Dual FPDM Question

Willy Mo · February 10th, 2011, 04:56 PM

I have a second FPDM and a 40amp BAP laying aroundm bc i havent needed them with the cobra setup. But I was wondering if I wire in teh second FPDM and do the wireing upgrade if it will help me out any right now.

tbirdscwd · February 10th, 2011, 05:01 PM

You can wire in the additional FPDM, but it is't going to do anything until there is a second fuel pump present to receive a signal.

Willy Mo · February 10th, 2011, 05:05 PM

Im running the factory 03/04 cobra tank, hat, and pumps now. Stock 03/04 pumps, not the supercar pumps, but i was wondering if it would help lower my duty cycle.

Smoothgrandmama · February 10th, 2011, 05:08 PM

Yes... but not as much as a stage 2 modified fpdm....if i remeber correctly

Willy Mo · February 10th, 2011, 05:16 PM

a stage 2 modified FPDM is better then 2 factory ones? hmmm

Scott2001GT · February 10th, 2011, 10:26 PM

yeah it will lower it with a wiring upgrade but why waste your time..you dont need to

Shaun03GT · February 10th, 2011, 11:14 PM

It will lower it a little bit, but not much. You dont need a modded fpdm or a 2nd fpdm until you run twin 255's or ford gt pumps. But you could always just set it up so your fuel pump duty cycle is low. Thats always good.

Willy Mo · February 11th, 2011, 12:54 PM

yeah i know i dont "need" it. But i have the parts just sitting here, and a lower duty cycle is a good thing.

BakerFX4 · February 11th, 2011, 01:03 PM

hell, throw it on then. lol.

and since when was a mod FPDM "better" than dual fpdm's. Ive always heard that dual FPDM's is more reliable and a sure thing vs having some modified FPDM's still seeing thermal shutdown. I may be wrong but have heard stories of such info. dunno

I have Twin GT pumps and modified FPDM waiting to go in too. Just lazy and HATE working on this damn thing! lol

SWEET2KSTANG · February 11th, 2011, 01:03 PM

hell, if you have time go ahead and install it. its not going to hurt anything, not really going to help till its actually needed either.

Willy Mo · February 11th, 2011, 01:51 PM

Originally Posted by BakerFX4

hell, throw it on then. lol.

and since when was a mod FPDM "better" than dual fpdm's. Ive always heard that dual FPDM's is more reliable and a sure thing vs having some modified FPDM's still seeing thermal shutdown. I may be wrong but have heard stories of such info. dunno

I have Twin GT pumps and modified FPDM waiting to go in too. Just lazy and HATE working on this damn thing! lol

Originally Posted by SWEET2KSTANG

hell, if you have time go ahead and install it. its not going to hurt anything, not really going to help till its actually needed either.

this was my thinking. I have it here and it is something that will be needed down the road anyway, so whay not do it. The only problem is haveing the time to do something thats not in dire need lol.

Black Bullitt · February 11th, 2011, 03:40 PM

I can find a the link again to the wiring diagram if you want to do the dual FPDM. I have that installed on my Bullitt and honestly I'd rather have 2 FPDMs than 1 modified one. If one goes bad I can replace it and not be completely down. I could probably drive it just not getting into boost or hard throttle. Where if a single modified FPDM goes bad your up shit creek without a paddle and those aren't cheap. Just my

Oh, and I agree...install it. It won't do any better, but it won't hurt and when the time is right it's already done.

Willy Mo · February 11th, 2011, 04:48 PM

yeah if you have a link to a good write up, post it. I looked at a couple and they dont look very hard. I will prpbably wait unitl i put teh battery in the trunk to do the wire upgrade.

Black Bullitt · February 11th, 2011, 11:29 PM

This is not a how-to write up that I mentioned before. It is the wiring diagram, so keep that in mind.

WestCoastMustangs.com

Trick Tuners · February 13th, 2011, 12:52 PM

dual stock fpdms is better than a modified one.

Smoothgrandmama · February 13th, 2011, 01:34 PM

I have the lethal dual harness fpdm if anyone is interested

Softballer77 · March 26th, 2011, 11:04 AM

Smoothgrandmama...You still have that kit available? If it's unused, put a price on it for me...

