Ken Welter wrote:

 > > > >>This is a trick that Rob Golden at Pineapple racing turned me

on

 to,
 > > he did dyno testing and found 15 degree drop in oil temp

measured

 > > before the cooler by doing this, you drill out the plug in the

side

 > > of the front housing and tap it to take the oil strait out of

the

 oil
 > > pump to eliminate all the small oil passages and 90 degree bends

in

 > > the front cover, then  you plug the outlet on the front cover,

this

 > > way you can still use the injector if you wish and the pressure
 > > relief valve functions as normal, Also do away with the banjo on

the

 > > return line as it is very restrictive.<<
 > > Ken Welter

 > Yes, it works very well and there is one thing to be careful of.

The

 > front [end-house] plate is fairly thin in the area of the new
outlet.  If you
 > overtighten the fitting into the plate it'll crack the plate.

Rob'll

 > tell you how to best do this.  Fixing a cracked plate is a bitch!

You

 > have to remove the front cover and grind/weld the cast iron (not
 easy).
 > However, the resultant flow increase is phenomenal!  You can run 3
 > window mains without worrying about oil supply at idle.  Those

banjo

 > bolts suck for main oil lines on a modded engine!
 >
 > I have this on my '90 GXL and would never go back unless I had to.
 >
 > Seth

   The best way to install the fitting is to do it after the case and
front cover are bolted together so you have the pressure squeezing on
it and like I said use  high strength locktite so you don't have to
torque on it hard.

  Ken Welter

Ken why use a pipe thread? Why not a face seal fitting with an O ring

seal?

http://www.hosexpress.com/hydraulic/adapters/oring.htm

It won't put as much stress on the cast iron front cover when
it is torqued down.

Paul Lamar

Are these fittings, or at least the O-ring type, available with the proper

metric thread for the front and rear housings?

Wendell

I don't know. I think most people are going from the stock metric
fitting to AN fittings for the oil cooler plumbing anyway so you might just
use an AN fitting for this modification. Mazdatrix and others sell a kit
for the Mazda that converts the oil cooler lines to AN SS hose.
Mazda had a lot of trouble in the second gen RX7 with failed oil cooler
lines.

Paul Lamar
 
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