Mr2 Turbo delimiter

[woz_106]

I've recently purchased an MR2 turbo, however it is still limited to 112mph.

could anyone tell me whats involved in removing this as I'm going to be using the car on trackdays.

Regards

Warren

[Stef Derner]

It depends on whether the car is a rev 1 or rev 2 and later.
The rev 1 is a mechanical speedo.
Rev 2 and later are electronic and much easier to convert to mph and delimit.

[woz_106]

what a school boy error it's a rev 3

got it done a couple of weeks ago anyway mate, many thanks for the reply though.

[swaggansway]

stef, just out of curiosity how do you delimit a rev1. my speedo never worked but now it is I guess the limiter will work again

[Steve Horrocks]

Rev 1/2's usual have a little gearbox type reducer fitted to the speedo cable that reduces the input to the dash but the ratio of KPH to MPH (0.62) which in turn raises the point of which the dash sends signal to ECU. Or iirc, you can get a signal clamp to fit from the signal wire to ecu, but then you'd still have a KPH dash.
Another point is, using the speedo converter, raises the point for the power steering assistance cut of to around 80mph iirc, meaning you will have steering assistance at motorway speeds, but think you'd just get used to that!!