how to remove limiter?

[lly1982]

i heard that i can convert my speedo from kmh to mph and also remove the 112mph restriction, what will i have to do?

[ci5ic]

Originally Posted by lly1982

i heard that i can convert my speedo from kmh to mph and also remove the 112mph restriction, what will i have to do?

Well, you can buy a USDM guage cluster in mph I suppose... As far as the limiter, I wasn't even aware that we had one in our cars. I've buried the needle in my hatch several times without hitting a rev limiter or speed governor...

[bambam89lx]

well, they sell chips on ebay that replace ur rev limiter. But, they let you rev above the fuel cutoff point not remove a speed governor. We don't have a speed governor as I'm aware of. As Ci5ic said, I've also dropped the needle past its final mark. It would be impossible to reach the potential speed of the dx. Theoretically, the dx tranny can do over 150 mph, and the si tranny can do 125 mph. But, you'd blow ur engine b4 u reached 150 mph in 5th gear on a stock dx. I don't suggest trying to remove ur Rev Limiter. I've seen so many guys blow their engines like a week later from revving over like 8 or 9k on a dx engine. Why would you want to do that anyway? There isn't any power being made after like 6k. It's stupid if you ask me. Your question this week is "how do I remove my limiter". Next week it will be "how do I remove my engine" because you blew it up.

[QuikShifter]

Originally Posted by ci5ic

.... As far as the limiter, I wasn't even aware that we had one in our cars. I've buried the needle in my hatch several times without hitting a rev limiter or speed governor...

Same here, do we really have speed and rev limiters? ? hmm! I guess I must have overshot mine then, lol!!

[QuikShifter]

Originally Posted by bambam89lx

well, they sell chips on ebay that replace ur rev limiter. But, they let you rev above the fuel cutoff point not remove a speed governor. We don't have a speed governor as I'm aware of. As Ci5ic said, I've also dropped the needle past its final mark. It would be impossible to reach the potential speed of the dx. Theoretically, the dx tranny can do over 150 mph, and the si tranny can do 125 mph. But, you'd blow ur engine b4 u reached 150 mph in 5th gear on a stock dx. I don't suggest trying to remove ur Rev Limiter. I've seen so many guys blow their engines like a week later from revving over like 8 or 9k on a dx engine. Why would you want to do that anyway? There isn't any power being made after like 6k. It's stupid if you ask me. Your question this week is "how do I remove my limiter". Next week it will be "how do I remove my engine" because you blew it up.

Ive pegged my clock well over 120mph@4800 rpm in 5th without any problems. I wasted this GSR on the freeway and we later met up at a rest area and said that he was doing 130+ and still couldnt catch-up! But I also had a 3" greddy catback that was out of a turbo HB, so when I went back to 2 1/2", I was struggling just to stay on top of 115mph. And look what happened to my baby now! Blown head !!!

[91civicDXdude]

seeing as how this person's speedometer is in KM and not miles, im guessing they're probably not from the US. some cars from other markets have speed limiters in the ECU. There are a couple ways you can disable this.

1. chip the ECU. many people (myself included) make custom chips for PM6/PM7/PR4/PW0/PR3 and some OBD1 ECUs, and a simple chip will remove the speed limiter, and also you can have the rev limiter adjusted to your specs.

2. piggyback device. The Field SFC-VTEC is a simple fuel controller that also has the effect of removing any speed limiter from the ECU. It doesnt change rev limit, however.

If you happen to have a DPI vehicle, (DX, Standard, or CX in some markets), then option 2 is the only way to go. the PM5 and PM9 ECUs cannot be chipped.

[lly1982]

i've got a jdm ef9 sir civic, so being that the car is a jap import it will be restricted to roughly 180km that about 112mph. how can i remove the top speed restriction?

[91civicDXdude]

read the above post...

[travagliante]

I heard the exact same that we had a 112mph limiter in the gauge cluster and when you hit that it cuts off the ecu till u slow down to like 10km an hr. or somethin?

[bambam89lx]

Originally Posted by QuikShifter

Ive pegged my clock well over 120mph@4800 rpm in 5th without any problems. I wasted this GSR on the freeway and we later met up at a rest area and said that he was doing 130+ and still couldnt catch-up! But I also had a 3" greddy catback that was out of a turbo HB, so when I went back to 2 1/2", I was struggling just to stay on top of 115mph. And look what happened to my baby now! Blown head !!!

