too many RPMS?

avbcon12 · 05-17-2002, 06:44 PM

i just overevved the he** out of my motor. to like 6750 (stock tach) it didnt seem like i hit a rev limiter though (which i thought was at 6250). i just hope i didnt effect my motor at all. it still runs fine and oil pressure is still where it usually is.

why didnt i hit the rev limiter, and what could happen because of this?

thanks,
adam

LX XLR8R · 05-17-2002, 08:28 PM

stock tach is wayyyyy off

avbcon12 · 05-17-2002, 08:32 PM

i thought so, i didnt think it could be right. i dont even think i hit the rev limiter and the tach might have peaked at 7000 so...

thanks,
adam

Bad89stang · 05-17-2002, 09:53 PM

Don't worry about it. I have done the same thing a hundred times. I have looked down while spinning in 1st and been way over 6K many times. I know my tach is off by at least 500 rpm. I saw the real rpms while getting an emmissions test and looking at the dash simultaneously.

PKRWUD · 05-17-2002, 10:39 PM

Also, the stock tach is at it's worst (inaccurate) when it's spiked quickly. When throwing revs, it is often as much as 1500 rpms off.

Take care,
-Chris

avbcon12 · 05-18-2002, 07:44 AM

thanks guys, i appreciate it

adam

MustangGT · 05-18-2002, 07:53 AM

If Im not mistaken on this, Ford has built into the computer what they call a rev limiter. at the 6000ish rpm range I believe it starts shutting off the injectors.

Im not certain about this however I think my good cyberbuddy JimBerg was telling me about it one time... Jim?

MustangGT

PKRWUD · 05-18-2002, 07:58 AM

Yes, that is correct. That's what he was asking in the beginning of this thread. The problem is that his true rpms, which the limiter refers to, were much lower than what the tach said, so he was concerned that perhaps his limiter wasn't working, when in fact it's the factory tach that is off.

Take care,
-Chris

avbcon12 · 05-18-2002, 08:11 AM

chris,

is there any way to make the stock tach more accurate? or is there an aftermarket tach that replaces the stock one. im trying to keep my mustang stock looking yet pretty powerful on the street. if not, i can deal with it.

thanks,
adam

PKRWUD · 05-18-2002, 01:58 PM

Boy, that's a good question. I would think that someone somewhere makes gauges that fit into the stock location, but I don't know of any off the top. The stock tach is pretty much junk, and that can't be changed. You could always add a mini tach to the steering column, that could be easily removed without any permenant damage. Just a thought.

Good luck!

Take care,
-Chris

05-17-2002, 06:44 PM	#1
avbcon12 Registered Member Join Date: Jul 2001 Location: West Bloomfield, MI Posts: 391	too many RPMS? i just overevved the he** out of my motor. to like 6750 (stock tach) it didnt seem like i hit a rev limiter though (which i thought was at 6250). i just hope i didnt effect my motor at all. it still runs fine and oil pressure is still where it usually is. why didnt i hit the rev limiter, and what could happen because of this? thanks, adam __________________ 90 GT black/ grey leather ported GT-40 heads w/ 1.7RR, Cobra intake w/ ported lower, 24# injectors, 190LPH pump, 75mm Pro-M MAF, 65mm TB, K&N panel, BBK long tubes, Off road H-pipe, 2 ch. Flowmaster, Black magic fan, Kirban FPR, 180 deg. T-stat, 3.73's, Steeda Tri-Ax, 130 amp alt. Accell 8.8 race wires/cap/rotor, motorcraft plugs, Factory Five suspension, etc etc etc.... http://avbcon12.stangnet.com

05-17-2002, 08:28 PM	#2
LX XLR8R Dirk Diggler Join Date: Feb 1999 Location: SLOATSBURG, NY Posts: 1,931	stock tach is wayyyyy off __________________ 95 undecided cubes, AFR 185s,undecided cam, undecided intake, and a 150 hit 89 "turbonotch" 2.3T You might want to hold on..i saw this on a cartoon once

