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Re: Building a 10,000 rpm NA engine.
I see a oil problem that would explain Matt and Bazza's bearing failure. Also Harvey has been arguing that the back bearings are being starved. YT point about looking into this closer is correct.
I have just reread the standard oil pump flow data and conclude Harvey is 100% right (this time,  ). When you check the pump specs at 5,000rpm it pumps 56Lpm but its only at 43psi keep in mind that the blow off valve is set at 85psi. That is bad news if you image that the system is call for oil but there is not enough to go around then it will go to the place of least resistance "WHICH IS NOT THE BACK OF THE ENGINE" in other words dead bearing.
I fully appricate that oil pressure over revs is not a linear relationship but you would have to rev the motor to 8,800 to blow off the pressure valve. The other point worth keeping in mind is that the friction of oil is far greater then water so pressure loss getting oil to the back bearings could be as 20psi which means the back bearing would well and truely be starving.
Tony
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1995 - SVX 700,000 K Mine, DMS Struts to lift car 2in. Tyres Wrangler Silent Armor 235/70R16, PBR Radiator. 6 speed with DCCD and R180 rer diff, Heavy duty top strut mounts front and rear. Speedo correction box fitted. New stero (gave up on the old one). Back seat removed and 2 spare tyres fitted for desert driving. ECUTune SC sitting in the box for the next SVX.
1992 - SVX 255 K Wife (Want to stay Married so not allowed to fit SC)
1992 - SVX Pearl with black roof race car roll cauge etc ready to race. Ex Tasman Targa car.
1995 - SVX Green low k mint condiation.
1995 - SVX Rally car, ex Matts car. Now to be used on track.
1992 - SVX red & Black being converted to Mid Engine.
1995 - SVX Red 143,000 bit rough.
Owned 5 others Subaru back to a 1974 1400 GSR.
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