IcemanG17

I'd also go the stroker crank from Moldex......$2500 is probably 1/2 was Porsche wants for a GTS crank

Cheburator

Cost of a new crank from Porsche - £4500 ($6750) in stock
Cost of a welded crank by Moldex - $375 2 weeks turnaround
Cost of a Porsche reconditioned crank £1850 ($2400) lead times unknown
Cost of a Moldex GTS crank drilled like a Chevy $2750 - 14 weeks lead time

All other bearings are good with no scratches. Looks like a welding job at the moment. Moldex claim that the crank should be as good as new? I dunno... At the end of the day, it is in his interest to sell me a new crank, but he said there was no need???

Rob Edwards

Does yours look about like this?

Jim Morton

Cheburator

Assuming your crank damage is scoring on bearing and the crank passes a magnaflux type inspection, you should be able to have your crank repaired as is likely the Moldex "welded" option.

Be advised that 928 cranks are flame or induction hardened. With the welding of one lobe, most crank folks recommend gas nitriding the whole crank as a means to get the surface hardness on the repaired journal. With this method, all journal need pre heat treat preperation. I would make sure any quote from a crank repair shop / person includes a magnaflux inspection, repair and post repair heat treat.

As $0.02, I have a repaired, nitrided crank in my DD BMW M5 and it's gone 20K miles since repair and is working fine. Last year, I repaired a 928S4 crank using this same method.

Best wishes which ever way you go.

Cheburator

No idea yet. Will get pics from the shop where the car was taken apart in the next few days. Will post them then for a post mortem.

cold_beer839

I'd stroke it, but I'm a redneck that likes beer and loud cars.

namasgt

Cheburator

I remember a year ago Louie had a GTS crank for sale, it might be still for sale.

https://rennlist.com/forums/928-foru...d-pistons.html

docmirror

I've used welded cranks in air cooled VWs for years. The technology is good, if the person doing the work is skilled. As with anything else, it can be screwed up too.

Note the color heat treating changes on the journal throw. After the crank journal is built up, then it is machined, then heat treated again, and final machining it should be good as new. I was going to do this for my GT crank but I found a used one for pretty reasonable.

James Bailey

Note that Moldex ALWAYS quotes 14 weeks.....always no matter how long it really takes. They do much custom work for Detroit and when Ford wants a crank......Ford gets one The Porsche crank gets set aside

shaaark89

i have a gts crank but i'm honestly not sure what condition it's in. it's been sitting in my garage for the last 5 years. got it with a bunch of gts parts that i picked up from my mechanic. i would be happy to have it checked for you if you tell me what needs to be checked and where might be the best place to check it.

123quattro

Used cars can run for a very long time.

Lizard928

Welding when done properly will not induce stress risers, and will not have any risk of breaking.

928mac

You would be much better off to get another used engine until you decide what to do with this one.

You could help this Rennlister out and get a engine at the same time

https://rennlist.com/forums/928-foru...ercharger.html

Chuck Z

You've got the last GTS engine EVER? Special pistons? Special sleeves? 2R rods? What's the question again?

Buy a Porsche crank......!

blown 87

I am with Greg Brown on the welded cranks.

Maybe some can be just fine, but no way would I run one.