I own a 2000gt i'm upgrading the fuel system on as well. New 03/04 tank, fore precision hat with dual gt pumps. It's together and waiting to go in, however obviously i noticed the wiring dilemma. I'm new to doing anything with fpdms. I'm guessing I'm going to have to go this route as well.

If i order this kit, i don't need 2 "new" fpdms correct? I can still use the one I have? I notice lethal performance shows a "omit 1 fpdm" to save $60.

My gt is pretty much stock other than a 150shot and a cai. Oh, and 410s. The motor is getting pulled in the future for something better (nearrr future), but I'm guessing I can't wire those dual gt pumps up together into the stock wiring to run off of one fpdm correct?

Thanks everyone.

February 10th, 2011, 04:56 PM	#1
Willy Mo MM Fanatic 2002 Mustang GT Join Date: Sep 2008 Location: MO Posts: 4,368 Blog Entries: 1 iTrader: 2 reviews	Dual FPDM Question I have a second FPDM and a 40amp BAP laying aroundm bc i havent needed them with the cobra setup. But I was wondering if I wire in teh second FPDM and do the wireing upgrade if it will help me out any right now. __________________

February 10th, 2011, 05:01 PM	#2
tbirdscwd MM Fanatic 2004 Mustang GT 12.88 @ 109.45 N/A Join Date: Feb 2010 Location: Davis, CA Posts: 3,417 iTrader: -1 reviews	You can wire in the additional FPDM, but it is't going to do anything until there is a second fuel pump present to receive a signal. __________________ Fun: 2004 Mustang GT DD: 1994 Ram 2500 Cummins 4x4 Borla "Stinger" Exhaust Vids

February 10th, 2011, 05:05 PM	#3
Willy Mo MM Fanatic 2002 Mustang GT Join Date: Sep 2008 Location: MO Posts: 4,368 Blog Entries: 1 iTrader: 2 reviews	Im running the factory 03/04 cobra tank, hat, and pumps now. Stock 03/04 pumps, not the supercar pumps, but i was wondering if it would help lower my duty cycle. __________________

February 10th, 2011, 05:08 PM	#4
Smoothgrandmama Assistant to the Manager 12 GT 8.46@88 1/8 Join Date: Apr 2007 Location: Willis,Texas Posts: 7,157 iTrader: 6 reviews	Yes... but not as much as a stage 2 modified fpdm....if i remeber correctly __________________ Join The MM Facebook: Modded Mustangs Facebook Vote For Modded Mustangs Ride of the Month Eskimo Brothers To Smooth: Safi, Blitz34, Graystang01, WillTheThrill, Bwal, 101Fng

February 10th, 2011, 05:16 PM	#5
Willy Mo MM Fanatic 2002 Mustang GT Join Date: Sep 2008 Location: MO Posts: 4,368 Blog Entries: 1 iTrader: 2 reviews	a stage 2 modified FPDM is better then 2 factory ones? hmmm __________________

February 10th, 2011, 10:26 PM	#6
Scott2001GT BYAHHHH! 2001 Mustang GT 13.874 Join Date: Mar 2008 Location: Missouri Posts: 14,793 Blog Entries: 1 iTrader: 3 reviews	yeah it will lower it with a wiring upgrade but why waste your time..you dont need to __________________ Precision Turbo\|TurboSmart\|TeamZ\|Strange\|Hellion\|BBK\|SCT\|Edge Converters\|Fairbanks\|CG Fabrications\|Treadstone

February 10th, 2011, 11:14 PM	#7
Shaun03GT I Post Entirely Way Too Much 2003 Mustang GT 1/8 - 7.92 @ 91.13mph 1/4 - 12.21 @ 115.84mph Join Date: Sep 2009 Location: Weymouth, MA Posts: 13,447 iTrader: 12 reviews	It will lower it a little bit, but not much. You dont need a modded fpdm or a 2nd fpdm until you run twin 255's or ford gt pumps. But you could always just set it up so your fuel pump duty cycle is low. Thats always good. __________________ Vortech V1 Intercooled @ 11psi 394rwhp/392rwtq @ 9.5psi 415rwhp/400rwtq @ 11psi on Methanol Tuned By: Pete @ Performance Dyno Affordable Supercharger Build Guide Supercharger Info for Noobs

