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RT Dash2 Finally Wired
Mr C - 9/4/12 at 10:33 PM

Finally finished installation of the Dash 2 all bar a little tinkering with the laptop for the speed and boost reading. Quite a mission to install if you can't plug into an ECU, worth the hassle though. Switches are wired with resistors and diodes to be dimly lit with side lights then bright when activated as a tell tale.

What have I learn't

If wiring isn't your forte don't make it hard for yourself, I did!!

Check the value of resistors before installing, anal retentive bof at Maplin doesn't always get it right.

jeffw - 10/4/12 at 05:25 AM

Looks like a nice install. Very similar to mine

I've been playing with getting boost pressure from the ECU and it is giving some odd readings. Which ECU are you using?

Mr C - 10/4/12 at 06:59 AM

quote:
Originally posted by jeffw
Looks like a nice install. Very similar to mine

I've been playing with getting boost pressure from the ECU and it is giving some odd readings. Which ECU are you using?


Hi Jeff

I've used RT's own air pressure sensor, and the equation they gave it reads about .0.2 -0.3 with the car static and it does seem to be a little bit all over the place I'm going to check with them today to see if I've missed some thing.

beaver34 - 13/4/12 at 12:40 PM

looks good, just finishing mine off just got fuel level to sort mine is running into omex 600 and i also want to boost level what ecu are you running jeff?

is it a case of it varying too quickly or giving false readings?

Mr C - 13/4/12 at 01:44 PM

quote:
Originally posted by beaver34
looks good, just finishing mine off just got fuel level to sort mine is running into omex 600 and i also want to boost level what ecu are you running jeff?

is it a case of it varying too quickly or giving false readings?


The dash is not connected to an ECU as I'm currently runing a sttandard subaru one at present. I'm using an RT air pressure sensor with the provided equation. It doesn't seem quite right to me as I thjought it should read negative pressure then go postive as the boost rises. I will not be able to tell really until I road test it under a sustained load then I'll be able to see what it does.

Mike

femster87 - 13/4/12 at 02:42 PM

Hi Mike,

Why don't you write the equation down and then derive another one with the X & Y table plot. And see if they are the same equation. Sensor specifications are on the race tech webpage. I have had some issues with my pressure sensors but yesterday it worked properly. it has been a loss connection all along. I also dampened the display by averaging alot more reading. So I get an average over a period of time. Not the instantaneous reading. This has made it more stable

[Edited on 13/4/12 by femster87]

Mr C - 13/4/12 at 03:36 PM

quote:
Originally posted by femster87
Hi Mike,

Why don't you write the equation down and then derive another one with the X & Y table plot. And see if they are the same equation. Sensor specifications are on the race tech webpage. I have had some issues with my pressure sensors but yesterday it worked properly. it has been a loss connection all along. I also dampened the display by averaging alot more reading. So I get an average over a period of time. Not the instantaneous reading. This has made it more stable

[Edited on 13/4/12 by femster87]


Thanks Femster I've turned the sampling rate up, though will do it some more to dampen it right done. I'll check it out under load eventually it will probably be ok perhaps its more about my unfamiliararity with it that is the issue. I was expecting it to read negative pressure on tickover which it doesn't seem to.