Hey guys... I think I have a knock developing in my bottom end. At idle there is no noise what so ever and at startup there is no noise. I can punch the gas and not hearing anything until in the middle of rpm downfall punching it again where I hear a faint clatter. This will be my 2nd bottom end to go out if it does. This one will have lasted me about 4k miles which I am not satisfied with at all.

I have a f22a1 and Im boosting close to 10 lbs tuned on Crome.

When I put this engine in I put all new bearings in the bottom end... rod, main, and thrust washers too. Checked every tolerance 2 times and all was within spec using stock size bearings matching crank codes.

What would be causing my bearings to go when everything was in spec? Is this a knock again, I feel no power loss what so ever either.

 

It's my thrust washers again im 99.5% sure. Same thing happened last time. It gets louder in turns against my main turning axle. This is a different crank and block. Could it possibly be my clutch causing these problems?

 

hows the oil pump and oil pressure? just a thought...

 

oil pump and pressure is good. 90psi cold start and around 50ish driving