XTM 24.7 motor

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Bob Tenwick
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XTM 24.7 motor

Post by Bob Tenwick » Fri Feb 27, 2004 7:34 am

Just put one in the Savage last night.

2.75 horsepower

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Post by sandman4free1 » Mon Mar 01, 2004 2:31 pm

Bob, it's a great motor had 14 gallons on mine before it wouldn't run any more.......replace the head when you get a chance for better cooling. the bigger head on the pro is better than the original but still needs improvement. nova makes a great one all 7075 aluminum. if you are too cheap I might have one to sell real cheap. basicly a six pack and the cost of shipping.
Bryon

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Post by Winston Cup » Mon Mar 01, 2004 2:50 pm

What's the rpm of that motor?
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Post by Greg Hall » Mon Mar 01, 2004 8:07 pm

sandman4free1 wrote:if you are too cheap
:shock: :lol: :lol: :lol:
Thats always been my concern with Bob too!
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Post by sandman4free1 » Tue Mar 02, 2004 7:19 am

claimed is 29k but I doubt it ever reaches that. dont belive any of the claimed numbers either. there is no set standard for testing. I stepped up to the orion wasp .26 more torque and rpm. I will try a RB .28 when they are released to the public, I expect @ 39k rpm and @ 3 hp


xtm 24.7 = 29k rpm 2.4hp
wasp .26 = 35-37k rpm 2.7 hp
RB .28 = 39-41k rpm 3hp
the only thing I know is that the wasp was dynod in rc action a few monthes back.

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Post by Bob Tenwick » Tue Mar 02, 2004 7:35 am

sandman4free1 wrote:Bob, it's a great motor had 14 gallons on mine before it wouldn't run any more.......replace the head when you get a chance for better cooling. the bigger head on the pro is better than the original but still needs improvement. nova makes a great one all 7075 aluminum. if you are too cheap I might have one to sell real cheap. basicly a six pack and the cost of shipping.
Bryon
email me your address, I'll UPS you a sixer. :lol: Let me know what you want and I'll pick it up from you.

They're claiming the 24.7 pro has 2.75 horse, by the way. Still breaking mine in, and I found out my rear pumpkin is wasted. :?

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Post by Winston Cup » Tue Mar 02, 2004 12:34 pm

These are the specs for the Hyper .21 8 port I run in my T-Maxx

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CLAIMED HP 2.5
RPM 38,000
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Post by sandman4free1 » Wed Mar 03, 2004 10:34 am

the xtm moter has more torque but not quite the same top end as the hyper. I wouldn't hesitate to run either.

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Post by Greg Hall » Wed Mar 03, 2004 8:15 pm

sandman4free1 wrote:the xtm moter has more torque but not quite the same top end as the hyper. I wouldn't hesitate to run either.
There you go Bob! All the reason you need to go buy another truck! That way you can run one of each!
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Visiting and helping to protect the dunes since 1962
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'06 KTM 525EXC
'98 KTM 620SC
'06 KDX 200..my son's bike
KX 100 My 11 year old son's
KFX 400 also my son's bike
LT 500..all mine

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Post by sandman4free1 » Thu Mar 04, 2004 6:45 am

save the money and get the RB .28 instead. then no one will be able to touch you. I imagine in the 300 range. well worth the quality and the size. it's on my short list of things I need.

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Post by Greg Hall » Thu Apr 22, 2004 9:24 pm

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Greg Hall
KG6IAT
http://www.hallsengine.com
Visiting and helping to protect the dunes since 1962
Image

http://www.RideOcotilloWells.com

'06 KTM 525EXC
'98 KTM 620SC
'06 KDX 200..my son's bike
KX 100 My 11 year old son's
KFX 400 also my son's bike
LT 500..all mine

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Post by vdubduner » Thu Apr 22, 2004 10:30 pm

nice blower.
Darrin
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Post by Winston Cup » Thu Apr 22, 2004 10:48 pm

Greg ya big tease, don't just post that puppy and leave us hangin'. Details details.

