What are the best piston rings to use?
 

A friends Dsm 4g63 with wisco pistons recently started having some blow by problems. It's gotten steadily worse so were taking it apart in the next few days and replacing the rings. Unless we find other problems, like cracked ringlands :-X .

What it has right now are the rings that came with the wiseco's I know when I rode dirtbikes the mechanic at honda kawasaki always told me to use the kawasaki rings with a wiseco piston because they hold up longer. Are their any better rings to use, this motor only has about 10k on the rebuild ? it was assembled at a machine shop. So I don't really think it was assembled wrong.

So what rings do you guy's recommend?

Re: What are the best piston rings to use?
 

welcome to improper ring seating

Re: What are the best piston rings to use?
 

I agree with you. The owner babied it way to much during break in. he treated it like the thing was made of glass.
I haven't rebuilt a car motor before but on bikes I beat the piss out of them as soon as I start it. And never had a problem. the way I see it. if somethings not right then no amount of going easy on the motor is going to save anything.

It's more important to me to get those rings seated. in the first few miles after the rebuild. thats what the hone marks in the bore are for.

With this car I wonder about that though because it just started the rings seated. If they hadn't it would have had blow by from the start ??

Re: What are the best piston rings to use?
 

not if you seat the rings and continue to wear the honing off of the cyls/use low temper(cheap) rings

Re: What are the best piston rings to use?
 

Not trying to question your ability or anything, why do you think it has "blowby"??? Is the car smoking? Losing power? Missing? What is it doing?
Have you checked it with a leak-down tester yet? Compression test wont tell you ----.

what kind of turbo is he running? What else was done to the engine when it was apart???

Ive owned a few 11sec. DSm's (not very hard to do I admit...) but to answer your question the best rings to use (4g63) are pretty much anything name brand, not a major factor on 4g's. The important part is getting the gap right. :6

Re: What are the best piston rings to use?
 

For Honduhs, I recommend Hastings. You can't visually tell them apart from OEM. ;)