nitrohead5300

Cen says that it's .46 motor produces 5 hp, I never believed that but I figured that it at least produced 2-3 hp well according to X-treme RC Car mag they dynoed the motor and only got 1.5 hp. Yikes no wonder why it looked so slow in the video.

Haldir

lol

snowbl!nd

No way does the .46 only produce 1.5Hp. Watch the video, do you really think that 1.5Hp could move such a heavy truch around like it does. During most of the video the front wheels are pawing at the air, the engine is producing so much torque. I seriously doubt 1.5Hp could get that truck over 15MPH even if it was geared properly. It may not be producing 5Hp, but it is certainly pumping out a lot more than 1.5!

http://www.rcuniverse.com/forum/m_3037933/tm.htm

Supertronic Systems-Malta

Cen 46 engine has the power to pull a mini.The X-treme RC Car mag people were in
the moon when they tested the CEN 46 Engine and said it produced only 1.5hp

Nitrohead5300.You need to see the Genesis video again if you said its slow or maybe
your internet connection is slow.

Tudogs

My Feedback: (1)

All manufacturers list their hp & tq. figures @ the flywheel. Sorta makes things universal.

So the 1.5hp figure you have is @ the tire.

Start with 5bhp, add a gear box & 2 diffs, 7" tires & one heavy truck=1.5hp.

gerwen

Each dyno test is subjective. You really can't compare results from one dyno to the next. You can only compare results done from a single dyno.

From what I've seen X-treme rc car's dyno reads lower than most. They tested the Savage SS 4.6 at around 1.5 hp as well (iirc) and hpi claims 2.9hp.

Of course most manufacturers will overstate their hp numbers. There's no way to prove them wrong, and bigger is better.

cenracer1

from personal experience I have seen the Genesis in action... Not even fully broken in the engine smokes the tires on blacktop, pulls wheelies at will and so far launced the truck to mid 30's in 2nd gear.. not leaned out enough for 3rd... I don't know what the exact #s are nor do I really care, but it is irresposible to claim only 1.5hp... I have an OS 18 that puts out that and a .21 that is in the 2's... See the truck for yourself... This beast is heavy... around 15 lbs or more and it is fast...

nitrohead5300

My internet connection is not slow the Genesis is. Gerwen I agree with you , X-treme RC dyno always reads lower than everyone elses. And my point is I believe that all the mfg inflate their horsepower ratings, don't be mislead I have seen Savages with well tuned .26 & .28 smoke Genesis & Truckzilla's. The .46 is a torque monster it does not turn enough rpms on the top-end to produce any kind of speed and right now you can't really gear it up high enough to take advantage of the torque. It is not super slow , it has decent speed for its size but when compared to other trucks out there it is not the fastest. The Truckzilla and the Genesis are backyard bashers not competition racing machines in their stock condition.

Supertronic Systems-Malta

You can never compare a Savage with a Genesis truck! its like comparing a mouse
with an elephant.

nitrohead5300

...........I did'nt say they were the same just that the Genesis & Truckzilla are slower than a well tuned Savage with a big block in it. The Genesis & Truckzilla's in stock form are just backyard bashers!

Jester79

Did extreme say anything about torque? I would like to see that reading, since it means more in performance that HP anyways.

nitrohead5300

They did give a torque reading I just don't remember. Torque & RPMs = speed. The Cen .46 & the hot bodies .46 just don't turn enough rpms to get good top-end speed.

Jester79

I live near proline and got to see a genesis run the a-main at MAXX chalenge it had more than enough top end, it was accually in 2nd behind drake, too bad they both broke it was begining to be a good race.

nitrohead5300

If the track had really short straightaways, then the Genesis should hold its own but if the track has long straightaways The Genesis will run out of rpms for top-end speed, that may have been why, it was in second place. I read some where that Cen was going to race their Genesis in unlimited racing events. If this, Genesis was driven by the Cen racing team then this truck was not box stock.

nitrohead5300

..............That torque reading was .39 @ 17,000 rpms

nitrohead5300

One thing I will say about Cen company they do address the weak points with their products and I would not be surprised that they don't come out with a new race version of their .46 motor that has more rpms & torque

mxwrench

Just because an engine is big, doesn't mean it is going to have huge horespower. I realize that 1.5 hp doesn't seem like alot, especially when there are .21 on road engines making 1.9 hp. However, .39 ft lb or 75 oz in. of torque is alot! Compared to the .21 On road engine's .28 ft lb or 54 oz in. Here is a sample of a few engines I have run on my dyno to try and get my point accross. Big isn't always better, torque over time is what horsepower is. If an engine can produce high torque figures and carry them high into the rpm range then you automatically get high HP figures. HP = TQxRPM/5252, always has and always will.

I back my dyno figures 100%. My dyno calculates work produced by accelerating a known mass to a measured rpm over time. There is very simple physics at work here. I dont just strap a prop to an engine and measure the max rpm it can achieve and then try and back calculate tq. (That method, while ok for comparing modifications, does not give accurate figures, as there are to many variables involved to accurately determine power output.)

So please, don't fall prey to engine manufactures inflated imaginary 'claims' of HP. They are usually made up figures designed to keep up with the Jones's and to lure you, the customer to purchasing their product because it has BIG HP printed on the box. If CEN claims this engine makes 5 HP let them show us their testing methods.

I have to call BS on this one!

Thanks for listening,

Brian Kinney
Owner/Designer
NitroDyne Systems

RenegadeRevo

My Feedback: (1)

Since when did vehicle weight change the WHP (Wheel Horsepower)? The diffs and gear box will amplify the torque rating, also... the HP will lower, but TQ rating (depending on gearing) will boost... dynoing these engines is not accurate. As gerwin said... you have to test it on the same dyno to get good comparisions... otherwise it's useless... they haven't come out with a "standard" of rating the hobby engines for HP... They may claim 5HP on THEIR dyno... but on another one... 1.5...

ThunderbirdJunkie

My Feedback: (3)

Nobody's mentioned the difference between XRC's dyno and RCCA's dyno. that surprises the hell out of me.
by the way, good to see ya here mx
I have no doubt in my mind that the Genesis' .46 would pull close to 4 hp on RCCA's dyno. 5 horses though...I agree with everybody else's BS flag.

nitrohead5300

I doubt that it would generate 4hp and it does not make any difference because you don't have the right gearing options to really take advantage of this torque monster so you can get top -end speed. All you have is a backyard basher - wheelie machine.

bentgear

I guess what all this means is I can convert my 350 small block to alcohol and get 3,800 HP and it will last?

Ed M.

nitrohead5300

Sure it can! And you can drive it back and forth to work too.

ThunderbirdJunkie

My Feedback: (3)

as long as last=rebuild every 1/4 mile, and you live no further than 1/4 mile from work
also, to the guys that say top speed and rpm go hand in hand...
NO.
my 83 Honda Accord and my 88 Ford Thunderbird for example...
my Accord would rev to 6500 rpm all day long, my t-bird's factory redline is 4800. My t-bird will also cruise at 130 all day long, while the Accord had trouble breaking 95.
yeah, higher rpm's means a LOT doesn't it.

RC30GTR

Just for your information. HPI claim 4.8 HP on their Hot Bodies .46 conversion. Since HPI is a reputable company.. I completly believe that the CEN .46 has 5.0hp simply it looks better built to me and its a rear exhaust which mean... none heli...

ThunderbirdJunkie

My Feedback: (3)

HPI doesn't make that .46 conversion for the Savage, that's Hot Bodies.