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Post by Greg Hall » Thu Apr 22, 2004 11:05 pm

Winston Cup wrote:Greg ya big tease, don't just post that puppy and leave us hangin'. Details details.

Guy
http://www.rbinnovations.com/newsite/ma ... harger.htm

Finally it’s here and this sure will put the power into your RC engine. The RB Nitro Super-Charger is the ultimate engine upgrade component available in the RC industry. This patented, compact design consists of aluminum and thermoplastic construction. This lightweight construction minimizes engine power required to drive the Super-Charger turbo impeller system. This precision turbo impeller is enclosed in a micro-polished aluminum housing which has been machined from solid billet aircraft aluminum. This provides maximum strength and durability while providing superior air flow from the turbo impeller into the engine’s carburetor.
The heart of the Super-Charger’s drive system is a custom composite drive belt that withstands the toughest environments. The Super-Charger’s drive system incorporates a lightweight flywheel, idler pulley system, and a 30% overdrive Super-Charger pulley. The Super-Charger also includes an



optional auxiliary pressure output port for boosting fuel pressure to levels not reached by the standard exhaust pump system. This allows maximum nitro and air mixture which boosts engine horsepower.

This product was designed and manufactured using one the most state of the art CAD/CAM systems available.

All rotating parts within the supercharger are extremely lightweight thus drawing very little power from the engine. The supercharger also includes an optional auxiliary pressure output port for boosting fuel pressure to levels not reached by the standard exhaust pump system. This allows maximum nitro and air mixture which boosts engine horsepower.

The RB Nitro Super-Charger comes fully assembled and includes the following:
30% overdrive Super-Charger drive pulley
High performance drive belt
High-temperature connecting tubes
High-strength engine mounting bracket
All hardware required for the assembly
Complete Super-Charger assembly

Intake Filter Options: *Either filter option can be used on any Super-Charger application.
• On road – A low-profile, high flow air filter assembly is mounted on the intake of the Super-Charger. This air filter assembly is easily removed for easy cleaning. A simple spray of air, or filter cleaner, can be used on the filter assembly and then reinstalled back into position.
• Off road – The high-performance intake manifold allows for the mounting of a stock, or aftermarket, 1/8th scale size filter anywhere on the chassis. This comes complete with 6-8” flexible tubing and an anti-kink spring.

Charger Specifications / Performance Enhancements:
• The custom flywheel and a complete drive hardware kit are included
• Weighs less than ½ oz
• Utilizes a lightweight, turbo impeller to produce maximum air flow which optimizes engine scavenging characteristics
• Maximizes scavenging process of the two stroke engine
• Typical power gains range from 15.6% to 27.3% depending on engine and pipe combustion, as well as the Super-Charger setup
• High output charger boosts air intake by 50-200%
• Engine acceleration is dramatically improved by the Super-Charger and the auxiliary pressure output
• The engine runs more consistent from idle to full throttle
• Optional auxiliary pressure port can be used to boost the fuel pressure aiding in the fuel delivery to the engine
• Auxiliary port compensates for low back-pressure in the pipe due to low engine rpm’s
• When the throttle is advanced, the fuel is immediately delivered to the engine
• Enables the engine to run more consistently from full to empty tank conditions
• The durable drive belt and drive system are very lightweight and draw minimal power from the engine
• The high-performance intake manifold allows the use of larger filters and enables the filter to be mounted in any location on the chassis
• System is easy to install and maintain
• Upgradeable driver pulleys are available for further enhancing performance of the engine

Image
Greg Hall
KG6IAT
http://www.hallsengine.com
Visiting and helping to protect the dunes since 1962
Image

http://www.RideOcotilloWells.com

'06 KTM 525EXC
'98 KTM 620SC
'06 KDX 200..my son's bike
KX 100 My 11 year old son's
KFX 400 also my son's bike
LT 500..all mine

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