SR500 Project

bradj said:
Fa hu agg hit
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It's so sad to see the status of our education system, when you get people that can't even spell their own name. Shame really
 
Oh I'm making it even if I have to push this little bitch. It's not that far.
 
Got a lot done tonight.
Grabbed the stock harness
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In good shape but shitty looking.
An exacto knife and 20 minutes later the sheathing was removed and then I spent an hour mulling over the wiring diagram ad ended up cutting one metric fuck ton of useless shit out of the harness. Blinkers, blinker relay, ignition switch, blinker auto cutoff, etc.
wrapped it all back up and it's less than half the original size.

Next up I needed somewhere to put the stupid huge CDI and reg/rect. So I welded in some sheet to the bottom of my seat gussets, I think it came out really well. Functions as a rear fender as well and an airbox of sorts.
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So who thinks this is going to cause an airflow issue? The box has holes in both sides, open front and back.
I'm a little concerned but don't know if I should be.
I have considered cutting the shape of the filter out of the electronics pan so the filter comes out of the bottom.

Thoughts?
 
SONIC. said:
So who thinks this is going to cause an airflow issue? The box has holes in both sides, open front and back.
I'm a little concerned but don't know if I should be.
I have considered cutting the shape of the filter out of the electronics pan so the filter comes out of the bottom.

Thoughts?
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To be quite honest, I fail to visualize the air box - if you could provide some additional photos, it might help.
Having said that, I believe that having holes on both sides, fore and aft, kind of contradicts/negates the principle of an airbox, doesn't it?

M.
 
It's not really an airbox, just somewhat encloses the uni filter and protects it from debris.
 
No comment on the airbox but I I dig the brake bracket. It looks really clean.

Also, it's good to see someone else measures in "metric fuck ton" like I do.
 
You could speedhole the pan near the filter...or maybe use some flexible ducting to place the filter elsewhere, at a greater distance from the carb? Maybe that could also help get a smoother airflow into the carb, rather than the turbulent air that's just been pulled through a gajillion pores in the filter.

Airtech sells ducting specificially made for smooth airflow, IIRC, but probably at a much greater upcharge than if you could locate the same sorta thing at McMaster or Grainger or whatever...

I've seen a filter placed forward-facing in front of the engine to get a cold-air, ram-air effect, but then you're also dealing with tuning the length to get the resonator effect right (per the guys who built it, not that I know jack about tuning an intake beyond parroting what these guys told me...they ended up doing things like swaging the needle with sandpaper at specific points, so it was a big undertaking to get it to run right.)
 
The important thing to remember is not the apparent size of your filter, but your throat opening in your carb. How big is it, what's the area? Doing some quick math, if you have a 38mm diameter carb, using the area formula of pi*r^2, you get an area of 1134 sq.mm. If, for example, you wanted to use 1" diameter holes in the sides of your airbox, each 1" hole has an area of 507 sq.mm. So at a minimum, you would at least need 3X 1" holes to not "starve" the airbox for air. Any more holes, and the velocity of the air going through said holes just decreases.
 
Joe Suzuki said:
The important thing to remember is not the apparent size of your filter, but your throat opening in your carb. How big is it, what's the area? Doing some quick math, if you have a 38mm diameter carb, using the area formula of pi*r^2, you get an area of 1134 sq.mm. If, for example, you wanted to use 1" diameter holes in the sides of your airbox, each 1" hole has an area of 507 sq.mm. So at a minimum, you would at least need 3X 1" holes to not "starve" the airbox for air. Any more holes, and the velocity of the air going through said holes just decreases.
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This is good info! I hadnt thought of it that way.
The "box"itself is wide open. I'll get some more pictures tonight that show it a little better.
 
Drey6 said:
No comment on the airbox but I I dig the brake bracket. It looks really clean.

Also, it's good to see someone else measures in "metric fuck ton" like I do.
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Thanks man, it needs some more cleanup but currently I'm in "build and assemble for testing before making it pretty" mode
It's so nice to have the right tools. It would have taken hours and hours to perfect an adapter bracket as opposed to just welding and drilling.
I am going to have so much powdercoating to do :eek:
 
AgentX said:
You could speedhole the pan near the filter...or maybe use some flexible ducting to place the filter elsewhere, at a greater distance from the carb? Maybe that could also help get a smoother airflow into the carb, rather than the turbulent air that's just been pulled through a gajillion pores in the filter.

Airtech sells ducting specificially made for smooth airflow, IIRC, but probably at a much greater upcharge than if you could locate the same sorta thing at McMaster or Grainger or whatever...

I've seen a filter placed forward-facing in front of the engine to get a cold-air, ram-air effect, but then you're also dealing with tuning the length to get the resonator effect right (per the guys who built it, not that I know jack about tuning an intake beyond parroting what these guys told me...they ended up doing things like swaging the needle with sandpaper at specific points, so it was a big undertaking to get it to run right.)
Click to expand...

I'd prefer not to have to run an intake, the speed holes may end up being what I go with. Then I have to buy a dimple die though 8)
 
Noooooooo
I accidentally bought an rd400 and am mid engine rebuild.
Then I accidentally bought a xs650 and am mid wiring harness making.

Fuck me I need to get back to this thing
 
I also suffer from too-many-projects-not-enough-time-itis. It's apparently a huge problem around here.
 
Fuck me i need to bla bla bla bla
tell your storie in the truck and lets go
 
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