Grinder

iTrader: (2)

It's a great deal. New the RBM3 is 479.

http://www.murnanmodified.com/produc...roducts_id=533

JOE SI

iTrader: (13)

Finally something worked out for me LOL. Is it the 2012 version? I looked and still doesn't have the same head as the one on the site.

FastPete

iTrader: (44)

Want to give a big thanks to Uriah Murnan for a great engine and getting the tune right for me, it was still breaking in and giving me a fit. Hes a great guy, and great support tuned it for 3 qualifiers for me at the Byrons race, Badass motor in my Cobra GT!

Grenade10

iTrader: (40)

Pete, I fully agree, I've used his engines for 5+ years and the have always great power and service. What engine did you run at the Byrons?

FastPete

iTrader: (44)

His modded Bonito

Grenade10

iTrader: (40)

I've got his .25, do you have the .21 or .25? .25 works great on shorter tracks or a lot of infield. 35+21 for faster tracks and a 3 port for club racing. All are good.

FastPete

iTrader: (44)

.21 7 port I believe.

bigbank66

iTrader: (2)

Grinder im running a murnan 353 nova an i need more top end...what temps should i be running this motor at?? Im running a 2660 pipe with the medium header....stock gears on a xray nt1...help please?

Grinder

iTrader: (2)

Temps around 300 are common when getting the most out of the engine. You can also add a head shim. A total of .40mm of shims will help top end. The short 41615 manifold will also increase top end.

bigbank66

iTrader: (2)

Oh yeah an i forgot to add that i run 25% wit 0.50 shims...should i go back to 16% wit a different shim??

Grinder

iTrader: (2)

That's good. Try the short header, and lean the engine until you get the top speed. It's there.

bigbank66

iTrader: (2)

Thanks grinder for all your help....

Grinder

iTrader: (2)

My pleasure.

JOE SI

iTrader: (13)

Ran my new RB M3 .12 yesterday at Floyd Bennett in my new 2012 NT1. All I can say is WHOA it was fast, I had some issues in all 3 qualifiers with little things breaking and screws backing out like new cars usually do. Still managed to win the B and bump to the A, it's my first time in the A main since I started last summer. My car was definitely in the top 5 fastest over all speed wise and the 1st fastest if I'm not mistaking was a RB also. Murman motors for me from now on.
The only thing is I needed a little more down low but it was there and top speed was more than enough, think I'm geared a little off. Any suggestions on gearing?

JOE SI

iTrader: (13)

Ran my new RB M3 .12 yesterday at Floyd Bennett in my new 2012 NT1. All I can say is WHOA it was fast, I had some issues in all 3 qualifiers with little things breaking and screws backing out like new cars usually do. Still managed to win the B and bump to the A, it's my first time in the A main since I started last summer. My car was definitely in the top 5 fastest over all speed wise and the 1st fastest if I'm not mistaking was a RB also. Murman motors for me from now on.
The only thing is I needed a little more down low but it was there and top speed was more than enough, think I'm geared a little off. Any suggestions on gearing?