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Re: Real world weight loss program and it` cost..........
[Re: fullmetaljacket]
#1353326
01/02/13 09:27 PM
01/02/13 09:27 PM
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Joined: Feb 2011
Posts: 159
australia
charger410
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member
Joined: Feb 2011
Posts: 159
australia
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I haven't seen light weight globes? Are they LED lights? I must say I hadn't thought about that. The bonnet pins I'm going to have a go at and the alloy steering column. Good ideas because they look stock 
Peter. Australian Charger, alloy block injected 410in, w9 na 9.03@148 leafs 3000lb
1967 barracuda 605 hemi Stage5 millennium 8.2@170
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Re: Real world weight loss program and it` cost..........
[Re: justinp61]
#1353328
01/02/13 11:10 PM
01/02/13 11:10 PM
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Joined: Apr 2009
Posts: 3,416
Toronto
mshred
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master
Joined: Apr 2009
Posts: 3,416
Toronto
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Quote:
I went from 11 X 2 rear drums to Wilwoods with the parking brake and lost 16 pounds. I did something similar to ron on the front bumper brackets and lost 5.6 pounds. I lost over 4 pounds just by going to an aluminum master cylinder.
Ron had his 500" small block for sale the last time I had contact with him, nice guy .
Are those holding up glass or steel bumpers on your dart?
Cool thread Dom!
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Re: Real world weight loss program and it` cost..........
[Re: Thumperdart]
#1353334
01/03/13 05:19 PM
01/03/13 05:19 PM
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Joined: Jan 2003
Posts: 9,876
Weddington, N.C.
Streetwize
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Joined: Jan 2003
Posts: 9,876
Weddington, N.C.
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One more thing about weight. Find out for certain where your fore/aft center of gravity is. Weight ahead of the CG almost always helps ET, weight behind the CG is worth less and losing weight behind the bumper can even slow your ET...even if if picks up your MPH. Reducing your unsprung weight and rotating mass is worth much more than body/chassis weight. IIRC a pound of rotating mass reduction is nearly equivalent to 6pounds of stationary mass. I'd highly recommend reading the Herb Adams book on Chassis Dynamics, Extremely insightful particularly regarding Monocoque vs ladder frame rigidity, ex: boxing in an open ladder with flat plate vs cross bracing can (in many cases) be stronger AND lighter than cross braced tubing. It's also very important to understand the cause and effect of drilling holes in structural members terms of dynamic load forces ( torsional/compression and beaming) 
Last edited by Streetwize; 01/03/13 05:28 PM.
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Re: Real world weight loss program and it` cost..........
[Re: Streetwize]
#1353336
01/03/13 05:39 PM
01/03/13 05:39 PM
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Joined: Nov 2003
Posts: 1,969
Chandler, AZ
Duner
top fuel
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top fuel
Joined: Nov 2003
Posts: 1,969
Chandler, AZ
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Quote:
One more thing about weight.
Find out for certain where your fore/aft center of gravity is. Weight ahead of the CG almost always helps ET, weight behind the CG is worth less and losing weight behind the bumper can even slow your ET...even if if picks up your MPH.
Reducing your unsprung weight and rotating mass is worth much more than body/chassis weight. IIRC a pound of rotating mass reduction is nearly equivalent to 6pounds of stationary mass. I'd highly recommend reading the Herb Adams book on Chassis Dynamics, Extremely insightful particularly regarding Monocoque vs ladder frame rigidity, ex: boxing in an open ladder with flat plate vs cross bracing can (in many cases) be stronger AND lighter than cross braced tubing. It's also very important to understand the cause and effect of drilling holes in structural members terms of dynamic load forces ( torsional/compression and beaming)
OMG - I sure hope that's right about the rotating mass!
I have a different set of wheels and tires coming - that will drop 120 lbs of rotating unsprung weight. I was only HOPING for a 2:1 gain vs the pure weight change. 6:1 would be absolutely fantastic!
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Re: Real world weight loss program and it` cost..........
[Re: Duner]
#1353337
01/03/13 05:51 PM
01/03/13 05:51 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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Duner, Just bear in mind that the rear wheels are driven so that is part of the rotating mass.* The front wheels (assuming your are RWD) would be more likened to unsprung weight although both apply to all 4 wheels. Rotating mass (and the intertia it takes to accelerate it) is most applicable to flywheels, drive shafts, bob weight/crank mass but also ( though somewhat less so) * the wheels and tires. Also all driven loads (behind the motor) are effected by gear reductions and driveline slippage. Check me but it's either 3:1 or 4:1 for rotating mass but it may be much more for crank mass, but in practical terms I believe his formulas assume a mechanical (clutch) drive so slippage losses through a conventional fluid converter will IMO reduce the true Net benefit. With an automatic your engine essentially turns a fluid pump which in turn drives the car's wheels; people don't seem to like to think of it that way, but essentially that's what it is  BTW, Just about any experienced engine builder can tell whether the motor was in a Manual or automatic just by the way it comes apart. Automatics (since they're not direct driven) absorb a lot of the drivetrain shock loads by the time they get back to the crank hub
Last edited by Streetwize; 01/03/13 06:35 PM.
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Re: Real world weight loss program and it` cost..........
[Re: Streetwize]
#1353338
01/03/13 05:59 PM
01/03/13 05:59 PM
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Joined: Nov 2003
Posts: 1,969
Chandler, AZ
Duner
top fuel
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top fuel
Joined: Nov 2003
Posts: 1,969
Chandler, AZ
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Quote:
Duner,
Just near in mind that the rear wheels are driven so that is part of the rotating mass.* The front wheels (assuming your are RWD) would be more likened to unsprung weight although both apply to all 4 wheels.
