4 link suspension

Posted by: AZ_A12_BEE

4 link suspension - 05/26/17 12:18 AM

Shopping for a 4 link kit, which is better parallel with pan hard bar or triangulated ? Rubber or urathane bushings? How do you figure out which coil over to use?
Posted by: Mike P

Re: 4 link suspension - 05/26/17 06:18 AM

I suspect you've probably already come across this but I'll throw it out in case you haven't.

http://www.ridetech.com/info/air4link-tech/

For bushings I usually prefer the rubber ones.....but with the power and tires you are going to be running I'd probably seriously consider urethane. Just make sure you get ones that can greased.

On spring rates it's probably going to be best to talk to the manufacture or you could go air bags.

One of the things to consider for the springs will be fuel tank location and size. A 20 gallon fuel tank hung under the bed behind the rear axle will probably require a bit stiffer spring than a 15 gallon tank mounted in the front of the bed.
Posted by: Crizila

Re: 4 link suspension - 05/27/17 09:27 PM

Originally Posted By AZ_A12_BEE
Shopping for a 4 link kit, which is better parallel with pan hard bar or triangulated ? Rubber or urathane bushings? How do you figure out which coil over to use?
Good article Mike P. I went with a triangulated 4 link on my 33. Carrera coil overs. It does help with the room issue. Polly bushings for sure. A ton of adjustability is available. wave
Posted by: AZ_A12_BEE

Re: 4 link suspension - 05/27/17 10:30 PM

Originally Posted By Crizila
Originally Posted By AZ_A12_BEE
Shopping for a 4 link kit, which is better parallel with pan hard bar or triangulated ? Rubber or urathane bushings? How do you figure out which coil over to use?
Good article Mike P. I went with a triangulated 4 link on my 33. Carrera coil overs. It does help with the room issue. Polly bushings for sure. A ton of adjustability is available. wave


Crizila, what brand did you use?
Posted by: Crizila

Re: 4 link suspension - 05/29/17 07:54 PM

Originally Posted By AZ_A12_BEE
Originally Posted By Crizila
Originally Posted By AZ_A12_BEE
Shopping for a 4 link kit, which is better parallel with pan hard bar or triangulated ? Rubber or urathane bushings? How do you figure out which coil over to use?
Good article Mike P. I went with a triangulated 4 link on my 33. Carrera coil overs. It does help with the room issue. Polly bushings for sure. A ton of adjustability is available. wave


Crizila, what brand did you use?
Actually came as part of the frame / suspension package with the 33 body. Left me a nice big opening behind the axle housing ( inside the frame rails ) for a fuel tank. Lots to choose from with Carrera coil-overs.
Posted by: Crizila

Re: 4 link suspension - 10/31/17 03:40 PM

Originally Posted By Crizila
Originally Posted By AZ_A12_BEE
Originally Posted By Crizila
Originally Posted By AZ_A12_BEE
Shopping for a 4 link kit, which is better parallel with pan hard bar or triangulated ? Rubber or urathane bushings? How do you figure out which coil over to use?
Good article Mike P. I went with a triangulated 4 link on my 33. Carrera coil overs. It does help with the room issue. Polly bushings for sure. A ton of adjustability is available. wave


Crizila, what brand did you use?
Actually came as part of the frame / suspension package with the 33 body. Left me a nice big opening behind the axle housing ( inside the frame rails ) for a fuel tank. Lots to choose from with Carrera coil-overs.
Actually, I believe it's a Speedway kit.
Posted by: dogdays

Re: 4 link suspension - 11/06/17 06:14 PM

I hope you can adjust the Instant Center on those rods. The same geometry was used on the GM A-bodies like Chevelles. Those cars had the instant center too far towards the front. The rears would hop under hard acceleration. The cure was to relocate the upper bar attachment to the axle, higher. This shortened up the instant center and voila! no more hops.

R.
Posted by: moparx

Re: 4 link suspension - 11/07/17 07:57 AM

the old lakewood "no hop" bars. i think there may be someone other than lakewood producing those today, but i haven't seen any lakewood brand of those for years.
beer
Posted by: CrAzYMoPaRGuY

Re: 4 link suspension - 11/08/17 10:16 PM

Originally Posted By moparx
the old lakewood "no hop" bars. i think there may be someone other than lakewood producing those today, but i haven't seen any lakewood brand of those for years.
beer


We used those. They took the word "suspension" right out of the rearend......
Posted by: Crizila

Re: 4 link suspension - 11/09/17 08:31 AM

Originally Posted By dogdays
I hope you can adjust the Instant Center on those rods. The same geometry was used on the GM A-bodies like Chevelles. Those cars had the instant center too far towards the front. The rears would hop under hard acceleration. The cure was to relocate the upper bar attachment to the axle, higher. This shortened up the instant center and voila! no more hops.

R.
Yep, I hear you on that. To be honest, I have yet to stomp on it from a dead stop, but it might hop a bunch. As you can see from the pic, room constraints are an issue. Think I would have to go to a conventional 4 link and pan hard rod to fix it.
Posted by: csmopar

Re: 4 link suspension - 11/09/17 02:28 PM

I personally went with the Gerst made parallel watts link kit. pretty neat kit all told.
Posted by: Crizila

Re: 4 link suspension - 11/10/17 06:49 PM

Originally Posted By csmopar
I personally went with the Gerst made parallel watts link kit. pretty neat kit all told.
Could you post a pic?
Posted by: csmopar

Re: 4 link suspension - 11/14/17 11:18 AM

pm me your email and ill send you some. I've not figured out how to post pictures here now that photobucket changed their 3rd party links.
Posted by: Crizila

Re: 4 link suspension - 11/22/17 08:24 PM

Originally Posted By dogdays
I hope you can adjust the Instant Center on those rods. The same geometry was used on the GM A-bodies like Chevelles. Those cars had the instant center too far towards the front. The rears would hop under hard acceleration. The cure was to relocate the upper bar attachment to the axle, higher. This shortened up the instant center and voila! no more hops.

R.
Remember, this is a street rod, not a drag car. There is a difference in application between a 4 bar and a 4 link rear suspension. Mine is a triangulated 4 bar - best suited for street rods / "g" machines. 4 links are best suited for drag /race cars ( much more instant center adjust ability for track conditions).