Yeah, but at the same time you cant treat them as your personal pit crew when something goes wrong with the engine you modified.

 

DUDE. READ. Pig Rich

Plus stock evos don't hold 20 pounds to redline anyways.

Your comment justifies nothing. Are you trying to imply that the 4g63 should not be able to handle itself? That would seem silly for a manufacturer to release a car with a motor that is unable to even handle the tolerances that the manufacturer are setting them at. And as Al has said numerous times, this possible rod bearing failure is seen in as many stock evos as modded ones.

 

People aren't trying to. If you buy a pair of shoes, change the laces, and your soles fall off, who's fault is it? Did your lace change cause the faulty soles? Not likely.

 

Yeah I know, but its going to be hard to justify how your motor blew. You were running MBC which bypasses the safety feature of the ecu, plus other stuff (ie flash) that could have contributed to the problem. I hope you get everything sorted out.

I know you have low miles in your car, but hey look in the bright side you can now justify getting a stroker kit with stronger enternals

 

Not really we will know real fast once the head is off and the pistons look like the moon or not until this everyone is mearly speculating

 

Also as a FYI, the dyno was done in a bay that was no warmer than 35 degrees, it was snowing out, and the bay door was open.

 

The brand new cars themselves have a warrenty. If anything would go wrong due to the BR parts that would not be covered.

I agree with the rest of you comments, definetly.

 

the end is drawing near for this thread

 

Richening the mixture at high rpm is a means of reducing heat, which provides a nominal degree of detonation resistance. This is why the factory programs it that way. I'm not saying this is ideal where optimum power is concerned, nor am I implying this to be the cause or even an aggravating factor of the failure. I don't care who tunes it or doesn't tune it, one in so many will fail for various reasons regardless.

These engines are not race engines. They are passenger car engines, built on an assembly line, and are designed to withstand maybe 300hp or so with an acceptable failure rate. The cast pistons and flimsy rod bolts were selected because they are c-h-e-a-p, and good enough to hold up to regular use. The factory anticipates that one in so many will fail prematurely. Increasing the power and extending the revs (as we like to do) increases the chance of failure significantly, and exposes the weakness of factory parts much faster. This is the risk we accept.

There's no need for mudslinging, and no point in making it more complicated. One in so many skydivers will experience parachute failure. At least a blown engine is something that can be fixed.

 

Wow. This was quite a painful read. That sucks that your motor blew and I wish you luck with the rebuild.

Al- the way you are conducting yourself makes it appear that your flash contributed to the motor going out. Changing policy on flash and defending 12.1 afr as safe, but claiming that you do not flash that way(means it was a bad flash or bad sniffer determining afr)

Shiv-Bummer EricR's motor blew but it was repectable that you helped with the rebuild process. I do not think you began this pissing match in this thread at least.

On final analysis, Al stop saying well I didn't comment in Shiv's thread about the blown moter; well, that is because it was in the vishnu forum. This was posted in Evo Turbo/Engine/Drivetrain which give anyone with a membership the right to comment, and you do not have the right to call this your thread(and in doing so you are saying it is your fault)

 

how about we do this..... to help Stew's car of course, since it was the original topic of this thread.... everyone who posts to this thread should pony up $5 for each post, to help an EVO brother in need. Al, you've got half the short block covered already. And Shiv, you've got about 1/4 covered, which just leaves 1/4 for the rest of us non-tuner "idiots" to cover.

Al, you keep saying you want to help Stew out any way you can. Well..... since you've changed your tunings philosphy of not tuning any cars with a stock fuel pump, based on Stew's misfortune and upcoming financial burden, why don't you give him a free fuel pump??? It's only fair, right?

 

OK, I read ALL 26 pages of posts, so I get to put in my 2 cents...

Having read various tales of horror like Stew's in the last 2 years on this board, I come away with the very real sense that each Evo is simply a roll of the dice. Some Evos are well built, and others seem to have some fatal flaw lurking that may or may not need much coaxing to reveal itself. Some burn oil, some don't. Some have a higher stock output than others. Some idle rough, others don't. Just as some dealers are competent, some are inept, some are helpful, some are pr1cks. For every guy running some hefty list of mods and recording big power output, there's some poor soul whose stock Evo's rod bearing/diff/tranny/turbo/etc. gave out. Add on top of that the other things that can change the equation - drivers, maintenance, etc., and it just helps muddy the picture. As much as we'd like, there's no way to guarantee reliability other than leaving the car parked in the driveway.

Each change you make takes you a little closer to the edge. Depending on the state of your Evo, you may already be close to the edge, or you may be a safe distance from it. You won't find out until you step out.

Because of the acknowledged variation of build quality for each Evo, it's going to take some strong piece of evidence to unequivocally point out what happened to cause our friend Stew's engine to grenade. In the end, whatever happened may have happened no matter what parameter was changed or was left stock. Mitsubishi probably won't see it that way - they'll point at the modifications that took power output above stock levels and will most likely deny an warranty coverage (but I can't blame you for trying).

Good luck to Stew.

 

For everyone who doesnt work on cars, dont think its just Evos that have engine problems here and there. Being a tech, I have seen a lot of different brand of cars with failed engines and hardly any miles on them. With parts moving at 7,000+rpms, theres a lot of room for failure. Every brand of car is going to have its problems, dont let this scare anyone away from buying an Evo. There arent many car models that have forums as large as this for everyone to hear about these kind of problems. When you compare the amount of engine failures to the amount of running engines on this site, its not too many.

 

I do believe that weather does play a lot of factor.

Ever since Evo came out, it's usually around this time that most of them blow up or have problems.

I've noticed this since a year ago. as the time goes by, seems like there is a pattern for when things like this happens.

few of the SC and and Virginia Evo's are blowing up from what I hear, as well as some here in North Georgia.

 

I stilll don't understand why tuners are arguing here.
I had a car that I ran very lean. I knew it was lean. I ran it until it pinged a lot then backed off the boost. I ran it until pistons cracked. I replaced them with forged pistons and ran it until the cylinder head actually melted from running lean (that was an accident when the fuel pressure regulator sense line blew off at 30+psi).
Never had a problem with rods. Sounds like a manufacturing issue to me. It takes a lot to toss a rod and tuning seems to have little to do with it.