Tuning PE 660s : How & Why?

downshift1 · 07-28-2003, 04:26 PM

After hearing Nathan and Clark's discussion on another thread on ths, I would like to hear everybody's input and comments on how to do it, how hard it is and if there is a better way. Also any comments on the 800cc's?

Thanks!

Dylan

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RiftsWRX · 07-28-2003, 06:16 PM

Pay very careful attention to your tps cross over %.

Getting them somewhat right is easy enough.. but since you go into open loop at either 69%+ TPS, or > 3900 RPM, either one of those conditions will trigger different fueling.

If your still in the 0% column it'll affect drivability... if your in the 10% column (using different fuel values) and still in open loop, then you can all of the sudden dump in fuel (due to the mass MAF voltage change), and you run the risk of partial throttle, low throttle misfires.

whenever you make a fuel change.... don't even bother gauging if it's done it's thing until you've put the car through it's paces a few times.

Whatelse... oh yeah, they're a labor of love, and if you go too nutty on the bottom end you'll have the occasional time where it won't start on a crank for like 10 seconds....

anything else? yeah... they weren't worth my time to tune...

Peace,
Jorge (RiftsWRX)
www.ProjectWRX.com

dman918 · 07-28-2003, 07:54 PM

Bah. You know you love those injectors, Jorge.

Tuning Factory Inc. · 07-29-2003, 12:55 AM

It's not so bad. I've tuned many. IT takes some time to street tune it is all. Dropping the % in the 10 column to 30% instead of 60% would work better but would take time to do properly. At 38-60% throttle you don't go into the 10% column but often get significant amount of boost which triggers lean conditions. You can just add fuel at 10% but it may run a bit rich at part throttle. E-mail me if you need more help. I have those in stock BTW.

BLUETURBOWRX · 07-29-2003, 03:03 AM

HEY GOD, How long does it take you around to tune these injectors. Also this may be a stupid question but are the PE800cc injectors any easier to tune??? thanks,eric

Cacophony · 07-29-2003, 10:37 AM

800cc's easier to tune? Hah!

Notice how much the fuel has to be adjusted to get the 660's to run? It will only be worse when you have bigger injectors and more fuel.

No problems with the 660's in my car.. Motec loves them.

downshift1 · 07-29-2003, 02:58 PM

So the only problem with the injectors is trying to tune the UTEC around them...

Looks like that nails it, GEMS here I come.

-Dylan

0db · 07-29-2003, 03:05 PM

Quote:

Originally posted by downshift1
So the only problem with the injectors is trying to tune the UTEC around them...

Looks like that nails it, GEMS here I come.

Open loop fueling the whole map is so much easier anyway.

Redline8k · 07-29-2003, 03:08 PM

Lets not drop this subject. This is the LAST thing hanging in the balance for me to finish my car. Im looking at either the UR low impedance 785cc or the PE 800cc I have a utec and a JDM ra c ecu... I have no problem flashing my ecu to "make" it work with the PE... any more help would be great...I know where most of the local guys stand on this, so looking for some outside views too.
thanks
-nick

BLUETURBOWRX · 07-29-2003, 03:19 PM

Hey nick, did u call turbo XS to find out if the 785's are decent injectors or no. I would like to know what they said if you talked to them.
Yes please dont drop this subject, i need bigger injectors for my set up and dont know what to do. Keep replying to this post cuz im very interested. thanks,eric

Redline8k · 07-29-2003, 03:30 PM

no I havent, but its not about if the injectors are decent or not more like if the utec will drive the low impedance or not...and work well with my setup...
-nick
I should have time to call them today...

BLUETURBOWRX · 07-29-2003, 04:14 PM

Sounds good nick, give me a call if you get a chance and let me know what they think about those injectors. thanks,eric

downshift1 · 07-30-2003, 01:36 PM

Bump!

Nathan?

Clark?

-Dylan

07-28-2003, 04:26 PM	#1
downshift1 Scooby Specialist Member#: 15607 Join Date: Feb 2002 Chapter/Region: MWSOC Location: W.Chicago, IL Vehicle: 1996 Impreza WRX Wagon - It's JDM Yo!	Tuning PE 660s : How & Why? After hearing Nathan and Clark's discussion on another thread on ths, I would like to hear everybody's input and comments on how to do it, how hard it is and if there is a better way. Also any comments on the 800cc's? Thanks! Dylan * Registered users of the site do not see these ads.

