Fiberglass leaf springs

Greg Gay · 02-06-2020, 02:19 PM

Has anyone tried them? Where did you get them? Did you like them? Are they available with custom arches, or just one arch setting?

Thanks,

Greg

Mark Ugrich · 02-06-2020, 02:53 PM

I had Flex-Form springs under the Mustang until I decided to update the chassis. Took off a bunch of weight. You can have them custom made for your application and spring rate.Overall I liked them. Flex-Form.com

Dave Gantz · 02-06-2020, 10:32 PM

Are they legal for Stock?

Dave Turner · 02-07-2020, 04:28 PM

We used the Flex Form springs for 4 seasons in a 3450 lb Stock Mustang. Replaced them with Calvert product when both sides started to split(delaminate?) between the diff and the rear mount. The manufacturer suspected that we missed the spring rate target when they were ordered.

I didn't notice significant change in track results and expect durability to be superior. It appears that the split monoleaf spring allows greater separation based upon before & after pics.

The fiberglass springs rode smoother on sketchy return roads, I must say that.

Dave Turner · 02-07-2020, 04:32 PM

Quote:

Originally Posted by Dave Gantz

Are they legal for Stock?

"Leaves may be changed(added or subtracted)as long as overall length and mounting points are used."

Dave Gantz · 02-07-2020, 06:02 PM

I was wondering if they had to be steel, as was "stock". But I guess if the Calvert split mono's are legal, why not make 'em fiberglass, too?

I'm from the old school when the "stockers" were a lot more "stock" than they are now. lol

02-06-2020, 02:19 PM	#1
Greg Gay Member Join Date: Aug 2003 Location: Vermont Posts: 385 Likes: 21 Liked 283 Times in 70 Posts	Fiberglass leaf springs Has anyone tried them? Where did you get them? Did you like them? Are they available with custom arches, or just one arch setting? Thanks, Greg

02-06-2020, 02:53 PM	#2
Mark Ugrich Member Join Date: May 2011 Location: Auburndale,Florida Posts: 220 Likes: 29 Liked 71 Times in 38 Posts	Re: Fiberglass leaf springs I had Flex-Form springs under the Mustang until I decided to update the chassis. Took off a bunch of weight. You can have them custom made for your application and spring rate.Overall I liked them. Flex-Form.com

02-06-2020, 10:32 PM	#3
Dave Gantz Senior Member Join Date: Nov 2005 Location: Verrry South Jersey Posts: 537 Likes: 134 Liked 251 Times in 125 Posts	Re: Fiberglass leaf springs Are they legal for Stock?

02-07-2020, 04:28 PM	#4
Dave Turner VIP Member Join Date: Oct 2005 Location: Schomberg, ON, Canada Posts: 1,222 Likes: 1,606 Liked 364 Times in 138 Posts	Re: Fiberglass leaf springs We used the Flex Form springs for 4 seasons in a 3450 lb Stock Mustang. Replaced them with Calvert product when both sides started to split(delaminate?) between the diff and the rear mount. The manufacturer suspected that we missed the spring rate target when they were ordered. I didn't notice significant change in track results and expect durability to be superior. It appears that the split monoleaf spring allows greater separation based upon before & after pics. The fiberglass springs rode smoother on sketchy return roads, I must say that. __________________ Dave Turner SS/GT #1153

02-07-2020, 06:02 PM	#6
Dave Gantz Senior Member Join Date: Nov 2005 Location: Verrry South Jersey Posts: 537 Likes: 134 Liked 251 Times in 125 Posts	Re: Fiberglass leaf springs I was wondering if they had to be steel, as was "stock". But I guess if the Calvert split mono's are legal, why not make 'em fiberglass, too? I'm from the old school when the "stockers" were a lot more "stock" than they are now. lol

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