About cheap ebay pistons and wrist pins...

[anteversion]

Listen folks... i've got to buy some very cheaps ebay pistons that comes with wrist pin, pistons and complete set of rings for something like 70 bucks. pistons looks very similar to 1g factory ones without any major differences in these. They are well builded like originals ones... the things that matter to me is the wrist pins that comes with the package. they are like the half of the thickness of the original ones. the question is how much wrist pin are submitted to stress in an conventionnal turbo engine regular basis??? When a stock engine is blown by to much hp or boost, is'it because the wrist pis can not support that ammount of boost and or/ hp???

 

[crimsondragon]

It's because either
A. Running lean as hell causing damage to the valves or piston or both.
B. Overreving the engine.
C. The rods cannot take the stress.

Think about it. The wrist pins connect the rod to the piston. At high RPMs, it's moving up and down really fast. It has to change movement instantly. Do you really want to blow a piston through the head or through the block because you tried to save $300? Internals are one thing I would never cheap out on.

 

[dsmdragon]

first I would watch what you buy on ebay.... But if you think about what you asked, You answered your own Q? If the wrist pins are half as-good as 1g pins then there wont handle the stress unless they were high alloy or titanium... So get some better pions and look at those pistons real good B4 you put them in..

 

[Afroclipse]

If you are going to chance your car with cheap parts make sure they are external and won't damage the engine in the end. You can always replace a cheap turbo, fmic or whatever without much cost and effort. The engines internals are a MOFO, think of it this way( hypothetical) using a cheap piece of string to stitch your forehead together is so so, but would you use that same string to stitch your heart together.

 

[toojung2die]

Listen folks... I've got to buy some very cheaps eBay pistons ...

eBay parts are great! I have plenty of them on my car; FMIC, intake pipe, IC tubing, etc. But when it comes to what I call "Mission Critical" parts I suck it up and buy quality from a respected and well known manufacturer and sometimes that includes Mitsu. I consider mission critical any kind of part that could cause costly damage if it fails to operate. Turbos, fuel delivery, engine internals, drive train and chassis are a few examples that fall into this category. There are dealers on eBay selling proven high quality parts from other manufacturers. I'll buy these too. Sometimes cheap parts are no bargain. I think cheap pistons with noticeably weaker wrist pins fall into this category. One failure and you're looking for a new engine.

 

[Defiant]

If they're well builded, I can't think of anything to worry about.

 

[toojung2die]

If they're well builded, I can't think of anything to worry about.

I must've missed that part. Go for it.

 

[interex]

Wow, even with a spell checker most everyone here has spelled at least one word wrong. For one, "builded" is not a word, and neither is "pions". When you guys type out a word and it is underlined in red that means the word is 99% of the time spelled incorrectly. Rule 6 in the "Before you reply" Policy says Use proper spelling, grammar, and punctuation!. Please try harder, thanks.

 

[BoostFrenzy]

If they're well builded, I can't think of anything to worry about.

interex, I think you missed the point of this response.

To the OP: It is engine INTERNALS. Couple counts of knock and they become EXTERNAL. Don't cheap out on internals no matter the situation. Suck it up and buy quality parts, or put the car down until you can buy the parts to do it.

 

[anteversion]

Thanks guys for all your info and answers! but the REAL FACT is that pistons that i've buy are really really great and i don't worry about those not for only a second....The piece that a worry about are the wrist pins and i want to know if they are tended to break a lot etc...

 

[king_of_HTX]

If you are going to chance your car with cheap parts make sure they are external and won't damage the engine in the end. You can always replace a cheap turbo, fmic or whatever without much cost and effort. The engines internals are a MOFO, think of it this way( hypothetical) using a cheap piece of string to stitch your forehead together is so so, but would you use that same string to stitch your heart together.

Word. And people wonder why dsms have such a bad rep for breaking...

 

[talonalex92]

I used a set of 70 dollar pistons/ring/rod combo a while back. They actually worked great for me.

 

[Stainbox12]

This topic was discussed a while back. I do not understand why people now blame on ebay pistons. For god sakes, its the same thing than real ones, just cast aluminium. Im actually using pistons i buy here in my country branded TIK and they handle 15 PSI, and im planning on using nitrous, by the way i pay around 8 bucks for each piston whenever i replace them. Reason why you blow a piston, its because the valve hit the piston, you melt it because of running lean. But common, please be a little bit more technical before giving such a bad advice, that his pistons are going bad just because they are from ebay. Hell, i´ve seen JE pistons being melted because of lean mixtures, as well as factory ones. It would be great if everybody would tell this guy to check his car, get a logger, a wideband maybe to check the mixture, check boost leaks, etc, before coming in and blame ebay pistons. I would buy ebay pistons anytime, there´s even better ones with ceramic coat for decent prices out there. Im impressed for the lack of good knowledge right now. By the way this guy is asking a technical aspect of wrist pins, not of ebay pistons are good or not. Next time just exclude the word ebay, and tell em you bought them from a vendor, and everything would be all right for this people.

 

[BoostFrenzy]

By the way this guy is asking a technical aspect of wrist pins, not of ebay pistons are good or not.

