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09-17-2025, 05:54 PM
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#1 |
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Registered User
Join Date: Oct 2013
Location: Shelbyville, IL
Posts: 128
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Dropped shocks
Can someone explain to me if a stock shock has a collapsed dimension of 10 inches, how can an advertised lowered shock for a 3 to 4 inch drop have a collapsed dimension of 9 inches and not bottom out?
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1948 Chevy 1/2T 1964 Chevy 1/2T stepside short bed 1939 Pontiac coupe Street Rod 2005 GMC 1/2T short bed |
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09-17-2025, 11:21 PM
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#2 |
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Registered User
Join Date: Feb 2012
Location: Beautiful BC, Canada, eh?!
Posts: 2,389
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Re: Dropped shocks
The shock is on a different motion ratio than the spring, which is on a different motion ratio than the wheel.
Typically, on this suspension, a 3" drop at the wheel is actually 1.5" at the spring, and probably (but I have not measured) 1" at the shock.
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1961 Apache: "Grabber Orange" Shortboxed, pancake, step-notch, air-ride, turbo, LS 1977 Silverado: Shortboxed & dropped, potato-potato V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag Lotus Super 7 Replica: Scratch-built street-legal rollerskate |
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09-18-2025, 05:42 PM
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#3 |
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Join Date: Oct 2013
Location: Shelbyville, IL
Posts: 128
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Re: Dropped shocks
Thanks, that makes sense, but some of those dropped shocks have the same collapsed dimension as the stock ones.
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1948 Chevy 1/2T 1964 Chevy 1/2T stepside short bed 1939 Pontiac coupe Street Rod 2005 GMC 1/2T short bed |
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09-18-2025, 08:01 PM
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#4 |
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Join Date: Feb 2012
Location: Beautiful BC, Canada, eh?!
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Re: Dropped shocks
Yes, I've noticed that too. I've seen "drop" shocks that are longer. Some people don't math well.
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1961 Apache: "Grabber Orange" Shortboxed, pancake, step-notch, air-ride, turbo, LS 1977 Silverado: Shortboxed & dropped, potato-potato V8 Pontiac Firefly (Chevy Sprint): The ultimate engine swap: 5.7L in a 1.0L bag Lotus Super 7 Replica: Scratch-built street-legal rollerskate |
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09-19-2025, 02:51 PM
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#5 | ||
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Join Date: Apr 2001
Location: DALLAS,TX
Posts: 22,567
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Re: Dropped shocks
Quote:
Quote:
In the case of a C10 front suspension, I relocate the upper bracket higher to maintain the stock 'mid-travel' height.
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67SWB-B.B.RetroRod 64SWB-Recycle 89CCDually-Driver/Tow Truck 99CCSWB Driver All Fleetsides @rattlecankustoms in IG Building a small, high rpm engine with the perfect bore, stroke and rod ratio is very impressive. It's like a highly skilled Morrocan sword fighter with a Damascus Steel Scimitar..... Cubic inches is like Indiana Jones with a cheap pistol. |
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09-20-2025, 05:09 PM
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#6 |
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Registered User
Join Date: Oct 2013
Location: Shelbyville, IL
Posts: 128
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Re: Dropped shocks
I'm going to find out. I just ordered a set of shocks that are 9 compressed and 13.5 extended for a 3" drop. The rear ones are 12" just like the stock ones. For a 4" drop. We shall see. Advertised for a 2-3 front drop and 4-5 rear drop. Being a retired engineer, I just couldn't resist testing the math.��
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1948 Chevy 1/2T 1964 Chevy 1/2T stepside short bed 1939 Pontiac coupe Street Rod 2005 GMC 1/2T short bed |
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