I was just simply stating that it would be impossible to reach the potential speed of the dx. You can do 125 MPH in 4th gear and like 160 mph in 5th gear. But there's no way you can get to that speed. Your engine would blow up along with ur tires before you ever got to that speed. Maybe you were doing 130 MPH but it must've took you about 15 minutes to get up to that speed. Try maxing out 5th gear. Can you do it? NO. You can't. And i highly doubt you "WASTED" a GSR on the freeway, let alone anywhere else. Was some old man driving his GSR in the slow lane and you drove by him so that entitles you to say you "WASTED" him?....lol. A GSR puts down over 140 HP to the wheels and ur car is putting down barely 70 HP to the wheels. I don't care what mods you have, you didn't WASTE a GSR. Also just to let you know, that 3'' piping you got isn't doing you any good. There's a reason that it was meant for a Turbo civic because it needs room for the higher airflow produced by the TURBO. Even then, unless that civic was producing over 300 HP, he wasn't doing himself a favor with that tubing either. You think bigger piping is better? Why not just get a 5'' straight pipe all the way back. Better yet, Why not just remove all of ur piping. More HP right? WRONG. You wouldn't be able to even start your car. I'm surprised if you can even start ur car now or that your not stalling at red lights. If you think you can beat a GSR, come on down to G-town and I'll show you how mistaken you are. First, I'll you up and down then i'll let my boy Ray (masta on these forums) race you. He'll show you what it looks like to "WASTE" a GSR. Sorry for being such an @ss. Its just, you see, you need that back pressure. Here's a little formula for you:

Your exhaust piping is supposed to be 1 sq. inch for every 60hp. So a setup capable of supporting 240hp would require 4 sq. inches. 4 sq. inches is only equal to 2.25" piping. I really don't understand why some people want such huge piping on a 1.5L or 1.6L.

[91civicDXdude]

im sorry, but you do not need backpressure. do not argue. you are wrong.

[bambam89lx]

wutever you say. go ask on honda tech you newb and watch how bad you get flamed! That formula I posted is a proven formula and no you don't need a 3'' exhaust with an N/A setup like he is running. He is losing so much torque and HP with that setup on HIS car. 3'' is WAY TOO BIG on a 1.5 or 1.6L. Technically, backpressure isn't the right way to explain this. You need an exhaust that is free flowing and not restrictive. BUT, that only works upto a certain point. After ur exaust becomes too big for you N/A application, the exuast gases do not have a chance to exit or be pushed out which causes ing gases. Backpressure is actually good (2-6psi) in his setup because it helps exhaust gas scavenging and smooths out exhaust pulese. The only case where no backpressure at all is a good is with a turbo application.
It was even written about in Sport Compact Car Magazine. The actual numbers were:

1,500cc - 2,000cc = 2-inch
2,100cc - 2,500cc = 2.25-inch
2,600cc - 3,000cc = 2.5-inch

Backpressure is bad on a turbo civic where you need an open flowing exhuast sytem. Like I said, why not just remove ur whole exhaust? No back pressure right? Try it and then tell me how ur car runs...
go here:
http://honda-tech.com/zerothread?id=185545
then get back to me when you are better informed about backpressure.

[91civicDXdude]

you are the noob man. BACKPRESSURE IN ANY FORM IS BAD.

if you werent such a flaming noob, you would understand the difference between exhaust gas velocity and back pressure.

back pressure is a force acting against the exhaust gas WHICH IS NEVER GOOD.

high exhaust gas velocity is what you want. using too large of an exhaust will cause low velocity which hurts performance, but it is in now way related to the loss of backpressure. I will agree however, that 3" exhaust is overkill on a 1.5 or 1.6 NA

dont flame when you're the flamer.

idiot.

btw, honda-tech doesnt know all.

btw pt. 2.... your "proven formula" isnt proven at all. my brother and i went to the track. he had a 91 STD hatch with a d16z6, zex 59300 cam, DC 4-1 header, and a short ram intake. 1/8 mile track....

his first run, 2.3 60', he ran a 10.2. OMFG THIS WAS WITH A 2" EXHAUST WHICH IS PERFECT RIGHT SMARTEY MAN?

well he removed the exhaust completely by removing the catalytic converter.

next run... 2.3 60', near identical launch, near identical shifting... he ran a 9.7. well, looks like a 2" exhaust was too restrictive. what a surprise

this was repeated once more with cat, once more without with *very* similar results.

after we went home, the next day, he fabricated up a 2.25" exhaust on the car. the next time at the track, he ran a 9.7 with a full exhaust.

the moral of the story? stop reading books and get some real life experience, NOOB.

[91civicDXdude]

oh wait, i also just noticed your "gutted cat" mod. since you are the exhaust genius around here, maybe you should realize that gutting a cat creates a pressure difference in exhaust flow. basically, a RESTRICTIVE PRESSURE DIFFERENCE. maybe if you werent so busy calling other people noobs while exhibiting that behavior yourself, you would learn something.

[bambam89lx]

Originally Posted by 91civicDXdude

btw, honda-tech doesnt know all.

But you do?

Originally Posted by 91civicDXdude

btw pt. 2.... your "proven formula" isnt proven at all. my brother and i went to the track. he had a 91 STD hatch with a d16z6, zex 59300 cam, DC 4-1 header, and a short ram intake. 1/8 mile track....

his first run, 2.3 60', he ran a 10.2. OMFG THIS WAS WITH A 2" EXHAUST WHICH IS PERFECT RIGHT SMARTEY MAN?

That is one case. Why don't you hop on a dyno and post it up? If you need me too, I can find numerous dyno sheets on the web testing this theory that will prove you wrong just say the word.

You don't know me, in which case I do speak from experience. But, wutever you say...proven formulas are labeled as such for a reason. I'm not going to argue with you any more. It's pointless. Ur the type of person that is a know it all and I'll just end it at that. Ur right. Have a nice day.