Ummm 12.8a/f is not conservative, lol.

 

I find it hard to believe CBRD tuned this to 12.8...Are you sure you don't have a FP problem?

 

Perhaps the fuel relay went down...because that would make sense.

 

I don't think so, when my relay went out I went from 11:1 to 13:8 or so....
But maybe it affects each car differently...

 

I would imagine it depends where your tune is initially and also your fuel setup. I would say it is totally possible and it should affect each car different.

 

I have the dyno sheet in front of me. The average a/f was 10.9
The min was 10.2 and a max of 12.8.
Sorry for the confusion.

 

Ok, so spool up was 12.8, 10.9 at peak power, and 10.2 at redline right?

 

I don't have faith in this engine at all beyond bolt on + tuned stock turbo power. Heck, by this thread, some can't even handle that. These rings suck, and most of the failures are the same way. I like the car, but am close to jumping ship (already have it listed FS). I have 90whp more than stock, and trust it is fine like this, but won't risk a turbo kit due to all the failures of 11 second cars. A clean used CT9A is calling.

 

Then go you must(yoda talk), at least your still going with an evo.

There are way more people running lots of power with no problems than there are people with problems.

As you can see most of these problems are from people doing their own tuning. I don't blame you though, I am every so slightly getting scared for my motor but it's not going to stop me.

 

If I'm not mistaken, I think the only downside is the cost of building it with aftermarket pistons/rods for added reliability. Yeah, that can be costly, but I still think I'll like my X over a IX as a DD.

 

+10000 on most the people doing their own tuning and having "odd" issues. I'm sorry but not one of these blown engines has been as simple as "the piston failed". Seems each one had some sort of weird tune, weird part, etc.

Even so, I'll be 100% ok if my piston cracks, long as I can put aftermarket rods and pistons and rings in, I'll be ok.

 

yeah i think this statement was off,

keep in mind this car came to us from another dealership, with a bunch of parts (fmic, turbo, piping, injectors, etc etc and previously tuned by another shop... it was driven with a stock cat on a tune for a test pipe etc...

when we got it, the fuel trims were off by about 11% and we tuned it at low boost and said "we will not be responsible for anything on this car". The same dealer has brought us other evo's we have simply turned away because of the mods done, and the integrity being questionable.

I have the dyno charts for this car..

max AFR simply means the highest AFR point once the car was sitting in the test window on the mustang dyno, so if I was cruising at 2400 rpm, hit the "start rpm" of 2450... while cruising, max could even read 14.7 AFR

I can upload the plot if need be!

cheers

cb

 

It's a little unsettling to me to see failures from shops like GST, HB speed, etc...

Why, because they are professionals... and I would trust them with my own car...

Seeing that, proves to me that there are issues elsewhere...

Oh well, Maybe ill do a cossie motor in my X now to prevent any issues, since we have to do some articles for a well known magazine with our own car.

cb

 

We will have a thread up shortly, documenting the most common failure. We have some excellent pics.

 

Nevermind