Re: Is it worth it to set the rear shocks straight vertical?
[Re: GY3]
#2291503
04/21/17 12:11 PM
04/21/17 12:11 PM
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Joined: Jul 2004
Posts: 19,318
State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,318
State of confusion
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Made a hugh difference on my Dart and most of the fastest cars on the planet have em that way for a reason...........
Last edited by Thumperdart; 04/21/17 12:11 PM.
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: Is it worth it to set the rear shocks straight vertical?
[Re: GY3]
#2291510
04/21/17 12:18 PM
04/21/17 12:18 PM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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Shocks will be most effective when they operate in the same arc as the suspension travel.
"use it 'till it breaks, replace as needed"
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Re: Is it worth it to set the rear shocks straight vertical?
[Re: GY3]
#2291532
04/21/17 01:16 PM
04/21/17 01:16 PM
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Joined: Oct 2007
Posts: 3,978
Hilltown Pa
1967dartgt
master
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master
Joined: Oct 2007
Posts: 3,978
Hilltown Pa
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Yes helped my car a lot, I see no ill effects on the street from making the change. It seems to handle and ride the same, of course I didn't build my car for cornering. I would recommend it.
Brett Miller W9 cnc'd heads
STR Chassis fabraction
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Re: Is it worth it to set the rear shocks straight vertical?
[Re: GY3]
#2291534
04/21/17 01:18 PM
04/21/17 01:18 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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You have to look at where the "applied load" will be.. a drag car its simple.. but on a road race car its a different applied load.. so number one thing is to figure out what will the car be used for.. then work from there.. I set my Rampage up as a drag/street car but with the drag race part as the primary.. so I put the shocks in vertical and it also has ladder bars with a diagonal link so it doesnt like to go around corners but it does it fine.. with ladder bars the rear end doesnt like to twist in the chassis(very rigid) but works great in a forward motion 
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Re: Is it worth it to set the rear shocks straight vertical?
[Re: GY3]
#2291549
04/21/17 01:50 PM
04/21/17 01:50 PM
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Joined: Jan 2005
Posts: 3,635
Oakland, MI
dizuster
master
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master
Joined: Jan 2005
Posts: 3,635
Oakland, MI
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Shocks see more vertical load when they are angled. A 30 degree shock will see approximately 15% more load (and need to be 15% stiffer) to act the same way as vertical shock. The further the angle, you're trading vertical stability vs. side to side stability. For what it's worth, Mark Mencer ( http://www.menscermotorsports.com/) told me not to bother going through the trouble to make mine vertical. My car has been a best of 1.38 60ft on 275 radials at 3740lbs with caltracs. If you were building a new car from scratch I would surely make them vertical, but I can tell you mine has been fine on the factory angles down to the mid 9's.
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Re: Is it worth it to set the rear shocks straight vertical?
[Re: dizuster]
#2291774
04/21/17 09:00 PM
04/21/17 09:00 PM
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Joined: Dec 2013
Posts: 4,684
Wichita
GY3
OP
master
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OP
master
Joined: Dec 2013
Posts: 4,684
Wichita
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Shocks see more vertical load when they are angled. A 30 degree shock will see approximately 15% more load (and need to be 15% stiffer) to act the same way as vertical shock. The further the angle, you're trading vertical stability vs. side to side stability. For what it's worth, Mark Mencer ( http://www.menscermotorsports.com/) told me not to bother going through the trouble to make mine vertical. My car has been a best of 1.38 60ft on 275 radials at 3740lbs with caltracs. What shocks do you use? If you were building a new car from scratch I would surely make them vertical, but I can tell you mine has been fine on the factory angles down to the mid 9's.
'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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Re: Is it worth it to set the rear shocks straight vertical?
[Re: dizuster]
#2292079
04/22/17 01:26 PM
04/22/17 01:26 PM
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Joined: Dec 2003
Posts: 22,696
Bitopia
jcc
If you can't dazzle em with diamonds..
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If you can't dazzle em with diamonds..
Joined: Dec 2003
Posts: 22,696
Bitopia
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Shocks see more vertical load when they are angled. A 30 degree shock will see approximately 15% more load (and need to be 15% stiffer) to act the same way as vertical shock. The further the angle, you're trading vertical stability vs. side to side
My thinking is they actually see less load, and they need to be stiffer to effect the smaller load they are seeing at a steeper angle ,to exert the same final amount of overall control? 
Reality check, that half the population is smarter then 50% of the people and it's a constantly contested fact.
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Re: Is it worth it to set the rear shocks straight vertical?
[Re: jcc]
#2292585
04/23/17 10:12 AM
04/23/17 10:12 AM
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Joined: Sep 2003
Posts: 19,456
north of coder
moparx
"Butt Crack Bob"
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"Butt Crack Bob"
Joined: Sep 2003
Posts: 19,456
north of coder
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Shocks see more vertical load when they are angled. A 30 degree shock will see approximately 15% more load (and need to be 15% stiffer) to act the same way as vertical shock. The further the angle, you're trading vertical stability vs. side to side
My thinking is they actually see less load, and they need to be stiffer to effect the smaller load they are seeing at a steeper angle ,to exert the same final amount of overall control? according to AFCO, [example] "a 200#/inch spring mounted at a 20* angle gives a 176#/inch rate when figured for ride rate [200x.88]". it goes on to give the multipliers for different mounting angles. mount angle : 0*, 10*, 15*, 20*, 25*, 30* rate multiplier : 0, .97, .93, .88, .82, .75 this is for coilover springs, but i would think it should apply to regular shocks as well. 
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