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Old 04-14-2012, 10:21 PM   #3121
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Default mtx 5

hi we were there as well brock / bailey ran about 500 laps between them at titles including practise Ase well as hundreds at club events in QLD since they got mtx5 both have had different things brake but car is really good with standard set up or close too it i have ran mugens since prime 12 and this is worst one for quality control and i have calmed down since i was going to put it under the mower and get a cap /// i hate red anyway ttill have not looked at diff to find what went wrong
tom you would be lucky to have run 100 laps with your car
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was prob wrong sit to have a rant at tom sorry //greg

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Old 04-15-2012, 04:08 AM   #3122
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Greg, thanks for the commentary.

Grinder (and others), it seems the real fast (and economical) engines are 11.5 cranks (cap, rb m3, orcan, old RB and max, and others) yet more and more are coming out 11.9. Why do you think this is? What are the arguments/reasons?
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Old 04-16-2012, 02:47 AM   #3123
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Greg, thanks for the commentary.

Grinder (and others), it seems the real fast (and economical) engines are 11.5 cranks (cap, rb m3, orcan, old RB and max, and others) yet more and more are coming out 11.9. Why do you think this is? What are the arguments/reasons?
I also want to know the reason(s) why novarossi is switching from 11.5 to 11.9 crankshaft.
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Old 04-16-2012, 05:00 AM   #3124
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Uriah,

I have a question regarding my Murnan RBM3 12 2009 engine. Wich i have saved all this years. The exhaust 2604
is dented so for this weekend i have several choices in exhaust to replace it.
I am looking for torque. Wich exhaust is the best choice;

capricorn 2662 with RB manifold (came with the 2604)
nova 2601 with medium NR manifold
CRF 2647 with CRF manifold

I have the RB 2659 now but its lacking grunt.

Or a combination, maybe?

Regards

Last edited by djiewie; 04-16-2012 at 06:58 AM.
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Old 04-16-2012, 08:07 AM   #3125
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Uriah,

I have a question regarding my Murnan RBM3 12 2009 engine. Wich i have saved all this years. The exhaust 2604
is dented so for this weekend i have several choices in exhaust to replace it.
I am looking for torque. Wich exhaust is the best choice;

capricorn 2662 with RB manifold (came with the 2604)
nova 2601 with medium NR manifold
CRF 2647 with CRF manifold

I have the RB 2659 now but its lacking grunt.

Or a combination, maybe?

Regards
I would go for the Capricorn pipe out of what you have. The best pipe for the RBM3 is the RB2668. I have not tried the CRF.
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Old 04-16-2012, 08:21 AM   #3126
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Greg, thanks for the commentary.

Grinder (and others), it seems the real fast (and economical) engines are 11.5 cranks (cap, rb m3, orcan, old RB and max, and others) yet more and more are coming out 11.9. Why do you think this is? What are the arguments/reasons?
The 11.5, and 11.9 cranks are both fast. I think Novarossi went with a larger crank so they could try to make more power. It seems like Novarossi felt like they hit a wall with the 11.5mm crank design. The larger diameter gives them more options as far as bore size to play with. They can flow more fuel through the larger bore. To make the bore that big on the 11.5mm crank would make the crank too weak.

The 11.5mm crank is probably used by most tuners due to the ability to better control fuel consumption, and still make a very powerful engine. Although there are exceptions, but generally the 11.5 cranks get better fuel mileage, at the expense of some torque compared to the 11.9 crank.

Why did Novarossi choose 11.9 vs 12mm for their design? Why not 12.1, or 11.8? Who knows, probably to make their bearings the only one to work. Maybe they like the powerband of the 11.9 vs 11.8. Only Novarossi knows that.

I can assure you that the new Keep On main bearings are funky. I'm sure there is a patent on them, and no other bearing will work. Hence, your going to buy the bearing from Novarossi. Not a discount bearing company.

Just my opinion.
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Old 04-20-2012, 11:03 PM   #3127
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Mr M.

I see you have a Keep-on that is modded. How does it compare to the M21?
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Old 04-20-2012, 11:03 PM   #3128
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Mr M.

I see you have a Keep-on that is modded. How does it compare to the M21?
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Old 04-21-2012, 05:42 AM   #3129
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Mr M.

I see you have a Keep-on that is modded. How does it compare to the M21?
The MM Keep On .21 is a great engine. Comparing to the M21, the MM Keep on .21 has similar bottom end, and top end to the M21. The MM Keep On has a little smoother mid-range hit than the M21. Both are very fast, reliable engines.
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Old 04-21-2012, 07:09 AM   #3130
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The 11.5, and 11.9 cranks are both fast. I think Novarossi went with a larger crank so they could try to make more power. It seems like Novarossi felt like they hit a wall with the 11.5mm crank design. The larger diameter gives them more options as far as bore size to play with. They can flow more fuel through the larger bore. To make the bore that big on the 11.5mm crank would make the crank too weak.
A big bore is also possible with the 11.5mm crank but you do need more expensive materials and an advanced (time spending) hardening proces to get it right. Larger diameters will give more strength by itself preventing extra costs in production. Also with larger messurements you can keep the same tolerances or even lower them for a faster production.

Looking at MAX and GiMar their toplevel engines do come with both crankshafts so it seems possible with the "old" smaller diameter.
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Old 04-21-2012, 11:06 PM   #3131
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The MM Keep On .21 is a great engine. Comparing to the M21, the MM Keep on .21 has similar bottom end, and top end to the M21. The MM Keep On has a little smoother mid-range hit than the M21. Both are very fast, reliable engines.
Pipe and header with the Keep-On?

2015 with short/medium conical?
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Old 04-22-2012, 09:11 AM   #3132
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Pipe and header with the Keep-On?

2015 with short/medium conical?
2015 with medium conical header.
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Old 04-22-2012, 11:30 PM   #3133
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2015 with medium conical header.
Thanks Sir,

Will place my order within the next week or 2
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Old 04-23-2012, 06:57 PM   #3134
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We are offering a November special. Free shipping on any Murnan Modified Engine. Domestic, and International. Just choose the free shipping item in our catalog.
hi uriah, do you plan on running this promotion again anytime soon
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Old 04-24-2012, 09:30 AM   #3135
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does anyone here help me with this..has anyone here tried the .12 picco EDO and the reds M3T?they're both picco based..just wanna know wat difference Edoardo and Mario has done to these engines.thanks
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