Mahle racing piston/ cyl set ?

[Drdogface]

Trying to sell some stuff a friend had. He had a stroke and will never drive again...sad story that many of you know

Anyway, he has a set...NIB... of Mahle 100mm racing pistons and cyl for an 84-86 Carrera that he never even took out of the box. I have them listed on eBay but would like to know what HP you'd get with them installed in a good tight engine. That would help with the eBay ad.

[intakexhaust]

Mark- I don't know if this helps and of course there's many factors. Mid-80's Ruf Mahle kit with 98mm / 10.3:1 compression ratio, Ruf's ECU and exhaust they claimed 260 hp DIN.

(If its OK with the rules, perhaps you can post it in the parts for sale + ebay link??)

[svandamme]

Well it all depends on what kind of crank, exchaust, heads , inlet and fuel system is going to be used
And what compression the engine will have after install..
Cylinders & pistons are but one part of the equation


It's going to be a really big ball park to throw figures around

[sc_rufctr]

Originally Posted by svandamme

Well it all depends on what kind of crank, exchaust, heads , inlet and fuel system is going to be used
And what compression the engine will have after install..
Cylinders & pistons are but one part of the equation


It's going to be a really big ball park to throw figures around

With a stock crank on a 3.2... What would the displacement be with 100mm pistons?

[svandamme]

74.4mm stroke and a 95mm bore is 3164 cc
74.4mm stroke and a 100 mm bore will be 3506 cc

a great deal will depend on what compression those pistons have and what kind of heads (ported, twin plugged, intake size and fuel system)

[Drdogface]

Thanks for the help guys. I personally dunno all this tech stuff as you can tell. Just tryin' to help Doug's family. His 911 sold as did his Hummer. House will go to a short sale. Some furniture also sold. Only these P&C's are left. I'll post all this on Parts for Sale and incl the ebay ad. Somehow I think it'll be a tough sell.

[BGCarrera32]

100 mm on a 3.2 = 3.5 L

I'd start by finding out what the set lists for new from a retailer that moves the most of them, then take pictures of everything and post them to a photobucket etc.. Nobody will want to cough up that kind of money only to find you scratched a cylinder or dented something from inattentive packing. My guess is you're North of $3k on these if they are really NIB w/rings and wrist pins.

[Drdogface]

Thanks for those suggestions BG. I have looked them up and they retail now for about $5700. All the pics I have are on the ebay listing. Wrist pins are all there. I offer a three day return. I do agree it's not likely to find someone who wants this exact set but the box was unopened when we removed it from his garage. I just had to unpack to take pics and return them to the original packing. I started the bidding at $3K..

[BGCarrera32]

Sounds like you're on the right track, good luck on the sale, and good on you for helping the guy out.

-BG

[Drdogface]

I have a nibble on eBay but he wants to know the compression ratio. I guess I should write or call a supplier but thought one of you guys might know ?

[svandamme]

any part numbers on the box?

[Drdogface]

Not on the box that I can easily read...faded over the years, but on the cyl's so I can go from there. It's shown in the ebay ad I think... I'll look at my copy and enlarge so I can read and then edit this post to give it... Stand by

[Drdogface]

OK...here's a screen shot. Not all that easy to read. I don't have them in my possession at this time but they are at a friend's home...I can go up and see if I can read it more clearly if need by... What do you think ? I'm just guessing that this is the part number..

[svandamme]

The cylinders don't matter, 100 mm is 100 mm

it's the pistons that make the added value.

[Drdogface]

Well, I guess I understand that but I would have thought that these always came as a set with part number designation. I'll try to find them online at some supplier and go from there.

[johonmirae]

a great deal will depend on what compression those pistons have and what kind of heads

[Drdogface]

Understood The heads are stock...or at least I didn't find any others in his shop and it was thoroughly searched.

[Drdogface]

I have a call into the Porsche guy at Mahle in Tenn. Hopefully he can answer the question if I give him some numbers. I was referred to them by a tech at a Mahle distributor in Nv.

Another number I found on the box...just a yellow sticky note: 911 103 100 23

Maybe this will mean something to one of you guys Thanks again to all of you for trying to help out... Pelican forums are fantastic...

[Drdogface]

Best info I found so far from EBS Racing is this:

EBS Racing - Porsche Parts Exclusively

While these are 98mm it's 9.8:1 Compression.

[Drdogface]

EBS says they were discontinued for some reason but would be 10.3:1 Given that and that he was going to use stock heads, what HP do you think you'd end up with.. ?

Guy from Mahle just said 10.5:1...