ncirom2003

iTrader: (7)

ok ive been wanting a cheaper less headache route than the ems. i was looking at the ecu wiring guide in the DIY articles on here. connector E seems to be more of control system wires. so im looking, pin 1 is the immobilizer fuel pump relay. im assuming this is what the ecu grounds out (thats waht the ecu does, it doesnt supply voltage to things it grounds their circuit) this pin to disable the fuel pump when you hit 115mph, so im thinking of trying to disconnect this wire and going for a test drive to see, but it takes like 5 days to even hit 115mph and my cars in the shop for a while.

now before you reply NO, look through the article here http://www.7thgencivic.com/forums/sh...d.php?t=155306 , and look at it considering how it works and possible other uses for this.
and if you know something i dont about this and my thread seems retarded i apologize.

gangrel138

Let me know when you get your car back if this works. I've been dying to get over the governor and really play on the autobahns.

ncirom2003

iTrader: (7)

lol well im putting in a turbo and i dont plan on breakin mach1 but 120 would be nice once in a while. but a disadvantage(if it works for this too) would be losing the rev limiter for most, although i would gain hp from that cus of my camshaft. just have to keep an eye on them.

please, anyone else have an opinion or idea.

dre2600

Just to be concise, the Civic has no speed limiter, I have gone over 115mph in my 2K3 Civic, its all based around the rev limiter.

jerseydetailer

yeah i was thinking that 2....theoritically there is a limit...but that would be your dependant on your tires size and you gears...the gearing on the civic would be the only thing that could really limit you top speed...but if your talking bout 1/4 mile it would matter

gangrel138

No. The EX has no governor. For all other models there is an electronic governor that cuts off the fuel pump. The sudden lurch during acceleration is not very nice and I'd really like to be able to keep up with the BMWs and Audis out here.

stinkypie

This is what I thought as well. Wasn't there someone who claimed to hit 143mph in their stock EX coupe?

04|5spdCivic

my friend has a chevy s10 pickup, and he hooked up a switch to his cluster or somthing in his dash and when he flipped the switch off (cut the power to his cluster) his mph, tach, and everything went dead, but the truck continued to pull and everything else works fine, ie. power stearing, brake booster all that engine stuff he had no rev limiter and no governor when the cluster was off. i dont know if this would work for our cars but it worked for him. he couldnt get past 95 before, and now he blows by me at 120+

jerseydetailer

yeah but ppl dont seem to understand that just because your speedo reads 143 doesnt mean your actually driving that fast..ppl claim stuff like this all the time i mean a car with 127whp with the weight of a civic, the physics make it impossible to hit that speed.....it kills me when ppl claim to go this fast in 5th gear and anybody who tries to max it on the street is an idiot:when i used to ride motorcycles some of my friends hit rediculous speeds so fast that they actually outrode the tailights but i was to much of a punk to keep up

dre2600

I hit 220km/h in my Civic Si (Canadian) coupe in Death Valley, going downhill, with a tailwind, on an empty stretch of road. I think thats 137.5mph, prior to that, it topped out almost always at about 180-185km/h, it'd just sit there and not move. It was a really odd day I guess.

ncirom2003

iTrader: (7)

no there is a speed limiter, and its nothing to do with rpm limiter since its not at redline at 115mph. so once again anyone else.

i highly highly doubt it would work for our cars and i also doubt thats how it actually worked on his but w/e i dont care about that.

RedBull

iTrader: (1)

it'd be cool to see if the limiter could be disabled.... when i was stationed in Germany... i was on the Autobahn all the time hitting the limiter when i wasn't paying attention. Acouple times going down hill... i would push in the clutch and get to around 117 before i had to back down and push the gas. Really would have been nice to disable it while i was there.

ncirom2003

iTrader: (7)

i think what we need is someone with the ems to post a link to the connector pin identifications, then we can compare possibly being able to play the elimination game and see if this pin does what we think it does.

Hawaiian_Built

Give or take some depending on your tire size...but basically a rough estimate...A 04 civic dx (my car) weighs 2400 lbs. and a 94 civic hatch w/ a B16 (eg my friend owns) weighs 2280...120 lbs difference.. and i have been in the car with him and he has hit 150 easily...and a b16 is somewhere around 135-140Whp so i dont see the PHYSICS in that one either...my TEN cents

stinkypie

I hit 123 without any problem and quite a bit left in 5th. I'm completely stock, so I dunno.

jerseydetailer

according to what the speedo cuz we all know how accurate oem gauags are if you ever install any aftermarket gauge in the car you will understand what i mean.....until you been clocked at that speed then at best you thought you were going that fast...relying on the factory speedo doesnt cut it...to makes things even worse if you have bigger rims theirs speedos are even more off cuz of the diameter change

jackburton

iTrader: (1)

U.S. Lx has a 115 mph speed govener, someone said you can foaster in 4th, but I dunno. U.S. Ex has a govener at like 130 mph. You cannot get much faster than that any ways.
With the gears in the civic you hit the rev limiter at 150 mph, even with out the govner, euro. I have seen a vid of some guy overseas doing so in a boosted civic, I think it was an lx, a1, but not sure.

jerseydetailer

flame me all you guys want, i dont see how it is possible for a civic without a turbo or juice to hit speeds in excess of 110...between trying to maintain traction, aerodynamics, drag and street conditions i just dont see it....even if it can.....not the smartest idea if you have a stock suspension or stocks brakes, or low rated tires but hey what do i know

Ser1N

iTrader: (4)

I hit 125 give or take in my 1998 civic hatch 1.6l =)

jackburton

iTrader: (1)

I have hit like ~125
Yeah it really is not smart(dumb), but only did it a couple of times.
I do not htink my speedo is off that much, civic > 110mph, definitely.

