Dude, unless you have spent the better part of your life studying engines, and understand what you are up against AND  know first hand how "simple" changes are not so simple,  drop it and buy one the way you want it.

Seriously, don't go down this road...

Kevin

Kevin Stallard
President
Aerial Robotics, Inc.
970.201.1804 (cell)
970.464.4855 (office)




-----Original Message-----
From: Lancair Mailing List <lml@lancaironline.net>
To: lml@lancaironline.net <lml@lancaironline.net>
Sent: Mon Dec 14 20:52:26 2009
Subject: [LML] io-550 vs. tsio-550 differences?

Does anybody know the differences between the io-550 vs the tsio-550?

So far this is what I have determined:

io-550 8.5 compression vs tsio-550 7.5 compression
different fuel pump on tsio with aneroid and a reference port
different injectors with reference ports on tsio
tsio has a scavange pump lines and turbos.
different exhaust obviously
tsio has wastegate and fancy expensive stuff to control it
tsio has a different throttle body part#

The reason I ask is I am trying to create a turbo normalized io-550 and I am not sure if I should get an io-550 core and add the tsio fuel pump, injectors, scavange pump and turbos.
I could also get a tsio-550 core and put different pistons/cylinders on it. I suspect the cylinders are the same and the pistons are the only difference.

I also talked with Continental about this and supposedly the throttle body is different between the two but they could not say why. Only that they had different part#'s. They did say that something as simple as a 45 vs. a 90 degree fitting or different color paint can cause a different part# with their stuff so there is a chance that the throttle body on the two is mechanically the same. I was wondering if anyone knew the differences between the two.

Also, which core would likely be the better to get, io-550 or the tsio-550.

This engine is going on a Legacy so I am comparing the io-550G or N vs. the tsio-550c.

Thanks for any info you might have on this.

Matt


     

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