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Re: Real world weight loss program and it` cost..........
[Re: fullmetaljacket]
#1353366
01/06/13 12:33 AM
01/06/13 12:33 AM
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Joined: Jul 2004
Posts: 19,318
State of confusion
Thumperdart
OP
I Live Here
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OP
I Live Here
Joined: Jul 2004
Posts: 19,318
State of confusion
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When I first posted this I thaught it would dwindle away fairly soon but it`s nice to see topics like this reveal some cool stuff and really appreciate the stuff you guys are lettin out of the bag.  I`m driving myself  looking at any and every way to make it light and keep it safe............it`s gonna be a while till I`m happy............. 
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: Real world weight loss program and it` cost..........
[Re: tboomer]
#1353372
01/06/13 11:15 AM
01/06/13 11:15 AM
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Joined: Jan 2003
Posts: 3,059
Swamps of South Jersey.
wildcargo
master
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master
Joined: Jan 2003
Posts: 3,059
Swamps of South Jersey.
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My 64 Dodge B-body 2840 with out driver 3080 with ready to race. you can go to my web site and see photo page www.wildcar-go.itgo.com It is all steel but the front bumper and interior o yes lexan windows it is a cast iron block aluminum head motor
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Re: Real world weight loss program and it` cost..........
[Re: dvw]
#1353374
01/06/13 02:24 PM
01/06/13 02:24 PM
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Joined: Jan 2003
Posts: 9,876
Weddington, N.C.
Streetwize
master
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master
Joined: Jan 2003
Posts: 9,876
Weddington, N.C.
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This has been a good thread for sure! I guess the key thing to look for are "ands"....it saves weight AND enhances dynamic weight transfer. And all weight is logically not equal. Weight in front of the front axle centerline is worth more than weight behind the rear cl. Also remember the physics of it because it's not only losing weight but also relocating weight that can be helpful. Ex: on an A body if you remove the fuel tank directly behind the axle and replace it with a 12 gal fuel cell that fits perfectly inside the trunk spare tire well, on paper you're not saving much weight but you are moving that (necessary) fuel weight about a foot Lower and 2+ feet further back behind the rear axle Cl in the chassis which effects the cg and your dynamic weight transfer. Not all weight you remove is always beneficial, on my 73 duster removing the Rear bumper reinforcement (about 13 pounds 4 feet back from The axle cl) actually hurt my 60 foot times. 13 pounds 4 feet back has the dynamic leverage of 52 pounds only 1' back.....so dynamically that 13 pounds did an extra 39 pounds of 'good' planting the tires on the launch. Every .01 you can drop on your 60 is usually worth several .01 in the 1/4, depending on your weight. 
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Re: Real world weight loss program and it` cost..........
[Re: Streetwize]
#1353377
01/06/13 07:22 PM
01/06/13 07:22 PM
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Joined: Jan 2010
Posts: 803
Idabel,Oklahoma
Gary Robbins
super stock
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super stock
Joined: Jan 2010
Posts: 803
Idabel,Oklahoma
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Quote:
Thumper...
I don't know where your cell is, just saying the A body spare tire well is a natural fit for a 12 gallon Jaz or equivalent, for the same volume of fuel/wt it's a nice extra lever getting the tires to hook on the launch. My only point is the further back (generally) the more it help.
Only a 5 gallon,but it's how i did mine(sorry for crappy pic)
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Re: Real world weight loss program and it` cost..........
[Re: Big Squeeze]
#1353380
01/07/13 12:27 AM
01/07/13 12:27 AM
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Joined: Jan 2003
Posts: 9,876
Weddington, N.C.
Streetwize
master
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master
Joined: Jan 2003
Posts: 9,876
Weddington, N.C.
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Big, It was a very nose heavy b motor A body/727...no sway bar, worn shocks, the weight on the back helped the 60'...ran this car in street trim with McCreary Dirt Track tires...20+ years ago. I've added rear ballast (and net weight) to several cars and ET'd quicker...what's to get?? The Duster was 3380+ pounds so...13 pounds is well less than one half of one percent of the total weight. I'll stand on my every hundredth (.01) of ET drop is typically worth several hundredths on the big end, and a tenth (.10) 60' drop is typically worth more than .15 in the quarter for most cars of reasonable power to wt ratios  Those Wallace Racing Calculators are pretty useful (at least reasonably accurate) for estimating potential ET variables
Last edited by Streetwize; 01/07/13 12:49 AM.
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Re: Real world weight loss program and it` cost..........
[Re: Big Squeeze]
#1353384
01/07/13 12:58 AM
01/07/13 12:58 AM
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Joined: Mar 2006
Posts: 9,856
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,856
MI, usa
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Quote:
Quote:
Not all weight you remove is always beneficial, on my 73 duster removing the Rear bumper reinforcement (about 13 pounds 4 feet back from The axle cl) actually hurt my 60 foot times. 13 pounds 4 feet back has the dynamic leverage of 52 pounds only 1' back.....so dynamically that 13 pounds did an extra 39 pounds of 'good' planting the tires on the launch. Every .01 you can drop on your 60 is usually worth several .01 in the 1/4, depending on your weight.
I'm having a hard time with this...was your car spinning the tires after removing the bumper reinforcement? And if so, did you do anything to loosen up the front end to get more weight transfer? 
BTW a tenth gained in 60' is typically worth 1.5-2 tenths in the 1/4... 
In the past I added rear weight that helped as well. Now I'll take weight off anywhere. There's stuff a lot faster and more nose heavy than mine that hook on 10.5s. Just a matter of figuring out the suspension. Nobody said it was going to be easy
Doug.
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