Quote:
Originally Posted by 20valvewynn83
I will chime in on this post as I am one of the few that has had bearing failure that caused a short block replacement. Overall bearings are relatively strong even factory bearings. Based off of inspection, what I have found is an oil starvation issue and not really a bearing problem. I think people are over thinking this bearing issue and need to look more at the oil pump and oil combination. Also bearings shouldn't be that difficult to find as all you have to do is give most bearing companies the specs and they should have them made already (our rods aren't special). I can only speak for non-FI but it should still be relevant.
Just my two cent
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Thanks for chiming in! Do you have any photos of your failed bearings by chance? I have also been wondering about an oil issue. I had planned to with a friends shop and see if we can make modifications to the OEM oil pump to increase the output if possible. Do you by chance have any photos of your failed bearings?
Quote:
Originally Posted by cf6mech
I do think there is an issue with the OEM bearings at high hp FI applications,...I feel others aren't putting ACL or aftermarket bearing in because they are not available so they roll the dice. I do believe its an oiling issue, which an aftermarket performance bearing addresses with more oiling clearance. The stock bearing is hard, extremely hard, to hard for a performance application in my opinion. I had bearing failure on E85 with no detonation with a very sound tune on a built motor running close to 400whp Using Amsoil 10W 40. I'm now equipped with Accelerated Performance Pauter rods with ACL bearings and at 300whp @ 10 psi with no issues.
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Thanks for chiming in. I appreciate you getting back to me in my PM as well. Its good to see some people who have had failure come in here. I also know the company that built your motor builds a lot of specifically subie motors... so I also take into strong consideration if they had an issue as this is their "realm". Given this is a new motor, new clearances and overall different... but the overall manufacture is still the same. So many processes are still similar.
It is interesting to hear that they are just too hard, that I could understand. Just to keep as much info in the debate c6mech also mentioned the coating was coming off of the bearings. Was it flaking? Or was it coming off in smooth line similar to contaminants in the clearance zone?