February 11th, 2011, 12:54 PM	#8
Willy Mo MM Fanatic 2002 Mustang GT Join Date: Sep 2008 Location: MO Posts: 4,368 Blog Entries: 1 iTrader: 2 reviews	yeah i know i dont "need" it. But i have the parts just sitting here, and a lower duty cycle is a good thing. __________________

February 11th, 2011, 01:03 PM	#9
BakerFX4 I Post Entirely Way Too Much Join Date: Dec 2007 Location: Louisiana Posts: 16,252 iTrader: 14 reviews	hell, throw it on then. lol. and since when was a mod FPDM "better" than dual fpdm's. Ive always heard that dual FPDM's is more reliable and a sure thing vs having some modified FPDM's still seeing thermal shutdown. I may be wrong but have heard stories of such info. dunno I have Twin GT pumps and modified FPDM waiting to go in too. Just lazy and HATE working on this damn thing! lol __________________ 4.75 MMR 900se Livernois ported heads HP 292s blower cams Procharger D1sc at 20+ psi IW 15% OD pulley (and more bolt ons) E85 Tune/numbers coming shortly!!

February 11th, 2011, 01:03 PM	#10
SWEET2KSTANG mm's nitrous mod 2000 mustang gt 11.79@115.83 (old set up) Join Date: Oct 2006 Location: N.W. AR Posts: 12,540 iTrader: 8 reviews	hell, if you have time go ahead and install it. its not going to hurt anything, not really going to help till its actually needed either. __________________ project warhorse under construction wagon burner under construction as well (04 lightning) being built by MP2 Performance

February 11th, 2011, 04:48 PM	#13
Willy Mo MM Fanatic 2002 Mustang GT Join Date: Sep 2008 Location: MO Posts: 4,368 Blog Entries: 1 iTrader: 2 reviews	yeah if you have a link to a good write up, post it. I looked at a couple and they dont look very hard. I will prpbably wait unitl i put teh battery in the trunk to do the wire upgrade. __________________

February 13th, 2011, 12:52 PM	#15
Trick Tuners MM Fanatic KB'd GT Join Date: Nov 2006 Location: San Diego Posts: 4,467 iTrader: 3 reviews	dual stock fpdms is better than a modified one. __________________ Check out my forums for stuff on troubleshooting, tuning, etc We teamed up with Socal Performance Racing to bring dyno tuning to San Diego. Be friends with us on FB

February 13th, 2011, 01:34 PM	#16
Smoothgrandmama Assistant to the Manager 12 GT 8.46@88 1/8 Join Date: Apr 2007 Location: Willis,Texas Posts: 7,157 iTrader: 6 reviews	I have the lethal dual harness fpdm if anyone is interested __________________ Join The MM Facebook: Modded Mustangs Facebook Vote For Modded Mustangs Ride of the Month Eskimo Brothers To Smooth: Safi, Blitz34, Graystang01, WillTheThrill, Bwal, 101Fng

March 26th, 2011, 11:04 AM	#17
Softballer77 Look Ma! My First Post! Join Date: Mar 2011 Posts: 1 iTrader: 0 reviews	Smoothgrandmama...You still have that kit available? If it's unused, put a price on it for me... I own a 2000gt i'm upgrading the fuel system on as well. New 03/04 tank, fore precision hat with dual gt pumps. It's together and waiting to go in, however obviously i noticed the wiring dilemma. I'm new to doing anything with fpdms. I'm guessing I'm going to have to go this route as well. If i order this kit, i don't need 2 "new" fpdms correct? I can still use the one I have? I notice lethal performance shows a "omit 1 fpdm" to save $60. My gt is pretty much stock other than a 150shot and a cai. Oh, and 410s. The motor is getting pulled in the future for something better (nearrr future), but I'm guessing I can't wire those dual gt pumps up together into the stock wiring to run off of one fpdm correct? Thanks everyone.

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