OSjato
05-12-2007, 08:03 AM
Jammin CRT RTR Review
Hits
THINGS I LIKED
Adjustable Camber
Soft tiers that grip well
Shaft start System
Missies
Plastic "Z" braces
Small receiver box
No transponder mount
Specifications
Wheelbase: 14.50 inches
(368 mm) Weight: 9.24 Lbs.
(4191 g) Chassis Length: 21.00 inches
(533 mm) Chassis Width: 14.80 inches
(376 mm) Chassis Height: 7.75 inches
(197 mm) Body Length: 19.00 inches
(483 mm) Body Width: 7.00 inches
(178 mm) Body Height: 5.50 inches
(140 mm)
Applications
Applications: - All Terrain
- Dirt Track
- Off-Road Car
- Racing
- Recreation Street Price: $539.99 Engine Included Radio Included
FAST FACTS Fast Facts
Braking System: Two disk Front and rear
Motor Size: .28
Class: Truggy
Channels: 2
First Impressions
Body
Radio
Manual
My CRT RTR arrived with a pre-stickered body that's ready to go. There are no variations of body paint for the CRT RTR. Just different channels. The body color has a Yellow sheen to it, which really causes the body color to pop. Three holes, two at the front and one at the rear, provide the means for the body to be secured to the posts on the chassis. Which is essential to have the body not pop off during a heat.
Jammin and Ofna doesn't leave you out in without means to understand the inner workings of their race monster. So you'll want to glance over the included documentation before you first run your CRT. The Guide gives you the basic information you'll need for running and tuning the CRT.
The CRT has a similar radio to what was first seen in the other Ofna buggies and trucks. It's a basic AM radio with analog knobs. The CRT's radio uses crystals though, instead of synthesized operation. The main reason behind this is to keep the cost of the CRT at a very competitive price. (The radio does include a dual-rate adjustment) Which is handy if you need to dial out some of the truck's steering. The radio has a nice cushy feel to the steering knob. It takes a little time to get used to the radio compare to other radios out on the market. However, it works as I could use it comfortably.
Vecheil size
Left side
Right side
Boutton
So just how big is a 1/8th scale? With a length of 19.00 inches, it's just a little larger than a common 1/10th stadium truck. I was amazed when I first seen the Truggy… It was HUGE compared to all the other 1/10th scale buggies and Monster tucks.
The CRT is a four drive truck, just like a Monster truck of buggy (hence the name Truggy). A meal semi-tub chassis forms the foundation of the truck, and supports the front and rear suspension assemblies. The top of the front shock tower is kicked back a little.. This provides some extra caster angle to the front of the truck, and helps the truck correct itself upon landing should the front end come down a little too hard. To the rear of the shock tower you'll find the rear differential.
The bottom of the CRT is nice and smooth. Countersunk hardware is used to avoid having any screw heads that could catch the ground as the it speeds across the ground. The left-hand side sports the header and the Right side of the truck is the power switch for the radio without the need to remove the body. Behind it, you'll find the cover for the battery/radio compartment.
Front Suspension
Rear Suspension
Shocks
The front suspension what you'll find on a REVO. There are some differences. Like being able to adjust the upper a arm for more/less camber. Most notable of these is the fact that the front shocks are vertical. However, given that the truck is a racer and is meant for quick adjustments the are likely to have little effect overall.
The plastic lower suspension arms have some thickness to them. The axle and steering assembly for the front is made possible by a c-hub assembly. The steering links are fixed, and made of plastic/meal. They are surprisingly thin at first glance, but their design allows them to flex if impacted which offers the servo protection.
The CRT uses medal shocks to handle the duties. A stainless steel shock shaft offers plenty of strength for the track. At the top end of the shock, a medal shock cap is used to hold the upper end of the spring is in place and keep in the shock oil. The shock's preload is adjustable, and can be very handy for a Racers use.
Wheels and tires
The tires for the CRT are pre-glued onto White rims that are very easy to see. The front tires are lined with little "*****les." They are meant to provide good traction when cornering. The rear tires are the very same as the Front tires
The tires use foam inserts between them and the wheel. This helps the tire maintain its shape. To allow air to flow in and out of the tire freely, Jammin/Ofna has pre-"drilled" holes into the wheel. Both the front and rear wheels are held in place by 17MM hex nuts. The front and rear wheels rotate on glass smooth bearings.
