Team Chevelle banner
1 - 18 of 18 Posts

·
Premium Member
Joined
·
706 Posts
Discussion Starter · #1 ·
I just finished adjusting my pinion angle. Before the adjustment the rear end was pointing towards the ground. Now it is at an equal an opposite angle as the tranny yoke. Problem is the adjustment caused my rear ride height to drop a couple of inches. I personally do not like the factory look with the tires inside the wheel wells and I have no desire to use air shocks.

I was wondering what the impact would be if I swap out the rear springs with ones made for a '66 wagon. Will it raise the ride height or will they just be stiffer?
 

·
Registered
Joined
·
18,906 Posts
how did changing the pinion angle affect the ride height? it is still sitting on the same springs.
it will raise it some, and make your pinion angle go all wonky again.
how much it raises it depends on what springs you've got in there now.
 

·
Premium Member
Joined
·
7,984 Posts
It will raise it. That's an old school trick. I installed wagon springs in my 68 LeMans years ago. It raised it about 2" over stock.
 

·
Registered
Joined
·
707 Posts
2inches sounds about right. I put 3inch chevelle drop springs in my elko and it dropped it 5inches :eek: I did not know at the time there was such a difference from the normal chevelle springs. I put airbags in the springs and now can adjust the ride height about 4inches to where ever I want. Gives a nice street ride, but has too much give for dragracing.
 

·
Premium Member
Joined
·
706 Posts
Discussion Starter · #6 ·
how did changing the pinion angle affect the ride height? it is still sitting on the same springs.
it will raise it some, and make your pinion angle go all wonky again.
how much it raises it depends on what springs you've got in there now.
I have adjustable upper control arms. I had to make them longer to rotate the rear end upwards. When I did that I had a noticable change in the rear ride height. I wasn't expecting that to happen but it did.
 

·
Premium Member
Joined
·
706 Posts
Discussion Starter · #7 ·
It will raise it. That's an old school trick. I installed wagon springs in my 68 LeMans years ago. It raised it about 2" over stock.
Thanks for the info. My next question will be what to do about shocks. I bought 4 brand new Edelbrock IAS shocks and installed them in the car. The rears just fit and were almost fully extended with the car sitting. With the wagon springs the shocks won't work. I assume I can call Edelbrock and give them a measurement for length and they should be able to give me a shock that will work?
 

·
Registered
Joined
·
365 Posts
Spring height always is somewhat of a crapshoot. You could go with circle track springs and spring height adjusters in the rear and fine tune the height to what you want. Lots of people, including myself, are doing this. More spring rates to choose from too.
 

·
Premium Member
Joined
·
706 Posts
Discussion Starter · #9 ·
Spring height always is somewhat of a crapshoot. You could go with circle track springs and spring height adjusters in the rear and fine tune the height to what you want. Lots of people, including myself, are doing this. More spring rates to choose from too.
I would be interested in more info on this...sounds pretty interesting. Where can I go to look for them?
 

·
Administrator
Joined
·
17,210 Posts
Sounds like you've tilted/twisted the rear so far out of position that the springs are now tilted excessively and the shocks woun't fit as they can't bend around the housing.
Put your upper/lower bar's back to the length of the factory bars and your geometry problems will cure themselves.
 

·
Registered
Joined
·
18,906 Posts
Sounds like you've tilted/twisted the rear so far out of position that the springs are now tilted excessively and the shocks woun't fit as they can't bend around the housing.
Put your upper/lower bar's back to the length of the factory bars and your geometry problems will cure themselves.
but that would mean that those expensive aftermarket bars were a waste of money for this particular application and that the engineers at GM might have actually known what the hell they were doing 40 years ago.

i'm still trying to wrap my head around how adjusting the upper bars causes the ride height of the car to drop 2"- the springs are still sitting on top of the axle in the same locations- unless it throws some wicked bind into the equation or something like that. anyone else ever have that happen from a pinion angle change on a stock 4 link setup?
 

·
Administrator
Joined
·
17,210 Posts
that the engineers at GM might have actually known what the hell they were doing 40 years ago.
UM,Yeah ,people are changing driveline angles and thinking their changing pinion angle.
It's called pinion angle for a reason -it's not really pinion to driveshaft to trans angle.
Yeah,some sites include all of the above and it just causes issues as posted here.
And the adjustable bars do serve a purpose ,not sure they were necessary here.

pinion angle change on a stock 4 link setup
How do you change the pinion angle on a "stock 4 link setup" ??
 

·
Registered
Joined
·
365 Posts
A lot of us run the circle track springs from Speedway Motors.Here is the kind of rear adjuster...
Here is one link talking about them...
http://www.chevelles.com/forums/showthread.php?t=238010&highlight=speedway+springs+adjusters+sizing..
Here is a link to the rear adjusters
http://www.speedwaymotors.com/Adjustable-Spring-Shims,3389.html
And these are some of the ones you can run in the rear. Nice thing is you get to pick your spring rate...
Tons more in the forums about these, hope this gets you started..
 

·
Registered
Joined
·
18,906 Posts
UM,Yeah ,people are changing driveline angles and thinking their changing pinion angle.
It's called pinion angle for a reason -it's not really pinion to driveshaft to trans angle.
Yeah,some sites include all of the above and it just causes issues as posted here.
And the adjustable bars do serve a purpose ,not sure they were necessary here.


How do you change the pinion angle on a "stock 4 link setup" ??
thanks for leaving off the first part of what i typed- where i said this:
me a few posts ago said:
but that would mean that those expensive aftermarket bars were a waste of money for this particular application
and you know what i meant by "stock 4 link setup"- a suspension that uses the stock 4 link mounting points. people do all sorts of stuff and claim to have a "stock" suspension- tubular control arms front and rear, different springs, air bags, aftermarket sway bars, etc.
i understand the need for some people to change the pinion angle- but how does changing the length of the top links affect the ride height by 2", when the same spring is in the same perches? is there some sort of a binding going on that pulls the rear axle towards the frame at a certain point, thus totally killing off any potential benefits from a few hundred dollars of aftermarket control arms? is it a shock mounting issue? is it something specific to this particular car?
 

·
Premium Member
Joined
·
706 Posts
Discussion Starter · #15 ·
I went with the adjustable arms to give some flexibility. My goal for my car was a happy medium of stock looks with some suspension upgrades. I also have future plans for a tranny swap. My car had several things wrong wit before I started my resto. The drive shaft was too long so the previous owner cut the yoke down to nothing to make it fit. I am basically starting from scratch to make my drive train correct.
 

·
Registered
Joined
·
1,582 Posts
On my 67 elcamino and my 68 malibu 2 door i went with
moog cargo coils. On the 68 i have monroe sensa-trac shocks and the 67 elcamino has monre coil-over shocks.. Per only direct replacement for air shocks by book at the time. Both working very well and have nice ride heights
good luck jay
 
1 - 18 of 18 Posts
Top