scootz
|
| posted on 18/12/08 at 04:13 PM |
|
|
Airbox... Or Not?
What's the general consensus on this one?
My engine (V8) is mid-mounted and there's a central-scoop on the bodywork to facilitate air-flow to the area of the throttle body trumpets.
The easiest route would to be fabricate 2 simple back plates for each set of throttle bodies and use a 'sausage' style airfilter on
both.
I'm a little concerned however that the air from the 'scoop' will just get lost under the rear bodywork and that the engine will
suck up warm air rising from the block below.
Am I over-worrying... or should I use something like the the Pipercross Viper / BDA systems to direct filtered air into an airbox?
|
|
|
|
|
hellbent345
|
| posted on 18/12/08 at 04:43 PM |
|
|
i recon the suction will be sucking at the air coming in from the scoop anyway, but if the air isnt directed over the trumpets enclosed like, then the
warm air is going to mingle, as there isnt anything cordoning off the cold air from the warm. so if you need ultimate cold air, fashion an
airbox/catch box that will catch the air and funnel it straight to the trumpets, and stop the warm air from mingling with it (ie box is airtight to
the engine bay)
thats what i recons
al
|
|
|
scootz
|
| posted on 18/12/08 at 04:58 PM |
|
|
Good 'reckon' Al... I was thinking about making something like this for each cylinder bank...
HERE (not paying £200 each!).
|
|
|
BenB
|
| posted on 18/12/08 at 05:11 PM |
|
|
I'd say it depends very much on how much space there is. A small airbox will strangle the engine horribly. I'd be tempted to put some
baffles to "guide" the cool air towards the trumpets (with sausages as they're easy to fit) but I'm not sure I'd be
bothered enough to make a hermetically sealed airbox!
Personally I'd go for whatever is simplest. Recently I've been busy with my homebrew beer and there's an interesting difference in
attitude between LB and the homebrew forum.
On LB, you ask a question and you get 10-20 different technically clever answers. The answer on the homebrew forum is usually "stop bothering
about it and get on with making some beer"....
Trouble is I like pedantic problem solving and trying to squeeze the last % of efficiency out of a situation  Then again, this year I've
probably spent 50 hours fettling and 5 hours driving. Perhaps the answer is to go for the best easy option and avoid the
just-a-little-bit-better-but-horribly-complicated options....
|
|
|
iiyama
|
| posted on 18/12/08 at 05:22 PM |
|
|
How about something like this:-
Carbon or glass sir?? Your choice!!!!! 
If its broke, fix it. If it aint broke, take it apart and find out how it works!
|
|
|
scootz
|
| posted on 18/12/08 at 05:52 PM |
|
|
Very nice!
|
|
|
zilspeed
|
| posted on 18/12/08 at 06:18 PM |
|
|
If it's any help, cars with airboxes sound much better.
It focuses all the intake roar and points it forward of the car rather than an unfocused din coming out the side.
I vote for an airbox - for no ther reason.
Oh yeah, cold air is good too.
|
|
|
minitici
|
| posted on 18/12/08 at 07:05 PM |
|
|
You can never tell which way air is likely to flow into (out of) scoops.
All depends on bodyshape, aerodynamics relative pressures and who knows what else!
|
|
|
zilspeed
|
| posted on 19/12/08 at 08:15 PM |
|
|
quote:
Originally posted by minitici
You can never tell which way air is likely to flow into (out of) scoops.
All depends on bodyshape, aerodynamics relative pressures and who knows what else!
I'm just remembering John Fyda's vision V87 at Ingliston coming into Arena.
Sounded bleedin' marvelous. He had a forward facing aribox. All the cars with side facing foam filters sounded crap in comparison.
I know I will be slated for this entirely unscientific point of view, but I'll burn those bridges when I come to them... 
[Edited on 20/12/08 by zilspeed]
|
|
|
