[Peter De Saegher]

@ John Savage : Do you have plans to add this carb on the Jet tech software ?

[Peter De Saegher]

Hello Lee, for more than 2 years I have been working on 4 cilinders to found some HP. For the moment I have 33,8 hp on the wheels and a engine with a width power band. Engine has now 15 houres , no problem at all. It’s a real pleasure driving it.

First of all ==> writing about HP is much easier than having them realy on a testbench. Believe me it’s a lot of trail and error. Bigger ports doesn’t always mean more power guys, it’s not that simple. I had more power with a smaller exhaust port than a bigger….. you don’t want to have all your fresh gases going without burning into your exhaust pipe and cool it down….

The Krauss max doesn’t have a reliable image in europe and not very popular.
The Polini kit has the same problem ( mine had 3h and boemmmmm :-(

The DD2 cilinder or supermax only has high rpm output , I was not impressed because of the lack of bottom and middle power.

What I have done :

I have the ignition you have mentionned but directly from the OEM without rev limiter.
Modified cilinder ( additional booster ports, modified A, B, C ports )
Other cil head & piston
other conrod
balanced crank
Handmade exhaust & muffler.

I will try to post some pictures to make it more visuel.

just a question : what’s the price of a Rotax max cilinder in your country ?

[Peter De Saegher]

The sensor 265560 is placed in the carter of the engine to mesure the crank revs , no oil there. Order part 431500.

[Peter De Saegher]

He told me that the pick up has an original spacer, he has added the same one. ( 2 in total ). Hope this will work for you.

[Peter De Saegher]

I will try to phone the guy next week and keep you informed.

[Peter De Saegher]

On the underside of the engine you have a sensor for your crankshaft rotation.
Take it out, put an O ring spacer to have the sensor farther away from the crank.

I’m not running DD2 but a tuned Senoir, one day I was next to a professional team in the pitlane, running DD2 , they had the same problem. They changed carb, wirings,ignition coil etc etc. Madness. Until the moment a technician from another team came in and he told them to place the o ring spacer.
10 minutes later , problem solved.

I hope this will work for you ….

[Peter De Saegher]

After houres of googeling I found this pictures,it’s not 100% the same but I’m on the right track now !
Thanks for your answers

[IMG]http://i41.tinypic.com/2mwgu2r.jpg[/IMG]

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