05-17-2002, 08:32 PM	#3
avbcon12 Registered Member Join Date: Jul 2001 Location: West Bloomfield, MI Posts: 391	i thought so, i didnt think it could be right. i dont even think i hit the rev limiter and the tach might have peaked at 7000 so... thanks, adam __________________ 90 GT black/ grey leather ported GT-40 heads w/ 1.7RR, Cobra intake w/ ported lower, 24# injectors, 190LPH pump, 75mm Pro-M MAF, 65mm TB, K&N panel, BBK long tubes, Off road H-pipe, 2 ch. Flowmaster, Black magic fan, Kirban FPR, 180 deg. T-stat, 3.73's, Steeda Tri-Ax, 130 amp alt. Accell 8.8 race wires/cap/rotor, motorcraft plugs, Factory Five suspension, etc etc etc.... http://avbcon12.stangnet.com

05-17-2002, 09:53 PM	#4
Bad89stang Registered Member Join Date: Aug 2001 Location: Ft. Worth, TX Posts: 456	Been there... Don't worry about it. I have done the same thing a hundred times. I have looked down while spinning in 1st and been way over 6K many times. I know my tach is off by at least 500 rpm. I saw the real rpms while getting an emmissions test and looking at the dash simultaneously. __________________ You're gonna need your seatbelt

05-17-2002, 10:39 PM	#5
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Also, the stock tach is at it's worst (inaccurate) when it's spiked quickly. When throwing revs, it is often as much as 1500 rpms off. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

05-18-2002, 07:44 AM	#6
avbcon12 Registered Member Join Date: Jul 2001 Location: West Bloomfield, MI Posts: 391	thanks guys, i appreciate it adam __________________ 90 GT black/ grey leather ported GT-40 heads w/ 1.7RR, Cobra intake w/ ported lower, 24# injectors, 190LPH pump, 75mm Pro-M MAF, 65mm TB, K&N panel, BBK long tubes, Off road H-pipe, 2 ch. Flowmaster, Black magic fan, Kirban FPR, 180 deg. T-stat, 3.73's, Steeda Tri-Ax, 130 amp alt. Accell 8.8 race wires/cap/rotor, motorcraft plugs, Factory Five suspension, etc etc etc.... http://avbcon12.stangnet.com

05-18-2002, 07:53 AM	#7
MustangGT Registered Member Join Date: May 2002 Location: Northern California Posts: 9	If Im not mistaken on this, Ford has built into the computer what they call a rev limiter. at the 6000ish rpm range I believe it starts shutting off the injectors. Im not certain about this however I think my good cyberbuddy JimBerg was telling me about it one time... Jim? MustangGT

05-18-2002, 07:58 AM	#8
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Yes, that is correct. That's what he was asking in the beginning of this thread. The problem is that his true rpms, which the limiter refers to, were much lower than what the tach said, so he was concerned that perhaps his limiter wasn't working, when in fact it's the factory tach that is off. Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

05-18-2002, 08:11 AM	#9
avbcon12 Registered Member Join Date: Jul 2001 Location: West Bloomfield, MI Posts: 391	chris, is there any way to make the stock tach more accurate? or is there an aftermarket tach that replaces the stock one. im trying to keep my mustang stock looking yet pretty powerful on the street. if not, i can deal with it. thanks, adam __________________ 90 GT black/ grey leather ported GT-40 heads w/ 1.7RR, Cobra intake w/ ported lower, 24# injectors, 190LPH pump, 75mm Pro-M MAF, 65mm TB, K&N panel, BBK long tubes, Off road H-pipe, 2 ch. Flowmaster, Black magic fan, Kirban FPR, 180 deg. T-stat, 3.73's, Steeda Tri-Ax, 130 amp alt. Accell 8.8 race wires/cap/rotor, motorcraft plugs, Factory Five suspension, etc etc etc.... http://avbcon12.stangnet.com

05-18-2002, 01:58 PM	#10
PKRWUD Junior Member Join Date: Mar 1999 Location: Ventura, California Posts: 8,981	Boy, that's a good question. I would think that someone somewhere makes gauges that fit into the stock location, but I don't know of any off the top. The stock tach is pretty much junk, and that can't be changed. You could always add a mini tach to the steering column, that could be easily removed without any permenant damage. Just a thought. Good luck! Take care, -Chris __________________ Webmaster: Rice Haters Club Jim Porter Racing Peckerwoods Pit Stop Support Your Local RED & WHITE!

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