Dick,
Find out what oil flow in qts/L per minute that turbo needs. Then hook up an
oil line with a valve
so that you can determine what size you will need. I would Mobil1 0W-40 oil
because of the way
the old VW oil pressure/oil cooler control valve works. High pressure bypasses
the cooler. Not good.
The one thing that limits HP on an air cooled engine (except at the drags) is
exhaust valve
temperature. Number 3 exhaust will die if the stock oil cooler, in the stock
position is used.
Use LOTS of water. For each gallon of gas use 1-2 quarts of water. No Sh-- !
Remember,
you can't use alky in a gas class.
I haven't done it, but I would consider using a cheap RV water pump with 5 gal.
jug to spray
water on the head at each exhaust port location. I should help keep valve temp
down. Talk
to Rick Gold (ERC) about which gas to use. Remember, there isn't an engine made
that
can't be blown up with the right turbo.
Have fun,
Bryan
Dick J wrote:
> I need some help from some of you turbo guys - - especially any of you who
>used to be VW guys in the past. I'm taking my first "baby steps" ever into
>the world of turbocharging. I'm building a pull-through system utilizing a
>KKK turbocharger and DelOrto side draft carb with boost-controlled water/alky
>injection, on a modified VW aircooled 4 cyl in a vintage Porsche. (I hope to
>make the USFRA 130 club with a VW motor!)
>
> Everything I read indicates that a restriction orfice must be installed in
>the oil feed line to the turbo, but nowhere can I find out what size this
>restriction is supposed to be. Remember, this is a vintage VW motor, and if I
>feed full flow oil from the block to the turbo with 1/4" line, then the
>crankshaft journals starve for oil and last about until high gear is engaged.
>This is probably a problem unique to vintage VW bug motors.
>
> Anybody know what size I need to neck that oil line down to?
>
> Oh, for those of you who may wonder, this Porsche is in addition to the
>hemi-Stude, which is still occupying first seat in my shop - - and coming
>along nicely - - but oh so very slowly!
>
> Dick J In East Texas
>
>
>
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