I suggest those with delusions of grandeur regarding the strength of stock OEM BMW engines under heavy stress to review these photos.
Stock longmotor saw 50 hours full racing before total dismay, 0 street miles in the e30. Head was rebuilt stock; before it was swapped into our e30 racecar it had about 70k street miles attached to an automatic.
we learned the hard way that valve spring retainers are not strong enough for over 7,000 rpm redline + endurance racing
Bottom and top were going to kaboom; top happened to pull the trigger first.
failure happened at 2,000rpm idling on a lift; I was able to shut it down within a few seconds.
head gasket was intact when broken down.
Solid Billet motor mounts are brutal on the oil pickup regarding vibration stress.
I would suggest a T-T s54 pan conversion for those with the budget; otherwise advance replacement of the pick up and oil pump every 30 hours
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Caged chassis + reinforced suspension and x members + solid mounts+ no rubber anywhere + full racing everything = destruction of engine via harmonics (eventually)
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destroyed oil pickup has little pieces of its casting alu in the suction screen.
Valve head from #6, piston pin surround from #6, c clip for pin not pictured but intact (and floating in oil pan)
Rod Bearings are not destroyed... - none were spun but did show slight starvation as our oil pump was destroyed internally.
Stock longmotor saw 50 hours full racing before total dismay, 0 street miles in the e30. Head was rebuilt stock; before it was swapped into our e30 racecar it had about 70k street miles attached to an automatic.
we learned the hard way that valve spring retainers are not strong enough for over 7,000 rpm redline + endurance racing
Bottom and top were going to kaboom; top happened to pull the trigger first.
failure happened at 2,000rpm idling on a lift; I was able to shut it down within a few seconds.
head gasket was intact when broken down.
Solid Billet motor mounts are brutal on the oil pickup regarding vibration stress.
I would suggest a T-T s54 pan conversion for those with the budget; otherwise advance replacement of the pick up and oil pump every 30 hours
*********
Caged chassis + reinforced suspension and x members + solid mounts+ no rubber anywhere + full racing everything = destruction of engine via harmonics (eventually)
*********
destroyed oil pickup has little pieces of its casting alu in the suction screen.
Valve head from #6, piston pin surround from #6, c clip for pin not pictured but intact (and floating in oil pan)
Rod Bearings are not destroyed... - none were spun but did show slight starvation as our oil pump was destroyed internally.
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