mikef85

iTrader: (7)

Let the picture speak for itself

patsmx5

iTrader: (16)

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

mikef85

iTrader: (7)

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.

patsmx5

iTrader: (16)

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

mikef85

iTrader: (7)

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?

patsmx5

iTrader: (16)

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.....

patsmx5

iTrader: (16)

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?

mikef85

iTrader: (7)

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.

mikef85

iTrader: (7)

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.

M-Tuned

iTrader: (6)

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.

mikef85

iTrader: (7)

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. Some more significantly then others.

EDIT: Dang it, 300 posts.

Savington

iTrader: (31)

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

patsmx5

iTrader: (16)

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

patsmx5

iTrader: (16)

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

patsmx5

iTrader: (16)

Post *****.

samnavy

iTrader: (7)

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.

mattkock

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!

y8s

iTrader: (8)

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...

Arkmage

iTrader: (3)

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

hustler

iTrader: (6)

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