Well i spun the the #1 and #2 cylinder rod bearings the other day. My friend and I were out playing with our cars and we did a few high speed blast to about 150mph. Their were points that my engine was a high rpms for extended periods of time, like when i rapped 5th gear to 6k. Im pretty sure that it was oil starvation. My engine only had about 3000 miles on it and the oil was changed several times and seemed clean all up till the point when the bearings spun. Im sure it wasnt from being improperly assembled because I did it myself and took my time. Im thinkin that I used a High volume pump and yes I have a stock pan. Im sure that is what everyone is going to say the problem was. It may be but i want to know what I can do to make sure this doenst happen again. I want to be able to hold it at 6k for extended times and not starve for oil. I didnt really keep a close eye on the oil pressure at high rpms like i should have but was trying to watch the road Will a 6quart pan and a new high volume do the trick?

 

anyone?

 

#1 and #2 are farthest from the oil pump, it is possible that you have a starvation issue. A standard volume pump will flow pleanty of oil, just step up the spring and bring the pressure up. You need a good baffled pan and windage tray, if you are going to be toying with the car like that in the future, an accumulator is a good idea, they are cheap and work well. I like Champ Pans.

 

Does anyone have any part numbers for oil pumps, pickups and some of my pan choices? Also, machinistone, what is an accumulator and where can I take a look at one of these champ pans that you speak of. Thanks alot.Any advice is appricieated

 

are you running the oil cooler. Mine done the same thing with only 900 miles on it. I checked the oil cooler before I put it back on the car after the rebuild and it was clogged up. I junked it this time and have had no problems. I read up on deleting it and thats what got me to look inside and check out its condition. It has caused this problem on lots of motors.

 

I did that exact same thing. Never found out what happened, fraged the 1&2 rod bearings and the main bearing was fine. That was on the stock motor. Kinda sucked, but I have a 383 now, so thats one good thing...

 

Just out of curiousity, how did you know that it spun the bearings? Does it make a screeching/knocking sound? I'm just curious what the symptoms are.

 

I already deleted the oil cooler. I know that it spun the #1 and #2 rod bearings because I took the engine apart. And yes it did make a screaching noise while running.
Does anyone know what I can do to make sure this never happens again. The engine is built to handle all I can throw at it otherwise. Can someone help me figure this out.

 

An accumulator is a oil reserve tank that will dump that extra oil into the system under pressure if it see's less than the pre-set oil pressure warning level. Moroso is a company that makes them, they are in summit I believe, they are really called "accusumps"

Are you using re-sized stock rods? If not which ones?
What was the bearing clearance at main/rod ?
What weight oil?

Champ pans are not very easy to find online. I will lookup the part number for the pan that fits the 4th gens and PM you.

 

Thanks a lot. I apprieciate it.

 

My rods are Eagle H beams. Im thinkin the clearence was like .0025 or .003 not sure but I know it checked out with what I was told it should be. I was running Napa 10w30.

 

10w30 is too light for extended high-speed high rpm engine operation. It may get you a few extra points on the dyno, but for a performance motor I always use 10-40, and for the senario you described, racing basically, I use Kendall GT-1 20W-50. You may have heated up the oil soo much that it got really thin and starved the front two rod bearings of oil...that would be my diagnosis without actually seeing the parts.

So my recomendation is get a good - baffled pan, high-quality bearings, high-pressure pump, and use 20-50 oil.

Those rods need to be re-sized BTW, I would take the whole set in and have them all checked out. I'm not a big fan of eagle products, not because the material is crap, but because their tolerances and quality control from the factory isn't worth the chinese steel their made out of....

 

We don't need high volume pumps. Putting a "higher pressure" spring in place of the stock one does us just fine with a stock setup.

 

I never said we do, in fact I stated that in an above post...

Melling sells the standard volume pump in high pressure form under a differnet part number for the same price.

 

I think he was agreeing with you and telling the other guy that you dont need it.