Speed limiter cut
 

I have a JDM 2000+ series 8 FD3s. does anyone know which pin in the ecu is the speed limiter? got a device for removing the speed limiter but the manual doesnt say where it is, and also all the rx7 manuals i have downloaded is for the series 6 FDs

do fd's even have a speed limiter??

yep

cuts off the engine at 180km/h, well the jdm speedo only goes up to 180km/h, where as the local ones have 300km/h speedo

180 km/g thats only 111 mph that cant be right i 140 was my max (afraid to go any further)

i've gone 165 :) but PFC FTW lol

i hate when ppl say FTW i really do...

sorry to sound like a noob, wat does FTW mean?

and yes, its definately 180km/h max.. i've maxed it out and it stops the engine going any further, on a track of course... no hooning around the public roads for me.

so does anyone know where the speed limiter wire is located on the ecu?

I don't know what FTW is as well lol. On the ECU, in the passanger side, there should be a green and white wire I beleive... cut that and your free.

ftw = for the win

You need a top speed delimiter :

http://www.thor-racing.co.uk/Top_Speed_Delimiter-48.asp

Can I control this with FC-Datalogit and PFC? 180 km/h limit is annoying, but I've never reached it (I have JDM import).

i got an apexi rsm, its got a function that allows u to increase the top speed to more than 180km/h. and also shows speed and rpm... pretty useless, but its the cheapest device i can find that gets rid of the speed limit.

but i just gotta find the wire to cut and connect onto the rsm.

I just cut the limiter wire off the ECU...

Euro models do.


https://www.rx7club.com/3rd-generation-specific-1993-2002-16/taking-speedo-dash-out-delimit-j-spec-fd-584497/

I have the same things and couldnt get it to work so I just Cut the green/red line or pink on the apexi rev limiter that ran to the ecu from it, and it will go untill it runs out of power:) I had to do the same a few years back though I cant remember which thread it was but ill keep looking.
Sean

Eureka https://www.rx7club.com/showthread.p...hlight=jdm+ecu

Just cut the speed limiter wire off...

Hey guys, well I dont mean to flog a dead horse by re-visiting this issue/thread but I have a JDM 1992 FD. I took her out and tested the top speed and it seemed to top out at 180kph. I have searched the forum and found there is a wire that I can cut by the ecu. There is also the option of having a plug in ecu, I have a PFC (i had this same PFC in my last FD, no speed cut) but I was wondering if the ecu should automatically disarm the 180 cut or if you have to tell it to. I can just cut the wire but wanted to know peoples thoughts on this sensitive issue. I dont want to go cutting wires if I do not need to.

FTW = for the win.

i didnt know that the euro models had speed limiters on them i thought all were drag limited depending on the power of the car.

you learn something new every day

No they dont, only JDM.

Just cut the wire.

Attachment 719759

Ok I will cut the wire. I guess I was just wondering if the pfc would eliminate the need to cut it even with the stock settings.

is it bad for the engine or stock turbo's to exseed 180k's? i wouldn't think so since mine's the middle of 4th gear, it just gets to 180 way to fast to top out at that. Also would the needle on my cluster keep going past the 180 mark an break once it gets to the resting pin at 0?

no and no. Unless you are doing it every 5 minutes! the speedo just stops at 180 but the car keeps going. I had my last FD wound almost to redline in fifth gear,dunno how fast that was but it was DAMN fast!!!

Well no worse then any other car as long as it is in ok operating order , dont know on fds because i have a MPH gauge but my jeep i had maxed at 80 mph gauge and when i went faster just went on the black side of the gauge.
Get a Apexi rev/speed gauge you can up the speed cut w/o cutting the wire and at the least you can get a accurate digital reading of your speed or tach.

I cut the wire but the engine won't start !!! I ned to plug it back together to repair the problem ! But I saw that I need to cut THIS wire, is it true?

https://www.rx7club.com/attachment.p...6&d=1122286149

I tried cutting the green & red wire behind the speedometer, without success ! What do I need to do to remove the speed limiter !?

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On my car its was pink, connected to the apexi rev/speed meter.

I tried cutting 3 pink wires at the ECU, without success...

STILL SEARCHING...

awwwwwwwwwwwwwwwwwwww, that sux.

You said it!

What year is your ecu?

yes, all JDM cars are speed limited at 111mph.

For the OP, it's hard to say which wire to cut on the 16bit ECU, there aren't many people with 96+ cars on this forum. Your best bet would be to ask a JDM RX-7 shop (RE-A, FEED, Scoot, etc), OR get a Knightsports FCD. They are cheap and they remove fuel cut as well as the speed limiter.

Yes but mine is 1992 FD3S...

ahhh ok, my info and I think most are for 99 up ecu's

Re-attach the wires, and get a PFC down the road maybe? Orr.. since your car's dead you can just donate it to me.

I did re-attach the wires... I can't wait to go to 200 km/h !

lol

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Have you tried asking the guys in the Far East section?

https://www.rx7club.com/far-east-forum-203/

Allll righhht!!! I did it! I was cutting the wrong wire! :lol: I did 210 km/h, at 190 km/h I feel a STRONG lack of power, this is strange!

Oh this is all okay, I reached 255 km/h and it was fine!

I have an 92 FD3S too, so please tell me the which cable must be cut off.?
If there are more cables with the same colour, could you tell us if its the, for example, 3rd cable from left or so?

thx
Andi

Attachment 719760

This is the right wire! Warning, there's two or three wires red and green, this is the right one. You absolutely need to unplug the yellow plug (the lowest or the highest, I don't remember which one of those two). Then, you'll see the famous wire.

To unplug the yellow wire, you need to push the button in the back of it, and to PULL HARD (Do not be scared to pull by the wires, this is okay!).

Man.... I feel bad for people who are just cutting random wires back there....

Hehe i didnt cut the wire so far, as you wrote, after reading the whole thread, i have a bad feeling about cutting wires too.
So i guess i will start at first with a redom ecu ( since they are cheap ) or better, with a pfc - but at first, my car has to run without problems.

thx
Andi

its the bottom plug of the ecu. i did this mod today and it worked fine!
im free of the limiter!
i also put a bullet connector on the wires for easy reconnection if need be at a later date!

it works on the 16bit ECU, too. i just tried it an my 97 model
2 days ago. but, the speed signal for my HKS Turbo Timer was
connected to this green/red cable and now it wont read any speed.

can i just ground this wire or is there another speed signal
i can tap my HKS into? i need the digital speedo from the
HKS to read speeds above 180km/h...