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Murnan Modified Motors

Old 04-09-2003, 07:12 PM
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Here's pics of an MT12 carb and exhaust port.
Attached Thumbnails Murnan Modified Motors-mt12sleeve.jpg  
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Old 04-09-2003, 07:14 PM
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MT12 carb.
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Old 04-09-2003, 07:16 PM
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for how much? is that 230?........Grinder, shoot me an email......i want one of your engines!

[email protected]


Thanks
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Old 04-10-2003, 10:44 PM
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Default mt-12 rebuild

Grinder, I have an mt-12 that needs to be "warmed up". How much to rebuild, and how long?

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Old 04-11-2003, 05:11 PM
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I don't rebuild engines I just modify new or nearly new engines. You can send me the MT12 if you replace the piston, sleeve, and rod.
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Old 04-11-2003, 05:36 PM
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grinder - what would u charge me to do some work on my rs12s1tr - i need the crnak worked on - this is the standard crank not the turbo - i know that the turbo crank has a widened inlet port but i dont know exactly what or how much is widened. i could buy a turbo crank but can u do this type of job?
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Old 04-11-2003, 10:33 PM
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Do you do Novarossi RS12S3's? Thats supposed to be the best unmod non turbo engine... How much if you do? Also I have a an mr-12... i was gonna resleeve it soon, send it to that os rocket resleve thing, after i do that would you be able to mod it? How much would it cost?
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Old 04-14-2003, 11:23 PM
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Default Novamega sx12

Have one coming from grinder this week...Can't wait. Also have an rbx12 to send to have it massaged. With the Short stroke novarossi based engines and these modified,does anyone know a good pipe for a medium sized track.I run the rdlogics pipes right now and was wondering of any other suggestions.By the way its the "Legal" turbo one peice by Rdlogics.sweet pipe on my x12 thats for sure.Grinder,any suggestions?
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Old 04-15-2003, 01:57 AM
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Default Pipe for medium sized tracks

Originally posted by racenut123
does anyone know a good pipe for a medium sized track.I run the rdlogics pipes right now and was wondering of any other suggestions.By the way its the "Legal" turbo one peice by Rdlogics.sweet pipe on my x12 thats for sure.Grinder,any suggestions?
For medium sized tracks I use with some success the RB X12 pipe with the RB short manifold (1700-193). You need to cut the manifold to get a combined lenght of 102 milimeters. Drill the stinger of the exhaust up to 5.1 or 5.2mm.

Strong launch with lots of mid end, fails a little at high rpms, but you requested a pipe combo for medium sized tracks.
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Old 04-15-2003, 06:46 AM
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I race at a medium sized track, and I use an RB .12 header with the RB X15 non turbo pipe(EFRA 2502). This combination seems to work very nicely for me, and the stinger diameter is just within the legal limit.
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Old 04-15-2003, 07:07 PM
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Default Re: Novamega sx12

Originally posted by racenut123
Have one coming from grinder this week...Can't wait. Also have an rbx12 to send to have it massaged. With the Short stroke novarossi based engines and these modified,does anyone know a good pipe for a medium sized track.I run the rdlogics pipes right now and was wondering of any other suggestions.By the way its the "Legal" turbo one peice by Rdlogics.sweet pipe on my x12 thats for sure.Grinder,any suggestions?
Yes, the new RD pipes kick some butt, and about half the price of the the Nova Rossi's.
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Old 04-15-2003, 09:24 PM
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They sound so nice on these engines, too. With mine, you can't hear it until it's howling down the backstraight
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Old 04-15-2003, 09:26 PM
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Also, I suggest tightening down on that 2speed, with the Murnan... you want to use all that top end power.
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Old 04-15-2003, 10:51 PM
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i tried sending an email to order one, but he didn't reply...

Wat's up?!?!?
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Old 04-17-2003, 01:50 AM
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He'll get back to you, he just got a load of engines in...
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