Murnan Modified Motors
#61
Tech Adept

mugen vertex 15
#62

I am still waiting on the S3's, hopefully soon. Cybertools, yes I can modify that motor. When I say resize the sleeve that means I can have the sleeve squeezed to restore the compression.
#63
Tech Apprentice

I think that this Question was asked before but I didn't think there was an answer. Can you please answer if widening the carb opening will improve the engines performance in some way

#64

Yes, the carberetor has been opened up to improve the amount of fuel/air going into the engine, it mainly helps the engine achieve higher top end speed.
#65
Tech Apprentice

10X

#66

Originally posted by Grinder
I am still waiting on the S3's, hopefully soon. Cybertools, yes I can modify that motor. When I say resize the sleeve that means I can have the sleeve squeezed to restore the compression.
I am still waiting on the S3's, hopefully soon. Cybertools, yes I can modify that motor. When I say resize the sleeve that means I can have the sleeve squeezed to restore the compression.
jeremy

#67

All I can say is ballistic.And I don't mean just in the straight.This thing hauls all over the track and screams @ 230 degrees.I am more then pleased.My rb x12 was fast but this thing is hands down faster everywhere.Thanks Grinder! Now to see how long before I blow it up.
Whats the life expectancy for a motor that been modified compared to a stock if its taken good care of?

#68

If taken care off you should get about the same life expectancy.
#69

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Last edited by Grinder; 02-05-2008 at 04:48 AM.
#71

Yes, it will fit.
#73
Tech Regular

hi Grinder . Im the one who sent u the engine with a bad crankshaft. And I got ur email. Until now I still can't decide coz theres this guy selling me his mt12 crank for $25 + shipping and waiting for its pic. If the crank is still ok I'll let u know. thnx
#74
Tech Regular

GRINDER HOW MUCH FOR A MOD MRS1.
#75

I finally had a chance to break in my Murnan modified RB X12 last weekend.
WOW, that thing is haulin' some serious a$$.
Temperature was stable at 235-240 and I was able to run for 6 minutes easily.
Great engine, I love it.
Thank Uriah.
WOW, that thing is haulin' some serious a$$.
Temperature was stable at 235-240 and I was able to run for 6 minutes easily.
Great engine, I love it.
Thank Uriah.