Engine
The CRT RTR is powered by the Ofna Force engine, which provides you with .28 cubic inches of ground pounding power. This motor was used in all the other Ofna RTR's, and provided tons of power for the large monster truck
Prep Work
Time for action
I started out by braking in the force .28 with the Heat cycle mouthed. (giving the piston and sleeve a proper fit to one another) Since I wasn't at the track I broke it in my front yard. The engine was set to a lean condition out of the box. So I took out the manual and blew the dust off of the cover and took a look at the factory settings. So I rest the needles to 3½ turns out (HSN) and left the LSN alone. The break-in procedure went smoothly, and each one of the engines components warming and cooling cycles flew by pretty quickly. The Roto-start from Ofna made the break-in go by smoothly. With quick and easy starts. It had no problem with turning over a New engine. The starter shaft accessed the engine's backplate easily via the rear of the truggy. In fact, I found it much easier to access the backplate than when starting a Buggy. It was a little easier to clear the suspension. When the time was done flying by I realized that I was done with the break-in! So with that behind me I set about to tuning the big block. All the tuning I did though the whole process was to turn the needle ¾ of the way out (Richer). That was a very easy task to do! After that I had to ponder on were to run this terrier. Then I thought the track! So I packed up and headed off that way. When I reached the track I realized how easy the truck was to pack up and move from home to the track. Now that is a true racers dream for a truck to transport with out hassle! When the truck reached the clay the truck new what time it was and took off like a beauty. There is no truck I have driven that drives as nice as this did. Now there was a bit of body roll. That's nothing that a tweak to the preloads cant fix. I was soon getting the feel of the truck. I was amazed of the stability on the trucks platform. It was a bit Tight (overseer) in the corners due to the lack of off power steering, The truck would interpret the jumps so well it just flew in the air without a tap to the throttle. The only problem I had that day with this truck was I had cart wheeled the truck off a triple jump and bent the Left rear CVD. I took it out and bent it back into place with a Vice. Then I thought the really easy it is to work on the car! This is a sure keeper! As my time with the CRT drew to the end, its easy to see that the truggys out of the box handling is superb and, with further tweaking to tailor the truck to the owners tastes, it only improves even more. I initially had some doubts as to whether the truggy would be capable of really running with the buggy crowd. I would hate to see the faces of the buggy crowd when I cross the finish line first!
Conclusion
The CRT is definitely a race truck that is going to be VERY competitive On the track, its low center of gravity, gives it the edge when jumping thought the track. When I bent my rear CVD I found that it was very easy to work on!
Aside from the CVD issue; I had no problem with the truggy. The CRT is equipped with some big tires, which really Grips the clay well.
In short, don't discount the ability of the CRT to hold it's own at the track or in the bashers own back yard. I expect it to become a popular platform for novice truggy racers. This is exactly what most novice truggy drivers will stand to benefit from the most!
Hits
THINGS I LIKED
Adjustable Camber
Soft tiers that grip well
Shaft start System
Missies
Plastic "Z" braces
Small receiver box
No transponder mount
Specifications
Wheelbase: 14.50 inches
(368 mm) Weight: 9.24 Lbs.
(4191 g) Chassis Length: 21.00 inches
(533 mm) Chassis Width: 14.80 inches
(376 mm) Chassis Height: 7.75 inches
(197 mm) Body Length: 19.00 inches
(483 mm) Body Width: 7.00 inches
(178 mm) Body Height: 5.50 inches
(140 mm)
Applications
Applications: - All Terrain
- Dirt Track
- Off-Road Car
- Racing
- Recreation Street Price: $539.99 Engine Included Radio Included
FAST FACTS Fast Facts
Braking System: Two disk Front and rear
Motor Size: .28
Class: Truggy
Channels: 2
First Impressions
Body
Radio
Manual
My CRT RTR arrived with a pre-stickered body that's ready to go. There are no variations of body paint for the CRT RTR. Just different channels. The body color has a Yellow sheen to it, which really causes the body color to pop. Three holes, two at the front and one at the rear, provide the means for the body to be secured to the posts on the chassis. Which is essential to have the body not pop off during a heat.
Jammin and Ofna doesn't leave you out in without means to understand the inner workings of their race monster. So you'll want to glance over the included documentation before you first run your CRT. The Guide gives you the basic information you'll need for running and tuning the CRT.
The CRT has a similar radio to what was first seen in the other Ofna buggies and trucks. It's a basic AM radio with analog knobs. The CRT's radio uses crystals though, instead of synthesized operation. The main reason behind this is to keep the cost of the CRT at a very competitive price. (The radio does include a dual-rate adjustment) Which is handy if you need to dial out some of the truck's steering. The radio has a nice cushy feel to the steering knob. It takes a little time to get used to the radio compare to other radios out on the market. However, it works as I could use it comfortably.
Vecheil size
Left side
Right side
Boutton
So just how big is a 1/8th scale? With a length of 19.00 inches, it's just a little larger than a common 1/10th stadium truck. I was amazed when I first seen the Truggy… It was HUGE compared to all the other 1/10th scale buggies and Monster tucks.
