Joined Jul 2001
3K Posts | 1+
El Sobrante, Ca. 94803
Taffy said:
I formed just such a piece last year for a CRF 450 Dirttracker. When I have a moment I will snap off a couple of pictures.
Dale
A velocity stack, what can it do for you?
- Thread starter Smorgasbord
- Start date
I formed just such a piece last year for a CRF 450 Dirttracker. When I have a moment I will snap off a couple of pictures.
Dale
Joined Jul 2001
3K Posts | 1+
El Sobrante, Ca. 94803
husabutt said:
Unfortunately and speaking from first hand experience the above performs poorly even for the intended application. :?
Looks kinda cool though!
For what it may be worth:
Getting the air to turn without a significant density reduction proved to be quite a challenge. I spent hours on an air box only to scrap it as I was down five horsepower from OEM. The open radius runner was even worse. Both had the right numbers and looked promising on paper, alas they both failed miserably in the real world.
Best regards,
Dale
Joined Feb 2003
3K Posts | 384+
Escondido, Ca. USA
Wouldn't the fact that it is almost a straight shot to the carb increase airflow as opposed to say the 90 degree bend that a Husaberg has?LINEAWEAVER said:husabutt said:
Unfortunately and speaking from first hand experience the above performs poorly even regarding the intended application. :?
Looks kinda cool though!
Dale
The husaberg intake looks sort of restrictive although they seem to run pretty good
Joined Jul 2001
3K Posts | 1+
El Sobrante, Ca. 94803
Wouldn't the fact that is is almost a straight shot to the carb increase airflow as opposed to say the 90 degree bend that a Husaberg has?
The husaberg intake looks sort of restrictive although they seem to run pretty good
Well, I thought so.
Unfortunately the volume of the OEM Husaberg air boot proved to be of more importance then that of a smooth radius. :? Based on signal monitoring during dynamometer testing I believe the constant ID radius acts as a choke.
Joined Jul 2001
3K Posts | 1+
El Sobrante, Ca. 94803
husabutt said:
Indeed! Considering the rear shock is where the air box should be. :lol:
Such is evident compromise between power and handling.
Best Regards,
Dale
Joined Nov 2001
17K Posts | 774+
Ely, England
it makes sense to me that to make air go where you want it to it has to be squeezed into an ever decreasing space?
whenever i think of air i think of cattle or sh... (oh shugar there i go again :lol: :lol: :lol: !) they'll stray if they can...
so that tube wants to be a curved trumpet then and not a curved tube....
big entry to that K and N.
regards
Taffy
whenever i think of air i think of cattle or sh... (oh shugar there i go again :lol: :lol: :lol: !) they'll stray if they can...
so that tube wants to be a curved trumpet then and not a curved tube....
big entry to that K and N.
regards
Taffy
Joined Jul 2001
3K Posts | 1+
El Sobrante, Ca. 94803
Taffy said:
Truthfully, I had to first constrict the opening, then diverge into a plenum for the radius and finally constrict once again just prior to the velocity stack. Such was quite the learning experience regarding inlet requirements.
Joined Jul 2001
3K Posts | 1+
El Sobrante, Ca. 94803
Joined Jun 2005
449 Posts | 1+
Kings Farth
Now, with the wealth of knowledge generously shared by you guys at this forum, I know I won't bother even to consider a velocity stack. Thanks.
BTW, Santa is a gnome.
BTW, Santa is a gnome.
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