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Murnan Modified Motors

Old 02-21-2006, 07:10 PM
  #676  
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Red face

Yes gary i still do and will be running his rer at kissimee,
as i dont think the os will like that mile long straight.
but i might need the fuel millage the murnan os should supply me with along with the extra power over a stock one.

stop starting trouble lol
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Old 02-22-2006, 04:30 AM
  #677  
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i think your right fuel milage will be something we will all be after i know i will have to change motors to........ maybe we should be pushing for three speeds... see you there. me start trouble
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Old 02-22-2006, 04:47 AM
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hey murnan do you rebalance crank after mods?
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Old 02-22-2006, 04:51 AM
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Yes, sedan.......I was running .3mm of shim on the .12.
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Old 02-22-2006, 08:05 AM
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Originally Posted by XingXing
hey murnan do you rebalance crank after mods?
Of course.
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Old 02-22-2006, 10:11 AM
  #681  
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hi uriah! what is the best pipe that you recommend to be used on your engines
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Old 02-22-2006, 06:28 PM
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Grinder, I send you a private message, Iam interested in buying an engine can you send me a PM, thanks
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Old 02-24-2006, 04:19 AM
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Default Crankshaft silicone

Originally Posted by areal
I already knew it was going to be difficult to get a straight answer
Nevertheless your tips and tricks showed me the way!
Thanks!!!

PS: If I eventually manage to drill the crankshaft, I'll let you know
As promissed, I'll let you know how this is going.
I finally managed to drill an old Mega ZX21 crankshaft.
I had a hard time finding the proper carbide bit (on the other side of the Atlantic getting a carbide bit is a pain in the $ss) but I eventually managed to do it. I worked out pretty good.

After drilling and cleaning the crankshaft I tried to fill the hole with high temp RTV silicone (I'm using high temp silicone from Wurth - used in 1/1 engine gaskets) but I had a hard time making it smooth. It just doesn't look like the ones from the engine manufacturers.
Maybe you guys (Grinder, TheDoctor and nitrodude) can share your tips on how to insert the silicone and making it smooth?

Thanks for your help!

PS: I'll try to post a pic later today!
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Old 02-24-2006, 05:32 AM
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Originally Posted by rbboy
hi uriah! what is the best pipe that you recommend to be used on your engines
I like the Skyline VR12, Mugen Shimo, and JP. They are all very good. The VR12 gives the most power for fuel consumed.
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Old 02-24-2006, 05:49 AM
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Originally Posted by areal
As promissed, I'll let you know how this is going.
I finally managed to drill an old Mega ZX21 crankshaft.
I had a hard time finding the proper carbide bit (on the other side of the Atlantic getting a carbide bit is a pain in the $ss) but I eventually managed to do it. I worked out pretty good.

After drilling and cleaning the crankshaft I tried to fill the hole with high temp RTV silicone (I'm using high temp silicone from Wurth - used in 1/1 engine gaskets) but I had a hard time making it smooth. It just doesn't look like the ones from the engine manufacturers.
Maybe you guys (Grinder, TheDoctor and nitrodude) can share your tips on how to insert the silicone and making it smooth?

Thanks for your help!

PS: I'll try to post a pic later today!
Try not to overfill with RTV. Make the first application and smooth it with a flat blade that is rounded to match the inside of the crank. and some oil, then leave it alone. If you keep messing with it trying to make it smooth, it will only get worse. When it is smooth dry the oil with a cotton tip. It takes a lot of trial and error. Also make sure that the silicone is not the highest point, in other words make the fuel hit the metal and then smoothly flow to the silicone. If you do not the fuel can eventually work it's way underneath the RTV and make it detach.
The Mega has insane torque when lightened, but loses even more of it's reliability. Make sure you keep good rods in it.
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Old 02-24-2006, 06:13 AM
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Thanks Grinder!
I'll try to fill it the way you explained.
As you can see from the pics, the silicone is not that good

Thanks for your help!
Attached Thumbnails Murnan Modified Motors-cambota1.jpg   Murnan Modified Motors-cambota2.jpg  
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Old 02-24-2006, 12:43 PM
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Originally Posted by areal
Thanks Grinder!
I'll try to fill it the way you explained.
As you can see from the pics, the silicone is not that good

Thanks for your help!

Yikes never learn unless you try......
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Old 02-24-2006, 01:29 PM
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here's a tip ... i used the top of a sharpie marker and cut it to fit and i use mek. instead of oil to make it smooth.. just a though
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Old 02-24-2006, 06:59 PM
  #689  
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Originally Posted by TrickPonYracing
here's a tip ... i used the top of a sharpie marker and cut it to fit and i use mek. instead of oil to make it smooth.. just a though
what is mek?
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Old 02-24-2006, 07:47 PM
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Originally Posted by JustRace
what is mek?
methyl ethyl ketone, i think.
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