engine dyno?
07-23-2009 | 11:11 AM
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From: Myrtle Beach,
SC
engine dyno?
tried to search the forums for engine dynos and couldn't come up with anything. does anyone know where i could go to look into building or buying one?
07-23-2009 | 09:04 PM
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From: Torchy the Fiery Fast RC Turtl
RE: engine dyno?
The best accepted nitro engine dyno on the market today is the X-Dyno made by Nitrodyne. Many reputable modders use it. Ed Bridges form EB mods has adopted this dyno, Adam form AB Mods too uses this dyno. As a matter of fact, a whole magazine, Xtreme RC, uses this dyno on all the engines they test.
This dyno has an SAE station to compensate for ambient conditions and automatically adds SAE corrections to the output graphs.
If anything, this dyno gives real world power outputs. It does not give the pumped-up exagerrated HPs that you see in magazines (virtually ever engine advertisers straight out LIE about what nitro engines make). 5HP from a nitro engine? Impossible! So, when you reat an engine ad in any RC mag, please absolutely disregard those numbers because they are way too high.
Look at the engine tests done in XRC mag and you will see that these numbers are much more reasonable for out RC nitro engines.
You might be disappoint at first at what the real numbers are, but once you realize that engine advertisers are lying through their teeth, you will realize that even the numbers on an X-Dyno are very impressive for an engine the size of .12ci. Considering many full sized car engines do not even get 1BHP for each CI, sing that a 1BHP .12ci engine would make 8.33BHP for 1ci is absolutely impressive.
I will warn you though, X-Dyno is not cheap. A single X-Dyno can put you back about $6000 USD (maybe more or less, I do not know what options are available for it).
This dyno has an SAE station to compensate for ambient conditions and automatically adds SAE corrections to the output graphs.
If anything, this dyno gives real world power outputs. It does not give the pumped-up exagerrated HPs that you see in magazines (virtually ever engine advertisers straight out LIE about what nitro engines make). 5HP from a nitro engine? Impossible! So, when you reat an engine ad in any RC mag, please absolutely disregard those numbers because they are way too high.
Look at the engine tests done in XRC mag and you will see that these numbers are much more reasonable for out RC nitro engines.
You might be disappoint at first at what the real numbers are, but once you realize that engine advertisers are lying through their teeth, you will realize that even the numbers on an X-Dyno are very impressive for an engine the size of .12ci. Considering many full sized car engines do not even get 1BHP for each CI, sing that a 1BHP .12ci engine would make 8.33BHP for 1ci is absolutely impressive.
I will warn you though, X-Dyno is not cheap. A single X-Dyno can put you back about $6000 USD (maybe more or less, I do not know what options are available for it).
07-24-2009 | 07:36 AM
#3
RE: engine dyno?
Here's a cheapie:
http://holeshotrp.tripod.com/
I would say it is a Brake Hp Dyno. You drive an elctric motor as a generator and add electrical load (reduce resistance) until the engine maintains a certain rpm at WOT. You have to repeart this at various speeds to get a graph.
A better method is to use an intertial dyno. Here's a Youtube video of a homemade one:
http://www.youtube.com/watch?v=JYt_u0URcks
Or you can buy an intertial one, but as above, they can be pricey:
http://www.rcdynosystems.com/
However, at a mere (paltry?) $1700 USD, it might be afordable (too pricey for me, but better than $6K). Maybe you can buy one and charge your friends $10 a dyno run for their vehicles?
http://holeshotrp.tripod.com/
I would say it is a Brake Hp Dyno. You drive an elctric motor as a generator and add electrical load (reduce resistance) until the engine maintains a certain rpm at WOT. You have to repeart this at various speeds to get a graph.
A better method is to use an intertial dyno. Here's a Youtube video of a homemade one:
http://www.youtube.com/watch?v=JYt_u0URcks
Or you can buy an intertial one, but as above, they can be pricey:
http://www.rcdynosystems.com/
However, at a mere (paltry?) $1700 USD, it might be afordable (too pricey for me, but better than $6K). Maybe you can buy one and charge your friends $10 a dyno run for their vehicles?
