Matt's Car - Had a problem...or 4!!!
 

Let the picture speak for itself

Attachment 208576

http://i385.photobucket.com/albums/o...5/IMG_1184.jpg

So, I'm guessing detonation city ruined this motor? More close up pics of the pistons please. I wanna run more boost.

No Detonation, just overpowered the rods

EDIT: Battery in camera is dead. Pistons look really good, as well as the rings.

He was putting 273hp to the ground.

Don't say that. That's not what I want to hear. :vash:

Haha, I would actually feel comfortable using these pistons in another car. They really look that good.

I expected the rings to fail first, but they were excellent as well.

The worst thing about pistons was a slight bit of carbon build up on one of them.



Where's Waldo?

Meh, I'm gonna tell myself that detonation bent those rods. :) Who's Waldo? What kind of AFR's did he tune for in full boost? I still think detonation did it.....

And did it bend all four rods? I can tell two are bent from the pics. Did he have a coolant reroute? When did this happen? At 7K RPMs 25 minutes into a track session or what? What timing map was he running?

Not sure on AFR's. The guys up at Bell did the tuning.

Fine Pat, for you piece of mind we will call it detonation.

You have never did one of those where's waldo pictures?

Note: No signs of detonation were seen.

He did have a coolant reroute. This happened after a 6th gear highway pull. Not sure on timing map. But, I am sure Bell is not going to send out a tune that is so aggresive it will kill a motor....surely.

Let me know if you need rods as I only have 5 sets left.. I can hook you up and ship them out next week. 270hp is a lot of power for an NB motor in **MY** opinion.

Thanks.

I already have all the parts for the rebuild though.

Pat, If it doesn't look like all four rods are bent it is an illusion....they are bent:giggle:. Some more significantly then others.

EDIT: Dang it, 300 posts.

Wow. This really makes me want to measure my rods.

Ah, gotcha. Still strange it failed the way it did. All four at the same time.

Funny, cause I almost turned up the boost earlier after riding around this morning.

Post whore. :fawk:

I tried to measure my rod once... but the ruler was only 12" long.

As for the broken motor... that's what you get for using a homosexual fuel rail.

This is my car and there wasn't any detonation ever much less anywhere near the time we started hearing the cool ticking noises. Bryce and I were driving (Spiritedly) from Houston to Fredricksburg to the Texas Miata Roundup. Bryce did a few 80mph-140mph pulls (maybe I'll get him to pay for half the build);) and when we slowed to exit the freeway we heard the ticking. We were pretty close to BEGi so I called Stef and she told us to bring it by. My Dyno chart is on here somewhere but if I remember correctly at full boost (13psi) my AFRs are around 12.6 I think. Don't quote me. The Gay fuel rail is a new addition and wasn't on the car when the rods bent. Corky told me not to tune past 12psi on stock internals but I insisted on 13psi so I got what I deserved, a BadAss engine build. Don't tell my wife, she still thinks that it was an accident!

so this is where I sum up some details:

2003 10:1 compression motor
13 psi
12.6 AFR
GT2860
Xede controlling it.

also I'll note here that my car pings ever so slightly if I use too aggressive timing at 10 psi... on 93 pump gas...

could have been bad gas.... or diesel...

hurry, everyone in texas blow up their stock motor so hustler can't flex on you. lol

No joke. The way things are going, deaths coming in threes and what not, who is next?

:fawk::fawk::fawk:

I'm seriously putting the boost to 9 or 10 tomorrow. :bang: Don't want to, but seeing all this shit and everyone swearing it wasn't knock worries me.

you guys need to knock it off with this shit....I'm getting scerrd and I'm not even turboed yet

Don't do it! Step away from the crack pipe (boost adjuster)...

Just go read about Paul's 300+ rwhp motor on stock '99 internals and you will feel better... at least until your motor blows up :giggle:

No kidding. This car pulls very well at 11. I ran it at 15 for a day and that was wicked. The LAST thing I want to do is turn it down.

I'm pretty sure your turbo at 15psi would flow enough for 300whp....damn that must have felt great

I'm skurred now too, lol.

LoL that explains the noise matt.

definitely have to invite me over when the new motor is in :D

dam i know how you feel i did the same thing with my 99 miata

New sig pic.... just for you Matt.

^^ LOL awesome. Damn it, I wish I had thought of that one.

best signature ever.

this one might be a bit over the line... but I think it's funny.

*edit* failure to attach image.

