Excessive oil consumptionAugust 29 2011 at 3:10 PM
|Anton (Login DoctorFortyForty)|
from IP address 22.214.171.124
I had a new engine built up with a 393 SCAT stroker kit. The engine runs good but it has excessive oil consumption. Over the last 709 kilometers it consumed 5.5 litres of oil. That's 1 litre every 129 kilometers! About a quart every 80 miles in US units. This is insane. I have no leaks so it is really burning the oil off.
This is not an old tired engine but a newly built up engine with about 3500 miles on it.
The only way I can think of this happening is that it just goes past the piston rings. But then there should be some real problems with the rings, and you would expect compression loss. I haven't done a compression test yet, but the engine runs really nice.
Next weekend I want to do a compression test. But I was just wondering if there is another way how you can burn off so much oil. Is it possible for the oil to get into the cylinders via the valve stems? My oil pressure is quite high so maybe there's a lot of oil upstairs in the valve covers. Any ideas?
Scat 4340 forged crank with 3.850 stroke
Forged I beam rods 6.000 with ARP rod bolts
SRP flat top pistons .030 over (compression approx 10.2:1)
4V open chamber iron heads
Manley stainless valves
Lunati voodoo cam: duration 227/233 @ .050, lift .552/.564, lsa 110
Scorpion non-adjustable roller rockers
Melling high volume oil pump
Milodon high volume pan, pick-up and windage tray
Blue thunder dual plane intake
1/2 open spacer
750cfm Holley 3310; secondary metering block; yellow spring in vacuum secondary, otherwise stock settings.
FPA headers and factory dual exhaust
MSD ready to run dizzy
Mallory promaster coil
C6 trans with CJ stall converter (2200 stall?)
3.89 limited slip rear end
Car is a 72 Mach1