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bbolds442 · 03-28-2008, 04:22 PM

Its funny, i have built many performance engines, and this engine is the first that i have been stumped on. i was going off of stock clearances, using the perfered crank to run via mondello, 68-69 and spinning it up to 6k. the oil was slingging off the crank journals and burning up the mains..rods and cam bearings were always ok. I had a old guy disect the engine and said that i should be blowing the doors off with oil pressure, he said that the trick to making these engines live is TIGHT clearances. told the machine shop to put the mains at .001 and rear main at 1.5-.002" and the motor is alive and very healthy. I did everything i knew to do with the oiling system and had some help from mondello and a buddy that used to build don garlands nhra engines for his dragisters. I used this shop because they were the only shop that had torque plates for the olds. It wasn't the machine shops fault, because the clearances were right at stock spec, from manual. I plastica guaged it every time. I think it was not knowing the characteristics of this engine. I have never heard of this before, but it seemed to work. the engine has a sh$t load of oil pressure even hot...@ 195 degrees and 3k rpm, its got 50-60 psi, 20 psi at idle...now when its cold i will blow the oil filter off...yes i have done this....well over 100 psi during a rev. Does any of this sound right??? The engine is doing great and has been together for about 5yrs now.. don't drive the car much though. its probable got 1500 miles on engine and oil is very clean during oil changes!
appriciate any feed back on this issue!
Robert

03-28-2008, 04:22 PM	#4 (permalink)
bbolds442 Junior Member Join Date: Mar 2008 Location: Louisville, ky. Posts: 12	Its funny, i have built many performance engines, and this engine is the first that i have been stumped on. i was going off of stock clearances, using the perfered crank to run via mondello, 68-69 and spinning it up to 6k. the oil was slingging off the crank journals and burning up the mains..rods and cam bearings were always ok. I had a old guy disect the engine and said that i should be blowing the doors off with oil pressure, he said that the trick to making these engines live is TIGHT clearances. told the machine shop to put the mains at .001 and rear main at 1.5-.002" and the motor is alive and very healthy. I did everything i knew to do with the oiling system and had some help from mondello and a buddy that used to build don garlands nhra engines for his dragisters. I used this shop because they were the only shop that had torque plates for the olds. It wasn't the machine shops fault, because the clearances were right at stock spec, from manual. I plastica guaged it every time. I think it was not knowing the characteristics of this engine. I have never heard of this before, but it seemed to work. the engine has a sh$t load of oil pressure even hot...@ 195 degrees and 3k rpm, its got 50-60 psi, 20 psi at idle...now when its cold i will blow the oil filter off...yes i have done this....well over 100 psi during a rev. Does any of this sound right??? The engine is doing great and has been together for about 5yrs now.. don't drive the car much though. its probable got 1500 miles on engine and oil is very clean during oil changes! appriciate any feed back on this issue! Robert Last edited by bbolds442 : 03-28-2008 at 04:27 PM.