Remarks on Porsche 928 2/6 and 944 2 rod bearing failure
Kibort Effect understeer http://www.youtube.com/b1JSv6WxigU
Kibort Effect neutral http://www.youtube.com/NUh7KtFq09Y
Kibort Effect oversteer http://www.youtube.com/-E5jNo0KfEk
Porsche 944, 951, 968 L4: 2.5L 2479cc and 2.7L 2681cc (both 78.9mm stroke as used in 944 variants); 3.0L 2990cc (88mm stroke -- as used in 968, stroked version of scraper) $79.95
Teflon® stock and knife-edged versions$229.95; the Teflon® version includes the rear screening found on the windage tray setup.
Windage tray setups: The windage trays have either the steel or Teflon bladed upstroke scraper removably built into the framework -- this is so the scraper can be adjusted without the screen in the way. In addition, the windage tray setups have a downstroke scraper that bolts onto the frame. The downstroke scraper was originally used in the 928 windage tray setup and has been adapted over. The 944/968 engine is derived from the 928 V8.
These pictures show the assembly nested in a 951 pan with no modifications needed to the pan or baffle; the jig holds the bedplate the correct distance away from the pan (accounting for the 8mm thickness of the pan gasket):
You must first determine whether you have what we term an "early" or "late" style pan (968 and some earlier engines). There are a number of different pan variations but for the windage tray it is the style of the internal ribs that is important. The style of the internal ribs determines the screening pattern used.
This is the "early" style:
This is the "late" style:
$509.95 for the steel version; $639.95 for the Teflon bladed version.
We also make an oil pickup support bracket for the 944/951/968 engines that can be used with our products or by itself. The customer uses the engine as a jig and the bracket can be brazed or welded into place:
July 2nd, 2008:
I installed my 944 Turbo Windage tray/Teflon crank scraper and I’m happy to report my oil pressure is consistently 1 bar higher than previously. Normally after working the engine at sustained high rpms and coming back down to idle I would see the gauge fluctuating above and below the 2 bar line. Now under the same driving conditions using the exact same oil, I never see below 3 bar at idle. I just thought I’d share my experience with your product.
July 29th, 2006:
The Porsche 944S Scraper and Windage tray you made up for us WORKS GREAT!
The engine revs more freely near the top and really pulls. It would actually labor at the top end of the range before.
I wish we had a chance to hit the Dyno but the performance I would say speaks for itself.