The CRT is a four drive truck, just like a Monster truck of buggy (hence the name Truggy). A meal semi-tub chassis forms the foundation of the truck, and supports the front and rear suspension assemblies. The top of the front shock tower is kicked back a little.. This provides some extra caster angle to the front of the truck, and helps the truck correct itself upon landing should the front end come down a little too hard. To the rear of the shock tower you'll find the rear differential.
The bottom of the CRT is nice and smooth. Countersunk hardware is used to avoid having any screw heads that could catch the ground as the it speeds across the ground. The left-hand side sports the header and the Right side of the truck is the power switch for the radio without the need to remove the body. Behind it, you'll find the cover for the battery/radio compartment.
Front Suspension
Rear Suspension
Shocks
The front suspension what you'll find on a REVO. There are some differences. Like being able to adjust the upper a arm for more/less camber. Most notable of these is the fact that the front shocks are vertical. However, given that the truck is a racer and is meant for quick adjustments the are likely to have little effect overall.
The plastic lower suspension arms have some thickness to them. The axle and steering assembly for the front is made possible by a c-hub assembly. The steering links are fixed, and made of plastic/meal. They are surprisingly thin at first glance, but their design allows them to flex if impacted which offers the servo protection.
The CRT uses medal shocks to handle the duties. A stainless steel shock shaft offers plenty of strength for the track. At the top end of the shock, a medal shock cap is used to hold the upper end of the spring is in place and keep in the shock oil. The shock's preload is adjustable, and can be very handy for a Racers use.
Wheels and tires
The tires for the CRT are pre-glued onto White rims that are very easy to see. The front tires are lined with little "*****les." They are meant to provide good traction when cornering. The rear tires are the very same as the Front tires
The tires use foam inserts between them and the wheel. This helps the tire maintain its shape. To allow air to flow in and out of the tire freely, Jammin/Ofna has pre-"drilled" holes into the wheel. Both the front and rear wheels are held in place by 17MM hex nuts. The front and rear wheels rotate on glass smooth bearings.
Engine
The CRT RTR is powered by the Ofna Force engine, which provides you with .28 cubic inches of ground pounding power. This motor was used in all the other Ofna RTR's, and provided tons of power for the large monster truck
Prep Work
Time for action
I started out by braking in the force .28 with the Heat cycle mouthed. (giving the piston and sleeve a proper fit to one another) Since I wasn't at the track I broke it in my front yard. The engine was set to a lean condition out of the box. So I took out the manual and blew the dust off of the cover and took a look at the factory settings. So I rest the needles to 3½ turns out (HSN) and left the LSN alone. The break-in procedure went smoothly, and each one of the engines components warming and cooling cycles flew by pretty quickly. The Roto-start from Ofna made the break-in go by smoothly. With quick and easy starts. It had no problem with turning over a New engine. The starter shaft accessed the engine's backplate easily via the rear of the truggy. In fact, I found it much easier to access the backplate than when starting a Buggy. It was a little easier to clear the suspension. When the time was done flying by I realized that I was done with the break-in! So with that behind me I set about to tuning the big block. All the tuning I did though the whole process was to turn the needle ¾ of the way out (Richer). That was a very easy task to do! After that I had to ponder on were to run this terrier. Then I thought the track! So I packed up and headed off that way. When I reached the track I realized how easy the truck was to pack up and move from home to the track. Now that is a true racers dream for a truck to transport with out hassle! When the truck reached the clay the truck new what time it was and took off like a beauty. There is no truck I have driven that drives as nice as this did. Now there was a bit of body roll. That's nothing that a tweak to the preloads cant fix. I was soon getting the feel of the truck. I was amazed of the stability on the trucks platform. It was a bit Tight (overseer) in the corners due to the lack of off power steering, The truck would interpret the jumps so well it just flew in the air without a tap to the throttle. The only problem I had that day with this truck was I had cart wheeled the truck off a triple jump and bent the Left rear CVD. I took it out and bent it back into place with a Vice. Then I thought the really easy it is to work on the car! This is a sure keeper! As my time with the CRT drew to the end, its easy to see that the truggys out of the box handling is superb and, with further tweaking to tailor the truck to the owners tastes, it only improves even more. I initially had some doubts as to whether the truggy would be capable of really running with the buggy crowd. I would hate to see the faces of the buggy crowd when I cross the finish line first!
Conclusion
The CRT is definitely a race truck that is going to be VERY competitive On the track, its low center of gravity, gives it the edge when jumping thought the track. When I bent my rear CVD I found that it was very easy to work on!
Aside from the CVD issue; I had no problem with the truggy. The CRT is equipped with some big tires, which really Grips the clay well.
In short, don't discount the ability of the CRT to hold it's own at the track or in the bashers own back yard. I expect it to become a popular platform for novice truggy racers. This is exactly what most novice truggy drivers will stand to benefit from the most!