SPA Dash

[V8 Vum]

Anyone fitted an SPA dash with an LS7?

Sunday I connected mine up for the first time, but no revs! Ideas please?

Als ran my LS7 up to see if the fans kicked in, and they did but at 105 degress which is a bit high. and then an odd thing happened....

Turned the engine off, which was making a feint whistling noise, something I had not heard at lower temps. With engine off no sign of steam...totally quiet.

After a couple of secs, I started again - rough...and then caught...and sounded really strange/bizzare. It sounded like it was running backwards....Used no throttle but slowly climbing revs - so shut off in panic! Was it deiseling due to high temp?

Left off for five...started...OK/ normal??????

Ideas?

cheers

[spatz]

sounds like you have a lot of fun with your engine and ECU, the SPA dash should have a RPM input and the corresponding output you should find on your ECU.

[V8 Vum]

Yes..but then I am telling people what my experience has been regardless - I guess many keep their occassional supidity secret!

The LS7 has a white Tacho wire from the ECU and I was advised by SPA to connect this to the SPA tacho feed wire (Red). There are two other wires from the SPA dash in the same bunch - Green/Yellow and Black, and SPA said connect these to an independant ground which I did.....but no revs appear to be registering.

Any ideas ?

[spatz]

make sure you have a ground connection between the dash and the ECU, simple multimeter that can read ohm resistance or diode tester can tell !

[DHGTR]

Keith

I did send you a diagram for SPA dash connection with the trigger resistor. I'm running an LS2 but set up is the same.

Dave

[Happy Jim]

You'll probably need a pull up resistor if you're using a GMPP ECU tune (unless someone with the same ECU/OS has already done this, in which case go with their experiences).

Rgds

Jim