rev limiter

[craig5.0]

Whats the cheapest and best way to get around the stock rev limiter?

[302 LX Eric]

It may not be the cheapest, but if you purchase a custom burnt chip (i.e. JMS Chip) you can have them set the rev limiter to whatever you desire.

Just as a side note, if you're in stock or near stock trim, you really don't need to go much higher than the stock limiter. Stock 5.0's HP&TQ drop off quicker than you think. Even my heads/cam/intake combo made peak power at only 5300 rpm and peak TQ at 4500. Just food for thought.

Take care,
E

[mysweetlx]

I'm not quite sure that a custom burnt chip can raise the rev limiter on a '90.

[302 LX Eric]

It should work. The 90, just as my 91, used the EEC-IV computer. He probably has an A9L computer which should work just fine. I'm sure JMS can do it.

E

[RdRunnr]

Originally posted by mysweetlx
I'm not quite sure that a custom burnt chip can raise the rev limiter on a '90.

With a custom chip you can set the rev limiter at whatever you want or virtually eliminate it all together.

[RPM427]

I should know this but...... What does the stock rev limiter do?, does it cut off spark or fuel, or both, and at what RPM? I've accedetly reved mine to about 7k for a second so what is it good for? thanks

[RdRunnr]

If you were going by the factory tach you probably didnt come anywhere near 7k. The higher you go the more innacurate the factory tach is. I found mine to be off almost 1500 compared to my monster tach. There is one year computer that has the limiter set at 7300. All others are set at 6250. The limiter pulls both spark and fuel, which can be disasterous under boost.

[gtsr515]

A custom chip is the cheapest, the stock rev-limiter on your car cuts fuel ONLY, sequentially at 6250, still need spark to fire whats left. Understand that the rev limiter can only stop the fuel from flowing, it cannot stop the momentum of the motor, thats why it showed on the tach, which is notoriously off by around a 1000rpm up there. You don't need to get around the limiter anyway do you, whats your reasons?

[RdRunnr]

Originally posted by gtsr515
A custom chip is the cheapest, the stock rev-limiter on your car cuts fuel ONLY, sequentially at 6250, still need spark to fire whats left.

If your defininition of pulling spark means that the car is still "firing" then you obviously have no idea what pulling spark means and do not have much expierence with tuning or working with the eec. You obviously have never ridden against a limiter before either. The stock limiter does pull both fuel and spark, meaning advanced spark. When you hit the limiter you can put your foot down all day long, but the car will not rev past the limiter. That is why guys use two-steps, so they can keep their foot down and not go past a certain rpm at launch. This is also why on a blown car it is important to set the factory limiter above the limiter on say a 6AL, so you pull spark only and the car will only rev up to the chip in the limiter, and you do not pull fuel.

[Stroked408]

When I installed a E303 in my car and drove it around,I revved it to what I thought was 7000 rpm's,then I read an article in Muscle Mustangs and Fast Fords that there is a 6250 rev-limiter in the car.
My first thought what does some magazine guy know about my car,if the factory tach said 7000 rpm then by god that motor just revved to 7000 rpm's.
Well I went and bought a Auto Meter tach that has 2 needles on it,one that moves and one that sits at the shift point. What a wake up call that was,I had one of my friends in the car with me and I say watch how high this E303 cam can rev........right about the time the tach hit 6200 the needle started shuttering,and I was so emberrassed,last time I did not believe what a magazine told me for awhile,they still once in awhile contradict themselves but some of that propoganda can be money saving.
Long story short,if you want to get around the rev-limiter you can buy an Extender,EPEC,PMS,or switch it out for DFI,I think DFI has changed their name but I think everyone knows what I am talking about.

[gtsr515]

I see, and what year was that special windsor EEC that the limiter was set to 7300 rpm? I'm sure with your vast knowledge you can supply me with that info right?

And another thing, your right, I don't spend much time hitting the rev-limiter as my package is done right. Probably a result of my inexperience.

[Stroked408]

Good point GTSR,
I would like to know what year also,if I can find a junk GT/LX with that computer,I do not need to buy an Extender then.

[srv1]

Originally posted by RdRunnr


When you hit the limiter you can put your foot down all day long, but the car will not rev past the limiter.

Eric, i have pegged mine past 7grand by accident! the needle went in the black area. i was washing my car and vacuumed the carpets, well i wasnt paying attention and i put the carpet under the gas pedal. when i was going down the road, i felt like doing the 3-2 shift, well thats when it stuck and oh shiat! first thing i did was turn the ignition off. i had no idea what just happened. now i know the factory tachs are off, but if i pegged it to the bottom of the gauge past the 7 mark, wouldnt i be past 6250? i lucked out, nothing happened to the motor. the lifters were clackin, but i let it sit and ran it gently and they pumped back up. oh i have seen a 90's 5 ohs that been put past 6250 with an aftermarket tach. the car was stock with cats. one of my stupid friends tried to see if he can make the car "pull" up there. why? i dont know. i just wanted to see him blow his motor. guess what, blew the lifters apart. what a stupid kid

[Stroked408]

hmmmm maybe it is the 90 Mustangs with the 7300 limiter,I can only speak for myself,maybe my car is a ringer with a 6250 in it.

I watched both tachs one day(now I know why I see double) and the factory tach was like 800rpm off,just going through the gears easy it is 400rpm off,get an aftermarket tach to be safe so you do not end up gearing it wrong,because that can really be frustrating.

Good luck with it

[gtsr515]

Guy's, there is no windsor EEC that limits at 7300 rpm, "Mr. Junior member/44 post's" is dreaming. Next!

[RdRunnr]

Originally posted by Stroked408
hmmmm maybe it is the 90 Mustangs with the 7300 limiter,I can only speak for myself,maybe my car is a ringer with a 6250 in it.

I watched both tachs one day(now I know why I see double) and the factory tach was like 800rpm off,just going through the gears easy it is 400rpm off,get an aftermarket tach to be safe so you do not end up gearing it wrong,because that can really be frustrating.

Good luck with it

No, my 90 has the 6250 as well. I have used an extender and then a eec tuner to bypass it on mine. Byron who developed the sneec datalogger was telling me about this one. I will find out what year it is from and what the computer code is and post it for you guys later.

[RdRunnr]

Originally posted by gtsr515
Guy's, there is no windsor EEC that limits at 7300 rpm, "Mr. Junior member/44 post's" is dreaming. Next!

When did post count become a sign of someone's intelligence? You were a newbie yourself once. I am trying to help out and if you do not agree that is fine, but that is no reason to put me or anyone else down. That only further illustrates your ignorance.

[Stroked408]

thanks Eric,
appreciate it I would really like to know because Ford is notorious for building special computers and what not,look at the difference between the 97 and 98 Cobras,98 has a lot more torque than a 97 would not have knew that until I drove both under the same conditions.

[gtsr515]

But yet your 1st responce to my input was that I "obviously don't have any experience in tuning" and "I've never been up against the rev limiter", can't wait to see the Ford part number on that 7300 rpm limited EEC.

[Stroked408]

LOL