Opinions Wanted Please
-
- Avgas Sniffer
- Posts: 3926
- Joined: Fri Jun 18, 2010 11:29 am
- Location: Oxfordshire
Opinions Wanted Please
So most of you will know bought some TZ bodywork some time ago for my latest project.
Now I want to develop a pressuirised airbox with this bike, but the fairing has two feed options for me.
What I want to know is, which one should I use?
I am leaning towards blanking the one in the nose off and routing the one from the side.
Here are the pictures, just let me know what you think.
Cheers, Ben
Now I want to develop a pressuirised airbox with this bike, but the fairing has two feed options for me.
What I want to know is, which one should I use?
I am leaning towards blanking the one in the nose off and routing the one from the side.
Here are the pictures, just let me know what you think.
Cheers, Ben
- scooble
- Premix Junkie
- Posts: 1549
- Joined: Thu Jul 27, 2006 12:47 pm
- Location: West Sussex
- Contact:
- JanBros
- Avgas Sniffer
- Posts: 3306
- Joined: Wed Jul 26, 2006 11:50 pm
- Location: the land of Francorchamps
my humble opinion -not that you'll listen : don't waste time and energy on presurised airboxes, they are not worth the effort.
only above 200km/h they start to give measurable advantage, and how many times per lap do you run those speeds on a non-prodie 250
on the downside : you add more weight, make the bike a lot more complicated, more possible problems (with the need to preasure the float bowls), a lot harder to work on, especially when jetting and make it more difficult to find the correct jetting.
I would just make an as big as possible airbox and make sure it gets cold air.
only above 200km/h they start to give measurable advantage, and how many times per lap do you run those speeds on a non-prodie 250
on the downside : you add more weight, make the bike a lot more complicated, more possible problems (with the need to preasure the float bowls), a lot harder to work on, especially when jetting and make it more difficult to find the correct jetting.
I would just make an as big as possible airbox and make sure it gets cold air.
My ultimate goal is to die young as late as possible !
-
- Premix Junkie
- Posts: 1587
- Joined: Wed May 16, 2007 2:24 am
.
.
ducting airflow from the backside of your radiator is probably more a concern
if you were starting from scratch youd put a hole through the frame from the side one
the top one isnt really a good shape for catching air from the point of the fairing - but would be easiest to get a duct into the front of your dummy tank and to the top of the airbox - but your steering damper is on that side (currently) - however a single scoop asymetric design might have jetting consequences banked over left or right (high speed)
my previous thoughts were - single heads (due to thermostat) and two radiators (vertical V) with a central duct above the mudguard straight between the cylinders into the airbox
.
ducting airflow from the backside of your radiator is probably more a concern
if you were starting from scratch youd put a hole through the frame from the side one
the top one isnt really a good shape for catching air from the point of the fairing - but would be easiest to get a duct into the front of your dummy tank and to the top of the airbox - but your steering damper is on that side (currently) - however a single scoop asymetric design might have jetting consequences banked over left or right (high speed)
my previous thoughts were - single heads (due to thermostat) and two radiators (vertical V) with a central duct above the mudguard straight between the cylinders into the airbox
- ScottaKR
- Premix Junkie
- Posts: 1521
- Joined: Fri Aug 10, 2007 2:52 pm
- Location: Australia
I'm with KR-1R on this one so far. I wouldn't bother with the pressurised airbox personally, but I do like the idea of a cold air feed.
Aesthetically speaking, I prefer the side duct though. Perhaps if you put a nice large and smooth radius on the left side of the opening of the top feed (looking from the front), it would be more effective at picking up air.
Aesthetically speaking, I prefer the side duct though. Perhaps if you put a nice large and smooth radius on the left side of the opening of the top feed (looking from the front), it would be more effective at picking up air.
KR250 Tandem Twin (Naked)
KR1 Red/White
KR1S Track Bike (has been put on hold for now)
ZXR750 H1 (Winter project)
KR1 Red/White
KR1S Track Bike (has been put on hold for now)
ZXR750 H1 (Winter project)
-
- Avgas Sniffer
- Posts: 3926
- Joined: Fri Jun 18, 2010 11:29 am
- Location: Oxfordshire
That's the thing Danny, I am starting from scratch and that is exactly what I was thinking.KR-1R wrote:if you were starting from scratch youd put a hole through the frame from the side one
This is why I brought this subject up now, because I need to get any and all the fabrication work on the frame done first
-
- Oil Injector
- Posts: 872
- Joined: Mon Sep 07, 2009 8:33 pm
- Location: east yorkshire
I'm going to throw a spanner in the works here ben and suggest that you will get the highest static airbox pressure by designing a duct that takes its supply from smack bang in the middle of the top fairing. This would also give the most 'still' air too.
This might not be possible though with your frame/rad set-up.
There are some very in detailed threads on the rgv forum discussing pressurised airboxes. I believe they are the way to go and i would like to design one for the 3xv one day too
Dan
This might not be possible though with your frame/rad set-up.
There are some very in detailed threads on the rgv forum discussing pressurised airboxes. I believe they are the way to go and i would like to design one for the 3xv one day too
Dan
-
- Oil Injector
- Posts: 872
- Joined: Mon Sep 07, 2009 8:33 pm
- Location: east yorkshire
This one has alot of info in:
http://www.rgv250.co.uk/forums/index.ph ... msearch__1
Also check out barry b's building f250 thread in the f250 section.
Dan
http://www.rgv250.co.uk/forums/index.ph ... msearch__1
Also check out barry b's building f250 thread in the f250 section.
Dan
- si.likes.guiness
- Heavy Smoker
- Posts: 197
- Joined: Sat May 24, 2008 7:49 pm
- Location: chesterfield
- si.likes.guiness
- Heavy Smoker
- Posts: 197
- Joined: Sat May 24, 2008 7:49 pm
- Location: chesterfield