Thought I'd follow up on the Rotec Alt kit.
An issue arose when placing the ss7 top cowling on the plane. The bracket as is, allows the big lug of the alt. to be at the 12 o'clock position and in just outboard of the spinner fairing. There's just not enough room for the cowl to fit. You need at least .5 - .6 inch of clearance to clear the top cowl.
Now there is enough material in the bracket to get it to work, but you have to really think out the geometry and have the proper tools to do the job. For the average builder it might be a bridge to far.
I got it all to work nicely but it took the better part of the afternoon to do it.
In the 1st pic you can see where it was hitting, just to the port side of the spinner fairing (the raised portion of the top cowl that mates with the spinner)
2nd pic shows where it was hitting on the alt.
Alt bracket interference.jpg IMG_1756.jpg
I changed the position of the alt to index the lug to the 11 o'clock position. This also moved the alt. inboard which was great because we gained more clearance the further inboard we came. All this took a few hours of carving on a nicely anodized chunk of aluminum to get it all to work satisfactorily. Not a good way to go but the end result is it all works well, although it's not as pretty as before! Lol.
IMG_1757.jpg
There would be no issue for the round cowl.
If you have the skill set - then buy the kabuto (Denso) 45 amp. alt. for $120.00, a gates belt for $25.00 and fabricate your own bracket. The bigger problem IMHO is the pulley, as it will have to be matched and machined to work correctly.
I'll follow up again when I get the engine running and we can test the output and the voltage regulation.
My recommendation if you need more alt. is to use the Rotax alt. kit - $$$$, But no issues.