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Old 01-15-2007, 09:19 AM   #841
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Great to see that you are enjoying the engine's performance impalabob!

Surikarn just won the Serpent Nitro Tour 2007 race in Bangkok this weekend, check out http://teamorion.com/News/ca40/newsid/155

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Old 01-15-2007, 09:46 AM   #842
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What car was surikarn using?
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Old 01-15-2007, 09:48 AM   #843
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Quote:
Originally Posted by rmdhawaii
Missed that in your title previously, it's a Murnan Modified CRF.
Interesting. Would love to see some photos of the internals. I had heard he was attempting to modify them. Guess he pulled it off as usual.
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Old 01-15-2007, 10:29 AM   #844
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Congratulation Surikarn !
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Old 01-15-2007, 02:55 PM   #845
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Quote:
Originally Posted by Artificial-I
What car was surikarn using?
Serpent 720...

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Old 01-15-2007, 04:19 PM   #846
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Quote:
Originally Posted by rc_alan
Serpent 720...

RC_Alan
The photo of him , he was holding a car with hot bodies stickers on it. Makes sense as its the serpent nitro tour...
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Old 01-15-2007, 04:37 PM   #847
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im curious from those who actually use the motor is it really a hot motor i saw josh use it but havent had the pleasure of first hand experience i have no clue
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Old 01-15-2007, 05:38 PM   #848
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Quote:
Originally Posted by SOLOARTIST 702
im curious from those who actually use the motor is it really a hot motor i saw josh use it but havent had the pleasure of first hand experience i have no clue
No ones motor will be like josh, if nothing else, he has so much experince with clutch, plugs, head clearance, etc. If you take a motor and give it to him he will get more out of it. I have seen a couple of guys with the motor at our state races and it is not bad. Bobby has the most luck with them and his is pretty fast. All of the newer motor are good. They have their differences and ways of being tuned.
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Old 01-15-2007, 07:30 PM   #849
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Quote:
Originally Posted by dj apolaro
No ones motor will be like josh, if nothing else, he has so much experince with clutch, plugs, head clearance, etc. If you take a motor and give it to him he will get more out of it. I have seen a couple of guys with the motor at our state races and it is not bad. Bobby has the most luck with them and his is pretty fast. All of the newer motor are good. They have their differences and ways of being tuned.
thanks just checking
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Old 01-16-2007, 09:19 PM   #850
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hey guys interested in buy a wasp but want to know a bit of info

first off is this a fast engine compared to a novarossi or a sirio

secondly does it keep its power through out its life? (in other words is it fast to begin with then dies after 10 litres)

how easy is it to get parts for these motors as in rebuild kits, bearings?

wats the life span of the compression how many litres till its dead

if any1 can answer the questions honeslty be much appreciated thanks
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Old 01-17-2007, 12:23 AM   #851
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The engine is a fast as anything out there. Whether you can drive your car any faster with it in depends on a number of factors. Driving style, Your ability to tune the engine, clutch, select the right exhaust etc.... etc....

The engine is cheap enough to throw it away and buy a new one when its dead.

The engine has very little pinch compared to other engines but that doesnt matter

My last one lasted 4 galls only but it was like new when I put it on the track. The pressure pipe came off the exhaust so it ran lean and it blew a hole in the crankcase. My fault

I am waiting for the Murnan Modified version to be availalbe
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Old 01-17-2007, 08:45 AM   #852
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I work for Team Orion and I will try to anwer your questions.

Performance wise, we believe that our CRF engine concept is superior to other engines concepts and we are working very hard to prove that.

The piston/liner combo is not supposed to wear out. The way the engine is made the piston does not directly touch the liner, it slides on an oil film at the liner's surface. Obviously if you run the engine too lean for extended periods of time it will wear out, but if it's used properly it should require very little maintenance. So basically it should not loose power, even after many many liters of fuel. The engine does not require an extended break-in, just a couple of fuel tanks to make sure everything is running good, it will be very fast out of the box.

The only part that has to be replaced on a regular basis is the rear ball bearing it has to be replaced every 10 hours. Failure to replace the rear bearing can cause the crankshaft to vibrate and cause engine failure.

Again in this engine there is almost no pinch, the compression exists because it is airtight, not because the piston binds on the liner. I know of CRF engines that have run well over 20 liters and are still running as strong as new.

Feel free to ask if you have anymore questions.
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Old 01-17-2007, 10:04 AM   #853
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Quote:
Originally Posted by nano
The only part that has to be replaced on a regular basis is the rear ball bearing it has to be replaced every 10 hours.
I totally forgot about this..

What is the cause of this problem? Are there exceptions to this rule? (i.e. run on small tracks versus large tracks) Is this something Team Orion is working on addressing? Can this problem be resolved by putting in some other type of bearing (i.e. ceramic?)

Thanks!
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Old 01-17-2007, 10:31 AM   #854
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Quote:
Originally Posted by rmdhawaii
I totally forgot about this..

What is the cause of this problem? Are there exceptions to this rule? (i.e. run on small tracks versus large tracks) Is this something Team Orion is working on addressing? Can this problem be resolved by putting in some other type of bearing (i.e. ceramic?)

Thanks!
10 hrs is 2 gals of fuel. Thats pretty good for any bearing.
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Old 01-18-2007, 02:41 AM   #855
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We have determined that the rear bearing will perform at 100% for a minimum of 10 hours. After 10 hours, the bearing's performance could deteriorate and cause loss of performance and/or engine failure. I am not saying it will happen, I am saying it can happen.
10 hours of running is about 9 liters of fuel (2 gallons), 120 5 minute runs or 10 races. It's not a short period of time...

This was established by the CRF engine designer himself, who always expects 100% performance.
There is probably a lot of people out there running engines which are not performing at 100% but do not notice it, and when the crank pin breaks off, the conrod breaks or the engine seizes, they buy a new engine thinking that their engine has lived it's life.

This happens with all engines, engines need maintenance to maintain their performance. Any engine can last for a long time if it's maintained properly, unfortunately only few know how to do that.
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