Drop in pistons, to do or not to do “that’s the question”??
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From: was Georgia, now williamsport PA
Just for your balancing woes...the pistons and rods do not get balanced with the crank. They are balanced separately. It doesnt cost that much for a bore and hone,
not saying that you cant drop in std size, but Y?
not saying that you cant drop in std size, but Y?
I'm doing a drop in piston build my self but the only difference is I'm starting with a fresh Mitsubishi Short Block, should be done next week or so. Reduces a lot of errors that can be made in my mind plus reliability of a stock motor.
If the cylinders are round enough for 160 psi across the board, they will be round enough for your pistons as well.
Its made to sound that the 4g63 is a hunk of garbage with a solid block that randomly falls out of round.
This is not the case. I have owned over 10 4g63's myself, including a number of Galant VR-4's with 170,000-200,000 miles with excellent compression.
Now a machine shop that stands to profit from the machining of blocks would definately stand to earn a fee for machine work if they instilled fear in their customer about delusions of egg-shaped cylinders and pistons rattling in their bores. None of which would take place on an engine such as RanEvo's.
An "ASSUMPTION" is being made that the cylinders are out of round and that there is a clearance problem with the rings. Neither of which is verifiable.
If the cylinders are round enough for 160 psi across the board, they will be round enough for your pistons as well.
Its made to sound that the 4g63 is a hunk of garbage with a solid block that randomly falls out of round.
This is not the case. I have owned over 10 4g63's myself, including a number of Galant VR-4's with 170,000-200,000 miles with excellent compression.
Now a machine shop that stands to profit from the machining of blocks would definately stand to earn a fee for machine work if they instilled fear in their customer about delusions of egg-shaped cylinders and pistons rattling in their bores. None of which would take place on an engine such as RanEvo's.
If the cylinders are round enough for 160 psi across the board, they will be round enough for your pistons as well.
Its made to sound that the 4g63 is a hunk of garbage with a solid block that randomly falls out of round.
This is not the case. I have owned over 10 4g63's myself, including a number of Galant VR-4's with 170,000-200,000 miles with excellent compression.
Now a machine shop that stands to profit from the machining of blocks would definately stand to earn a fee for machine work if they instilled fear in their customer about delusions of egg-shaped cylinders and pistons rattling in their bores. None of which would take place on an engine such as RanEvo's.
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Now a machine shop that stands to profit from the machining of blocks would definately stand to earn a fee for machine work if they instilled fear in their customer about delusions of egg-shaped cylinders and pistons rattling in their bores. None of which would take place on an engine such as RanEvo's.
Run a dial bore gauge through the cylinders of an engine with any kind of mileage on it and tell me they're not out of round. When you're looking for maximum HP and effieciency you want perfection that you can't get from a guy with a drill and a ball hone. The only way to do it right is to plate hone the block.
Last edited by Jackson Machine; Mar 15, 2008 at 12:34 PM.
Well said. Many reputable shops such as TTP, IVEY, Buschur etc.. have been doing the drop in method for years. I'll admit that I may have skimped when it came to the oil squirters as I did not remove them and only capped them and ran the hone downto them. Probably not the best way, but so far so good for me. Not sure if a ball hone is the way to go. I opted for a traditional stone. I was concerned about the ball hone beating up on the deck.
While it may not be the "perfect" solution in terms of compliance with **** machning specs - it certainly is a lot better then tossing a stock rod out the side of the block.
Al