Another how much HP with a twist....
Moderator: Team
- af2
- Guru
- Posts: 7014
- Joined: Sun Jan 28, 2007 4:42 pm
- Location: Grass Valley, CA :Northern Foothills
Another how much HP with a twist....
I have not found anywhere how to calculate The Brick Aerodynamics of my 33 Willys Coupe to determine the HP from the MPH of 138 MPH. Just wondering since the 377 is coming out and replacing with a totally different set up. The 377 is going into the daughter in laws 57 Chevy. The 33 Willys weighs 2300 lbs. A pic so you can see the brick front.
You do not have the required permissions to view the files attached to this post.
GURU is only a name.
Adam
Adam
Re: Another how much HP with a twist....
Small area, but bores a dirty hole in the air. You already know that.BUT, damn it looks good!
Re: Another how much HP with a twist....
to get a good accurate estimate, id think you would need to know the drag coefficient of the car to do any real math on it. if it were me, id take a swag at it as 2-3mph slower than something like a vette or camaro etc.
- af2
- Guru
- Posts: 7014
- Joined: Sun Jan 28, 2007 4:42 pm
- Location: Grass Valley, CA :Northern Foothills
Re: Another how much HP with a twist....
That was the Question and I think it way more than that... But I don't know and is the reason fore the post.
GURU is only a name.
Adam
Adam
Re: Another how much HP with a twist....
Wallace calculators has front end drag coefficient calculators.
- af2
- Guru
- Posts: 7014
- Joined: Sun Jan 28, 2007 4:42 pm
- Location: Grass Valley, CA :Northern Foothills
Re: Another how much HP with a twist....
Thanks Ron! The hole bored is the reason for the post. My son and I built the chassis for his senior project in 2005 and have ran since 2006. Going faster as years go on.
GURU is only a name.
Adam
Adam
- af2
- Guru
- Posts: 7014
- Joined: Sun Jan 28, 2007 4:42 pm
- Location: Grass Valley, CA :Northern Foothills
Re: Another how much HP with a twist....
I still can not figure it out. Oh well it is not a straight calculation.
GURU is only a name.
Adam
Adam
- af2
- Guru
- Posts: 7014
- Joined: Sun Jan 28, 2007 4:42 pm
- Location: Grass Valley, CA :Northern Foothills
Re: Another how much HP with a twist....
Looking at 3' x 2' then 5'x 1' HMMMM? Total of 5' x 4' ? And Flat?
GURU is only a name.
Adam
Adam
Re: Another how much HP with a twist....
Beautiful car!
There actually is a way to calculate drag coefficient fairly accurately by measuring coast down times...ie 100mph to 50 mph (or whatever you choose). We used to do this in advanced physics back in college...unfortunately that was about a million years ago and I have long since forgotten how to calculate it
There actually is a way to calculate drag coefficient fairly accurately by measuring coast down times...ie 100mph to 50 mph (or whatever you choose). We used to do this in advanced physics back in college...unfortunately that was about a million years ago and I have long since forgotten how to calculate it
- af2
- Guru
- Posts: 7014
- Joined: Sun Jan 28, 2007 4:42 pm
- Location: Grass Valley, CA :Northern Foothills
Re: Another how much HP with a twist....
LOL Travis I never went to physics because the teacher was the most boring person you would meet.travis wrote: ↑Sun Oct 14, 2018 6:35 pm Beautiful car!
There actually is a way to calculate drag coefficient fairly accurately by measuring coast down times...ie 100mph to 50 mph (or whatever you choose). We used to do this in advanced physics back in college...unfortunately that was about a million years ago and I have long since forgotten how to calculate it
GURU is only a name.
Adam
Adam
- af2
- Guru
- Posts: 7014
- Joined: Sun Jan 28, 2007 4:42 pm
- Location: Grass Valley, CA :Northern Foothills
Re: Another how much HP with a twist....
Did you come up with a formula? Thanks Adam
GURU is only a name.
Adam
Adam
-
- Guru
- Posts: 1787
- Joined: Thu Jan 15, 2015 12:19 pm
- Location:
Re: Another how much HP with a twist....
It surely does!!!!!
DV
David Vizard Small Group Performance Seminars - held about every 2 months. My shop or yours. Contact for seminar deails - davidvizardseminar@gmail.com for details.
-
- Guru
- Posts: 5566
- Joined: Sun Feb 19, 2006 10:19 am
- Location: MA
Re: Another how much HP with a twist....
The “brick front” isn’t necessarily bad, it’s the multiple different surfaces, and the overal height of the vehicle.af2 wrote: ↑Sun Oct 14, 2018 4:12 pm I have not found anywhere how to calculate The Brick Aerodynamics of my 33 Willys Coupe to determine the HP from the MPH of 138 MPH. Just wondering since the 377 is coming out and replacing with a totally different set up. The 377 is going into the daughter in laws 57 Chevy. The 33 Willys weighs 2300 lbs. A pic so you can see the brick front.
Plenty of drag under the car too.
Automotive Machining, cylinder head rebuilding, engine building. Can't seem to quit
- af2
- Guru
- Posts: 7014
- Joined: Sun Jan 28, 2007 4:42 pm
- Location: Grass Valley, CA :Northern Foothills
Re: Another how much HP with a twist....
Gees Thanks My son and I appreciate the kind words! Coming from David
and Ron is awesome I will let Nick know! So how do we calculate the drag?
GURU is only a name.
Adam
Adam