george the greek

Hello, I had a custom inlet manifold made for a fiesta rs turbo engine with a Dellorto throttle body, the problem that I have is that the butterfly on the Dellorto turns the opposite way than the standard efi item which means my TPS is useless. What other throttle position sensor can I use? (the engine is on OFAB). Any body had a similar problem? How did you come around?
Thanx George

Caddyshack

Can you stick up a pick of what you have?


You may need to speak to Dave Walker at Emerald as he can solve a few things like that

haz87

Just reverse the wiring

george the greek

As you can see in the image below there is an arrow pointing the direction from closed to open, the potentiometer is actually one way and it wont go the other way so reversing the wires is pointless I think. What I need is TPS that turns the opposite way and also be in the Ohm range of the original I guess.......

george the greek

Caddyshack

Thanks for the pic. I assume you cannot take out the spindle and adjust the start point, in theory you need the butterfly out and flip the start point or put the tps upside down?

george the greek

Unfortunately the spindle cannot be adjusted

Caddyshack

A complicated way would be a gear on the output shaft that the tps would normally sit on and an equal gear meshed running the tps, this would reverse the moment / motion. But that would take a bit of fabrication. You could use Lego cogs from Lego technic mounted on some metal or even mocked up all on Lego and glue the whole thing together and maybe put metal over top. The Lego models they use at legoland are often just superglued together.
A watchmaker or gunsmith could copy it in brass I suspect.

Caddyshack

I bet if you can get the shaft out and turn it through 180 degrees it should work for you...it is hard without having it in my hands to play with.

Dave walkers website, I know he could solve it http://www.emeraldm3d.com/about-us

george the greek

I bet that there is a simpler way lol

Caddyshack

Just been googling dellorto and it seems they use the Webber alpha tps. I will keep reading a bit more and report back

Caddyshack

This looks interesting, might be worth calling them?

http://www.dellorto.co.uk/shop/dhla-...dhla-40-45-48/

Caddyshack

Ok, another idea. ...just weld another shaft on top at the correct position, surely you can cut the half moon off, flip it round 180 and re attach?

Caddyshack

The bottom pic looks like you have a tiled engine bay lol

george the greek

Tiles are much easier to clean !!