Quote:
Originally Posted by Jay S
I think you have (a little) more risk of having an issue down the road by removing the pressed fit pins to change the way the pistons are hung than you do if you let them be. Personally, I would only change than back if the pistons were free floating.
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Naturally your proposal is my easiest way out, If I can be sure that the noise that I experienced in the Engine was caused by reverb (read the entire post) ,then I can move on and live with the reversed Pistons, all I want is to drive the last miles out of this Engine. The Head work should be the main thing for me to do at this time. When I put the Engine back together, I plan on blocking off the crossovers at the Heads. Can someone explain the reverb (I think) I heard/noise in Engine. Since I have Headers to collector and no cross over "X" beyond the collectors, no mufflers and the exhaust exits the Diffuser and then the dual Tail pipes.
I fear that the only way I am going to know if there is still a noise in this Engine is to assemble it and run it, in hopes it was only reverb that I caused myself. Has anybody had experience in this reverb area that I think That I experienced? Remember prior to the Trans breaking, I had no noise in the bottom end, then I rebuild the Trans. and install it, then test the vehicle Trans, get the bugs out of the Trans. and then I hear the lower noise. The Heads get pulled; the crossovers have dime size holes in them.
I think when the vehicle was taken off the road after realizing the Trans. was shot and we innovated the exhaust tailpipe extension using a 4" dryer metal hose adding 10' to the overall length, then taped the extension to the exhaust pipe, we caused the back pressure to blow out the crossover plugs @ the Head. We clearly heard the sound difference after running the car in the tent say 5 times. So now I test-drive the car, not knowing there are holes at the crossovers and Wala, a new noise suddenly manifests itself... I will say it again, This Engine has a strong bottom end and after installing the TH 400 rebuilt and test and tunning numerous times ran stronger and stronger as we eliminated the Trans. bugs.
Thus, the Heads were not yet removed while testing the vehicle that have holes in the crossovers. So, I feel that if I send out the Heads for rebuilding and install a complete gasket set and install the block off plugs at the exhaust plugs at each Header problem solved, without touching the lower end yet. I like to fix one thing at a time so I know what fixes what. Don't get me wrong, I could pull this motor, but only if I have to. The other thing that I am Leary about is rebuilding the upper end, as I have changed all the removable wearing parts already, plus, the Heads complete the top end build correctly, is spinning the bottom of the motor. I can't tell you how many times that I have heard that occurring?
So, the real question is what do we all know about reverb and the correct way to assemble an Exhaust system. Since I left out the crossovers past the collectors and did not install the mufflers and used the dryer hose etc... just mistake after mistake causing an anomalous noise in this engine? Also, when building the TH 400, I had to make many choices along the way as I am doing now, one more hurdle to leap, usually my intuition is the best thing to go by. All your help is very valuable and I thank you all for your input. Never say never and never say allways...