This is starting to scare me too. This year, i am going to do this to my motor. One way or another, i am going to force myself to put in a built motor.

This reassures me that playing it safe (or being a pussy) and staying around 200whp is a good move. On my stock rebuild anyway. All of this blowing up talk lately has me spooked.

sig copy cat hhahahaa

poz rod, lol.

Happens in 3's - already happened. THE SAME DAY Matt bent his rods, we had an MSM bend two rods here too. Then ZX-Tex blew his. Hopefully, there are no more!
Stephanie

One of mine bent mid last year... No signs of detonation, hydrolock, etc., and no recent hard driving. And the rod bent when I was attempting to start the car... How exciting.
Maybe Mazda built all of their rods at once and there was an expiration date we weren't aware of? lol

Or maybe the peak cylinder pressure is just a bit too much for the pencil rods?? Try an FE3 rod/block/head, barely longer stroke, much bigger bore, much stronger longer rods, perfect. Where is Rob's sig when you need it?? :-)

Fred.

Stephanies pics were of my car. I thought Matt was a nut for having a blown motor. Shows what happens when you think! 17lbs of boost bent rods 1 and 4. The pistons looked fantastic, just a nice hue of bronze with minor carbon build up. In fact, they are on there way to the Domican Republic now! I kept #4 rod for posterity's sake. It was shortened by 1/8 an inch and slightly twisted as well. I got Wiseco 9.0's and Eagle Rods from Alamo Autosports and now I can really turn it up. Woohooo!

Wow, all that carnage.

I'm so glad I just bought a little bitty turbo and don't plan on seeing much more than 200rwhp(if that).

Im running 275hp at 15psi on stock internals and have no problems. Pauls been running The Machine at 300hp/15psi for well over a year now with no internal problems and in october he turned it up to 311hp. Still going strong.


You can't run a car at 13psi with a 12.6 afr. Thats way too lean. Why wouldnt you just tune it for 12.1 afr instead of pushing the car more?

austin crew + alamo crew in the hizzle, for shizzle.

Do we need to meet up?

For shizzle, nizzle. Give me about a month. I'll have the car back on line, and we can all meet up for my dyno tuning session. Of course I am not sure if BEGI's dyno can support a weekend tuning session.

Steph, think you guys might be up for a Saturday dyno day?

Hopefully I'll be back in Dallas kickin it with Caviar and Cris by then...and we do we need a dyno session? Why not beer and ALMS or something on TV?

Or even better, meet up for a track day at Harris Hill?

Dyno session not necessary. Hanging out somewhere or Harris Hill could work too.

Most likely. Just needs to be scheduled in advance. :)
Stephanie

Matt said he was going to do a dyno day in Houston when his engine is broken in. We are going to try an organize one for march or April too.
Stephanie

Ahh you know I did not think about the break-in period. OK so March will probably be more like it for my dyno session. I will have to force myself to unplug the EBC until then :giggle:

Stock internals: http://www.miatamx5.com/check.gif
15+ lbs of boost: http://www.miatamx5.com/check.gif
over 300rwhp: http://www.miatamx5.com/check.gif
highway pulls to 150: http://www.miatamx5.com/check.gif

bent rods: Damn it, I knew I forgot something

For real. I don't' know if these bitches can't tune or if you got a factory freak for an engine. I think they all ran too lean at full boost. Paul, what AFR do you run at full boost?

Wow!

Pat! Get on Aim!

Only if 11.6-12:1 is 'too lean' at 15 psi, at least in my case.

That'ts probably ok, though your spark table was, IMO, a bit aggressive. My motor would knock with that much advance in boost. I'm running 11.5:1 by 11 PSI, and 11:1 if I were to run 15. FWIW, I heard Matt was running ~12.8:1 at 13 PSI. Too lean IMO.

Hmm... I did not think it was that aggressive in boost. It is a few degrees retarded from what Paul said he was running in the famous timingz thread from what I can tell. It is much less aggressive than the map Ben posted, and less aggressive than several others in that same thread.

Anyone else think my map is over the top?

I thought you were running Ben's map. Whoops. Your map is very conservative in low boost. I run 5* more than you around 150kPa, but in high boost, toward redline, you run more timing than I. Curious, about what RPM did the motor go boom? IE-4k at the onset of full boost or were you about to shift and then pop?

It was at the upper RPM range, probably above 5K, maybe 6K.

And you don't know for sure what the peak overboost was- right?