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07-28-2003, 06:16 PM	#2
RiftsWRX Scooby Guru Member#: 6124 Join Date: Apr 2001 Chapter/Region: MWSOC Location: Glendale Hts, IL, USA Vehicle: 2000 NFR AP1 S2000 '07 Honda FIT sport (5MT)	Pay very careful attention to your tps cross over %. Getting them somewhat right is easy enough.. but since you go into open loop at either 69%+ TPS, or > 3900 RPM, either one of those conditions will trigger different fueling. If your still in the 0% column it'll affect drivability... if your in the 10% column (using different fuel values) and still in open loop, then you can all of the sudden dump in fuel (due to the mass MAF voltage change), and you run the risk of partial throttle, low throttle misfires. whenever you make a fuel change.... don't even bother gauging if it's done it's thing until you've put the car through it's paces a few times. Whatelse... oh yeah, they're a labor of love, and if you go too nutty on the bottom end you'll have the occasional time where it won't start on a crank for like 10 seconds.... anything else? yeah... they weren't worth my time to tune... Peace, Jorge (RiftsWRX) www.ProjectWRX.com

07-28-2003, 07:54 PM	#3
dman918 Scooby Specialist Member#: 11202 Join Date: Oct 2001 Chapter/Region: MWSOC Location: McHenry, IL-no mo Madison Vehicle: 2006 STI w/ stuff WRB	Bah. You know you love those injectors, Jorge.

07-29-2003, 12:55 AM	#4
Tuning Factory Inc. Vendor Member#: 3600 Join Date: Jan 2001 Location: Detroit, Michigan, USA	It's not so bad. I've tuned many. IT takes some time to street tune it is all. Dropping the % in the 10 column to 30% instead of 60% would work better but would take time to do properly. At 38-60% throttle you don't go into the 10% column but often get significant amount of boost which triggers lean conditions. You can just add fuel at 10% but it may run a bit rich at part throttle. E-mail me if you need more help. I have those in stock BTW.

07-29-2003, 03:03 AM	#5
BLUETURBOWRX Scooby Specialist Member#: 22968 Join Date: Aug 2002 Location: IL Vehicle: EVO WRX Parted Out- Axis 2.35L,6-speed,ect	HEY GOD, How long does it take you around to tune these injectors. Also this may be a stupid question but are the PE800cc injectors any easier to tune??? thanks,eric

07-29-2003, 10:37 AM	#6
Cacophony Scooby Newbie Member#: 213 Join Date: Aug 1999 Location: Philly, PA Vehicle: 2004 Mazda RX-8 Black	800cc's easier to tune? Hah! Notice how much the fuel has to be adjusted to get the 660's to run? It will only be worse when you have bigger injectors and more fuel. No problems with the 660's in my car.. Motec loves them.

07-29-2003, 02:58 PM	#7
downshift1 Scooby Specialist Member#: 15607 Join Date: Feb 2002 Chapter/Region: MWSOC Location: W.Chicago, IL Vehicle: 1996 Impreza WRX Wagon - It's JDM Yo!	So the only problem with the injectors is trying to tune the UTEC around them... Looks like that nails it, GEMS here I come. -Dylan

07-29-2003, 03:08 PM	#9
Redline8k Scooby Specialist Member#: 2968 Join Date: Nov 2000 Chapter/Region: MWSOC Location: Elgin,Illinois Vehicle: Beat it to fit, Paint it to match!	Lets not drop this subject. This is the LAST thing hanging in the balance for me to finish my car. Im looking at either the UR low impedance 785cc or the PE 800cc I have a utec and a JDM ra c ecu... I have no problem flashing my ecu to "make" it work with the PE... any more help would be great...I know where most of the local guys stand on this, so looking for some outside views too. thanks -nick

07-29-2003, 03:19 PM	#10
BLUETURBOWRX Scooby Specialist Member#: 22968 Join Date: Aug 2002 Location: IL Vehicle: EVO WRX Parted Out- Axis 2.35L,6-speed,ect	Hey nick, did u call turbo XS to find out if the 785's are decent injectors or no. I would like to know what they said if you talked to them. Yes please dont drop this subject, i need bigger injectors for my set up and dont know what to do. Keep replying to this post cuz im very interested. thanks,eric

07-29-2003, 03:30 PM	#11
Redline8k Scooby Specialist Member#: 2968 Join Date: Nov 2000 Chapter/Region: MWSOC Location: Elgin,Illinois Vehicle: Beat it to fit, Paint it to match!	no I havent, but its not about if the injectors are decent or not more like if the utec will drive the low impedance or not...and work well with my setup... -nick I should have time to call them today...

07-29-2003, 04:14 PM	#12
BLUETURBOWRX Scooby Specialist Member#: 22968 Join Date: Aug 2002 Location: IL Vehicle: EVO WRX Parted Out- Axis 2.35L,6-speed,ect	Sounds good nick, give me a call if you get a chance and let me know what they think about those injectors. thanks,eric

07-30-2003, 01:36 PM	#13
downshift1 Scooby Specialist Member#: 15607 Join Date: Feb 2002 Chapter/Region: MWSOC Location: W.Chicago, IL Vehicle: 1996 Impreza WRX Wagon - It's JDM Yo!	Bump! Nathan? Clark? -Dylan