Rotating mass (and the intertidal it takes to accelerate it) is most applicable to flywheels, drive shafts, bob weight/crank mass but also ( though somewhat less so) * the wheels and tires. Also all driven loads (behind the motor) are effected by gear reductions and driveline slippage.
I'm very anxious to find out how much it helps. Of course, the rest is on a diet as well.
I did see that my little 287 (4.7) Dakota drops 3.5 tenths from bypassing the alternator, power steering and AC idler pulley.
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Re: Real world weight loss program and it` cost..........
[Re: fullmetaljacket]
#1353340
01/03/13 08:52 PM
01/03/13 08:52 PM
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Joined: Mar 2006
Posts: 9,857
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,857
MI, usa
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Quote:
I agree with Wize. My Jack-0 Lee diet plan for the most part has been thoroughly from the B-pillar just behind the doors towards the front. I figured that on an early B-body the CG is just about where the back of the front seats would be bolted.
I keep away from drilling away too much or any material at all from structurally important areas, especially rear quarter panels and roof pillar panels. Just look at the 63' Pontiac "Cheese" cars and the Mopar AFX cars of 65'
What's left to do is: I much rather make the part myself (with a little help from my friends) from exotic metals or save my dimes for the factory lightweight stuff.
Some pictures to come.
Don't forget the seats. Some unobtainium lightweight seat frames, packing crate foam, and some scrap aluminum. You end up with these, 19lbs each including the floor mounts. Hey by the way you could always make a second set of "home made light weight parts" and send them to me,Ha Ha.
Doug
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Re: Real world weight loss program and it` cost..........
[Re: dvw]
#1353341
01/03/13 09:32 PM
01/03/13 09:32 PM
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Joined: Feb 2003
Posts: 6,849
fullmetaljacket
master
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master
Joined: Feb 2003
Posts: 6,849
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Your's a 64' Right?
Those A-100's can be rather light. I had mine made by that infamous Gent that never delivered to anyone else but me. Lucky strike I guess.LOL. They were 20 lbs without the brackets.
The mounting hardware for bracket to seat and bracket to floor are also unobtanium. Some of my seat belt latch brackets are getting a closer unobtanium look as we speak. Seatbelt mounting bolts were professionally made out of the exotic metal by Trick Titanium as a test. They look totally stock but only saved an 1/8 of a pound. Thanks to the heavens that I did not pay for those. LOL.
The B-pillar post covers in the interior are a bit porky for their size. Real thin gauge Aluminum copies can make the cut because there is no structural importance other than visual. If I make another set, I'll send you a pair. I did not fool with the roof cross rail because of structural.
Sun visors and hardware can set you back 3 Lbs.
Interior Dome light 3/4 lb.
Down underneath, throw that galvanized transmission convertor inspection cover in the gutter, more cooling air for the Convertor and if you must run it, make it out of Aluminum.
Last edited by fullmetaljacket; 01/03/13 09:43 PM.
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Re: Real world weight loss program and it` cost..........
[Re: fullmetaljacket]
#1353342
01/04/13 12:23 AM
01/04/13 12:23 AM
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Joined: Mar 2006
Posts: 9,857
MI, usa
dvw
master
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master
Joined: Mar 2006
Posts: 9,857
MI, usa
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Quote:
Your's a 64' Right?
Those A-100's can be rather light. I had mine made by that infamous Gent that never delivered to anyone else but me. Lucky strike I guess.LOL. They were 20 lbs without the brackets.
The mounting hardware for bracket to seat and bracket to floor are also unobtanium. Some of my seat belt latch brackets are getting a closer unobtanium look as we speak. Seatbelt mounting bolts were professionally made out of the exotic metal by Trick Titanium as a test. They look totally stock but only saved an 1/8 of a pound. Thanks to the heavens that I did not pay for those. LOL.
The B-pillar post covers in the interior are a bit porky for their size. Real thin gauge Aluminum copies can make the cut because there is no structural importance other than visual. If I make another set, I'll send you a pair. I did not fool with the roof cross rail because of structural.
Sun visors and hardware can set you back 3 Lbs.
Interior Dome light 3/4 lb.
Down underneath, throw that galvanized transmission convertor inspection cover in the gutter, more cooling air for the Convertor and if you must run it, make it out of Aluminum.
Ah, but they only look like A-100. Trans shield,visors,dome all gone. I have to confess I believe I've been outdone in the trickery dept.
Doug
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Re: Real world weight loss program and it` cost..........
[Re: dvw]
#1353343
01/04/13 12:34 AM
01/04/13 12:34 AM
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Joined: Feb 2003
Posts: 6,849
fullmetaljacket
master
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master
Joined: Feb 2003
Posts: 6,849
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Re: Real world weight loss program and it` cost..........
[Re: fullmetaljacket]
#1353344
01/04/13 02:52 AM
01/04/13 02:52 AM
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Joined: Jan 2007
Posts: 2,431
SK,Canada
gregsrt
top fuel
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top fuel
Joined: Jan 2007
Posts: 2,431
SK,Canada
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Some good reading here, you guys have my hamster running now.
An association of men who will not quarrel with one another is a thing which has never yet existed, from the greatest confederacy of nations down to a town meeting or a vestry.
Thomas Jefferson
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