Compression results are in :(

Crompression results are in adn it doesn't look good.

in 1,3,2,4 order
180, 180, does it even matter, 70

 

wow...sucks to hear that it is what you thought.

PM when you're working on it and I'll come by and lend a hand

 

why 2? odd

 

it was 4. I figured why bother testing 2 when 4 was at 70.

Compression testing a hot motor = pain.

 

I'll probably pull the engine tommorow if I can find a beater.


There is a Justy on Craigslist that I was thinking of getting even before this happened.

 

ah ok. figured you would have just started on cylinder 4

 

Man mike, that sucks. Sorry to hear...any thoughts as to what caused it or what it might be? Are you thinking head gasket, rings, piston, what?

 

doesn't look good bro......im thinking rings maybe!!

 

Wow Mike, that sucks and sorry to hear. What kind of pistons/rods do you have in your motor?

 

I had 60k miles on the motor so it was only a matter of time. Forged pistons don't last forever.

 

sorry to hear that. let me know if you need anything

 

Yeah sorry to hear this man...maybe I'm glad I didn't stay longer

 

fail bro. well, just build it better and stronger this time

 

oh well can only get better from here

 

+ 1 ^^^

It was still freakin awesome to see your car on the dyno though.

 

60K is pretty good mileage out of a built motor, if I remember correctly you had CP pistons in that motor. I would be pretty happy with that you can't expect much more.

 

like I said, I can be there for help while I have all this free time...just say the word.

 

I'm just down the street and I need something to occupy myself with.

 

This sucks.

Boosted H6 time!

 

Mahle 4032's with stock rods.

 

I didn't realize you had 60K miles on those pistons.
That's a good life out of those Mahle's.

 

I have 120k miles and I put them in at 70 so its actually only 50k but that is still not bad. They lasted the same as my original 2.0 where as the stock 2.5 block only lasted 20k

 

what did you run on the 2.5 block? Im at about 30k on my hybrid, should I be worried?

 

:rofl:

he make's POWA

 

I think running a nitro / meth mix was the death of my stock 2.5

 

o ok lol

 

And actually my car's making more than yours right now, until you get tuned, and more than 80% of the cars that Dyno'd yesterday :fawk:

 

Mike you said you think nitro/meth killed the car. When you say nitro/meth do you mean nitromethanol or you mean meth in conjunction with Nitrous?

Also Mahle's going back in or some CP's?

 

I ran a mix of nirto and methanol with my meth injection. I got up to a 50 50 mix before things went bad.


Here is a comparison I did on back to back runs with the only difference being 100% meth on one and an 85% meth 15% nitro mix on the other.

http://mk.dataoceans.net/public/images/Nitro/nitro.xls

When I was up to a 50/50 mix I was adding quite a bit of fuel to keep from going lean. But alas apparently it was not enough and the stock pistons gave up the ghosts.

 

Yikes.

 

I think the maf was a little past its max voltage . And it was even scaled for a perrin big maf.

 

what was the the A/F when the MAF maxed out? were you datalogging?

 

Time for an AEM

 

Sorry to hear about your car Mike, I know how you feel. If you need any help let me know.

 

Matt what does not having an AEM have to do with this?

 

if its the blue justy in marrietta thats my old one

tougemiata

 

My guess would be the AEM has better maf scaling capabilities, duh.

 

Well duh but Mike was talking about things that happened years ago....not recently

 

what kind of shape was it in when you last drove it?

 

I'm tearing down the block tonight to see what has gone wrong. Hopefully the walls won't be too damaged.

I'll post pics when I get it apart.

 

it was in pretty good shape. Body was pretty straight on it, it was lowered on 175/50/13 sumitumo htr 200 and had a new exhaust on it, but it had cracked at the downpipe. I drove it from roswell to ptree ind daily. But shortly after i sold it he tried to be mr mechanic and did something to it, called me telling me it wouldnt run. He tried to adjust the carb. But i do know he bought another spare justy so im assuming it runs now. I thought about buying it back myself.

http://subarujusty.proboards.com/index.cgi?board=memberjustys&action=display&thread=1283

tougemiata

 

Well Mike how did the pistons themselves look? I saw where you said the cylinders looked fine.

Pics or ban!

 

No obvious damage to 2 or 4 but usually you don't loose the crown so you can't tell til you pull the piston.

I didn't get the heads off of 1 and 3 yet because I stripped the exhaust cam gear bolt.

If anybody close to Roswell has a corded drill and a big bit I can borrow send me a pm.

 

Those bolts are such a pain!

 

Also maybe the pistons didn't crack or die and the rings simply gave out.

 

Pistons are out and the ring land on #4 is toast. It also broke the ring as well which is something I have not seen before.

All the cylinder walls look fine but I am going to have a machine shop check it out and see if it needs to be bored over.

Now that I know the block is ok I have some decisions to make.

 

Actual broken rings are pretty rare and if I recall correctly its usually because tolerances are to tight.

 

bore to 100mm, and drop some more pistons in. can be sure of the tolerances that way