Alfa Dave's Twin Spark Project

Twinspark running on Motorcycle Throttle Bodies

---

I got this idea when I was looking at a post a while back from a post on the Alfabb.com
I found size and other info on a Mega Squirt site.
I bought a set of GSRX 750 throttle bodies from a 2002 Suzuki .
I got them from ebay for $75.00
I used the Alfa intake, Injectors and fuel rail so the bodies do only air .

This is what I started with.
The bodies come apart so I made spacers out of tube and put then back together with threaded rod to match the Alfa spacing.

This is the bodies sitting on the Twin Spark manifold


And this is what I ended up with.
The rubber boots are standard Alfa parts.
You can see the first 3 Injector holes are plugged with bolts and the right one has a port for my brake booster.
The gold thing at the right is the TS Hammering Damper.
You can also see the throttle position sensor (black thing at the right).


Here you can see the map sensor at the bottom left and the air temp sensor in the center.

This part converts the push of the car's linkage to the pull of the throttle bodies.
This took more time than any other part.
I used the TS plenum support and got an adjustable throttle rod and a ball stud from Max at Alfaholics Classic Alfa Romeo cars
The cable is held by a nut and bolt from a spica car.
You can't see it here but the arm rides on a nylon bushing.

Well that's it for now . More to come.

__________________
David Munro
Toronto ON
1969 Spider JR Twin Spark