Duke

After only a few track events number 2 rod bearing failed on my 3.0l 16v turbo engine. I was just going to test the new race car a few times before the winter - when the engine is scheduled for a dry sump... But the bearing decided to take an early vacation last week!

All other bearings looks good. The crank have a deep mark in it so it can probably not be used with porsche bearings anymore.
Not sure what route to go from here. The block is a PD/CEP block with larger head studs, pinned girdle etc so it makes sense to keep the block and do a MID conversion.
...and perhaps offset stroke the crank and do a 3.2l !

refresh951

Sorry about this. What is your redline on this motor? above 6500 rpm? What oil?

Duke

7200 rpm. Castrol 10w/60. I have a big Setrab oil cooler so the oil temp so the temps were low at 95 deg C.

blade7

Ouch, did you hear any big end noise before the bang, maybe the rod broke first, was anything left of the shells ?.

TonyG

That sucks....

TonyG

1987Porsche944WithRealLongName

Grind the crank and do a 3.2

Then let us see how the smaller bearings work out on a proper track

Paulyy

that sucks heaps

do sone of sids custom strokers, i think you can get up to 3.4L out of it.

badcoupe

Have it welded up and stroked a bit. I always drill the end of the crank throw with a supplemental oil hole and have yet to have a failure. Many guys cross drill but I did mine this way so that cent. force pulls the oil out. Def sucks duke, good luck on whatever you decide to next!

TonyG

.... or just stick in a LS V8 engine :-)


TonyG

95ONE

Sleeve it with Darton. - Or a V8.

blade7

Perp drill just on number 2 ?, I considered cross drilling a 3.0 crank but it seems not everyone thinks it's a good idea without increasing the oil pressure.

333pg333

Dry sump = done. Just bad luck that you didn't have the system yet.

Rogue_Ant

Can there be one thread without someone suggesting a V8?

Really.

It is not like the LS engines never spin a bearing, or overheat, or xyz. At least when the V8 guys have issues, you don't see a bunch of spectators announcing that a turbo I4 is the solution. Pretending that the LS swaps don't have their own challenges or issue is just ridiculous.

95ONE

Welll, as a joke. clearly he isn't. I highly suggest WET sleeving from Darton, then turning the boost up to 11.

BUT.. There are too many V8 goofballs in here to let that go.

Duke

Not sure how far you can stroke the 3.0l engine. The crank have 88 mm stroke as is. If you go up to around 92 mm it will gain ~0.1l but I don't have time or energy to experiment right now.

MID's is out of the question according to Chris, the block is too damaged

I'm not totally against an LS-conversion but since I already have everything else for a 600 hp 3.0l 16 turbo it makes sense to get a new block and prep it.
If I would go the LS-route I want new parts, 550 hp MINIMUM, dry sump and all the conversion bit's. But that would cost $15-25k USD as far as I can tell so it's not really an option to getting a new 3.0l shortblock in order.