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Username Post: G20 van performance suspsension WITH LOAD?!        (Topic#348740)
Phishman88 
Forum Newbie
Posts: 3

Reg: 08-22-17
12-17-17 07:26 AM - Post#2718244    

Hey all,

I've read through many posts here and elsewhere and haven't seen a clear answer. I am looking to lower my g2500 ("3/4 ton") Vandura for better handling but am looking to retain good stability when carrying a load - usually in the rear and occasipnally on the roof with ladder racks. Most drops ive read up are more for cosmetics than performance. This may very well go hand in hand but I have not seen anything to indicate that.

Ideal feel - I want the van to feel more planted/flat without too harsh a ride but also be able to carry 1k ish (band gear or roof top camper + interior cargo) without riding horribly. Despite replacing shocks and bushings its floaty as hell. For reference - when loaded down with gear (tires visually 2-3 inches lower in rear) it actually feels much better...

From what ive gathered I'm looking at 2-2.5 drop C20 truck spindles in front. Rear is a bigger mystery. Assuming I either find a shackle combo (have seen flipped axle + 4 inch lift shackles suggested for 2" ish drop) or can modify my existing to sit lower, anyone have recommendations for leaf springs? Add a "helper leaf", get stiffer ones or just leave alone?

Also looks like several options for aftermarket shocks and springs up front. Open to suggestions/opinions there too.

Can anyone with similar builds (more go than show) chime in?

Yes, I realize "performance" and 3/4 ton van don't go together. But I am looking for more safety, confidence and fun on road trips, not setting lap records!

Also only interested in traditional suspension, not air ride etc. The van is a highway cruiser and I have a truck for rough country camping trips

Thanks!!



Edited by Phishman88 on 12-17-17 07:28 AM. Reason for edit: No reason given.

 
Keith Seymore 
Silver Supporting Member
Posts: 677
Keith Seymore
Loc: Southeast Michigan
Reg: 09-17-08
12-17-17 05:49 PM - Post#2718298    
    In response to Phishman88

  • Phishman88 Said:
Hey all,

I've read through many posts here and elsewhere and haven't seen a clear answer. I am looking to lower my g2500 ("3/4 ton") Vandura for better handling but am looking to retain good stability when carrying a load - usually in the rear and occasipnally on the roof with ladder racks. Most drops ive read up are more for cosmetics than performance. This may very well go hand in hand but I have not seen anything to indicate that.

Ideal feel - I want the van to feel more planted/flat without too harsh a ride but also be able to carry 1k ish (band gear or roof top camper + interior cargo) without riding horribly. Despite replacing shocks and bushings its floaty as hell. For reference - when loaded down with gear (tires visually 2-3 inches lower in rear) it actually feels much better...

From what ive gathered I'm looking at 2-2.5 drop C20 truck spindles in front. Rear is a bigger mystery. Assuming I either find a shackle combo (have seen flipped axle + 4 inch lift shackles suggested for 2" ish drop) or can modify my existing to sit lower, anyone have recommendations for leaf springs? Add a "helper leaf", get stiffer ones or just leave alone?

Also looks like several options for aftermarket shocks and springs up front. Open to suggestions/opinions there too.

Can anyone with similar builds (more go than show) chime in?

Yes, I realize "performance" and 3/4 ton van don't go together. But I am looking for more safety, confidence and fun on road trips, not setting lap records!

Also only interested in traditional suspension, not air ride etc. The van is a highway cruiser and I have a truck for rough country camping trips

Thanks!!



Careful!

A G20 van is not the same as a C20 3/4 ton pickup and the parts will not cross reference.

The G20 has the 5 lug wheels and rotors, more like a C10 1/2 ton pickup.

A G30 van is more like a 3/4 ton pickup, with 8 lug wheels and axles.

K



Chevelle Intro: http://www.popularhotrodding.com/features/1005phr_...
My Pontiacs: http://forums.maxperformanceinc.com/forums/showthr...
Pickup: http://67-72chevytrucks.com/vboard/showthread.php?...


Edited by Keith Seymore on 12-17-17 05:56 PM. Reason for edit: No reason given.

 
Keith Seymore 
Silver Supporting Member
Posts: 677
Keith Seymore
Loc: Southeast Michigan
Reg: 09-17-08
12-17-17 05:55 PM - Post#2718299    
    In response to Keith Seymore

For a 2 or 2.5" drop I would recommend you just cut the existing front coil springs. Due to the suspension geometry 1" off the spring will result in a 2" drop. It's free other than having to have the front end aligned when you are done.

I have always relocated the leaf spring hangers on the rear on pickups. That is likely not an option on a van. You may have to provide clearance for a longer shackle or play with shape and number of leaves in the spring pack.

K


Chevelle Intro: http://www.popularhotrodding.com/features/1005phr_...
My Pontiacs: http://forums.maxperformanceinc.com/forums/showthr...
Pickup: http://67-72chevytrucks.com/vboard/showthread.php?...


 
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