Newbee / rpm only

alsehendo34 · Post by **alsehendo34** » Tue Jun 13, 2006 9:18 am

Anybody ever leave out the map and TPS & run RPM only advance only like a centrifuge only distributor would? (For an old VW).

MartinM · Post by **MartinM** » Tue Jun 13, 2006 9:41 am

Yep - works fine....

I have a unit on a highly tuned Vauxhall Red Top that runs to 8250rpm on RPM advance only. It's a resonably long story why it doesn't have MAP or TPS, but it's fine without it...would probably be better with TPS though!

4600cc · Post by **4600cc** » Tue Jun 13, 2006 12:40 pm

Which parts would you then leave out of the unit when building? Just the MAP sensor, or other things too?

MartinM · Post by **MartinM** » Tue Jun 13, 2006 1:04 pm

All the components in the white outlined areas on the board (see the picture on http://picasso.org/mjlj/), i.e:
- all the TPS optional components (4 capacitors, 2 resistors, a diode and an inductor)
- all the MAP sensor optional components (the MAP sensor, 2 capacitors and a resistor)

Post by **brentp** » Tue Jun 13, 2006 1:24 pm

You could leave out the parts as mentioned below.. Or you could use a TPS provisioned unit, and instead of attaching it to a Throttle Position Sensor, you could have a dash mounted control that allows you to shift your entire timing advance up and down.

Each 'load' row of the ignition map could be slightly offset + or - from your base. Then you can drive around and do some rough tuning on the fly.

Brent

DannyP · Post by **DannyP** » Tue Jun 13, 2006 6:50 pm

I am installing my unit in a very hot type1 vw(2165cc, 170 hp), and built it with TPS. The Ford TPS off the Escort is easily adaptable to one of the throttle shafts on my Webers. I would suggest building it with TPS and then you could just not use it, it's only a couple dollars in parts........