From: keltro@att.net
To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] More run time, fewer issues
Date: Tue, 16 Mar 2004 05:16:26 +0000
Message-Id: <031620040516.26050.3db9@att.net>


> I’m having great fun trying to program my EC2.  But I would love 
> some input if anyone has any ideas. The situation so far is thus:
> 
> It runs really great over about 18”MAP.  I had it up to 23 “ today and 
> I almost couldn’t keep the tail down.  I am running the stock turbo II.  
> I’m not really sure what the pressure was up stream of the throttle 
> body but I think it was more than ambient as one of my manifold 
> temp sensors (held in place only by RTV) got popped out of its 
> hole.  Manifold temp at the time was about 32C.
> 
> I’m not sure what RPM I am seeing because I haven’t been able to 
> get the tach working yet (hey Tracy – do you think the signal output 
> to one of the LS1 coils could be run in parallel to the tach?)
> 
> Other parameters include (so far) max coolant temp 38C and oil 
> 60C but that was after only about 15 min. at 19”MAP. 
> 
> I definitely need a bigger coolant reservoir.  I hold just under to 
> quarts now and it is still overflowing without even getting very hot.
> 
> The turbo does get very hot and makes some smoke (not a lot) out 
> the tail pipe on shut down.  I am wondering if maybe the oil seal is 
> leaking.  How much smoke on shut down is normal? 
> Snip

   Are you running full engine oil pressure (70 psi+) to the turbo. I seem 
 to remember someone else over powering the Turbo oil seal. The problem 
 was solved with a restrictor in the Turbo oil line to reduce the pressure
 to about 40 psi. This was using a TO4 Turbo. If you are using the stock 
 Mazda Turbo I do not know if this info holds true. I do not know if Mazda
 put a restrictor in their oil feed line. If you are using the stock feed
 line check it out. If using a feed line you supplied it will need restricted
 if the stock line was. On the other hand the oil seal may just be worn. IMHO

    Kelly Troyer