Pistons?

many people have used aftermarket pistons...as for topline im not sure, either way id stick with something that most people have experience with here (i.e. wiseco, je pistons, ross ect)

the only two id go with are WISECOS or ROSS pistons

i have wiseco 8.3:1 pistons in my 6bolt. havent started it up yet. but that was my decision for pistons.

livnthedream said:

i have wiseco 8.3:1 pistons in my 6bolt. havent started it up yet. but that was my decision for pistons.

Click to expand...

i have also bought some wiseco pistons for my stroker build up

Topline pistons are basically OEM pistons.

I don't think he was talking about forged pistons, sounds like he was wondering about the aftermarket oe replacements. Everyone knows that weisco's, je's and every other forged piston is good. The toplines are just like the stock oe pistons. I like nippon racing pistons if i am using cast. They have better ring land placement.

if it was OE replacments i wouldnt go with any other than OE 95 mitsu pistons

I think if you are rebuilding a complete motor, IMO it would be absurd to use factory pistons. The cost of a quality forged pistons are minimal compared to the headaches that could easily be caused by a small tuning mistake.

It is understandable to replace ONE damaged piston with another factory if you didn't severly damage the cylinder walls.

I would not use "rebuilt engine" as a selling feature if that is your plan. I have bought and built numerous DSMs. If I seen one for sale where someone claimed they had been inside the motor I avoided it like the plauge. I'd buy a DSM with a blown motor before giving someone money for a "rebuilt" or "fully built" motor because unless you did it or personally seen it you have no idea what is really done.

If you are building a motor to make over 350-400 horses yeah forged pistons are better, but if you are building a low power daily driver that is properly tuned, the cast pistons will give you more life out of your motor. Forged pistons wear the cylinder bores alot more than cast. Why would you pay over 200 bucks for a set of stock mitsu pistons, when you can get a 8.5-1 that has better ring land seperation that is already set up for a 1g rod for 125 a set brand new with rings and pins.

dsmbuilder said:

Forged pistons wear the cylinder bores alot more than cast.

Click to expand...

That depends on your piston to wall clearance and ring selection. Also if you have coated pistons the friction is less. A .020 bore will also remove the cylinder taper and result in less ring wear.

In the case of simple replacement if you have no plan of high performance, IMO it would be easier to buy a low mile J-spec motor. Most J-spec motors are garuanteed to be under 40K. Properly maintained 4G63s have been known to last over 250K. If your time is worth money you save on both this route.