725whp on a civic aint bad.

 

I agree run 9:1 with pump gas is the save was man just for the fact that there is a little room for these type of problems Im not saying that high com. is not the new way but there is 0 room for detonation and you have to have a great tuner

 

Im looking at the pic and i dont see a chunk of piston missing.

But to be on the safe side, I would have the sleeves rehoned, new rings and pistons inspected.

Sad you had to learn the hard way. IDK if your shop knew you were adding boost, but a typical 11.5 CR is fine on 93 pump.

So now being you need E85, what size injectors are you using? you may need to upgrade those.


If your "tuner" didnt know Tial had different springs, then he sounds like an idiot with a laptop, not a tuner.

 

starting to believe, dude has no real world hands experience.

 

Yeah I don't know, I am not saying you can't use higher compression pistons and run boost because there are guys out there doing it right. However, with the turbo this guy is using he could run 9:1 compression and still have plenty of low end power.

 

Bunch of girls in here. You can TOTALLY run that much boost with that compression on 93 octane(Albeit, i would use Ethanol personally). Boost is irrelevant. Sounds like it would be around 400 with moderate timing and leave it alone. You start playing games and adding more boost and HORSE POWER...thats where you will destroy everything. MODERATION people.

You definitely need to re-hone, you could easily save that piston.....but you may have the budget to just replace.

What about valves?

 

^^^Best advice given.

 

Supertech pistons are made of a forged setup that shouldn't expand that much.. i usually recommend those types of pistons for street type cams. This usually helps with some nice P2W clearance and very minimal slap, if any, if the setup is properly built. That p2w looks alittle tight.. how do the others look?

Spoolin Hit it on the head, as well.

 

Took the pistons out finally. I am working with supertech to determine if these are completely scrapped. So when I took my pistons and rods out I noticed that the bearings look strange. Are these normal looking rod bearings? (1000 miles on them N/A and a half a day of dyno time with the turbo.)

 

Oh they knew I was adding boost. I discussed the entire build with them multiple times.

 

So I don't know much about reading bearings, but just from reading this, that looks like poor lubrication damage.

 

dam theres the missing section haha

 

As a Tuner, You hate to see this. You hate to see someone's name get drug through the mud or even the thought that it was "the" tuners fault.

The bearings are shot, that's not normal, those outer wearing is from the pinging beating down. It also looks like they "may" have been too tight..

Your P2W was too tight but according do those ring lands and side shots, the car was ran too lean, or too much timing or a combination of both.

I wouldn't even worry about reusing those pistons. Scrap em.. make a cool table, thats about all their worth.

Here's a question Do the rings on all of the pistons move freely? If not, to give you an idea of the amount of force during pre-ignition or detonation that movement of force is actually compression the piston, and the piston is on the losing side of that battle.

 

do you think the bearings did this when the pistons started dragging in the cylinders?

 

No. This happened after the fact. P2W doesn't do that to bearings, least, not what i have seen. Every tuner, or engine builder will experience something different, and there are others out there that know more then i do.. But i will say I know that isn't from tight p2w.

 

Ok so first of all I didn't drop any names! But I am seriously thinking about it as their mistakes keep adding up for me financially.
Second: Wouldn't bearing damage caused by the detonation only be evident on the top bearing half?

 

whats the crank look like?

 

The crankshaft looks fine. Also the the bearings feel smooth to the touch. They look almost like a coating was flaking off or something. I have never seen bearings look like this though.

 

u can kill engine bearings with a bad tune (detonation)

 

looks like det and tight clearances. For the bearing damage


Or really dirty oil. How did you break in this motor?

As for the pistons Post a better pic of the skirts. The top of the piston Is smaller than the skirt so that shouldn't have rubbed the cylinder first. Looks like it melted a bit then rubbed the cylinder.

Post your fuel and timing maps.

 

Also, pics of your thrust bearings?

 

I would be interested in seeing your maps too, especially the timing maps.

 

It's obvious the engine saw too much timing for the fuel used. The piston skirt looks fine so PTW clearance is OK. This is a clear case of detonation damage especially when damaged is found on the intake side of the piston...

 

The crankshaft looks fine. The piston skirts also all look fine. I used straight 30 weight to brake this engine in and then moved to good ol castrol 10w40 which I have used for years on all my Hondas with no issues. I replaced that with royal purple 20w50 when I installed the turbo as per the engine builders recommendation.
I talked to the engine builder and the tuner today. Again they both affirm that the specs I was running were perfectly safe and common practice. That all of the clearances were checked and proper assembly procedures were followed. I ran the engine for 1,000 miles on my NA map before I installed the turbo kit. They insist that the damage occurred before I installed the turbo and before I went to the tuner. The tuner also claimed the if any detonation occurred at all it would be easily detected on his dynapack dyno. A dyno can detect detonation?
Thanks for the input so far you guys. And if you know any reputable machinists in Texas please let me know. I'll post my tune as well.

 

Why can I not post an Smanager file here?