180km/h speed cut

[mr2--mad]

When rolln down a big hill at 180 km/h my car starts choking,and goes dat dat dat. The speedo goes to 260! I wanna see if it gets there. How do I fix this? i tryd seaching the forum but no luck. thanks

[Silent Knight]

You want to see if your car can reach 260kph?

The answer to that will be no.

[Punter]

my car.... goes dat dat dat.

You have a rotory MR2???

Also, why don't you search. I know you said you did, but its bloody easy to find that out.

[MrOizo]

which track you trying this on?
dont many with a big enough hill to get much past speed cut.

[mr2--mad]

I just wanna know if any ones knows how to disable this "awesome" toyota feature please Ive been seaching for four hours what key words do you use punter?

[Caveman]

sounds like speed cut, but I dont know anything about mr2s so dont know how to fix it. What year and model is your mr2?

[Chickenman]

which track you trying this on?
dont many with a big enough hill to get much past speed cut.

I used to hit speed cut about a 1/4 of the way down cove straight in the 2... and that was stock.

[Jebus]

Oh FFS

Somebody spare me, too 4.8 seconds to find.

I serached '3SGTE Speed Cut' selected 'Search For all terms'

Wallah a thread called 'Speed Cut' Pops up.

viewtopic.php?t=48786&highlight=3sgte+speed+cut

Who wants to touch me?

[Silent Knight]

Speed Cut Defender...

Cheap and easy...

[mr2--mad]

OK thanks heaps i ve got the threads now !! you might aswell spell it out for me silent knight because, IM a KOOK speed cut defender from ?where?

[Silent Knight]

http://www.hksusa.com/products/?id=781&rsku=5546

That's only the HKS unit.
Heaps of other brands available...

[RomanV]

From the ever informative Fivebob:

Here's a < $5 speed cut that works for 3S-GTE's and should work for most other Toyotas

Get a 4024 I/C from Dick Smith ( http://www.dse.co.nz/cgi-bin/dse.storef ... View/Z5624 ) then connect as follows;

Pin #1 -> Speed Input ( From Speedo ?)
Pins # 2 & #7 -> Ground
Pin #14 -> +5v
Pin #12 -> Speed output (to ECU)

Cut the speed input to the ECU and put this I/C inline and it should solve your 180km/h problems

Although since this makes your ECU think that you're going half the speed that you're actually going, powersteering settings, ABS etc may get a bit messed up?

I'm not sure if the PS and ABS run from their own circuitry though, or if the ECU controls them...


For example, PS normally 'turns off' at about 80kph IIRC, now it wont do the same till you're going 160kph. (assuming it runs from the same speed output that the ECU recieves)

And BTW, 260kph is just a tease, you'll run out of gearing and/or power to go any faster by ~245ish.

[quicklvn]

Mate I don't know why you want to try and get to 260kph.

It is very very very very (is that enough very's lol) dangerous.

I have done it with my mate in his WRX (and yes I now realise how stupid and dangerous it is).

You get tunnel vision and any wrong move and you are gone (dead or worse killed someone else)

We did it on the motorway in the middle of the night and theres only one thing to describe it........ .

So I wouldn't recommend it to anyone. Save it for the track.

[fivebob]

Although since this makes your ECU think that you're going half the speed that you're actually going, powersteering settings, ABS etc may get a bit messed up?

I'm not sure if the PS and ABS run from their own circuitry though, or if the ECU controls them...

The ABS uses the speed sensors in the wheels so it's not affected. Not sure where the PS get's it's signal from, but it doesn't use the output from the ECU (still works ok with my Motec) , so wouldn't be affected by this mod, provided you put the I/C on the ECU and not the wire coming from the speedo. The only ECU -> PS signals are to do with letting the PS know that the engine is started or that it is idling.

For example, PS normally 'turns off' at about 80kph IIRC, now it wont do the same till you're going 160kph. (assuming it runs from the same speed output that the ECU recieves)

The PS turns off at about 140-150kph, and (at least the later models) progressivly turns down the assist as the speed rises. Lots of people have done this mod and no one has reported any problems with the PS staying on.

[mr2--mad]

found one in the city now to find all those wires!
How did you get rid of your speed cut RomanV?, and hows the new afr??
Not so Quicklvn

[Dell'Orto]

And BTW, 260kph is just a tease, you'll run out of gearing and/or power to go any faster by ~245ish.

The speedo may make it there though, depends on how inaccurate it gets up at the top end.
FTR, on Gen 3 15"s I managed to redline mine in 5th gear on Pukekohe, which I worked out to be ~250kph. Its very light at those speeds

[mr2--mad]

So......what colour is the speed input to the ECU? and What colour is the speed output from the speedo? Can you recommend a electronics wizz in auckland to do this for me? (payed of course!). Ill supply the bin counter 7 stage rippl and the loom for them to hack into,

[fivebob]

What Part # is on your ECU?

[mr2--mad]

Aghhh its to worn to make out ,its the number in the red backround, right?

[mr2--mad]

3sgte 09661------.If I took it off the boot, would it be on the underside? oh well ill look any way .gen 2 lsd ct26