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The Official FX Royal Racing Engine Thread

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The Official FX Royal Racing Engine Thread

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Old 08-05-2016, 11:40 PM
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Originally Posted by toyoter91 View Post
I have been running just the regular medium.

Also, I ran the K3 all weekend at the Sidewinder race in vegas and it's probably the best buggy engine I have ever ran. Feels a lot like a B2101 but with more top end.
Sweet mills but run a JP Dirt and you'll never want to run another engine again. Yes there are some mills out there that get slightly better run time probably but its not worth it compared to how much more smooth and fast the JPs are.
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Old 08-07-2016, 02:13 AM
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Tried reading through the thread for info on any FX on road engines. Anyone know if they have ever produced, currently produce, or plan on producing any .21 on road engines?
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Old 08-08-2016, 10:45 PM
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Originally Posted by Glutton View Post
Tried reading through the thread for info on any FX on road engines. Anyone know if they have ever produced, currently produce, or plan on producing any .21 on road engines?
They were going to make the R9 I believe, but not sure what the holdup is.
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Old 08-09-2016, 12:03 AM
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K3 is same carb? long needle like K5?
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Old 08-09-2016, 07:54 AM
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Originally Posted by gt racing View Post
K3 is same carb? long needle like K5?
Yeah, looks to be the same carb according to the part numbers.
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Old 08-11-2016, 05:27 AM
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Originally Posted by gt racing View Post
K3 is same carb? long needle like K5?
yep EXACTLY the same in every part, barr the liner which has 3 ports.
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Old 08-11-2016, 11:01 AM
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Originally Posted by clarkie_ni View Post
yep EXACTLY the same in every part, barr the liner which has 3 ports.
Not true.

Crankcase, backplate, head button, piston, piston pin, piston pin clips, rod, crank and sleeve are all new part numbers.

The K3 has a shorter stroke than the K5.
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Old 08-11-2016, 12:28 PM
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And a 25.8 main bearing..... which I think it is a bit strange because there is one brand using them and all others with a 14mm crankshaft use a 25.4 bearing.
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Old 08-11-2016, 05:24 PM
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Originally Posted by Roelof View Post
And a 25.8 main bearing..... which I think it is a bit strange because there is one brand using them and all others with a 14mm crankshaft use a 25.4 bearing.
The K5 also runs the 25.8 rear bearing.
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Old 08-11-2016, 06:10 PM
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Originally Posted by toyoter91 View Post
Not true.

Crankcase, backplate, head button, piston, piston pin, piston pin clips, rod, crank and sleeve are all new part numbers.

The K3 has a shorter stroke than the K5.
Plus a bigger bore.
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Old 09-14-2016, 01:15 AM
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any thoughts/experience on the K3 already?
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Old 09-19-2016, 05:27 AM
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Originally Posted by gt racing View Post
any thoughts/experience on the K3 already?
going to get one soon,
but from the people that are running it, its way better on fuel economy when coupled with the new pipe.
on the tracked it seemed exactly the same low end and high end wise as the K5.
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Old 09-20-2016, 03:47 AM
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Looking into getting a K3 for my buggy - have never owned an FX.
I have a bunch of OD97t plugs which I run in my current mills, has anyone tried these in the FX engines?
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Old 09-20-2016, 05:25 AM
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Originally Posted by Mrbigglesworth View Post
Looking into getting a K3 for my buggy - have never owned an FX.
I have a bunch of OD97t plugs which I run in my current mills, has anyone tried these in the FX engines?
the FX plugs are just rebanded OS plugs (p3 and p4 etc).
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Old 09-21-2016, 01:23 AM
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Originally Posted by Mrbigglesworth View Post
Looking into getting a K3 for my buggy - have never owned an FX.
I have a bunch of OD97t plugs which I run in my current mills, has anyone tried these in the FX engines?
I use the OD97T in my K5 with great sucess. The engine does idle great and I had not a single "cut off" during the last 12 liter of fuel.
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