Coordinates of trailing arm suspension parts
 

Hello there,

my second post here goes right into the details.
I am building a 1985 Dodge D150 (hear me out) into a race truck. Autocross, track days and road racing is the focus.

Now what has that to do with Chevy?
I want to put the trailing arm suspension of the 60-72 trucks (i know there is differences and they split 66/67) under my Dodge to get a good suspension system under its tail.
Leaf springs are not what i would want to use with a 650hp (ultimately, starting with 485) truck.

I have read of a lot of advantages (defined instant center, tuneable roll center, coil springs, rear steer, no axle hop, no spring wrap, etc.) over a leaf system.
But what i was not able to read about are dimensions.

I have a set of arms and i need to build a crossmember for them because the Dodges frame is wider than the Chevies, i made an overlay of a C10 frame and a D150 frame that makes that a bit more visual:

https://thedodgetruckblog.files.word...me-overlay.jpg

I have a few questions about measurements i would like to ask and it would be extremely helpful if one could help me out.

Thanks.


Let's start:

In this picture of a stock crossmember there's three different colored arrows to show which measurements i would need.
I figured a picture is easier than a lengthy passage.

https://thedodgetruckblog.files.word...ows.jpg?w=1000

And i would need the center to center measurement from that arrow so i can space the axle pads correctly:

https://thedodgetruckblog.files.word...inch-rear1.jpg


I work with pictures a lot, there is a lot of info in them.
I don't always know whether the info is correct.

From this picture i obtained angles for the trailing arms using a 2d CAD program (LibreCad).

https://thedodgetruckblog.files.word...pse4c7bff1.jpg

The angles obtained are:
- 16.5 degree from centerline
- 33 degree between the arms

Could anybody please confirm or correct these?


Thanks a lot!
Alex


P.S.:
Some of these pics might be courtesy of users of this site, i don't remember because i just right click and save everything i find useful for this build.
If you own this pic and don't want to see it here, drop me a line.

Re: Coordinates of trailing arm suspension parts
 

Aaaand i just found i posted this thread in the somewhat wrong spot :dohh:
I guess it needs moving to the pickup truck section.

Re: Coordinates of trailing arm suspension parts
 

It needs to be moved to suspension or alternate tinkering. Its an interesting thread because you are using Chevy stuff, but you are not building a Chevy truck. So I have no idea where the best place will be. Ive contacted the board mods for you.

Re: Coordinates of trailing arm suspension parts
 

Thank you!