dr_frankenstein
Mad Scientist
- Joined
- Mar 17, 2008
- Messages
- 5,126
As far as ive tested here at home, anything bigger than the 61 wheel starts to over work, I never seen any big noticable gains in the .42 Ar housings with any larger wheel, and the HA is at the advantage since it has a straight discharge and its dry! (just imagine the losses with that 90* foot, us carb guys have)
IMHO the radius is just too tight to move air any faster through it, and it starts to experiance cavitation as the boost pressure rises. its a simple function of flow to area. no matter what the pressure is thru a straw, its only gonna move what it can. For us carb guys this is a huge spot of concern. I cant say exactly what would happen in your situation as ive never studied the housing dry. But for us, the Air/Fuel mixture has a significant weight to it, which changes how the mixture moves through the housing, the tighter it is the more sheer is induced--- the more sheer, the more drop out, the more drop out, the less total room the housing has to move air. and we end up with a big wet garden hose effect thats garbage.
For you, I just dont see much more being squeezed out of the tiny stock housing. with that size wheel, there just is no room for the wheel to do what it does, move air. I really think time is better spent finding a way to adapt the larger housings for use. And thats the direction us carb guys have taken, theres just nuthing left for the stock housing.
and with that in mind, I used to be very big on the stock appearing stuff, having to look as factory as can be................ but after like 5 or 6 races and street cruises......... nobody knew what the hell it was anyways....... like HA or B4B is like alien technology.. so why stay stock...... nobody you want to beat, bragg, or show up.... will probably know either.
Cheers!
A.j.
P.S. ya know......... any of you fellers can call me at anytime..... I is a bored person.... stimulate my mind.
IMHO the radius is just too tight to move air any faster through it, and it starts to experiance cavitation as the boost pressure rises. its a simple function of flow to area. no matter what the pressure is thru a straw, its only gonna move what it can. For us carb guys this is a huge spot of concern. I cant say exactly what would happen in your situation as ive never studied the housing dry. But for us, the Air/Fuel mixture has a significant weight to it, which changes how the mixture moves through the housing, the tighter it is the more sheer is induced--- the more sheer, the more drop out, the more drop out, the less total room the housing has to move air. and we end up with a big wet garden hose effect thats garbage.
For you, I just dont see much more being squeezed out of the tiny stock housing. with that size wheel, there just is no room for the wheel to do what it does, move air. I really think time is better spent finding a way to adapt the larger housings for use. And thats the direction us carb guys have taken, theres just nuthing left for the stock housing.
and with that in mind, I used to be very big on the stock appearing stuff, having to look as factory as can be................ but after like 5 or 6 races and street cruises......... nobody knew what the hell it was anyways....... like HA or B4B is like alien technology.. so why stay stock...... nobody you want to beat, bragg, or show up.... will probably know either.
Cheers!
A.j.
P.S. ya know......... any of you fellers can call me at anytime..... I is a bored person.... stimulate my mind.
Im nots soo gooder at the spoke as you is! Thats what I been saying for years that we needed to get away from the stock housing! it just cant do it! when you reach the point of over loading the wheel, it cavitates and adds heat and reduces flow!
Now throw in the rest of us and we'd be pissing a bunch of guys off just driving down the road.
