Thanks for the comments guys, I look forward seeing all of you at the time trials.
take a look at http://www.profblairandassociates.com/pdfs/RET_Bellmouth_Sept.pdf
roy
Interesting reading Roy, thanks. The question is...will I get a measurable benefit from a bellmouth? I will try to find one to fit my intake before I go to Bonneville and try it. I have found that every little bit helps in LSR.
It was interesting and as you pointed out maybe not worth a lot, but some. One thing to keep in mind is that the article is concerned with the air that goes into the bell-mouth. We are also concerned with the air that goes around it and is the reason we try and size the opening as close to right as possible to avoid air stacking up in front of it and reducing the aero in that area. We have tried to round the opening.....
........... edges so we are more in the middle between the straight and bell mouth. I think the bell mouth, like they show, without finishing off the sharp outer edges would be bad aero and you might need more HP to overcome that than what you are picking up with the bell mouth. They also criticized the rectangular opening we have on this car and I do see the point there. Mine on the lakester will be round like on Rick's red streamliner.
While we are on this, I feel openings like on the car in the picture (and is one that goes with us) is a disaster. It might have the right amount of square inches of inlet, but it is so narrow top to bottom that I feel a lot of the inlet area is ineffective and not contributing to the air the motor needs. The flat leading edges of the opening probably cause air to pile up there and effect both the air going into the scoop and around it. Neither good. Now saying this the car has set records. I still think it would do better with a more oval shaped opening that could probably be smaller.
c ya,
Sum