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Turbo 912S

PostPosted: Thu Oct 24, 2013 12:02 am
by mongo
I am turbo charging a friends 912S engine, and as he will attest it has taken me way too long. Stupid job.
It is going to be a pretty nice piece, with an equal length exhaust system, custom turbo, and an intercooler setup. The compression has been reduced to 9.2 to 1, the crankshaft has been welded, and we are running a 914 camshaft. I also increased the studs to 10mm from the stock 8mm and they are machined out of 17-4ph H900 condition stainless steel, which is 30% stronger than the stock stud steel.

While developing this system I realized that there is no way to adjust the timing on a Rotax, and the stock timing is far to advanced to let me run the boost levels I wish to run (7-12 psi). The timing is adjustable in any increment by just selecting the correct "Pill" and installing them, another benefit is that it is about half the weight of the stock unit. If anyone is building a similar project, or you wish to squeeze a few more ponies out of a stock engine by advancing the timing a few degrees please PM me.

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The Pills in this one have three positions 1) Std. 2)-6 and 3) -12 degrees

Re: Turbo 912S

PostPosted: Thu Oct 24, 2013 12:10 am
by mongo
I just realized how bad the garage looked in the first pic so I had to redeem myself and show the update.
I also included a few more shots.

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Re: Turbo 912S

PostPosted: Thu Oct 31, 2013 9:44 pm
by mongo

Re: Turbo 912S

PostPosted: Mon Oct 03, 2016 4:51 pm
by BadAssBushCraft
How did you make out with this build?