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I'm going to order the Metmachex swingarm in a couple weeks. They were very prompt to respond to my questions and the part fits my requirements nicely. They are located in the UK, not far from Nottingham.
Brocks swingarm appears stronger and better suited to very high performance applications but they seem less interested in making a more-or-less drop-in replacement. They are advertised as fitting 07-17, require custom brake bracket with reaction rod, and are wider than stock (which requires wider top shock mounts). That's all great for some, but I like the narrow arm and all that entails, and my brake setup is also fine. Combined with the significantly higher cost and less appealing (to me) appearance, Brocks doesn't seem to be the choice for me.
Per Metmachex:
The Swingarm is exactly the same as the stock Swingarm by way of fitment, it does come with with new spherical bearing, new bushing, and standard diameter spindle.
But because yours is a 1999 model there could be 2 types of brake caliper as this is the year they changed over. Could you supply us with a picture or two of your Swingarm you currently have so we can see which one you would need.
There is no difference in the price. Our Swingarm are a lot lighter and stronger than stock. The weight is around 5.8kg. The price is Ł650 plus postage.
We take Ł50 deposit on order, the rest payable on completion.
Regards,
Tamsyn
Metmachex Swingarms LTD
Last edited by cggorman; Oct 23, 2018 at 04:05 PM.
Started getting most of the parts together for my little flow bench. Still waiting on the honeycomb and anemometer.
The basic setup. Bilge blower and a variable power supply so I should theoretically be able to provide 0-130 CFM. 12" length of clear acrylic tube to see how air is exiting the elbow. I stuffed some tightly packed straws into the outlet end because the air was pretty turbulent (thanks Mythbusters, it worked pretty good!)
Chauvet Hurricane 1000 fog machine for fog on demand. Added a little hose to outlet so I can direct it. Waiting on another controller for it so I can alter the pump speed. Not sure exactly what it will do, but I like to play. It's a sickness.
I made a crude bellmouth from foam to help with inlet turbulence.
Last edited by cggorman; Oct 25, 2018 at 04:33 PM.
I'm surprised by the early results. The greatest flow density/velocity seems to be at the inside of the bend. Regardless of where I introduce fog or thread, it exits the short side.
Right now the tube has a wrinkle finish on the outside half (roof) of the interior and a gloss finish on the floor. I'm going to polish it next and see how that affects flow.
Lol, yeah. I was popular at my last job because they could put me on almost anything that needed done...and I worked for peanuts.
Sanded and polished the interior. The roof is polished and the floor is sanded to about 600 grit.
Flow is a lot less turbulent but still biased toward the floor. I think I'm gonna run out tomorrow and get some clay to simulate the carb throat and play with the shape of the bend a bit.
I couldn't get a decent shot of the thread or fog, but here...
That's certainly not my intent! Just sharing my journey. I like to "experiment" and learn. Sometimes it works out and sometimes it doesn't. Maybe somebody else out there can either teach me or learn from me.
Here are a couple shots post-polish. Not very illustrative, but it's something.
Not sure what kind of flow rate I've got here, but it's maybe 70% of max for this blower. I sized the blower to be around the same theoretical flow as my engine at red line so I figure this is near representative of cruise RPM...maybe?
I'll verify the actual flow rates on the engine and bench once the anemometer gets here.
Last edited by cggorman; Oct 25, 2018 at 10:30 PM.
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