Rev limiter: Did I hurt the stang?

Beau · Jan 29, 2004

GinoGT said:
I've bounced off the limiter a couple of times, just don't let it sit there.

FallenPhoenix · Jan 29, 2004

it wasn't a pure race car, it was run in some kind of street legal class. Maybe when the engine torques it pulls against the mounts. I'd kind of like to know if it's true or not too.

StangLou · Jan 29, 2004

Yeah, Ive hit the rev limiter more than I can remember . Its there for a reason, so I dont worry about to much of it.

GinoGT · Jan 29, 2004

I've read (by an experienced engine builder, forget which forums) that when the rev limiter kicks in, it pulls ALL the fuel out of the engine, not just leaning it out. He said the reason why an engine can be damaged is not because it runs super lean, there's no fuel in the engine at all for it to run lean on. It's because of the huge shocks/forces of the engine going from producing all of this HP, to producing almost nothing, and back again in only fractions of a second. It sounds like the engine almost tears itself apart.

FallenPhoenix · Jan 29, 2004

well hell wouldn't it just be better to pull the spark or even just close the throttle? That doesn't sound good for the engine at all.

GinoGT · Jan 29, 2004

FallenPhoenix said:
well hell wouldn't it just be better to pull the spark or even just close the throttle? That doesn't sound good for the engine at all.

Pulling the spark would do the same thing with the "shocking the engine" idea. Plus you would have all this fuel in the cylinder not even combusted, most of it going into the exhaust. I'm sure there's some hippy treehuggers in Washington or the EPA that have laws against that. Then whatever fuel might be left from the un-combusted cycle might make the engine run rich. (Who knows how much would be left behind, I've never heard anyone test something like this.)

Having the computer close the throttle would only be an option on a car with throttle-by-wire. Even then, who knows if that would react fast enough.

forpit2000gt · Jan 29, 2004

I have been into the limiter on launch and at the top of gears. It is not good to hold it there but you are probably alright.

Technically, our cars are electronic throttled. When you mash the gas pedal it only allows more air in and a sensor sends the information as to what position the throttle is in to add or reduce the amount of fuel.

GinoGT · Jan 29, 2004

forpit2000gt said:
I have been into the limiter on launch and at the top of gears. It is not good to hold it there but you are probably alright.

Technically, our cars are electronic throttled. When you mash the gas pedal it only allows more air in and a sensor sends the information as to what position the throttle is in to add or reduce the amount of fuel.

That's just the throttle position sensor. The next Mustang (GT at least) will be a real electronic throttle (drive-by-wire) where a little motor operates the throttle body. I think it's stupid.....one more thing to go wrong.

FallenPhoenix · Jan 29, 2004

my dad's '03 4runner has the throttle by wire. personally I don't think the pedal feel is very realistic, almost like driving a race car on the computer. There are some good points to it, but like ginoGT said, just one more thing to go wrong.

2k2fourpointsix · Jan 29, 2004

So is it bad to be bouncing off the limiter when doing a burnout at the track in 1st, or doing a brake stand on the street?

GinoGT · Jan 29, 2004

2k2fourpointsix said:
So is it bad to be bouncing off the limiter when doing a burnout at the track in 1st, or doing a brake stand on the street?

Just a couple little bounces should be okay. Once you notice yourself bouncing, you should back off. If you're sitting there bouncing, I'd say that's bad.

forpit2000gt · Jan 30, 2004

2k2fourpointsix said:
So is it bad to be bouncing off the limiter when doing a burnout at the track in 1st, or doing a brake stand on the street?

2nd gear burnouts at the track work better.

01BlkGT · Jan 30, 2004

And make sure not to bounce off the rev limiter if you are blown...... You should be fine, I've done it a few times and the car still runs like a champ. Just dont make it a habit.

Mustang92 · Feb 2, 2004

A few times revving it past the limiter shouldn't hurt anything. Last week in the rain someone cut me off and my horn didn't work so I revved the motor up so they knew I was pissed and the limiter didn't catch it in time and it cruised up to 7K real quick. Personally I believe with proper maintenance these motors can handle a lot. I now launch my car at 6500 RPM sitting on the rev limiter (I moved it up past the 6050 stock limiter).

Bill

GinoGT · Feb 2, 2004

Mustang92 said:
...so I revved the motor up so they knew I was pissed...

Been there, done that. It's nice having the ability to express yourself with RPM's.

stang9300 · Feb 3, 2004

To hell with it. My engine has 70K miles on it and I have hit my rev limiter too many times to count, when the auto tranny doesn't shift fast enough when I am manually shifting it, or when the tires break loose in first or second gear it tends to jump in rpms too fast. The limiter is there for a reason, use it.

CharlieHustle · Mar 12, 2004

hitting the rev limiter with a diablo chip

I have an automatic 2000 Gt, with a diablo chip installed. When I floor it at the track I always hit the rev limiter. Before I had the chip installed, I never had this problem. If I give it about 3/4ths gas it will shift fine. There is no way that I can floor it, without redlining. The only way to come out of the "red" is to let off the gas. The car will not shift at all. The car runs a 14.0 with the chip turned off, and a 14.6-15.0 with the chip on. The chip is brand new and programmed by rpmoutlet.com. A local performance shop said to try having the transmission fluid changed. Does anyone think that will help? The car has 56k miles on it. Thanks

GinoGT · Mar 12, 2004

CharlieHustle said:
I have an automatic 2000 Gt, with a diablo chip installed. When I floor it at the track I always hit the rev limiter. Before I had the chip installed, I never had this problem. If I give it about 3/4ths gas it will shift fine. There is no way that I can floor it, without redlining. The only way to come out of the "red" is to let off the gas. The car will not shift at all. The car runs a 14.0 with the chip turned off, and a 14.6-15.0 with the chip on. The chip is brand new and programmed by rpmoutlet.com. A local performance shop said to try having the transmission fluid changed. Does anyone think that will help? The car has 56k miles on it. Thanks

If it works right without the chip, and screws up with the chip.............sounds like it's the chip. Changing the tranny fluid wouldn't do anything.

CharlieHustle · Mar 12, 2004

chip

this is the second diablo chip ive had installed. the first one was used, so i sold it, and bought a brand new one. now im having the same exact problem. anyone have any ideas how to fix it? or if i get rid of the chip, how much does a speedcal cost since i have the 3.73? thanks

GinoGT · Mar 12, 2004

CharlieHustle said:
this is the second diablo chip ive had installed. the first one was used, so i sold it, and bought a brand new one. now im having the same exact problem. anyone have any ideas how to fix it? or if i get rid of the chip, how much does a speedcal cost since i have the 3.73? thanks

You need a chip, reflash, or a programmer since you have an automatic. Only manuals can use the speedcal.

Rev limiter: Did I hurt the stang?

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