Kyle23

143? yes. Stock? no fukin way.... It was turboed and there is a vid on here somewhere.

Stock EX's can do 127 mph but it isnt goverend by speed. Its governed by the revlimiter at 7300rpm which is why if you have enough power you can hit 143 mph.

Stock the EX cant go any faster cuz it doesnt have enough power to keep the car accelerating

not sure what to do about having the LX govern on you though.... I would think that u r on the right track though with the wiring

scansel912

iTrader: (4)

I'm fairly confident that the EX does not have a speed limiter. The only thing that limits the speed is the physics and the 7000 RPM fuel cut off. One member on here hit the button in 5th gear (NEVER do that BTW if you have nitrous) and reached 135 easily and still had plenty of RPM to go. If there is a fuel cutoff at 125 like most people say, why didn't it cut him at 125 or 130 even?

Ser1N

iTrader: (4)

My friends EX cuts off at 127 or so with like 3k or somthing left on the tach.~

Kyle23

not unless its an auto... w/o doing the math at 127 it should be at 5500 rpm. How do I know this? cuz I'm at 4k at about 80 in my 5speed

Ser1N

iTrader: (4)

it is an auto =P

ncirom2003

iTrader: (7)

ahem, everyone stfu! this thread isnt for a kindergarten argument about speedo accuracy and hp potential. its a question about disabling the speed limiter, im not asking how fast you can go or if your limited, im asking the people who would have an idea if they agree that my theory would work.

scansel912

iTrader: (4)

Yes but we havne't even established if all the cars have speed limiters. Whats the point on asking how to disable something that is possibly not even there?

Ser1N

iTrader: (4)

I can go to 38MPH in first, 69 or 70 in second, 99 in third and 126 or 128 and it cuts off ~~and i stil have a bunch of RPMS left =P so mine does!

paradoxblue

iTrader: (1)

from wut i understand its a rev cut off simply. in an auto they have the speed cut off's
how do i know this?
i can hit 180k on a flat surface pretty solid according to the speedo. on a downhill i topout at a bit more then that before i govern and on an up hill i govern a bit bellow 180

so explain to me how my speed limiter changes according to the angle of my car? unless honda has some pretty seriouse gizmo's int here lmao.


its a rev limiter plain and simple.

You have the right idea. it sa simple switch to say "shut off fuel pump" now two questions. is this a seperate wire that tells it to shut down. or something that tells the cars brain to stop pumping gas. cause its two different methodes.

if tis a seperate line then its simple to find said line and create a break

BUT if its int he cpu. I.E. the cpu in the car is reading the rpm gauge and is also running the fuel pump is coded to decide at a set rpm to shut down the fuel pump. the only way around thi i can see that is simple would be to find teh RPM sensor and isntall a switch to disable it completely. which would do two things.
one kill your tach int he car,
two stopt he cpu from also reading it. which MAY cause some errors.

now at that time. figure out how it sends the signal.. does the rpm sensor send a voltage to the cpu which then tells the cpu by the voltage +/- how fast its going. make sense? kind of like a meter.
if it does it this way. fidn out what voltage it sends at 7000rpm in 5th cause they should all be a diffrent source soo.. um how can i explain this

in 1st at 2000rpm you cars rpm sensor is sending a 1.2vdc current tot he cpu so the cpu says OH ok thats this speed displays this rpm to you and calculates etc.

so in 5th once u hi the limit. say 7000rpm its sending a 11.3v signal?
install a switch with a proper resistor.
so its sending 11.2 about to hit the 3 to kill the pump, but you click on the resistor. knocks that source back a few numbers and bam your internal rpm is way off BUT your cpu is also readin something wrong.

if i could find the wire i could test this theory myself. it may be a resistor and nothin more lol

***the above information is exactly that. and is jsut my thouht process over this discussion using my knowledge that i ave aquired. i have no degree or other bs so this is just a few possibilities. i may be right i may be way off
thought i'd toss it out there

find the RPM sensor and you can killt he govenor. one way or another

RedBull

iTrader: (1)

I'd like to know about this... being able to actually work. Cause i should be swapping the cylinder head in sometime next week... with the EX ecu, vafcII, and all... would be nice to do the wiring while i got it all out.

BTW: i have the ecu pin layout... but don't have the ems... that's if your looking for it.