Your assumptions amuse me! Because infact the rings do come unseated....40rty has also seen this ... Reread what I said.

I said this, 380/400hp is most I'd go because the pistons are not designed for it. Higher boost will unseat the rings and cause ringlands failure along with higher stress from the more hp (to ringlands). The pistons aren't designed to handle 400+whp aka 430+chp. The more they are abused the least they'll last.

The ringlands failures happen alone as well.

 

It is a issue. But apparently a LNf can handle gobbles of boost so let's all throw 40lbs at the ****** and expect a good lifespan....

 

So aftermarket piston will correct that failure?

 

This! The stock gap is not suited for high boost pressures(ie 30psi) and once the rings end to end touch it will never hold its original shape(cylindrical) therefore oil leaking pass and eventually leading to failure. My engine went in for a build and I was only pushing 368whp or so and the pistons rings were seeing blow by. You guys might be over 400whp but that is the max for the pistons. You might be fine now but it will be only a matter of time before you begin to have issues.

 

Good suggestion. And that's why most 500+hp oem motors are 6, 8+ cylinders and with bigger displacement. It is asking a lot of a 2.0L engine to do even at 400 chp.
I said it many times, use a low/high boost setup and you will have the best of both word in most cases FWIW. And don't drive like a 'Ricers' where they beat the **** out of the car every chance they get.

 

Wiseco recommends .017" for the top ring and .020" for the bottom ring for moderate street turbo and nitrous builds. I never measured what those gaps were on the stock rings but my new Wiseco rings were gapped .020" on the top and 0.25" on the bottom ring so I never had to gap them. ZZP built my short block with 0.035" and 0.030" ring gaps. I would believe though that the stock ring gaps are somewhere in the teens or less. The whole point behind their small ring gaps is to make the engines out last the 100k mile warranty GM gave on them. Those tight tolerances coupled with spark knock and the ring lands will become very brittle. Anyone making over 400-425whp on the stock block has a ticking time bomb. The higher you push the envelope the quicker it will come.

 

What assumptions? That your lack or grammar makes you look like an ass hat?
That's the only assumption that I have made.

I know full well that you're not an idiot. But taking time to re-read what you type and form comprehensible sentenses would do alot for your reputation.

Most of the time you do know what you're talking about, you just say it wrong and with a half dozen "and etc.." thrown into the paragraph.

If you want people to take you seriously and think you're smart, act like it.



And with that, I'm out. Keep with the jumbled misinformation. The rest of you, do some research.

 

my ticking time bomb has been running for two and a half years now.

 

LSJ's don't count, I'm using the they don't spool as quick excuse xD

 

lsjs suffer from ringland issues as well.... ill chime in more when i get more time on my hands.

if the tunes garbage and you have detonation nothing will solve the problem and i wouldnt run wiescos on stock rods either. you go all in with a built motor or dont do it.

 

Butt hurt much? :/

You do research. I have been through multiple engines worth of research and more which a couple were my own, and others were people I helped or friends. I have seen engine failure 1st hand bub. The stock pistons and ring gaps are the weak points of these engines. Along with the stock ungirdled sleeves. Do I need to have multiple people chime in which have been through this same scenario. Some making 50 less horsepower on blowers?

 

hi, im here for the train wreck.

 

im here to watch now lol.....

 

magical wizard jizz and unicorn poop holds yours together.

 

I don't always chime in, but when I do...I talk about unicorns lmao

 

Where oh where did I say you were wrong?
Oh, I didn't.

Not butt hurt. Annoyed.

Since you obviously didn't understand what I said, let me rephrase:
You guys know what you're talking about, you just word things wrong often.

 

um... the source of the tune should not be blamed for this...

I'd be inclined to think:

'high boost' + 'stock bottom end' = 'trouble'

[QUOTE=Chevycobaltss3;6971562... telling people "400+who is safe on a stock bottom end is like saying (you) dont (to) wear a condom when you have sex with a random ugly chick.
... Just because your car didn't blow doesn't mean its safe. ...[/QUOTE]

I'm inclined to agree.

Even though I tweaked punctuation (ect) to further clarify, I feel this is VERY well put.


I just don't, and probably will never, understand why so many people here think that you can throw more boost on a stock engine, make more power - then get surprised when it pop's...

more power = more internal stress on engine

That's my two cents worth... oh wait, the penny has been discontinued

That's my five cent's worth...

 

I would think that with a good tune, and by skipping that ever so tempting high boost number, that you should be able to make it...

I don't think James ever said that you can't make this hp safely - I understood that he said that if you're realisitically shooting for anything significantly higher than this, that you can very quickly pop your engine if everything isn't setup just right...

But a built engine will add an extra saftey margain - which might come into play if you're shooting for higher than 400hp.

 

I had told James I'm looking for a non aggressive tune but would like to say I'm running 400

He said that a somewhat aggressive tune will b needed to hot close to 400

When it's all said and done ill be happy with less for now
Still just gms1

400 was just a nice round number lol

 

Donkeyballs was running 26psi and 400whp plus from an efr for over a year and bit with no problems if you did your research. There is so much nonsense in this thread!

 

I'll say it again. Been over a year on 25-29 psi on the BNR and she still purrs. It's a year as of 8 days ago.

A year and 8 days since me an area47 tried to R&D a way to make a cobalt fly.

 

it flew pretty good too!



i like how people have said stuff about ring land failures and no one has mentioned as to why they do.

 

Didn't you read? Because hp and boost.

 

and other factors and etc.........

 

I was also on the 30psi spike tune on the stock turbo for a long time.