Airbox modding

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seb421
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Re: Airbox modding

Post by seb421 »

8541Hawk wrote:
seb421 wrote:
8541Hawk wrote:Interesting thread as I haven't done a lot of airbox mods...yet. :wink:

Though I will add a little info for carb set up.

When running "ram-air" or no air filter (which might be close to some of the High Flow fithers) the HRC\Moriwaki set up was to block the air bleeds and run mains in the 150\160 range. The other thing they had was needles with a fatter mid-range.

While I no longer have my HRC ram-air needles, I do know where they are and I don't believe they are being used, so if needed I might be able to broker some sort of deal....
How much for the needles please id love to have some rare HRC stuff
Let me see if he still has them and what he would want for them......
Thanks very much :)
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lloydie
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Re: Airbox modding

Post by lloydie »

Image
Red line is the air box mod
The blue line is my last base run .
I did mess with the jetting wile there but couldn't get it any better .
but im happy with it for now :lol:
Last edited by lloydie on Sat Aug 11, 2012 10:09 pm, edited 1 time in total.
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seb421
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Re: Airbox modding

Post by seb421 »

lloydiecbr wrote:Image
Red line is the air box mod
The blue line is my last base run .
I did mess with the jetting wile there but couldn't get it any better .
So I'm going back to standard airbox
Do you think that that was the snorkel mod that caused the drop in performance mate, or the gutted bottom half, just got my lloydie special today in the post
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mik_str
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Re: Airbox modding

Post by mik_str »

lloydiecbr wrote:Image
Red line is the air box mod
The blue line is my last base run .
I did mess with the jetting wile there but couldn't get it any better .
So I'm going back to standard airbox
Seems as though you were running rich with the modded box. You would likely see some gain from leaning it out across the board.

Torque curve is pretty nice and smooth....
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lloydie
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Re: Airbox modding

Post by lloydie »

Don't know mate to be honest .
I would need to test a standard lid to find out .
But remember this is only a full throttle run .
But when on the road it feels good and strong so I'm undecided what to do .
1 stick with it
2 revert. Back to standard air box
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lloydie
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Re: Airbox modding

Post by lloydie »

mik_str wrote:
lloydiecbr wrote:Image
Red line is the air box mod
The blue line is my last base run .
I did mess with the jetting wile there but couldn't get it any better .
So I'm going back to standard airbox
Seems as though you were running rich with the modded box. You would likely see some gain from leaning it out across the board.

Torque curve is pretty nice and smooth....
I did lean it off but it ran even worse .
So I upped the mains and it ran a lot better and gave better power throughout
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VTRDark
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Re: Airbox modding

Post by VTRDark »

So does this mean that it's another failure on messing with the airbox?

(:-})
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lloydie
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Re: Airbox modding

Post by lloydie »

cybercarl wrote:So does this mean that it's another failure on messing with the airbox?

(:-})
no as it rides good with better throttle response on the road .
the dyno only shows full open at low revs to the red line( track use ).
ive found the air box mod improves the the power response from small to mid throttle opening across the rev range (road use ).
would i recommend it for road use YES ...
and the best thing is the induction sound .
my exhause is loud but you can only hear the induction noise when your riding it :lol: .
if you got a spare few hours and a spare air box try it you just might like it :beer:

and as you can see from the graph i didnt loose bhp because of the air box i lost it due the how hot it was today
compared to the last run (2-1 test)
so its producing about the same power but with better throttle response
the graph also shows the air box mod makes the bike run leaner .
in the end the only jets that were different between the 2-1 test and the air box test was the 48s slow jets
all other setting were the same
which was annoying coz i tried 190 mains down to 170 mains and 3 different needle clip positions .
if i had 200 mains with me today i would have tried them and i think it would of made more power with them to
as ive found the storm likes it a little rich
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Re: Airbox modding

Post by tony.mon »

That shows on the torque curve, around three extra in the usable part of the rev range for road use, and ties in well with what I'm getting on mine.

I was playing with my airbox again today, and saw that the modified lash-ups that I've made as I'm too tight to spend money on imported stacks fit better with the long one at the rear, so I'll try that.
There's better clearance under the K+N plate.


Only question is, do I then rejet to suit, as the rear is usually set up to run richer.
I know this is mostly for cooling purposes, as the rear cyl will always be a little hotter, and a richer mixture helps to cool it, but there's a question in my mind about whether the richer cylinder also gets the longer stack, partly due to the fuelling difference.

if that's right, then maybe I should put the same mains in both carbs....
Comments welcomed, as ever.
It's not falling off, it's an upgrade opportunity.
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AMCQ46
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Re: Airbox modding

Post by AMCQ46 »

And yes lloydies 2 into 1 is louder than my twin pipes when it was run up on the dyno ...sounded brutal :

Looking at the back to back torque curves, lloydies is better than mine in the 5000 rpm zone by about 5 bhp so that will be noticeable on the road.:
Last edited by AMCQ46 on Sat Aug 11, 2012 9:15 pm, edited 1 time in total.
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scott02464
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Re: Airbox modding

Post by scott02464 »

That's a good result then mate!

If it makes you feel good when using it on the road (where you use it most) then who cares what the dyno says!

Obviously use the dyno results to your advantage but as you say, if it feels strong whilst riding it then good results I say! :-)
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lloydie
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Re: Airbox modding

Post by lloydie »

if the stacks are the same length then the jets should be the same to .(but i know fack all so dont listen to me ) :lol:
i only ever run 1/4 turn extra on the mixture screw so when your at cruse the rear gets a little extra fuel to help it cool.
but when you give it some your on the mains and there big ass mains to boot .
on service my plugs are always the same colour .
unless you pop a lamber censer in each down pipe you will never know if the rear needs a little more fuel .
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seb421
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Re: Airbox modding

Post by seb421 »

is it possible to extend the snorkel with some large diameter hose to come out under the headlight?

with out taking the fairing off and moving stuff out the way i cant remember where the snorkel is rooted too, not touched the bike all weekend as my dad had me laving paving slabs at the weekend
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lloydie
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Re: Airbox modding

Post by lloydie »

No it's as long as it can be .
The frame is in the way
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seb421
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Re: Airbox modding

Post by seb421 »

lloydiecbr wrote:No it's as long as it can be .
The frame is in the way
i know it goes into the headstock area, but when that area is plugged by the snorkel where is it drawing air from?
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