Ken D

How do these compare with the 104.5mm Mahle pistons for use in Alusil-bore 16v applications? As offered by HMR.

RolexNJ

I was hoping you could enlighten us, as I know that "Raj" refers to you quite often? And your home page link doesn't work too.

RajDatta

What I find interesting in the picture is the dish design difference between the 8 valve piston in the pictures and the one Mahle built for the 968 turbo engine. I would think Mahle piston has the better design because it takes into account the combustion chamber design of the head.
Would like to hear what the experts have to say.
Raj

RolexNJ

Let us know what you find out from these experts. And Mr. Wossner himself? Wow, that's big cheese too!

Ken D

W.r.t Raj, you must be confusing me with someone else.
I can't enlighten, as I'm not familiar with the Wossner pistons; although I did see that Karl (Racer's Edge) is advertising them.

RolexNJ

Hummm. My bad then. Sorry

Cheers.


EDIT: I guess I figured by the the thread below, that you had extensive knowledge on various CR ratios, approaches, and pistons too? Again, my sincere apologies, no harm intended.



https://rennlist.com/forums/944-turbo-and-turbo-s-forum/314967-reducing-compress-ratio-with-shorter-con-rods.html

Post # 10 & 11

Porschefile

Hmm. Not to be a nay-sayer or anything, but I haven't heard of any "revolutionary" aspects of Wossner's pistons. There are plenty of manufacturers here in the US who build excellent quality pistons, and there are plenty of actual long lasting coatings/coating processes that can be used as well. It's been awhile and I vaguely remember the whole ordeal with that particular set of coated pistons and the retailer behind it. However, I have to say that those pistons look like the skirts were just rattle canned black! Seriously though, unless there is some major innovation or technical processes that provide some worthwhile differences with Wossner pistons over the typical domestic stuff, are we maybe just paying for the "exotic" name as if that will automatically make it "better"? These pistons are roughly twice what a custom set would be from a domestic manufacturer, so I'd like to know how they are twice as good?

RolexNJ

So help us? Do us a favor and do some research. Test the S2 head versus the 968. Do back to back tests of Weisco, Mahle, J&E, Wossner (who?) and let the class know what you find out, ok?

Class dismissed...

pk951

Good point, lots of good stuff over here.

RolexNJ

Olli Snellman

Since some of us are living in Europe, european pistons are more than interesting ones compared to US pistons. Mainly because getting US pistons here usually means extra transportation costs, customs fees, taxes etc. So, if we can get a quality product from the other EU country it will spare some €€€€€€€

pk951

How much do piston weight? Here you can check out shipping cost http://pe.usps.gov/text/Imm/Immctry.html

If vendor is willing mark lower price cost on box, you will pay less in taxes no?

Olli Snellman

Of course lower price = less cost. On the other hand if i buy stuff for example from Germany the payment is real easy, i just transfer money from my account into sellers account using internet. Dealing with US vendor means usually hassle with credit cards, sending money to US banks from Europe takes lot of time and is very expensive. Also if there is any warranty issues, it's much more easier deal inside Europe. I have used earlier many top quality US pistons, for example Wiseco, Arias etc. and have been satisfied, other EU countries are just closer to me.

pk951

Makes sense Olli .

Raceboy

Bit of OT, but Olli, it's possible to wire transfer via Internet from Europe to US with normal fee, that is something like 5 eur per transfer. That is when the beneficiary is willing to pay 5 eur too. But, you can transfer 5 eur worth of $ also and be done with it
I just paid yesterday 600$ for G31 snailshell and 931 head and it should show up in US in app. 1 week.
Though, taxes are out of this world....