Difference between convertible and hardtop chassis?
Thread Starter
Senior Member
Joined: Sep 2000
Posts: 560
Likes: 1
From: Austin TX
Car: 91 RS Convertible
Engine: 355
Transmission: 700R4
Axle/Gears: 2.73 peg leg
Difference between convertible and hardtop chassis?
I was just wondering why there are some suspension parts made specifically for convertibles. What are the differences in the chasis, besides the obvious? Will some headers work with the hardtop and not the convertible?
Senior Member
Joined: Mar 2001
Posts: 868
Likes: 0
From: Randleman,NC,USA
Car: 91 Camaro RS Convertible
Engine: 385ci LT1 cnc ported heads big cam
Transmission: 4L60E automatic
Axle/Gears: 3.42 Zexel posi 7.5" rear
Only difference I could see on my Convertible is the 2 steel beams they ran along the rocker for chassis support. My 3" exhaust ran fine not even close to anything.
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91 Camaro RS 5.0L Black Convertible 700R4
** Added so far **
*GM Wonderbar,Alston SFC's,spohn LCA's and Panhard rod
*Turbo City Inj Spacer
*Dual Snorkel Air Filter
*March Performance Pulleys
*GM 3.42 Gears with OEM Zexel POSI
*Edelbrock headers
*3" High Flow Cat
*3" Dynomax Exhaust
*Walbro 255 lph Fuel Pump
***Future 330hp Vortec Crate with LT4 hotcam and 454 TBI
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91 Camaro RS 5.0L Black Convertible 700R4
** Added so far **
*GM Wonderbar,Alston SFC's,spohn LCA's and Panhard rod
*Turbo City Inj Spacer
*Dual Snorkel Air Filter
*March Performance Pulleys
*GM 3.42 Gears with OEM Zexel POSI
*Edelbrock headers
*3" High Flow Cat
*3" Dynomax Exhaust
*Walbro 255 lph Fuel Pump
***Future 330hp Vortec Crate with LT4 hotcam and 454 TBI
Joined: Dec 1999
Posts: 5,964
Likes: 37
From: Hacienda Heights, CA
Car: 90 RS 'Vert, 88 IROC-Z, 88 Firebird
Engine: 305 ci tbi, 305 ci tpi, 350 ci tpi
Transmission: WC-T5, WC-T5, 700R4
Axle/Gears: 3.45, 3.27, 3.27
Convertibles have a formed sheet metal reinforcement riveted just behind the lower ground effects (in fact they have to trim the back side of the gfx to fit them in). This is where MOST brands of SFC's mount. Only two brands will work (so far). Alston's are what I have. They are sold on the Internet either directly from Alston or from Internet Racers Supply (listed as their "Terminator" series). http://www.racenet.net/. Unfortunately they have dropped the thirdgen ones from their online catalog. Call them. A local Member recently ordered a set and found out that Alston is doing a production run for Thirdgen's. The other brand that I hear of working is from Kenny Brown. http://www.kennybrown.com/home.html. PS: I plan to make SFC's for convertibles in the future as well (hence my prior reference to "so far"). My newly formed (and soon to open for business) company is called Top-Down Solutions (626)369-0040. Good luck, Lon. 8^)
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90 RS Convertible
http://www.sc3gfb.org/members/lonsal.html
http://www.taskerinc.com/gs3/profiles/Lon_profile.htm
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90 RS Convertible
http://www.sc3gfb.org/members/lonsal.html
http://www.taskerinc.com/gs3/profiles/Lon_profile.htm
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