjunction with the JRIC, I am gonna tune it accordingly.
	__________________ 91 Miata 1.6l Greddy Turbo AEM EMS 17psi 280whp@6200rpm/265tq@4400rpm, 2450lbs

08-03-2007, 08:17 AM	#12 (permalink)
Braineack Banned Join Date: Aug 2006 Location: a Posts: 4,094	if you're running greater than 10:1 AFR with both devices...wouldn't it be safe to say you dont need both to support your output?

08-06-2007, 08:54 AM	#14 (permalink)
Braineack Banned Join Date: Aug 2006 Location: a Posts: 4,094	that's fine. but the FMU alone should be plenty. as is, you're dumping in more fuel mechincally, the more fuel pressure = the greater HP supported. At the same time you're adjusting the electrical side of things and telling the ECU to dump in more fuel by adjusting pulse widths and whatnot. what are you fuel pressures in boost currently? At 8-9psi a typical greddy kit will be pumping out close to 170rwhp. with 230cc injectors, 100psi of fuel alone could support that power, without any additional devices to fust around with things. If you want to lower you fuel pressure, simple get 1.8L injectors, the correct disc for you vortech, and remove the JR fueling device. Or pull the FMU altogether and work with just the JR device, however, I doubt it will be the superior of the two choices. fwiw, I was running 200rwhp for the longest time with just a vortech fmu and slightly larger injectors.

08-08-2007, 02:45 PM	#16 (permalink)
Braineack Banned Join Date: Aug 2006 Location: a Posts: 4,094	Haltech or bandaids, let's weigh the options get the 550s and call it a day...do you really need support for 700BHP?

08-08-2007, 07:46 PM	#17 (permalink)
ray_sir_6 Member Join Date: Mar 2007 Location: DFW, TX Posts: 435	Re: JR SC Fuel Management? Never hurt to be over-prepared. Maybe I'll build it for 400+whp later on, doubt it, but the injectors are the same price regardless of size, so go big and never buy again.
	__________________ 91 Miata 1.6l Greddy Turbo AEM EMS 17psi 280whp@6200rpm/265tq@4400rpm, 2450lbs

08-09-2007, 10:03 AM	#18 (permalink)
Braineack Banned Join Date: Aug 2006 Location: a Posts: 4,094	on a 1.6L? the 550s should be enough for close to 400hp.

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