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Suspension / Chassis Questions about your suspension? Need chassis advice?

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Old 07-08-2009, 08:38 PM   #1
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Car: 1991 Z28 Convertible
Engine: 350 TPI
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Custom front subframe brace

I just happen to run across a picture of this in Camaro Performers, Jun 09, pg 9:

Anyone have anything like this or seen anyone manufacture one? I have never seen a brace like this for our cars. I think bmr makes a similar (?) front end "k-member" brace for mustangs.
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File Type: jpg bluebrace.jpg (77.7 KB, 113 views)
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Suspension Eiback prokit springs, boxed-in stock LCA's with poly bushings, Lakewood panhard rod, boxed panhard bar brace, WS6 36mm front sway bar and 32mm rear sway bar, Koni reds, BMR tubular non-adj torque arm.
ChassisCustom b-pillar brace, custom front subframe reinforcement, custom STB, MAC sfc's, Wonderbar.
Interior 4th gen leather seats, in-dash fan control switch.
Engine Reman/ rebuilt 350, Moroso 8mm spiral core wires, homemade CAI, Edelbrock aluminum H2O pump, K&N air filters.
Exhaust hi-flo cat, Flowmaster cat back exhaust, custom exhaust tips,
Drivetrain rebuilt 3.23 rear with gov-loc posi, HD transmission servo.
Brakes LS1 front brakes.

Jesus built my hotrod: "Where you are doesn't matter unless you can get away from it."
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Old 07-08-2009, 09:17 PM   #2
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Re: Custom front subframe brace

it must be a custom made piece, i've never seen one. Cool idea though
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Old 07-08-2009, 09:37 PM   #3
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Re: Custom front subframe brace

its a nice peice. looks like a new style of Sub frame connector and its a custom tranny crossmember built in. u can see how it attached as 3 points, front subframe, tranny crossmember bolts and runs back to the rear subframe. the cross point infront of the trans is a nice touch or added rigidy and it unbolts for easy removal. still its a tight fit around the trans so the entire SFC would have to be unbolted to remove the engine and trans.

its def custom, nice work tho
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Old 07-08-2009, 10:00 PM   #4
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Re: Custom front subframe brace

Its a lateral brace designed for spanning the rear A-arm ears from closing together under subframe flex exerted from the a-arms in hard cornering.

Its alot like the brace I had on my car, only much heavier and incubersome to work around. It is in fact designed to try and be an entire subframe connector unit all in one. This brace however runs up the sides of the trans right under the already strong front unibody structure for and aft. only the lateral (side to side) brace is needed...... overkill and excessive weight in my opinion.

i have old pics of it on my old cardomain site. You will have to click on the link and page down 5 pictures. Its an aluminum peice spanning the frame rails just in front of the trans pan. I welded attachment tabs to the subframes on each site so I could unbolt it and I used an aluminum tierod with rodends so I could adjust the length as well as preload it.
http://www.cardomain.com/ride/518752/2

Dean

Last edited by Vetruck; 07-08-2009 at 10:07 PM.
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Old 07-09-2009, 08:47 AM   #5
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Re: Custom front subframe brace

looks like alot of work to be put into a car that they still have the exhaust Td together on
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Old 07-09-2009, 09:45 AM   #6
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Re: Custom front subframe brace

Dean, I remember seeing that brace on your car in the past. Didnt you used to be "vsixtoy" on here?

How did that brace work out for you btw?

There is another picture in the article of the rearward portion of the bracing. I'll post it when I get home today.

Evidently, all the work was done in British Columbia.
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Old 07-09-2009, 11:11 AM   #7
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Re: Custom front subframe brace

Quote:
Originally Posted by Matthew91-Z28 View Post
Dean, I remember seeing that brace on your car in the past. Didnt you used to be "vsixtoy" on here?

How did that brace work out for you btw?

There is another picture in the article of the rearward portion of the bracing. I'll post it when I get home today.

Evidently, all the work was done in British Columbia.
Agood2.8, RTFC, Vsixtoy, Afrikingoodtime,.......all kinds of names. An old moderator had it in for me and kept banning me years ago.

The brace work great. Ny car as you probably remember had no weak links ibn the suspension....meaning that flex or failure would not transfer into multiple worn bushings where this would go unnoticed otherwise. I could feel the removal of any one of my 4 front lateral braces. They all helped in steering response and perciseness in controling the vehicle.
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Old 07-09-2009, 09:20 PM   #8
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Join Date: May 2002
Location: Texas
Posts: 1,316
Car: 1991 Z28 Convertible
Engine: 350 TPI
Transmission: 700R4
Axle/Gears: 3.23 with 28 spline axles and gov-l

Classifieds Rating: (0)
Re: Custom front subframe brace

I remember you kept getting banned for being too argumentative or something


As a convertible owner I am always looking for ways to tighten up the chassis (see my sig);

I am still contemplating a custom cross-brace (x-shaped) to connect the mid chassis area to the end of the front subframes. The 1st gen verts had one, as well as the 4th gen. I know there are some differences in the chassis structure from year to year, but the concept still seems pretty solid.

I have mac sfc's and they helped alot but I still feel more twist/flex than i am happy with at times. I could just rip em out and try the spohn set.....but I'm not sure. I keep going back to the though "well they had x-braces on 1st and 4th gen verts. Why cant I make one for myself?"
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Suspension Eiback prokit springs, boxed-in stock LCA's with poly bushings, Lakewood panhard rod, boxed panhard bar brace, WS6 36mm front sway bar and 32mm rear sway bar, Koni reds, BMR tubular non-adj torque arm.
ChassisCustom b-pillar brace, custom front subframe reinforcement, custom STB, MAC sfc's, Wonderbar.
Interior 4th gen leather seats, in-dash fan control switch.
Engine Reman/ rebuilt 350, Moroso 8mm spiral core wires, homemade CAI, Edelbrock aluminum H2O pump, K&N air filters.
Exhaust hi-flo cat, Flowmaster cat back exhaust, custom exhaust tips,
Drivetrain rebuilt 3.23 rear with gov-loc posi, HD transmission servo.
Brakes LS1 front brakes.

Jesus built my hotrod: "Where you are doesn't matter unless you can get away from it."
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Old 07-09-2009, 09:20 PM
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