99 Suzuki RF600 Air Box

[Lilgem]

Hi all, just after some tech advice on the following if someone has this knowledge please.
I have a 99 Suzuki RF600 engine going into a custom racing rideon lawnmower build just for shits and giggles but the air filter box is too tall and odd shaped to fit under the bonnet. Was informed that these carbs vacuum slides are partially controlled by the air filter box volume etc and that fitting 4 pod filters it would become temperamental and untenable? If this is the case can I make a custom air filter box with the same volume, same size air filter area, same intake to air box size and vac hoses fitted to the same areas of the air box would this work?

[Easy-X]

The main thing an airbox needs to do is distribute air evenly across the cylinders. Pod filters have a couple of inherent drawbacks: inner cylinders (3/4 piston engines) won't get the same air flow and the air flow isn't as consistent across the rev range as the stock airbox. Something to bear in mind.

That being said if it's just a fun project it wouldn't hurt to try a set of pod filters. Worst ways the airflow is poor and you don't get the best performance.
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Royal Enfield Continental GT 535, Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[stinkwheel]

I think Suzukis are less tempremental than most when it comes to pods. You certainly get a lot of them converted to pods.

In the 90's they did a lot of work using pressure wave harmonics to get more power out of sportsbike engines so if it had been a kawasaki, I'd have said don't even go there. A suzuki, more possible because they are based on a really old engine design anyway and so are less fussy.

The ideal, which is what people did back in the day if they knew what they were doing is to fit a stage 3 dynojet kit to the carbs if you're running pods. Most of them contain a set of differently profiled needles, different main jets, different springs and sometimes a drill bit with instructions to drill a hole in the throttle slide in a particular place. Then they'll run acceptably well on pods.

A quick search shows dynojet don't list a stage 3 kit for the RF though. A company called 6 sigma do, not sure if they ship to the Uk though.
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“Rule one: Always stick around for one more drink. That's when things happen. That's when you find out everything you want to know.”
I did the 2010 Round Britain Rally on my 350 Bullet. 89 landmarks, 3 months, 9,500 miles.

[Lilgem]

Thanks for the info but what about the question of making my own air box with all the same volume, air flow and area as the original, would that work?

[jeffyjeff]

[Lilgem]

Yip got the skills and equipment avail to make something as similar as possible so will give it a go, thanks.

[Nobby the Bastard]

Surely if you are going to have to replicate the airbox in dimention etc. It would be far simpler just to use the original airbox.
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trevor saxe-coburg-gotha:"Remember this simple rule - scooters are for men who like to feel the breeze on their huge, flapping cunt lips."
Triumph Sprint ST 1050

[MarJay]

[jeffyjeff]

Probably easier to redesign the bonnet (and use the OE airbox) than to engineer an airbox to fit under the existing one. For a racing lawnmower, I'd toss the bonnet altogether if it meant winning races. It's not a beauty contest, you know.
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History shows again and again how nature points out the folly of men - BOC

[Easy-X]

But! But! Aerodynamics!!!
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Royal Enfield Continental GT 535, Husqvarna Vitpilen 401, Yamaha XSR700, Honda Rebel, Yamaha DT175, Suzuki SV650 (loan) Fazer 600, Keeway Superlight 125, 50cc turd scooter

[jeffyjeff]

Maybe he doesn't want to tip off the competition to what he has done, lest someone take his idea to the next level wit a Hayabusa powered lawn mower.
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History shows again and again how nature points out the folly of men - BOC

[that_impulse_guy]

not wanting to discuss a percentage of hp here or there, effectively the airbox does two things in cv carbs
1) a volume of air..
2) ....that is still...

if you make a box of roughly the same volume, with a nice inlet of similar size, thats about as good as it needs to be.
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Gone: Yamaha DT50lc, Suzuki DR500, Suzuki A100, Kawasaki z250ltd, RD350YPVS, Suzuki DR Big, Kawasaki AR125, Kawasaki KMX200, Suzuki GS1000S, Katana 1100, GS550M, Suzuki RGV250
Now: Suzuki GSX400X, Suzuki RF900R, NS400R

[A100man]