fuel pump and throttle body

nextime · 03-14-2002, 07:08 PM

as you can see i havent been on the site for a long time, actually since 1998. so my mustang was in and out of storage due to a divorce and havent payed much attention to it for the past 3 years. last year i took it out and installed a centerforce II clutch pressure plate and throw out bearing and wild rides torque box repair kits. anyway summer is here soon and i need help. you might need to know what is on my car first so here is the list.....bbk 1 5/8 headers ,borla cat back exhaust, mega bite jr. lower control arms, monroe formula gp struts and shocks, flex-a-lite black magic fan,3 core radiator, cobra grille, Jacob's ignition with wires and boost master and anti-theft ignition disabler, paxton 5lb supercharger with oil cooler and boost gauge, steeda short throw shifter, steeda clutch quadrant with firewall adjuster and steeda clutch cable. so i need a new fuel pump and i dont plan to get a fuel pressure regulator and i cant remember if the 155lph will run without changing my fuel pressure regulator and also what size is best to replace my stock throttle body? i must tell you this car needs to be emmissons legal. thanks for all of your help in advance.....nextime A.K.A. mark

Hozer 88GTConv · 03-14-2002, 08:49 PM

I would strongly suggest getting a FPR. Tuning without it will be a real pain. If I can ask, why won't you spend the $100 and 30 minutes to put a FPR on? Just an opinion. Good luck, sounds like you have a great combo.

nextime · 03-14-2002, 09:26 PM

my car runs great with the stock fuel pump but it is real noisy and i know it wont last long plus i dont want to mess with the fuel pressure.

PKRWUD · 03-14-2002, 10:32 PM

You really need to be able to adjust your pressure in order to properly (and safely) tune a supercharged engine.

Take care,
-Chris

nextime · 03-14-2002, 10:38 PM

i havent had any problem for 68,000 supercharged miles with the stock pump so why would i need to adjust my pressure now?

PKRWUD · 03-14-2002, 10:52 PM

You have a great point, but I still think you should have the ability to adjust it. Especially if you replace the pump. If you don't want one, don't buy one, but I would.

Take care,
-Chris

mustang17 · 03-14-2002, 11:15 PM

You should get a 70mm TB, stock must be killing some power.

With what you have, you should listen to the above advice and get a dyno tune. You may not have a problem, but you may also not be getting full power. You might have a problem if you start messing with the fuel system.

What size injectors do you have?

nextime · 03-15-2002, 04:47 PM

stock 19lb injectors i have. the only mods to the engine are headers and paxton supercharger besides the jacobs ignition control and jacobs boostmaster.

gtsr515 · 03-15-2002, 09:02 PM

A blower without a FPR and a stock pump is a disaster waiting to happen, can you say "LEAN", do it right, upgrade to 30lb injectors, FPR, and a 190lph pump, why try to get away with something that could potentially hole a piston or worse, the regulator, pump, and injectors should have been bought first, remember, dont put the cart in front of the horse.

And as far as a trottle body, I would stay stock with the package you have now, why increase airflow, but not fuel flow, I don't understand your reasoning, but its your car, I just hope you have a trailer

nextime · 03-15-2002, 09:31 PM

do you know anything about a paxton MISTER gtsr515 on a stock engine? first it comes with a vaccum regulator that controls fuel flow in boost, second it only can be fed nothing less than 91 octaine or it will go boom, third the paxton i got is designed to run on a 100% stock system WITH NO UPGRADES. fourth i have 68,000 hard supercharged miles with no problems no holes in pistons. i am not running 10 or more pounds of boost to even worry about a blown engine and i think the enginer's at paxton know what they are doing when they said i dont need any upgrades. all i was asking will a 155lph run corectly without changing my stock that is doing a wonderful job regulator and what throttle body to get i wasnt asking for anything else and still nobody has answerd my questions except for my throttle body so thank you MUSTANG17 for the throttle body answers and also thanks PKRWUD for the insight on the new pump needing a FPR to run smooth.

gtsr515 · 03-15-2002, 09:40 PM

No, I don't know anything about a supercharger Better check those trailer bearings.

03-14-2002, 07:08 PM	#1
nextime Registered Member Join Date: Sep 1998 Location: Brookfield,Wisconsin,US Posts: 23	fuel pump and throttle body as you can see i havent been on the site for a long time, actually since 1998. so my mustang was in and out of storage due to a divorce and havent payed much attention to it for the past 3 years. last year i took it out and installed a centerforce II clutch pressure plate and throw out bearing and wild rides torque box repair kits. anyway summer is here soon and i need help. you might need to know what is on my car first so here is the list.....bbk 1 5/8 headers ,borla cat back exhaust, mega bite jr. lower control arms, monroe formula gp struts and shocks, flex-a-lite black magic fan,3 core radiator, cobra grille, Jacob's ignition with wires and boost master and anti-theft ignition disabler, paxton 5lb supercharger with oil cooler and boost gauge, steeda short throw shifter, steeda clutch quadrant with firewall adjuster and steeda clutch cable. so i need a new fuel pump and i dont plan to get a fuel pressure regulator and i cant remember if the 155lph will run without changing my fuel pressure regulator and also what size is best to replace my stock throttle body? i must tell you this car needs to be emmissons legal. thanks for all of your help in advance.....nextime A.K.A. mark

