Anyone using "other" pistons in their Murena?

LarsB · December 05, 2006, 06:41:09 PM

I recently found this great 505 forum. (www.505turbo.com)
One or two of the members there were using pistons from Volvo B230FT. (96mm) I would like to know if anyone have tryed this on the NA Murena engine. I think we might need pistons with higher compresion hight? Any ideas?

kind regards
Lars Olav

krede · December 05, 2006, 07:12:52 PM

Hey lars, Im in that forum too.
If you read carefully you will find that there is quite a bit of modifying to do to the block and rods to make it all work.. and V-M's big engine project hasnt been without its fair share of trouble.
The murena pistons are quite inexpensive, wheres the 230ft are not.
Further more I believe the volvo pistons are of the "domed" type, and intended for turbo use.

Dont get me wrong though. I am looking for alternative pistons myself, but for the turbo engine i am building.
If i had to buy pistons for my n/a 2.2 i would go with either the standard ones that readily avalible, or with the coshworth forged ones from politech

LarsB · December 05, 2006, 07:52:17 PM

I realice that some modification to the rods is needed, how ever my main consern is the compression, or rater the lack of compression.

I am looking into using pistons from the B230F (non turbo) These are cheaper, and also (I think) better suited for NA applications

other concernes I have is that the Murena head might not be able to flow enough air to fill the larger cylinder.

The pistons from Simon Auto would cost at least 1500kr a pice, in my oppinion not inexpensive

Lars Olav

krede · December 06, 2006, 05:57:08 AM

http://cgi.ebay.de/Kolben-Matra-Murena-Talbot-Tagora-NEU_W0QQitemZ110064817013QQihZ001QQcategoryZ18327QQrdZ1QQcmdZViewItem

Think 90 euro + freight for a complete set is expensive?

LarsB · December 06, 2006, 03:33:11 PM

Thank you, I might actualy bid on those pistons.

the pistons I found to expensive was from Simon Auto

krede · December 06, 2006, 04:41:25 PM

Simon used to have a similar add on e-bay... thay didnt cost much more.. are you sure the price you found wasnt for forged pistons?

krede · December 10, 2006, 07:42:36 AM

Simons pistons are on ebay now.

http://cgi.ebay.de/Talbot-Matra-Murena-2-2-Tagora-2-2-Kolben_W0QQitemZ180061918348QQihZ008QQcategoryZ76043QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

Natron037 · January 11, 2007, 04:19:31 AM

What about air cooled VW pistons? They have a 22mm pin..what's a 2.2 murena??? There are 2 different compression heights for stock or stroked engines, they are available in 90.5, 92, 94 mm bores and are VERY cheap for FORGED pistons. Just a thought.
Thanks
Nathan