7AFE Rev Limiiter

[gmotorsports]

I was wondering if anyone had electrical knowledge on how to remove the rev limiter from a 94 Corolla?

[speedy25]

why would you want to?

-SP

[topnotch]

removing the rev limiter can result in dangerous situations with your engine. if you are looking to get higher revs then you need to do some engine upgrades and tuning to accomplish this.

[Bitter]

unless you've got a built engine with some nice cams there is no reason to rev a 7A-FE beyond 6200 RPM.

[cipher93]

I agree with those above. To turn more RPMs, in general, you need stronger pistons, rod, and crank, more aggressive cams, upgraded bearings, and probably an upgraded head gasket. The 7AFE is a pretty strong motor, but as bitter mentioned, without the cams, you'll only see a loss in power. Also keep in mind, to over generalize, the more RPMs you turn, the less torque you're likely to have.

EDIT: If you wanted to remove it, I would imagine you would need to reprogram the ECU or go with some kind of piggy back system.

[Bitter]

IIRC you need to replace a crystal clock generator with a different one (on the PCB). I'm not familiar with it well enough to know any more.

[gmotorsports]

I have a built motor from the oil pan to the valve cover. I short track asphalt race my 94' corolla. Believe it or i beat on a weekly basis, civics, integras, eclipse, crx, neons. You name it i have beaten it. The corolla holds the points championship for 2 years ago and 2nd in points this year. I am looking for a bump of about 400-500 RPMS out of my straight away so I dont have to shift into third. I am going through transmissions,HD Clutches and flywheels like a kid eats candy. My motor can handle the more hp. I just need help figuring out how to take the rev limiter off.

Thanks


Also to add, I have been to several places who program High Performance ECU's and they told me its not possible for this car.

[PhatRoyale]

Any pics to share?

[BoyYota]

Wouldn't switching to an aftermarket computer system work? Megasquirt?

[gmotorsports]

I have thought about a piggyback system or an aftermarket computer system, however it would be way cheaper to snip a few wires.



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[JDMprizm]

Originally Posted by gmotorsports

I have thought about a piggyback system or an aftermarket computer system, however it would be way cheaper to snip a few wires.

[IMG][/IMG]

^ HELLAFLUSH!

Based on your knowledge of cars, you should know how, right? I have little to no experiance here, but if you can't figure it out, idk if it can be done Bruce:

[Bitter]

Originally Posted by gmotorsports

I have a built motor from the oil pan to the valve cover. I short track asphalt race my 94' corolla. Believe it or i beat on a weekly basis, civics, integras, eclipse, crx, neons. You name it i have beaten it. The corolla holds the points championship for 2 years ago and 2nd in points this year. I am looking for a bump of about 400-500 RPMS out of my straight away so I dont have to shift into third. I am going through transmissions,HD Clutches and flywheels like a kid eats candy. My motor can handle the more hp. I just need help figuring out how to take the rev limiter off.

Thanks


Also to add, I have been to several places who program High Performance ECU's and they told me its not possible for this car.

Correct mostly, the 7A ECU is NOT flashable or chipable at all in any way. there is however a small electrical component on the main board which can be replaced which raises the rev limiter. I'm not intimately familiar with it though.

keith.goldin.co75@statefarm.com try emailing that fellow, the email is a few years old but he may be able to do what you're looking for, tell you how, or point you to someone who can.

However its not without its problems, you will need a piggy back unit since it does some other technical stuff. Google 'repsold crystal mod' and you'll find a bunch of information.

[cipher93]

Originally Posted by gmotorsports

I have a built motor from the oil pan to the valve cover. I short track asphalt race my 94' corolla. Believe it or i beat on a weekly basis, civics, integras, eclipse, crx, neons. You name it i have beaten it. The corolla holds the points championship for 2 years ago and 2nd in points this year. I am looking for a bump of about 400-500 RPMS out of my straight away so I dont have to shift into third. I am going through transmissions,HD Clutches and flywheels like a kid eats candy. My motor can handle the more hp. I just need help figuring out how to take the rev limiter off.

Thanks


Also to add, I have been to several places who program High Performance ECU's and they told me its not possible for this car.

Wow, I never knew there were people who short tracked japanese compacts, much less these cars. Awesome car!

[Bitter]

I forgot to ask, what all has gone into the engine? What kind of cams are you running?

It may actually be easier for you to swap in a trans with different gearing...

[topnotch]

you can try megasquirt or greddy ultimate ECU management so that you can use higher revs, especially if you have installed performance cams and adjustable cam sprockets.... as for eating up trans/clutches/flywheels, all i can say is upgrading those to take the beating will put a hault to those problems