Sway Bar Selection & Size - ZR-1 Net Registry Forums

msorenso · 03-09-2017

Does anyone know the size of the front and rear sway bar on a 91 ZR1?
Also has anyone changed out and to what brand and size with what results? Thank you

RussMcB · 03-10-2017

This will get you started. It lists the sizes that came on C4 Corvettes.

http://www.netmotive.net/articles/hib/c4/sustunch.pdf

msorenso · 03-13-2017

Thank you for the response.. Please if anyone has used aftermarket swat bar please fill me in

5ABI VT · 03-14-2017

I searched and found a solid 32mm bar that was gm and used it. I think it was from this forum but late c4s I believe are interchangeable. Noticeable difference for me. Always on my first mods-list. makes the front end much flatter and sharper feeling.

G8nightman · 03-14-2017

Quote:

Originally Posted by 5ABI VT

I searched and found a solid 32mm bar that was gm and used it. I think it was from this forum but late c4s I believe are interchangeable. Noticeable difference for me. Always on my first mods-list. makes the front end much flatter and sharper feeling.

You left the stock bar in the rear?

Sent from my iPhone using ZR-1 Net Registry

RussMcB · 03-14-2017

When I bought my Z I assumed I'd want to stiffen the ARB's and maybe springs, but after 2 years and 5-6 track days, I'm very happy with how it handles. It's neutral and predictable at the limit. The sway isn't noticeable enough to hurt the performance (on my scale). A blast!

The only updates/maintenance I did was new shocks, lowering bolts in the rear, new tires and a very good alignment.

I'm sure it's different for others, a personal preference.

5ABI VT · 03-14-2017

Quote:

Originally Posted by G8nightman

You left the stock bar in the rear?

Sent from my iPhone using ZR-1 Net Registry

Yes if I remember right the z has the 26mm solid bar in the back because of the wider tires and wheels. On my lt1 car I put the 26mm because I run 11s but it seemed a little form and only helped slide the rear around so I figure 26mm is plenty for the z

Hib Halverson · 03-14-2017

GM never made a 32-mm front bar for a C4.

Even if it did make a 32, just bolting that one with no other changes, might make the front end..."much flatter and sharper feeling," but the overall effect on handing at the limit would be decidely negative because, going up 2-mm in the front, would increase, not decrease, understeer so you'd go into turns with the front end leaning less but also the car would be going slower.

My guess is your "32-mm front bar", if it's from GM is really just a stock 30-mm bar.

5ABI VT · 03-15-2017

I thought I recalled the biggest gm bar being 32 but looks like 30 is the one. hmm.. I cant even remember what size mine is. Theres a lot of variables that come into play to determine wether or not a car would be slower or faster including driver preference. Much flatter and sharper is worth it for me. If I cared about actual numbers than I would be in a c5z or a different car.

03-09-2017	#1
msorenso Join Date: Apr 2013 Location: South Dakota Posts: 85	Sway Bar Selection & Size Does anyone know the size of the front and rear sway bar on a 91 ZR1? Also has anyone changed out and to what brand and size with what results? Thank you

03-10-2017	#2
RussMcB Join Date: Jan 2015 Location: Marietta, GA USA Posts: 1,160	Re: Sway Bar Selection & Size This will get you started. It lists the sizes that came on C4 Corvettes. http://www.netmotive.net/articles/hib/c4/sustunch.pdf

03-13-2017	#3
msorenso Join Date: Apr 2013 Location: South Dakota Posts: 85	Re: Sway Bar Selection & Size Thank you for the response.. Please if anyone has used aftermarket swat bar please fill me in

03-14-2017	#4
5ABI VT Join Date: Jun 2013 Location: Toronto Posts: 782	Re: Sway Bar Selection & Size I searched and found a solid 32mm bar that was gm and used it. I think it was from this forum but late c4s I believe are interchangeable. Noticeable difference for me. Always on my first mods-list. makes the front end much flatter and sharper feeling.

03-14-2017	#6
RussMcB Join Date: Jan 2015 Location: Marietta, GA USA Posts: 1,160	Re: Sway Bar Selection & Size When I bought my Z I assumed I'd want to stiffen the ARB's and maybe springs, but after 2 years and 5-6 track days, I'm very happy with how it handles. It's neutral and predictable at the limit. The sway isn't noticeable enough to hurt the performance (on my scale). A blast! The only updates/maintenance I did was new shocks, lowering bolts in the rear, new tires and a very good alignment. I'm sure it's different for others, a personal preference.

03-14-2017	#8
Hib Halverson Join Date: Jun 2005 Location: CenCoast California Posts: 899	Re: Sway Bar Selection & Size GM never made a 32-mm front bar for a C4. Even if it did make a 32, just bolting that one with no other changes, might make the front end..."much flatter and sharper feeling," but the overall effect on handing at the limit would be decidely negative because, going up 2-mm in the front, would increase, not decrease, understeer so you'd go into turns with the front end leaning less but also the car would be going slower. My guess is your "32-mm front bar", if it's from GM is really just a stock 30-mm bar. __________________ Hib Halverson Technical Writer former owner 95 VIN 0140 current owner 19 VIN 1878

03-15-2017	#9
5ABI VT Join Date: Jun 2013 Location: Toronto Posts: 782	Re: Sway Bar Selection & Size I thought I recalled the biggest gm bar being 32 but looks like 30 is the one. hmm.. I cant even remember what size mine is. Theres a lot of variables that come into play to determine wether or not a car would be slower or faster including driver preference. Much flatter and sharper is worth it for me. If I cared about actual numbers than I would be in a c5z or a different car.