03-14-2002, 08:49 PM	#2
Hozer 88GTConv Registered Member Join Date: Feb 2002 Location: Jacksonville, FL Posts: 706	Are you sure? I would strongly suggest getting a FPR. Tuning without it will be a real pain. If I can ask, why won't you spend the $100 and 30 minutes to put a FPR on? Just an opinion. Good luck, sounds like you have a great combo. __________________ 1988 GT Convertible 331 10:1 TW heads, GT-40 intake, MSD, TRW flattops, B Cam w/ 1.7's, MAC exhaust, 24's, 70 TB, 76 MAF, 3.73's, Pro 5.0, Koni's, Anderson PMS, Wideband 02, yatta, yatta... One week with new motor, two speeding tickets...joy

03-14-2002, 09:26 PM	#3
nextime Registered Member Join Date: Sep 1998 Location: Brookfield,Wisconsin,US Posts: 23	well my car runs great with the stock fuel pump but it is real noisy and i know it wont last long plus i dont want to mess with the fuel pressure.

03-14-2002, 10:32 PM	#4
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	You really need to be able to adjust your pressure in order to properly (and safely) tune a supercharged engine. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

03-14-2002, 10:38 PM	#5
nextime Registered Member Join Date: Sep 1998 Location: Brookfield,Wisconsin,US Posts: 23	ok i havent had any problem for 68,000 supercharged miles with the stock pump so why would i need to adjust my pressure now?

03-14-2002, 10:52 PM	#6
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	You have a great point, but I still think you should have the ability to adjust it. Especially if you replace the pump. If you don't want one, don't buy one, but I would. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

03-14-2002, 11:15 PM	#7
mustang17 Registered Member Join Date: Sep 2000 Location: Concord, MA, USA Posts: 264	You should get a 70mm TB, stock must be killing some power. With what you have, you should listen to the above advice and get a dyno tune. You may not have a problem, but you may also not be getting full power. You might have a problem if you start messing with the fuel system. What size injectors do you have? __________________ 1995 GT Black- Edelbrock- 6037's,Intake, cam,70mm TB,75mm pro-m,Equal length headers,3.73's and all the bolt on's. SOLD 12/5/01 NEW! Mercedes-Benz SLK 230 Red/Black. Kleemann boost increase on the way!

03-15-2002, 04:47 PM	#8
nextime Registered Member Join Date: Sep 1998 Location: Brookfield,Wisconsin,US Posts: 23	stock stock 19lb injectors i have. the only mods to the engine are headers and paxton supercharger besides the jacobs ignition control and jacobs boostmaster.

03-15-2002, 09:02 PM	#9
gtsr515 Registered Member Join Date: Nov 2001 Location: Sunny, Hot, Sebring, Florida Posts: 725	A blower without a FPR and a stock pump is a disaster waiting to happen, can you say "LEAN", do it right, upgrade to 30lb injectors, FPR, and a 190lph pump, why try to get away with something that could potentially hole a piston or worse, the regulator, pump, and injectors should have been bought first, remember, dont put the cart in front of the horse. And as far as a trottle body, I would stay stock with the package you have now, why increase airflow, but not fuel flow, I don't understand your reasoning, but its your car, I just hope you have a trailer __________________ Remember...2nd place is 1st place for losers! Last edited by gtsr515; 03-15-2002 at 09:08 PM..

03-15-2002, 09:31 PM	#10
nextime Registered Member Join Date: Sep 1998 Location: Brookfield,Wisconsin,US Posts: 23	do you know anything about a paxton MISTER gtsr515 on a stock engine? first it comes with a vaccum regulator that controls fuel flow in boost, second it only can be fed nothing less than 91 octaine or it will go boom, third the paxton i got is designed to run on a 100% stock system WITH NO UPGRADES. fourth i have 68,000 hard supercharged miles with no problems no holes in pistons. i am not running 10 or more pounds of boost to even worry about a blown engine and i think the enginer's at paxton know what they are doing when they said i dont need any upgrades. all i was asking will a 155lph run corectly without changing my stock that is doing a wonderful job regulator and what throttle body to get i wasnt asking for anything else and still nobody has answerd my questions except for my throttle body so thank you MUSTANG17 for the throttle body answers and also thanks PKRWUD for the insight on the new pump needing a FPR to run smooth. __________________ Thank You! 2003 Cobra Convertible

03-15-2002, 09:40 PM	#11
gtsr515 Registered Member Join Date: Nov 2001 Location: Sunny, Hot, Sebring, Florida Posts: 725	No, I don't know anything about a supercharger Better check those trailer bearings. __________________ Remember...2nd place is 1st place for losers!

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