On 6/13/04 2:32 AM, "keltro@att.net" <keltro@att.net> wrote:

 

-------------- Original message from "DaveLeonard" : --------------
> I got the turbo back from the re-build shop today and did some high speed
> taxi testing. I even got the tail off the ground.... :-)
>
> Cooling has not been an issue yet for easy ground testing. Coolant and oil
> both maxed at 70C (160F).
>
> With Jim Maher's help I fixed my tach and found that I really am getting
> more than 4500 RPM. To be specific, 4700 static at 29"MAP and 5300 at 33"
> using Jim Mosur's old prop (similar to Tracy's old prop?) And that's enough
> to fly.
>
> First flight was scheduled for Sat the 19th, but the turbo continues to spew
> oil-smoke. I am beginning to wonder if I am feeding it too much oil. Rusty
> says that is an internal restrictor, but looking in the oil inlet it looks
> like it goes straight to an oil gallery. I am feeding it with an AN-6 line.
> I think I should try putting in a restrictor but I don't know how big to
> make the opening. Any input?
>
> The oil return is also AN-6 (and bigger) and is all downhill to the pan.
>
> Dave Leonard - Should have gone n.a. Should have gone n.a. Should have gone
> n.a. (not really)
>    Dave,

 

    As I recall from previous posts the 80psi +or - oil pressure of the 13B is a

 

little much for the turbo oil seal. I would put a restrictor in the feed line or

 

fitting. I would think 40psi or less would be plenty. Are you using the stock

 

oil feed lines or replacements? Has anyone in the group ever checked the

                                                                                                                                                                                                                              
stock Mazda lines or fittings for a restrictor? IMHO

 

 

 Kelly Troyer

Dave,
I have not seen a restrictor, but the stock feed line is only about 1/4” OD steel and the drain is 1/2” steel.
By the looks of it, you are over pressurizing the oil galery.
Bulent