Getting rid of factory fuel cutoff

Mustang_GT_90 · 05-23-2002, 03:49 PM

Ok here's a good one, how can I get rid of the factory 6250 RPM fuel cutoff on my car. I'm pushing right at 6000 RPM crossing the line at the end of 1/4 on the bottle so I'm not to thrilled at the aspect of going 250 more RPM and the fuel pump cutting out.

Any way to do this easilly I'm guessing it's something in the computer but being that most chips advanced timing I don't think it'd be a good idea to use a normal one on the bottle.

Anybody have any suggestions?

Thanks

jimberg · 05-23-2002, 04:38 PM

The best way would probably be to get the SVO Extender. It will allow you to change your Air/Fuel ratio, too.

Unit 5302 · 05-23-2002, 07:22 PM

If I recall correctly the SVO extender isn't being made anymore so it may be hard to come by. An EEC tuner should have that capability as well.

Mustang_GT_90 · 05-23-2002, 08:04 PM

I was trying to go with something a little cheaper maybe something simple too. Those tuners are like what around 400 bucks or so, that's kind of crazy just to get rid of the rev limiter. Any other ideas guys.

gtsr515 · 05-24-2002, 03:14 PM

The cheapest way around the factory rev-limiter is a custom chip, around $250.

LOBE_50 · 05-28-2002, 12:48 PM

Hmmmmm...

How about just getting a MSD 6AL for under $200, and you get a better ignition box along with rve limit control??

Old School yes, but it is a proven upgrade

LOBE
~~~~

fiveohpatrol · 05-28-2002, 01:00 PM

the MSD wont get rid of the factory rev limiter. It will just allow you to add an additional one at the desired RPM

WADS56 · 05-28-2002, 02:45 PM

I'm not sure how the EEC cuts fuel at 6250. If it is at the injecter you will need a chip, pms, etc... If it just cuts power to the pump you could just rewire the pump to a toggle switch that is hot at all times.

LOBE_50 · 05-28-2002, 02:59 PM

fiveohpatrol....

Can you explain that one???

I am confused, I thought the 6AL w/ rev limiter controls the max rpm limit?????

LOBE
~~~~~

gtsr515 · 05-28-2002, 04:02 PM

Gentlemen...The 5.0 6250rpm rev-limiter is a fuel cut-off, not electrical.

It is controlled by the EEC computer ONLY, NO MSD, CRANE, or other "BOX" will by-pass it, only piggyback EEC controller units can "override" EEC control inputs.

And...with your setup there is no reason to rev past 6250 and still make power, your package needs a change.

Bad89stang · 05-29-2002, 02:20 AM

Use some 255/60 tires

05-23-2002, 03:49 PM	#1
Mustang_GT_90 Registered Member Join Date: Apr 2002 Posts: 68	Getting rid of factory fuel cutoff Ok here's a good one, how can I get rid of the factory 6250 RPM fuel cutoff on my car. I'm pushing right at 6000 RPM crossing the line at the end of 1/4 on the bottle so I'm not to thrilled at the aspect of going 250 more RPM and the fuel pump cutting out. Any way to do this easilly I'm guessing it's something in the computer but being that most chips advanced timing I don't think it'd be a good idea to use a normal one on the bottle. Anybody have any suggestions? Thanks __________________ 90 Mustang, full weight, 5 speed, pulleys, 3.73 gears... 13.33@101 mph on stock motor and DOT's 12.44@112.5 on the juice. Check out our clubs website at http://www.stanggang.com

05-23-2002, 04:38 PM	#2
jimberg Registered Member Join Date: Oct 1998 Location: Rogers, MN Posts: 2,089	The best way would probably be to get the SVO Extender. It will allow you to change your Air/Fuel ratio, too. __________________ 351W 89 Mustang GT Convertible

05-23-2002, 08:04 PM	#4
Mustang_GT_90 Registered Member Join Date: Apr 2002 Posts: 68	I was trying to go with something a little cheaper maybe something simple too. Those tuners are like what around 400 bucks or so, that's kind of crazy just to get rid of the rev limiter. Any other ideas guys. __________________ 90 Mustang, full weight, 5 speed, pulleys, 3.73 gears... 13.33@101 mph on stock motor and DOT's 12.44@112.5 on the juice. Check out our clubs website at http://www.stanggang.com

05-24-2002, 03:14 PM	#5
gtsr515 Registered Member Join Date: Nov 2001 Location: Sunny, Hot, Sebring, Florida Posts: 725	The cheapest way around the factory rev-limiter is a custom chip, around $250. __________________ Remember...2nd place is 1st place for losers!

05-28-2002, 12:48 PM	#6
LOBE_50 Registered Member Join Date: Oct 2001 Location: RI Posts: 30	Hmmmmm... How about just getting a MSD 6AL for under $200, and you get a better ignition box along with rve limit control?? Old School yes, but it is a proven upgrade LOBE ~~~~ __________________ 1991 Mustang GT, 1 5/8" Jet-Hot coated BBK Long tubes, w/ matching shorty o/r H-pipe, Flowmaster cat back 2 chambers, 3.55:1 gears, Kenne Belle RAM Air (may be removing), Underdrive pulleys. , C&L 76mm Mass Air meter, 65mm FMS TB. Soon to be added intakes and then HEADS.

05-23-2002, 07:22 PM	#3
Unit 5302 Registered Member Join Date: May 1999 Posts: 5,246	If I recall correctly the SVO extender isn't being made anymore so it may be hard to come by. An EEC tuner should have that capability as well.

05-28-2002, 01:00 PM	#7
fiveohpatrol I'd rather be basketweaving Join Date: Feb 2000 Location: Indianapolis Posts: 2,551	the MSD wont get rid of the factory rev limiter. It will just allow you to add an additional one at the desired RPM __________________ NMRA O/C 9516 NA pumpgas stickshift 347 10.65@125.6, 6.73@100, 1.41 60ft

05-28-2002, 02:45 PM	#8
WADS56 gear banger Join Date: Aug 2000 Location: CHICAGO Posts: 1,144	I'm not sure how the EEC cuts fuel at 6250. If it is at the injecter you will need a chip, pms, etc... If it just cuts power to the pump you could just rewire the pump to a toggle switch that is hot at all times. __________________ 79 Hatch: NA 347, Stage 2 Canfield Heads, Victor JR. Intake, Blueprinted Holley 750 HP, Solid Roller Cam, Shooting for 10's on motor 93 LX: Tremec, dual friction clutch, fms flywheel, Hedman shorties, O/R H-pipe Ricer hater's club member #49

05-28-2002, 02:59 PM	#9
LOBE_50 Registered Member Join Date: Oct 2001 Location: RI Posts: 30	fiveohpatrol fiveohpatrol.... Can you explain that one??? I am confused, I thought the 6AL w/ rev limiter controls the max rpm limit????? LOBE ~~~~~

05-28-2002, 04:02 PM	#10
gtsr515 Registered Member Join Date: Nov 2001 Location: Sunny, Hot, Sebring, Florida Posts: 725	Gentlemen...The 5.0 6250rpm rev-limiter is a fuel cut-off, not electrical. It is controlled by the EEC computer ONLY, NO MSD, CRANE, or other "BOX" will by-pass it, only piggyback EEC controller units can "override" EEC control inputs. And...with your setup there is no reason to rev past 6250 and still make power, your package needs a change. __________________ Remember...2nd place is 1st place for losers!

05-29-2002, 02:20 AM	#11
Bad89stang Registered Member Join Date: Aug 2001 Location: Ft. Worth, TX Posts: 456	Use some 255/60 tires __________________ You're gonna need your seatbelt

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