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#2459993 - 03/02/18 02:05 PM Rear shock help
wyldebill Offline
super stock

Registered: 01/02/07
Posts: 727
Loc: Midland,Tx
I'm in the building phase of my 68 valiant, and I'm looking at rear shocks. How much travel do I need on a leaf spring car?

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#2460022 - 03/02/18 03:19 PM Re: Rear shock help [Re: wyldebill]
AndyF Online   content
Too Many Posts

Registered: 01/20/03
Posts: 24517
Loc: Oregon
Depends on the springs used. Super Stock springs have a lot of travel so you might need 8 or 10 inches of travel. That is why those cars used to use Imperial stocks back in the day and then guys switched to pickup shocks or Rancho shocks. We would set them up with 2 inches of compression and 6 to 8 inches of drop since those cars would really stand up and go.

If you have Calvert split mono leaf springs then you only need about 6 inches of travel. 2 inches of compression and 4 inches of drop should do it. Or perhaps 1.5 inches of compression and 4.5 of drop if the track is smooth.

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#2460042 - 03/02/18 04:05 PM Re: Rear shock help [Re: wyldebill]
wyldebill Offline
super stock

Registered: 01/02/07
Posts: 727
Loc: Midland,Tx
Thanks, I have a set of Calvert mono's.

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#2460043 - 03/02/18 04:05 PM Re: Rear shock help [Re: wyldebill]
wyldebill Offline
super stock

Registered: 01/02/07
Posts: 727
Loc: Midland,Tx
Thanks, I have a set of Calvert mono's.

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#2460206 - 03/02/18 07:34 PM Re: Rear shock help [Re: wyldebill]
humpty Offline
enthusiast

Registered: 10/17/07
Posts: 382
Loc: Minnesota, USA
Andy's got it right. I ended up with a 9" shock (AFCO 3890 specifically) on my 72 with Calvert split monos stock ride height bends. That left me with nearly 2" of compression at race weight and 2" of extension remaining without the shocks connected and the rear hanging off the ground.

I would take some mesurments before ordering your shocks to be sure.
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#2460485 - 03/03/18 11:13 AM Re: Rear shock help [Re: wyldebill]
AndyF Online   content
Too Many Posts

Registered: 01/20/03
Posts: 24517
Loc: Oregon
I had to make my own shock plates so I could get the lower mount in the correct location. For example, if you want 2 inches of compression and the rest for extension the lower mount needs to be located in the right spot. I couldn't find shock plates that did the trick so I welded up my own.


Attachments
DSC_2133 (Large).JPG

DSC_2135 (Large).JPG

DSC_2137 (Large).JPG




Edited by AndyF (03/03/18 11:15 AM)

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#2460595 - 03/03/18 04:58 PM Re: Rear shock help [Re: wyldebill]
WHITEDART Offline
top fuel

Registered: 10/06/11
Posts: 2398
Loc: bean town ....Ca
Originally Posted By wyldebill
I'm in the building phase of my 68 valiant, and I'm looking at rear shocks. How much travel do I need on a leaf spring car?
what are you looking to do with the car how fast and what tire will this be a power adder
_________________________
In the 8s N/A.with Brett miller W8's
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#2460976 - 03/04/18 02:15 PM Re: Rear shock help [Re: WHITEDART]
hemi-itis Offline
I Live Here

Registered: 12/29/07
Posts: 10700
Loc: Great Neck,LI,new york
Originally Posted By WHITEDART
Originally Posted By wyldebill
I'm in the building phase of my 68 valiant, and I'm looking at rear shocks. How much travel do I need on a leaf spring car?
what are you looking to do with the car how fast and what tire will this be a power adder

No reply kinda sets off a RED flag to me.........and no Pics work
_________________________
HEMI-ITIS has no cure. My condition is fully BLOWN!!!

New best 60ft,, 1.42,1/8, 6.0 @117,, 9.38 @146.75 with 6 lbs boost @3700 lbs

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#2461482 - 03/05/18 11:35 AM Re: Rear shock help [Re: AndyF]
cudadon Offline
top fuel

Registered: 11/24/03
Posts: 2109
Loc: New Lenox IL
Originally Posted By AndyF
I had to make my own shock plates so I could get the lower mount in the correct location. For example, if you want 2 inches of compression and the rest for extension the lower mount needs to be located in the right spot. I couldn't find shock plates that did the trick so I welded up my own.


Nice work Andy.
Don

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