Your donations help keep this valuable resource free and growing. Thank you.
|
slapper/ladder bars |
Post Reply | Page 12> |
Author | |
Eddiebell
AMC Apprentice Joined: Jan/11/2020 Location: Cleveland Ohio Status: Offline Points: 152 |
Post Options
Thanks(0)
Posted: Jun/28/2020 at 12:07pm |
Did you get the Caltracs for your car ? I am actually looking for a review on them how they changed the handling of the car on the street and if they make a lot of noise I see a lot of stuff saying how good they are but actual no real reviews of the things. Like do they change your handling and curves. Do they make your car feel like its riding on rails like ladder bars do . Does the Aluminum spacer in the spring actually not deteriorate because of the mixtrue of steel does not play well with it . I actually drive my car to all the car shows with my family in it so I want something that's not bone-jarring ride and slapper bars are too low for me
|
|
cosbysweater
AMC Apprentice Joined: Jul/08/2019 Location: Central Coast Status: Offline Points: 39 |
Post Options
Thanks(0)
|
May just do some caltracs in it
|
|
WesternRed
AMC Addicted Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5808 |
Post Options
Thanks(0)
|
Here is a reasonable article on the subject:
|
|
I've finally given up drinking for good...........now I only drink for evil.
|
|
cosbysweater
AMC Apprentice Joined: Jul/08/2019 Location: Central Coast Status: Offline Points: 39 |
Post Options
Thanks(0)
|
Has anyone on here ever tied the rear end into the trans cross member to reduce axle wrap?
|
|
amcenthusiast
AMC Addicted Joined: Jul/02/2012 Location: SW Atlanta GA Status: Offline Points: 1778 |
Post Options
Thanks(0)
|
...I think this thread might go in 'suspension' category... I also think that 'anti-tramp' (British slang name) or 'override bars' (US name) were first used by OEM on cars that showed need for it -to control wheel hop or prevent excessive leaf spring deflection. As I understand it, one of the nuances of what is not being discussed here is 'pinon angle' which is a sub-topic of 'chassis geometry'. 'Cal-Trac' bars create variable pinion angle with relation to torque loading of the chassis. 'Slapper bars' create pinion angle limitation during torque load reaction by the chassis. AMC 'Torque Links' create pinion angle limitation for both power and brake torque load chassis reactions, some having adjustable slots for 'pinion angle preload' and some were made with no slots. AM's Torque Link traction bar system was preceded by early model leaf spring Chevrolet Corvette, Studebaker Avanti and early Shelby Mustang which also feature a similar 'override traction bar' set up on those cars.* *Torque Link type traction bars tend to be more important for sports car applications because they affect leaf spring deflection under braking as well (axle housing twist motion both ways; acceleration and deceleration) for improved handling. Cal Tracs and slapper bars (generally speaking) only work to control axle twist under acceleration. The angle of the slapper bar with relation to the chassis, is related to what is described as 'instant center' in most drag race chassis tech articles. -the lengths and angles all affect how much leverage is transmitted through the slapper bar. -a 90 degree angle has more force than any other... see Khan Academy 'torque of an angle' https://www.youtube.com/watch?v=ZQnGh-t25tI Moreover, instant center, whether it's higher or lower, moved forward or back, affects how the car moves with relation to it's engineered 'center of gravity'. (this component involves leverage also) As I understand it, Cal-Tracs actually create a 'roving'/variable instant center as the torque load is distributed into the chassis under acceleration. -part of the design: the variable geometry effect is similar to having a moving weight inside the car which reacts in reaction to power input? ...it's all very interesting topic to study; no reason to be bored & plenty to learn -as usual!
Edited by amcenthusiast - Jan/07/2020 at 10:54am |
|
443 XRV8 Gremlin YouTube video: https://www.youtube.com/watch?reload=9&v=2DmFOKRuzUc
XRV8 Race Parts website: http://amcramblermarlin.1colony.com/ |
|
CARnivore
AMC Apprentice Joined: Jan/03/2020 Location: Houston Status: Offline Points: 92 |
Post Options
Thanks(0)
|
The poor mans leaf spring traction setup has always been solid front eye bushings and spring clamps on the front side of the leaves effectively turning them into solid links. I run caltracs on my AMX
|
|
tached_out
AMC Nut Joined: Feb/08/2008 Location: Vancouver, BC Status: Offline Points: 328 |
Post Options
Thanks(1)
|
A good set of slapper bars will get you off the line quickly and consistently. I built mine out of 2 1/2''x1 1/2'' rectangular tube similarly to Western Red's. My car got 1.5 second 60' times. It ran low 11s. A Gremlin uses a bar that measures 23'' from axle centerline to spring eye. This car sat with the top of the tires one inch below the wheel well and the front of the bars pointing downwards. You can see how much they plant the tires in the picture. Glenn Edited by tached_out - Jan/01/2020 at 6:58pm |
|
360x
AMC Apprentice Joined: Aug/17/2019 Location: western pa Status: Offline Points: 35 |
Post Options
Thanks(0)
|
my car is a stripped/gutted car with a seat and gauges similer to yours except its a gremlin(2840# with me in it
90/10 front with v8 springs - sway bar delete -- stock rear springs gonna redo f/r suspension with some new parts and bushings - like the idea of 6cyl. springs got some light weight skinny rims for fronts and aluminum for the rear(had all steel wheels!) i am not unhappy with the slappers for now - i'll see how the car performs this spring and go from there thanks for all the input - GO AMeriCan !
|
|
FuzzFace2
AMC Addicted Joined: Jul/05/2007 Location: Angier, N.C. Status: Offline Points: 10356 |
Post Options
Thanks(0)
|
I know you said you did not think the Cal Trac's were the way to go and I will say you are wrong! I have them on my 70 Javelin drag only car, 360 w/cam, 3000 stall TH400, 4.56 Detroit locker AMC 20, 9" slicks, 13.0 - 13.5 and also ran brackets when I was racing. What is nice is if the track changes the Cals are easy to adjust unlike the slappers you have now. You would need to adjust the rubbers to have a different gap between springs and bumper. Just a little change of the Cals makes a big difference. You did not say what model this is, what you did to the front suspension, or did to make the car lighter being a drag only car? Mine has Gremlin 6cly front springs, 90/10 shocks (gas shocks out back), sway bar removed, battery to trunk, gutted the inside just a race seat & the needed gauges. I may be ugly and not as fast as the others but in brackets you just need to run the numbers. I don't remember the 60' but think it could have been better, the reaction times were great and true from run to run as was the 1320 numbers to run many rounds. Go with the Cal Trac's and don't look back Dave ---- ps: I have slappers on my 70 street Javelin as that's what was on it when I got it and they will stay for the street.
Edited by FuzzFace2 - Nov/28/2019 at 8:02am |
|
TSM = Technical Service Manual
75 Gremlin X v8 for sale 70 Javelin 360/auto drag car 70 Javelin 360/T5 Street car |
|
WesternRed
AMC Addicted Joined: Aug/03/2010 Location: Australia Status: Offline Points: 5808 |
Post Options
Thanks(1)
|
I just made my own out of some 40 mm x 40 mm RHS and a bit of plate. My understanding is that you can adjust the distance between the bush and spring eye to tune your launch.
|
|
I've finally given up drinking for good...........now I only drink for evil.
|
|
Post Reply | Page 12> |
Tweet
|
Forum Jump | Forum Permissions You cannot post new topics in this forum You cannot reply to topics in this forum You cannot delete your posts in this forum You cannot edit your posts in this forum You cannot create polls in this forum You cannot vote in polls in this forum |