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Old 04-06-2012, 06:52 PM   #1
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Questions?? MRX4X vs. MRX5?

Hello RCTech community. I couldn't find anything concrete or direct which explains what the difference between an MRX4X and MRX5. My main question is there a huge difference in handling? durability? etc. Is it even possible to upgrade an MRX4X to MRX5 spec level? Should I just save the extra dollars and buy an MRX5 with all the bells and whistles? At the moment, I'm leaning towards just and MRX4X in which I'll be dropping a Nova motor eventually. Let me know your thoughts.
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Old 04-06-2012, 07:02 PM   #2
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i have a 4x. It has been the best in its class. Now that there is a new generation of cars, it is obviously older but still competitive. For a non pro driver i don't think you can make an argument against the 4x. Buying parts or a complete car on ebay is half the price of a current car. Its fun owning the latest but unless you are racing against the top world drivers you should be fine with the 4x.

the 4x is probably more durable. the 5 has new ways to adjust the set up of the car. its a different car altogether. the 5 has also been known to have radio problems, possibly from the receiver box. the 5 also has a new clutch design.
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Old 04-12-2012, 09:15 AM   #3
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Default MRX5 is simply the best car out!

I,m a team driver for Mugen and this car is as good as it gets should be called cheating as for the reciever problem Airtronics had a bad batch of recievers when that problem was occuring.
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Old 12-30-2013, 05:43 AM   #4
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Default mugen mrx5 vs mugen mrx4

I'm a team mugen driver and I would not argue that it's better to move forward as it provides a better performing car which helps you as a driver to perform at your best. .step up and buy the mugen mrx5 you will love the fact you did so!!
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Old 12-30-2013, 06:49 AM   #5
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Any starter or even average racer has no need to have the latest stuff. The MRX4-X is a very good car but is starting to get difficult with the parts but even then there are alternitives like some MRX5 parts and other brand parts. (axles, pulleys etc)

Even Picco has proven the car is competive with any newer model on many events

The new MRX5 clutch is better and is a direct fit on the older MRX models so no need to have a MRX5.

On the other hand, be aware a used MRX4 can have some play and worn out parts which does have an effect on the total costs and the driveabillity.
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Old 12-31-2013, 11:54 AM   #6
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Quote:
Originally Posted by Roelof View Post
Any starter or even average racer has no need to have the latest stuff. The MRX4-X is a very good car but is starting to get difficult with the parts but even then there are alternitives like some MRX5 parts and other brand parts. (axles, pulleys etc)

Even Picco has proven the car is competive with any newer model on many events

The new MRX5 clutch is better and is a direct fit on the older MRX models so no need to have a MRX5.

On the other hand, be aware a used MRX4 can have some play and worn out parts which does have an effect on the total costs and the driveabillity.
Picco won the US Nitro World Cup in the beginning of December with a Mrx4X.
I don't run 1/8, but would have a mrx5 wc or seroent 977 if I did.
the 4x is still a great car
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Old 01-06-2014, 05:07 PM   #7
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Quote:
Originally Posted by Roelof View Post
Any starter or even average racer has no need to have the latest stuff. The MRX4-X is a very good car but is starting to get difficult with the parts but even then there are alternitives like some MRX5 parts and other brand parts. (axles, pulleys etc)

Even Picco has proven the car is competive with any newer model on many events

The new MRX5 clutch is better and is a direct fit on the older MRX models so no need to have a MRX5.

On the other hand, be aware a used MRX4 can have some play and worn out parts which does have an effect on the total costs and the driveabillity.
roelof,what is the difference in clutches from the 4 to the 5 and what makes it so much better? thanks,mike.
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Old 01-07-2014, 12:22 AM   #8
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The 5 comes with a "reverse type clutch"

The old type is using flyweights rotating over the pins but also moving forward over the pin. Because the flyweight does not stay in a straight line it will have some friction.

The reverse type the flyweights just rotate over the pins without moving forward. It is faster in reaction and still much smoother and does give more pressure force on the clutch shoe.
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Old 01-07-2014, 06:24 PM   #9
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Originally Posted by Roelof View Post
The 5 comes with a "reverse type clutch"

The old type is using flyweights rotating over the pins but also moving forward over the pin. Because the flyweight does not stay in a straight line it will have some friction.

The reverse type the flyweights just rotate over the pins without moving forward. It is faster in reaction and still much smoother and does give more pressure force on the clutch shoe.
thank you for the reply.
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Old 01-13-2014, 12:34 AM   #10
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Alberto Picco was running his Mugen MRX4x at the 2013 Euros in Halifax, going perfectly well.

He obviously knows the car front to back and upside down, and doesn't want to change what he knows, he's one of those drivers who makes a living out of 1/8 through his engine brand, so he can run what ever car he likes and chooses to stick with the MRX4 for a reason. He's under no pressure from sponsors to run the latest and greatest he just runs what he thinks will serve him best.

Take from that what you will.
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