group 4 cam murena 2.2L

[Oskar]

http://www.leboncoin.fr/vi/10949514.htm?ca=1_s

[Anders Dinsen]

That is a hot cam, probably due for 160 hp if properly set up - or more, if you blue print the engine to rev to 8000 rpm and prepare the head carefully. In ideal conditions, this cam will probably show maximum power at 9000 rpm!

Compared to the S-cam, this one has 20 degrees longer periods and almost 20 degrees more overlap. Compared to the Holbay, it's not that different though, mostly with higher lift. But the timing is different, with the overlap slightly shorter and inlet period slightly longer. It will probably spit back more in the inlet at low revs than the Holbay does (rough idle), but also produce power further up in the rpm band. And lift is higher, so if the conditions are otherwise perfect, this cam can flow more air than the Holbay.

Well spotted, Oskar!

[krede]

9000rpm...
My engine sounds like its gonna blow up any second when I pass 5500!!

OMHO you will NEVER get a murena 2.2 engine to do those sort of revs for any period of time regardless how much you spend on it.

[Anders Dinsen]

9000rpm...
My engine sounds like its gonna blow up any second when I pass 5500!!

OMHO you will NEVER get a murena 2.2 engine to do those sort of revs for any period of time regardless how much you spend on it.

Why not?

Race prepared Honda K20 engines reving to 10000 rpm and developing some 280 bhp last 1000 km before needing a complete rebuild, including new head and pistons. After some 3-5000 km they are scrapped. I don't see, however, why a Murena engine shouldn't be able to be prepared for the same if it's done properly and you have unlimited funds.

My engine sounds like music when occasionally rev'ed to 6500

[Oskar]

my revmeter wont pass 4000.  I think its broken or french