Received-SPF: pass
 receiver=logan.com; client-ip=67.222.54.6; envelope-from=jslade@canardaviation.com
Message-ID: <503437B0.1010106@canardaviation.com>
Date: Tue, 21 Aug 2012 21:36:48 -0400
From: John Slade <jslade@canardaviation.com>
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:14.0) Gecko/20120713 Thunderbird/14.0
MIME-Version: 1.0
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: Re: [FlyRotary] Turbo diagnosis update
References: <list-5722877@logan.com>
In-Reply-To: <list-5722877@logan.com>
Content-Type: text/plain; charset=ISO-8859-1; format=flowed
Content-Transfer-Encoding: 7bit

Sounds like you need a new intercooler, Chris. What size hoses are you 
using? Maybe they're undersized.
Wait till you try it on the runway! That extra 600 rpm / 4 lbs MAP will 
feel quite different. In fact you might get a taste for having power. If 
you do, dump that 3lb spring and get yourself a 10lb one. Maybe 
increment upwards to 6 first. You'll soon be shouting "Wahoooooo."
Regards,
John
PS - One of my checklist items on runup is "MAP 40". I wont roll if it's 
low.

On 8/21/2012 7:49 PM, Chris Barber wrote:
> When I got to the hangar this afternoon I jumped into a diagnosing my turbo problems. I checked out the turbo and it moved easily and freely with no noticble physical damage. I cranked up the engine, crawled under the wing and removed the hose from the intake and felt if I could feel any preesure out of the hose from the turbo. No joy. I couldn't feel any air movement. Ok, shut her down and went to the other side of the engine and removed the hose from the outlet of the turbo compressor. Cranked her up and felt for air out of the turbo compressor. I felt steady moderate air pressure. How about that. Data. I also could see the compressor spinning nicely.
>
> So, I rigged an alternate plumbing route and bypassed my intercooler. I also removed the pop off valve as it over complicated the rigged plumbing.
>
> I got it all buttoned up and started her up and recorded my readings like yesterday.
>
> They were as follow:
>
> 2000 - 14.1
> 3000 - 15.4
> 4000 - 20.2
> 5000 - 26.4
> 6000 - 30.3
> 6200 - 31.2
>
> Hmmm, seems more like it. So, it seems if I may need a new intercooler unless I am missing something.
>
> The new power surprised me as in just the short time I was at the higher power setting, the time it took to write numbers down, I overheated. I have had no heating issues since I modified my radiator location back in April.
>
> Again, this is with a 3 lb spring on the waste gate and 93 octane fuel
>
> Thanks for y'all's input.
>
> Chris Barber
> Houston, GSOT
> Velocity SE
> 13b turbo rotary.
>
> Sent from my iPhone 4
> --
> Homepage:  http://www.flyrotary.com/
> Archive and UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.html