Front suspension help - Team Camaro Tech
Brakes, Suspension & Steering Conversion questions, Steering & Handling

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post #1 of 9 (permalink) Old Jan 3rd, 19, 07:20 AM Thread Starter
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John
 
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Front suspension help

On my 68 327, I installed CPP UCA's and LCA's, along with 3" Hotchkis Coil Springs, along with generic shocks. The problem is that when I hit the slightest bump in the road, she hits hard. Potholes scare the crap out of me. I was going to pull the trigger on Viking dual adjustable coilovers 450lb set, to replace Springs and shocks, roughly $600. So before I do that, I was hoping for some thoughts on purchasing the Viking setup or better alternatives. Maybe I just need to buy better shocks?

I have heard that with tubular UCA/LCA's there is already some lowering built into them? So combined with the 3" drop Hotchkis springs, it's to much for the average shock to compensate for? As of right now, I have stock exhaust manifolds, but plan on going with long tube headers in the future.

Thanks in advance for your thoughts/recommendations.

BH
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post #2 of 9 (permalink) Old Jan 3rd, 19, 07:36 AM
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Re: Front suspension help

A room full of engineers at GM designed your suspension to work (compensate for speed bumps or pot holes over a range of seven inches. That means with the suspension at rest you have three and a half inches of suspension travel to dampen any changes in the road surface. What do you suppose will happen when you take away three inches of the designed three and a half inch of compression travel?

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post #3 of 9 (permalink) Old Jan 3rd, 19, 08:20 AM
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Frank
 
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Re: Front suspension help

Quote:
Originally Posted by BigHog View Post
On my 68 327, I installed CPP UCA's and LCA's, along with 3" Hotchkis Coil Springs, along with generic shocks. The problem is that when I hit the slightest bump in the road, she hits hard. Potholes scare the crap out of me. I was going to pull the trigger on Viking dual adjustable coilovers 450lb set, to replace Springs and shocks, roughly $600. So before I do that, I was hoping for some thoughts on purchasing the Viking setup or better alternatives. Maybe I just need to buy better shocks?

I have heard that with tubular UCA/LCA's there is already some lowering built into them? So combined with the 3" drop Hotchkis springs, it's to much for the average shock to compensate for? As of right now, I have stock exhaust manifolds, but plan on going with long tube headers in the future.

Thanks in advance for your thoughts/recommendations.

BH
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post #4 of 9 (permalink) Old Jan 3rd, 19, 08:49 AM
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Re: Front suspension help

Or taller bump stops, or better yet, skid plate(s)/rails underneath.

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post #5 of 9 (permalink) Old Jan 3rd, 19, 08:51 AM
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Al
 
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Re: Front suspension help

John, Lay underneath the car and have someone carefully cycle the suspension so you
can see what's hitting. You may be bottoming out the shock travel if the car is lowered
a bunch. Might also be it's hitting the bump stops or the suspension is just so stiff it can't
cycle. When you changed the control arms did you tighten the bolts with the car on the
ground so the control arms were at ride height ? I wouldn't buy a thing until you identify
the problem(s).
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post #6 of 9 (permalink) Old Jan 3rd, 19, 09:52 AM
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Re: Front suspension help

i can't speak to other options but i installed the Viking DA coil overs a few years back and couldn't be happier. the difference in ride quality was night and day. you may be able to get away with different shocks with your current set up but as you alluded too earlier, i think your LCA's probably have some drop built in to them and once you coupled that with the 3" drop (very aggressive as far as lowering springs go) you might be out of room.

go with the Viking set up and you'll be happy. best of both worlds on ride quality and ride height adjustability
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post #7 of 9 (permalink) Old Jan 3rd, 19, 10:04 AM
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Don
 
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Re: Front suspension help

As stated above it makes zero sense to throw parts at a problem before you understand the source of the problem....

First thing I would check is how much compression travel is left in the shock at ride height. Then check your LCA bump stops, assuming you have them.

Don
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post #8 of 9 (permalink) Old Jan 3rd, 19, 11:12 AM
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Re: Front suspension help

The CPP Tubulars are designed with a 2” drop. If you also installed 3” drop coil springs you’re talking 5” total drop.

My guess is you’re bottom out the shocks and/or hitting the stops.

You’re Shocks should be approx at center of travel when installed whether using coil springs or coil overs.

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post #9 of 9 (permalink) Old Jan 3rd, 19, 01:00 PM
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Re: Front suspension help

I don't know about your CPP arms, but I was pretty close to the lower stock height bump stops (like posted above) on my 3" Hotchkis drop with Global West arms.

No bottoming issues,my suspension is pretty stiff compared to stock,but thats kinda what I like for my driving,
I also haven't hit a pot hole yet either.

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