Bombus Speedshop

Bombus Speedshop
Wrenchin' without supervision since the seventies...

Friday, June 19, 2015

Bling

Some bling was required when the EFI made the mighty old shovel roar again.
Ladies and gentlemen, the Bombus Speedshop point cover.


First start

So finally the D day was up!
(Actually a while ago, in middle of April.)
I was so stressed so there was no thoughts whatsoever to film this moment.
But all thanks to my wingman Feeler Cycles this super stressed and confusing moment went in to eternity.
This moment is definitely on my top 10 adrenaline list.
But even if the engine went rough to say the least this first time my smile in the end say's it all.


Friday, May 22, 2015

System test

After all sensors was mounted and the throttlebody was done and tested, it was time for a live system test. For this the system was rigged with a temporary harness.
Not all components could be tested eg. the injectors.
But the harness and calibration of temps, pressure and TPS was done.
Nothing of all this would be possible without my awesome buddy Olaf.
Thanks again Olaf! He is one of the very few that have backed me through this project.
Most others have been quite negative about the whole project so having guys like Olaf have been crucial to keep the spirit through the process.

Olaf in full action with the computer. 
(Same computer that decided to crash the same day the fist engine start was up)

First test of the system with Tuner Studio. 

Saturday, April 25, 2015

TPS vs Tecalemit Jackson throttle body

When brackets and all adaptation was done to the vintage Tecalemit Jackson throttle body I had to do some testing of the complete unit and it looked like this.
The vintage TJ throttlebody was now brought in to the new century !!



Shine

When the brackets for the throttle body was done I thought they deserved some shine and rust protection. Some Zinc plating gave the final touch.

Shiny brackets worthy a throttlebody 

Throttle arrangement

To have a hardware adjusted idle and a good enough return spring something had to be made.
I took the return spring from a Buell throttlebody I had in the shop. But first I made a nylon bushing for the spring and shaft and then a bracket to hold the idle screw and stop screw for throttle travel.
Many templates of both cardboard and Pepsi can was made before I started with the real pieces. But soon enough I had some pieces I was satisfied with so I just welded them with the TIG. Drill holes, tap and some screws, some grinding and I had a throttle arrangement.

Buell return spring and home made bushing

Template time for the bracket

Bracket in the works

Welded and ready for some cosmetic grinding
( Yes, I was LOW on gas that day)

Final bracket

TPS

To get the throttlebody in to the new millennium a Throttle Position Sensor, TPS was required. I had a Buell throttle body with a TPS in the shop already so why not use that one. First I made a bracket to fit the TPS to the throttlebody. Then it was time to adapt the shaft to fit the TPS.
A hole had to be drilled dead center of the shaft to accept a small pin to turn the TPS. And finally a new connector was attached to the TPS.

The bracket

TPS test fitted

The drilled shaft

Dead center
Not to shabby consider I did it with a low buck asian drillpress.

New connector on the TPS