Matt Romanowski

Broke the crank in my 2270. Broke in the webbing between the rod journals for cylinders 1 and 3. I'll have to figure out what to do know.

SidViscous

WOOF?

You got enough JB weld there? I've got some here if you need it.

Matt Romanowski

JB Weld and West Epoxy.

SidViscous

Cool. Make sure you use something to hold it in place while it's curing.

I recommend a shoelace.

Or maybe a couple of them. I mean that is a high precision part. Yeah and get those nice wide shoelaces.

Rotten Robby

As I mentioned on 914world Matt, I have a 2270 crank on the shelf. It has some cosmetic damage to the journals from an exploded pistons but it looks like you do a lot of modification to the journals anyway... It is at McMark's shop in Sonoma CA and if you want it get a hold of either him or me...

skl

What did that sound like when it went??? What other damage before you could turn it off?? Could have looked something like Vettels Renault when it let go, of course it was probably going over about 4X the revs when it did...

Matt Romanowski

I was coming up the highway hard in fourth and shifted to fifth. Pulled good for a couple of seconds, then it sounded like it went down a cyclinder for about 2 seconds (probably when the crank broke), then it shut off (when it seized the main bearing). I put the clutch in and tried to jump it again and it just slipped the clutch.

There was nothing wrong except for the seized bearing and the broken crank. The heads, pistons, cylinders, rods are all fine. It messed up the dowel pin for the bearing a little bit, but with some ingenuity I think I can save the case.

skl

think magnafluxing it will find the crack???

amazing the rest of held together- good thing you got the clutch in fast!! Or maybe it would have skidded to a stop!!

Jay Gratton

That will teach you to let some bum drive your car for the day!!!! This is how he repays you?

Van

Holy smokes! That's the same DPR crank I have.

How many miles did you get on it?

Jay Gratton

5K maybe, that is a guess Matty.

Matt Romanowski

The crank is about 7 years old. Probably had 60 track events (120 days) and 30k miles. This is a complete guess.

The motor is well built and runs a web 86b/c cam. Never dynoed it, but it was putting out around 175 horse.

Jay Gratton

Wow, I was way off! Matt's car is a stupid fast, he and I both saw 150 at the back straight at the Glen and that was stock brake calipers!!!!!

Matt Romanowski

Posting over on the 914world boards, it seems like broken cranks are becoming more common. I wish it would have happened to someone else though....

Van

Indicated and not with stock gearing, I assume.


I have a factory 1.8 crank if you need it...