This.

 

According to the UK Mitsu site, that's not the case. http://www.mitsubishi-cars.co.uk/evo...ntentContainer Flip through the "FQ-400 Technology" section.

The FQ 400 engine has: ECU retune, new fuel injectors, 3" high flow exhaust, new intercooler, new intake and a new turbo. All internals are the same.

Interesting to note, the tune had considerable work to get everything dialed-in. And, there are new fuel injectors.

 

Interesting but I couldn't find the line where they say all the internals are the same. The Japanese magazine said the pistons and rods were beefed up to support the higher boost levels of the new turbo.......

 

It doesn't say anything about internals because nothing is changed

 

You know what this means??? That the X is not "@ its threshold" from the factory!

 

This is going to be a never ending story cause the only way of knowing how to prevent it from happening is for someone showing there secrets in tuning. I am stuck on the tuning because it is a big portion of making power and having a reliable car. Most reputable tuners are not going to show there secrets on tuning cause they will lose money but that would have to be there decision to provide there tunes.




Sorry for getting you all emotional scott yes we do have a high horse power evo x shop car that is very reliable we took it and beat the hell out of it out at the track then drove it home on 600 plus horsepower on a 100% bone stock motor. I am not going to get in a pissing competition on who works on the most evos that has nothing to do with it. We have also worked on a few other evo x that came in one was on a stroker standalone aftermarket pistons and rods and still put a hole in number 4 piston and the other one was stock from a local tuner in florida and both were destroyed due to the tune and both on cylinder 4. We have worked on several other but this is just 2 to give you your comparison on stock and aftermarket pistons i will post pics tomorrow.

 

Sweet....a pissing match between shops. This wouldn't be evoM without 50 sales pitches thrown into what appears to be a technical discussion. Might as well rename the title..."FS: top fuel rods coupled with SRPs for your 300hp X!!" takes on "I made one 600hp pull with a stock motorz and AFC"

This place is a fo real!

 

Fully built:

Just to be clear, you are saying that a stroker motor came in with aftermarket rods/pistons/rings that also had the same damage "signature" that TTP claims is a result of the ring gap?

And just to keep this technical, did you by chance measure the ring gap on the #4 rings? I know you said they were aftermarket, but the still could have been to small of a gap...

Just trying to weed out facts, not feed the vendor wars...

 

I do in fact have the black fuel pump relay on my car.

 

Turbotrix built an engine and T4 turbo setup for a Jacksonville, FL Evo X and it had issues within 2 weeks whether through user error or something else. The car was on standalone with weird looking pistons, fueling issues, etc. It does not apply here.

 

Still would be nice to know this... I would also add "Milage at time of failure" to the list of relevant facts

 

No surprise, I am guessing that was your issue unfortunately.

I am guessing that is the issue on most cars as well. That coupled with the ring gaps equals kaboom.

 

I don't have an X yet but I will be buying here in the near future. I read these usefull threads to catch up on times. I'm still stuck in the 1g era.

To add to this discussion, if this is a problem with a gap that's to tight and heat expansion you could take into consideration ait's. Is this an issue only occuring on cars with stock intercoolers? Maybe a maxed out turbo forcing out to much hot air? That would increase combustion temps thus giving more expansion.

Either way modding the 4B11, your on borrowed time. 10 yrs ago one would say that the original 4G63 engine was only good for 350-400 hp level. Now I know properly set up these engines are good for 400-450. Is there an error with the setups on the cars having this engine problem. There's something outta place here. The success rate of the higher hp stock 4B11 is greater than the ones having this issue.

 

does this apply for ralliarts also??

 

I find it hard to believe that this is causing the issue, this may the the result of another problem, but not the source of the destruction. In order for the ring ends to collide there would have to be a serious heat or cooling problem. I'm sure that Mitsubishi tested the tolerances of the engine with heat, and they would not have engineered an engine that would have a failure level with low(er) temperatures, they have been building engines for many many years. They designed these cars to be run hard and in extreme situations, simply saying that the ring gap is too small is simplifying a problem that could be attributed to hundreds of other things. This is not a critical engine flaw, it is a user flaw, otherwise engines would be blowing up everywhere, a critical flaw cannot be attributed to a .01% (if that) failure rate.