eekk thats alot of dough for a motor, let br build your motor.

 

Not sure if you found the "reason" this happened, but even if your alky did fail, shouldn't you have been fine since this hapend at 21psi as you stated above??? Hope all works out well, good luck with the new setup.

 

If the motor was overstressed it could have let go at 21 psi, 50 psi or even vacuum. As has been speculated this does not seem to be the failure of his alky injection system.

 

so no one can explain what might have caused this failure??? I'm thinking rod bolts let go..

 

I can't remember what was said at the very beginning, but was the motor completely warmed up?

When was the last time you hit full boost and were at 100% WOT? Was it all in that same trip?

I'm asking because my buddy with a 2g dsm a few years back was racing his car and it did fine one night and even got him home. The next morning when he tried to start up the car, it wouldn't budge.

My point is that HIS car just let go when the car was no longer warm. Maybe yours was a similar situation.

 

Don't you generally have to provide them with an undamaged core? May be difficult for him to do that especially if his has a big whole in the side of the block.

 

So far I've come across the following opinions / theories on why this happened. (All possible, just listing them. No need to flame.)

1. Bad Tune - unlikely because it would have blown during the tune or on the way home.

2. Meth Inj system failure - Nozzle looked okay, tank was full, pump works, had safegaurds, etc.

3. Timing Belt Broke - ???

4. Rod bolt broke - ???

Other issues?

How does the water pump look?
How does the drive belt look?
Fuel injector issue? (Stopped spraying?)
How does the oil pump look? The oil pump isn't driven off the drive belt, so this could explain the torn timing belt!

I know AMS is great, but you should pull the maps and compare them to someone with a similar setup.

I'd also like to know what 98auto said about the last time the OP had seen full boost before the blown motor.

 

I know Hawaii has a bad reputation for bad gas. Another possibility... What gauges were on this car? Any CEL's or Oil Pressure light?

 

hawaii has a bad reputation as does my country

 

the car was just in a front end accident too, maybe the oil pump was damaged then...seems unlikely but another maybe.

 

Normally you don't break rod unless the thing was over rev'd and stretched a bolt/stud or it wasn't torqued properly in the first place.

There are no signs of bearing failure and the plugs look fine. Odds are something let go on its own or because it got stressed.

 

the bearings dont show any signs of heat, so you didnt starve it for oil.

the bearing wasnt black, so hard running with cold oil wasnt a issue.

i only have 1 pic with a rod bolt & that bolt part has rthe nut on it, which is good.

where is the other bolt? was the nut still attached to the bolt piece too?

did you ever hydrolic the engine? such as loosing spark @ high revs while pumping loads of fuel for any period of time...

how do the other rods look, with regards to being straight?

since you have the motor apart, take the 3 remaining rods to a local machine shop & have them check them for straightness. they dshouldnt charge you more than 25- to do so. it will just give you an idea to what the other rods were seeing for stress.

 

well, i don't exactly have the motor apart yet....i just pulled off the valve cover and seen everything you see in the pictures. my motor is still in the engine bay but i have yet to actually rip the motor out...

today im gonna take apart the head. again, ill take more pictures to further figure out why exactly the motor blew.

im beginning to think that the cause of my blown motor was from detonation....

i've also noticed that the "half-rod" i managed to pull out was at a slight angle...ill post wut i mean later on tonite.....im thinking the detonation caused the rod to travel backwards and then boom! catastrophic failure....

dunno if it's right but like i said, ill post a picture of wut i mean and everything else i disassemble.

 

Holy crap..............what a BS thread.

Sorry but I couldn't even read past Page 2 of this mess.

There is absolutely NO proof of detonation, NO proof of an alky failure and NO proof of anything being wrong with the tune.

Other vendors jumping in here trying to sell better meth kits is flat out horse shi t.

All you know right now is there is a rod through the block. That's it. I say the engine did not fail from anything to do with the alky or tuning.

Tons of stock rods/rod bolts have failed. From the looks of the picture the rod bolts aren't attached anymore, that should be a pretty good sign to anyone that more than likely you had a rod bolt failure that led to the rest of the mess.

Looking at the pictures posted on page 11 (I saw mention of more pictures as I was typing this and went back a page) you can see the destroyed rod bolt in the picture.

The rockers being off are super simple to explain, the rod broke, the piston hit the valves and that knocked the rockers off.

A set of ARP rod bolts probably would have prevented this from happening.

 

I agree that the rod bearing does not appear to be damaged pre-failure. Typically detonation would crush it and in many cases it would turn in the process. The pics do not indicate this is the case.

The pistons may tell the rest of the story.

What is the rev limit set to?