So, is this what 2.7RS pistons look like?

Jim Richards · 12-27-2003, 06:18 PM

I received a set of Mahle 2.7RS p/c's (8.5:1) for Christmas and, when I looked them over, I was expecting them to appear different. From a pic I've seen in Frere's book (pg 46), and from my shop manual, I was expecting a much higher dome and deeper pockets. The dome on these pistons is only a couple of mm's. Am I obsessing over size? Thanks!

Tim Walsh · Tim Walsh's Garage

Jim,
Even the 2.2'S dome looks small for 9.8:1. The only think that looks "good" to me is a set of 10.5:1 JE's that I've seen. (I might be running then if my new job comes through). I really suprised when I first saw pics of those too.

YTNUKLR · YTNUKLR's Garage

Yep, they're supposed to look like that. 8.5:1 is nothing.

jase007 · jase007's Garage

Jim:

u lucky dog!

I should be able to get a comparable picture tomorrow in our shop. Santa brought me a nice new digital camera and I'll be snapping lots of photos.

Will get back 2 u .

So... when is the engine drop????

Jason

Wayne 962 · Wayne 962's Garage

They are indeed, low compression pistons...

-Wayne

Peterfrans · 12-28-2003, 03:17 AM

They look the same a mine, not a very high dome, but 8.5 isn't that much.

left to right 2.7RS, 2.4T, 2.2S

Jim Richards · 12-28-2003, 03:48 AM

Wow, I'm so surprised. They really look underwhelming. I guess all that really matters is the HP after I upgrade my 73E engine to RS specs. Thanks guys for your great feedback!

Doug E · 12-28-2003, 05:50 AM

Jim - looks good. So are you going to have these installed and ready to go for the first DE ?

Jim Richards · 12-28-2003, 05:54 AM

Aaah, no. They will have to sit in their box until that last 2004 DE. Then they can come out and play.

Doug E · 12-28-2003, 04:34 PM

Say whaaaaaaaaaaaaaaaaaaaaaaaat ? I'll put $1 down right now that says sometime prior to next winter those puppies are in! As you know, you have some pretty persuasive friends here in NoVa