blackbenzz

After my motor blew 2 days ago I think I found the limit of what a 55 NA block can handle. Rod snapped and lodged a piston in the cylinder. The rod made a huge hole in the bottom of the block and all the way up both sides of the block. It puked oil onto the tires goign 100mph down the track. Luckily I was able to keep it out f the wall. I will get better pictures after I pull the motor out in the next couple days.








I'm probably going to do a full build this time because I don't want to risk my life again with a stock NA 55 block. 10.09@138 was traction limited best time. 6.29 60 to 130 on bias ply tires on flat surface and best trap was 138.71.

Now what would be interesting is to drop a stock 55k block in it with the exact same mods/setup and see what happens. I don't want to spend that kind of money just to see the limits of a 55k block. If someone has one laying around and wants to donate it in the name of science I will throw it in and head back to the track in the next couple weeks. Just thought I'd throw the idea out there

Denroll

Not a block, but I have a set of heads sitting around down in Houston, just waiting for someone to get them ported.

blackbenzz

Thanks. I will start pulling the motor tonight and tear down the motor this weekend. Will post pics along the way when I remember to stop and take pics lol. If I got reallly lucky the heads are ok and the valves are just bent in that cylinder. Not likely though. These heads were ported

chiromikey

Damn brotha!

I've got a running long block minus cams but number 8 probably has ringland issues. I was going to get crazy with it but I'd let it go for cheap if you can't find anything else.

Mitch Detailed

What is the analysis on why the engine failed? revving high/fatigued rods? more power than the rods could handle? any detonation or excessive timing?

What are your options for beefing up the bottom end? I read on eurocharged's site about how they got darton to sleeve the block.

Worthwhile investment for rods, pistons, and sleeves?

HeissRod

Spectacular carnage

blackbenzz

Thanks, I will keep that in mind
The motor blew about 48 hours ago. I have not had time to tear it down yet and inspect it. I have looked at logs.

I've had a block at Darton for almost 2 years now lol. It might be time to pull the trigger. I'm not doing anything until I pull the motor and tear it down and assess damage.
I was actually smiling when I saw it on the lift. I was thinking that is so badass! Can't wait to pull it out and make a table out of it!

Mitch Detailed

I'm interested in the cost of block sleeving services if you do pull the trigger. :click click boom:

blackbenzz

I forget the exact number but it wasn't cheap! I will let you know when I check on pricing again

justinwrock

You accepting donations?

Thericker

I was thinking exact same thing, luv the Spartan worthy utter massacre.. Either plexi or regular glass coffee table in order here. Imagine how proper it could be, if possible a picture of the car going dwn the track when it blew it's bags & the Time Slip laminated inbetween glass layers, with 55 ////AMG RIP & date etched in glass like a tombstone...:

Edit: Contact/get Juicey63 to setup/manage large donations

Crissus

Interesting... it somehow looks to me as if the piston seized before the rod broke apart.
I have had the exact same issue on my M119 V8 some years ago... It seized because of excessive fuel in the cylinder and as a result the piston got stuck and the rod broke apart, braking a hole into the block/oilpan.

Sir-Boost-a-Lot

iTrader: (1)

Crissus I think you're correct. A lean condition can cause the piston to expand and seize in the bore, leaving the con rod to be 'drawn and quartered'

Whatever happened, I agree that the carnage should be put on display somewhere to be admired and discussed.

blackbenzz

Lol you have a motor?
ye athat would be badass!
Excessive fuel or not enough fuel? The log shows a lean spike and 28 degrees of timing. Dunno if that happened first or was a result of the carnage.
Should I start a new thread or just post what I find in here for discussion?

Worked on the car a couple hours tonight. Pulled the sc, condenser, radiator, drained fluids, etc etc.

Pulled SC and found something wrong...



Closer look of the new sunroof in the valley!




Ported heads seem to still have all the intake valves... Will have to wait until head comes off to see about the exhaust valves.



Hmm what do I do with this thing?



Remote mount supercharger!!!




More updates tomorrow night...

HeissRod

Now that's how to keep S/C heat out of the engine bay!

Sir-Boost-a-Lot

iTrader: (1)

Maybe you're onto something. I see a supercharger in the trunk with a belt spinning off the driveshaft and the outlet plumbed back up to the engine like the STS turbos. Ambient IATs?

blackbenzz

lol
Patent pending lol

HeissRod

But it has to have an electric clutch like Mad Max.

N_Jay

I'm thinking that might take a little more than one tube of JB-Weld?

kittyandgary

Did a little leg (actually finger) work for you. About 10 5.5 liter Kompressor engines listed on e-bay from $2500 to $4K range. Here's one starting at $2500 with a 60 day warranty.

http://www.ebay.com/itm/MERCEDES-W220-W211-W219-S55-E55-SL55-CLS55-ENGINE-MOTOR-SUPER-CHARGE-TURBO-OEM-/171308046637?pt=Motors_Car_Truck_Parts_Accessories&hash=item27e2c1592d&vxp=mtr

blackbenzz

Lol
Dammit, I only bought 1! I thought 1 and a little buffing should do the job. Now I have to go back to the store
Thank you. I saw that one with 155k miles. If I'm building a motor I already have a 55k block at Darton. Was just willing to do the labor to throw in a 55k block if someone wanted to see what it would hold.

N_Jay

I am not sure what the "science" part is?


Are you expecting to extract some meaningful data from the destruction of an overbuilt old motor with unknown history without having some significant amount of measurement equipment on it during the failure?

blackbenzz

Science as in testing a hypothesis. Hypothesis is 55k motor can hold more power than NA 55 motor. Perform an experiment to either accept or reject the hypothesis. The variables I listed... 1/4 mile, 60 to 130, dyno, etc etc.

By the way I log the runs. Plenty of data. I'm not sure what isn't scientific about it . People ask all the time "I wonder how much a 55k motor will hold?" So I offered to find out. No experiment is perfect especially with the budget we are talking about here. But it will be fun and give input on the subject. As far as I know nobody has tried.

If you have any other science questions let me know. I happen to be a scientist.

N_Jay

Sample size is too small

blackbenzz

Where did you see me state that the experiment was statistically significant?

N = 1 is > N = 0