If the wrist pins are questionable, what makes you think that the pistons or connecting rods are not questionable? I mean, would you seriously buy an external wastegate from ebay for a GT40R just because "it was cheaper" and had a "okay reputation"? Who's to say that the person who recommends that wastegate wasn't running it on stock everything for no reason?

What really should be done, is just sourcing out quality parts and piecing a full engine kit together.

Word. And people wonder why dsms have such a bad rep for breaking...

MY POINT EXACTLY!!!

 

[Afroclipse]

This is a simple fix, your car is your car and there is no reason why we should stop you from doing what you want. Seeing that we are debating ebay pistons means you aren't to rich so I would swallow my pride and buy the real deal before your dsm ends up on permanent jack stands.

 

[Stainbox12]

Mistu pistons are around 200 bucks. The ebay ones, are the same thing, just different brand, they are same cast aluminium. So please stop giving such bad advice. Just because they are cheaper, doesn´t mean they are bad. Jesus christ, NPR is a very good brand and they sell pistons for around 70 bucks all 4 of them. And hell they can withstand some high boost. If someone would come in and at least, prove that they are bad, just because they are from ebay, ill give them a point, but most likely is not gonna happen, just because its full of people with little to no knowledge at all. Making a wastegate or a blow off or an intercooler or whatever, is not rocket science, that´s true, there´s cheaper ways of making parts, but hey at least know what you are buying. There´s plenty of people here running 300 bucks intercoolers, myself i run 8 dollar pistons at 15 PSI with a 16g. I´ve never been ripped off from ebay, and i´ve found myself, great deals there. Look for brands, just type google and do a search on whatever brand you are getting and thats it. Use common sense. Dsmer´s are not WRX or EVO or Skyline owners, YES, most of us are broke or can´t afford high priced parts, otherwise trust me, i would have myself a V8, but the point here, is that DSM´s are easy to modify, and pretty cheap. The good thing about the market, is that the market itself gave a 10-18 year old car with plenty of parts to choose from and to kick ass. Where in the world you would find an awd car turbo for 500$. Stop blaming ebay, since they are just an auction house, a market place, with great deals, and brands. Big brand companies would sell items expensive, because they gotta pay their workers and so on. Im sure, there´s plenty of horror stories with vendors as well as with known brand parts. This topic has been discussed to death, so keep on going and give a technical advice to the guy looking for a technical answer.

 

[Rob10_99]

Lets use spell check Mr. Defiant.

 

[toojung2die]

there´s cheaper ways of making parts, but hey at least know what you are buying.

That's the whole point. Know what you are buying. Are you disputing the fact that there are poor quality auto parts on eBay?

The OP is asking if anyone else has had problems with certain pistons and wrist pins. A link to the parts in question would be helpful. People that have used these pistons and wrist pins can relate first hand experience. Lacking that knowledge I would look for a proven product.

 

[toojung2die]

Originally Posted by Defiant
If they're well builded, I can't think of anything to worry about.

Lets use spell check Mr. Defiant.

Sarcasm[A] is stating the opposite of an intended meaning especially in order to sneeringly, slyly, jest or mock a person, situation or thing. It is strongly associated with irony, with some definitions classifying it as a type of verbal irony intended to insult or wound. Sarcasm can also be used in a humorous or jesting way depending on the intent of the person speaking.

 

[Black99gst]

OP; the answer to your question is in the title...

"Cheap Ebay pistons" well, they are cheap... cheap + Car = broken

 

[interex]

OP; the answer to your question is in the title...

"Cheap Ebay pistons" well, they are cheap... cheap + Car = broken

Don't give mis-leading information.

 

[Black99gst]

Don't give mis-leading information.

alright, sorry about that. let me fix it WTF...


Cheap + Car = unknown

$$$ + Car = Peace of mind

 

[Stainbox12]

OP; the answer to your question is in the title...

"Cheap Ebay pistons" well, they are cheap... cheap + Car = broken

This is the kind of guy that likes to get ripped from people. Next time whenever you gonna buy some mitsu pistons, let me know, ill buy ebay ones and ill do a mark on them. I do not understand this logic. So you mean that if you buy something cheap your car will be broken later on? But if its expensive, that means it wont? Give me a break please. Stupid post ive seen in a long time.

Know what you buying + Car = Peace of mind

Moron + Car = Priceless

 

[travunder]

You guys argue like little girls, just follow the old saying "You get what you pay for".

 

[4g64fiero]

This is the kind of guy that likes to get ripped from people. Next time whenever you gonna buy some mitsu pistons, let me know, ill buy ebay ones and ill do a mark on them. I do not understand this logic. So you mean that if you buy something cheap your car will be broken later on? But if its expensive, that means it wont? Give me a break please. Stupid post ive seen in a long time.

Know what you buying + Car = Peace of mind

Moron + Car = Priceless

The root of this argument is the recent undertones of a lack quality control in regards to chinese factories. The problem I see is that noone has even mentioned whose supplying the pistons to ebay. If you dont know the supplier you dont know the quality.

/thread.