Quick delimiter question

[PobodY]

I've already got converted clocks in my R, and I always assumed it had been delimited... until I went to the rolling road day and it stopped at 7000rpm in 4th gear.

So what I'm wondering is this; can I remove the limiter by simply cutting the wire which goes back to the ECU? (If that's the case, which one is it?) - The reason I ask is because I always thought the device is pretty simple; take the voltage from the speedo drive, drop it down, fool the clocks into reading 0.621 of the original signal... so the limit just goes to 180mph (which is a speed I'll never reach anyway)... However, maybe it's not as simple as I thought.

I've got a spare delimiter that came off a second set of clocks. It's one of the 5-wire type (part CK-UN-09; V109.02.04); Rev=+12V; Green=Earth; Yellow=Speed in; Blue=Speed out; Grey=ECU output - the grey one has been cut-off really short. That's what got me wondering if I can just take my clocks out and snip the wire rather than disconnect everything to wire-in the spare delimiter.

 

[dotalot]

The de-limiter chips only worked sporadically in my car. I tried a couple, sometimes it would limit and sometimes it would go past.
I fitted the ecu out of a UK motor to fix it, but im pretty sure it can be taken out of the jap ecu by someone who knows what they are doing.

 

[Trip]

I've already got converted clocks in my R, and I always assumed it had been delimited... until I went to the rolling road day and it stopped at 7000rpm in 4th gear.

So what I'm wondering is this; can I remove the limiter by simply cutting the wire which goes back to the ECU? (If that's the case, which one is it?) - The reason I ask is because I always thought the device is pretty simple; take the voltage from the speedo drive, drop it down, fool the clocks into reading 0.621 of the original signal... so the limit just goes to 180mph (which is a speed I'll never reach anyway)... However, maybe it's not as simple as I thought.

I've got a spare delimiter that came off a second set of clocks. It's one of the 5-wire type (part CK-UN-09; V109.02.04); Rev=+12V; Green=Earth; Yellow=Speed in; Blue=Speed out; Grey=ECU output - the grey one has been cut-off really short. That's what got me wondering if I can just take my clocks out and snip the wire rather than disconnect everything to wire-in the spare delimiter.

The ECU should be receiving the converted signal like the clock does. Probably there are different types of converters. I would not cut the wire going to the ECU.

On a side note, both the signal of the speedo and revs are NOT Voltage. They work on Frequency.

 

[PobodY]

Ah - that would explain why it's more complex than I thought... and why it needs the 12V feed instead of just a suitable resistor.

Yeah, it surprised me that the kmh clocks are reading in mph... but that the ECU still knows when I've hit 118mph (which would be 180kmh if I had 14" wheels on it). As I said, I would have thought it would limit the car to 180mph instead. - I'm uneasy about cutting anything, and the sticky in the how-to guide is for a 6-wire delimiter (and the pictures have the wrong colour cables and are too small to work off anyway).

 

[vss irvine]

ive never liked delimiter chips, we fitted an apexi rsm, as you can adjust your limit through it.

they are a bit pricey new, but can be picked up 2nd hand