[DeTomaso] determine if JFFR scoops are effective
Joseph F. Byrd, Jr.
byrdjf at embarqmail.com
Wed Nov 22 08:00:53 EST 2017
>From the K Busch discussion, a side discussion was the JFFR scoops.
What would be the measurements needed to determine if those scoops are effective.
One of my thoughts would be to use a manometer (digital) insert the sensing side tubing into the scoop until it is at the air filter. The location of the reference tubing then becomes a concern. I have two thoughts.
First is to reference the space where a normal air filter would be getting its air. Given the pressure at the rear window, it would be a measurement of actual benefit,
the second thought is to use a pitot in "clean air" and use the static port. This would be more indicative of the benefit as if on a stationary dyno
ANY thoughts?
-----Original Message-----
From: DeTomaso [mailto:detomaso-bounces at server.detomasolist.com] On Behalf Of Joseph F. Byrd, Jr.
Sent: Monday, November 20, 2017 12:09 PM
To: detomaso at server.detomasolist.com
Subject: Re: [DeTomaso] Kurt Busch Pantera
Here are more ramblings of My troubled mind!
I took a simple Bernoulli conversion approach to get some concept of the magnitudes that are being dealt with by the side scoops, definitely not a true aerodynamics solution.
On Sun, Nov 19, 2017 at 6:49 PM, JFFR <pantera at vtc.net> wrote:
> The side scoops that I am using are 1.5 inches at the widest point and
> are feeding four inch hoses into the sealed air box. My fuel injection
> system can flow about 1100 cfm at full throttle. I don't know how to
> do the calculations, but I am sure that the scoops will supply more
> air than the engine can use. My engine is 388 cubic inches and and
> produces full power at about 6300 rpm. The rev limiter is set at 6550
> rpm and in first gear I need to up shift into second gear pretty
> quickly to keep from hitting the rev limiter. I have only had the car
> up to about 140 mph, but it has never run out of power and was still
> pulling hard at that speed. Public roads can limit how fast you can push a car and safety is always my concern.
>
> I just talked to the owner of the Inde Motorsports Ranch in Willcox
> Arizona today. If any members of the club want to come here, we can
> use the track to test this air box set up on my car. The straight is
> 2200 feet long and I can usually get my Pantera up to 120 mph before
> having to brake for a sweeping right hand turn. The track use is free
> because I work there and it is certainly nice to be able to do this
> without having to worry about breaking any laws or endangering the public!
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