independent rear suspension

hardtime72 · 02-24-2005

I am looking for any information on modifications to help me. I would like to place an independent rear supension in my 69 Opel GT. I don't know whick donor cars would be the best fit and I would like the specifications needed. unequal length non parallel link double wishbone is what I'm looking for but I will settle for parallel with a quaiffe atb differential gear upgrade.

RallyBob · 02-24-2005

Originally Posted by hardtime72

I am looking for any information on modifications to help me. I would like to place an independent rear supension in my 69 Opel GT. I don't know whick donor cars would be the best fit and I would like the specifications needed. unequal length non parallel link double wishbone is what I'm looking for but I will settle for parallel with a quaiffe atb differential gear upgrade.

If you search the forums, you'll find this has been talked about at length, but offhand I can only think of one person who has posted the results of his successful IRS swap to a GT. I believe that was a BMW IRS. I think a Miata IRS might be a good candidate, but as that car is substantially wider it won't be a swap without consequences (front drive offset wheels and/or flared fenders may be necessary). They were available with a Torsen style differential as an option too BTW.

Bob

GoinManta · 02-24-2005

The Isuzu Impulse Complete rear has been swapped into a GT and Manta. ON 88 and 89 models it had IRS. So it was the candidate I was considering. Not to mention the forementioned BMW.

Charles

kwilford · 02-24-2005

Moved to the " Performance Suspension and Braking Upgrades " Forum

Gary · 02-24-2005

Originally Posted by GoinManta

The Isuzu Impulse Complete rear has been swapped into a GT and Manta. ON 88 and 89 models it had IRS. So it was the candidate I was considering. Not to mention the forementioned BMW.

Charles

Charles - Do you still have the rear end from your Bitter Parts car? What about the 3.9?

GoinManta · 02-25-2005

Steven (OldOpelGuy) just got the Bitter 3.9L To rebuild for his Admiral.

The Bitter parts car (with its rear end) went to a Bitter owner in Pennyslvania.

The rear independant on the Bitter I think would be too large and bulky for either the Manta or GT

hardtime72 · 02-26-2005

I am seriously considering building a frame that will allow me to use my opel's differential housing and make an IRS I will keep everyone up to speed on the design process. Sounds difficult but I believe it is feasible. If it works I will make it possible for everyone to have access to the design when it is completed.

jeff denton · 02-26-2005

Just find the posts about it being done already. It was just a few months ago, was pretty interesting.

jtb · 02-26-2005

Hi,

Info on the BMW swap is here http://www.opelgt.com/forums/showthr...t=bmw+irs+swap

I thought about using the Miata, but was unable to find one!. If you are thinking about making a subframe, maybe consider shorteneing the miata (maybe they are more readily available in the States) as it is already in its own subframe.

Cheers,

JTB

02-24-2005	#1 (permalink)
hardtime72 Opeler Join Date: Feb 2005 Location: central Oklahoma Posts: 21	Unanswered: independent rear suspension I am looking for any information on modifications to help me. I would like to place an independent rear supension in my 69 Opel GT. I don't know whick donor cars would be the best fit and I would like the specifications needed. unequal length non parallel link double wishbone is what I'm looking for but I will settle for parallel with a quaiffe atb differential gear upgrade.

02-24-2005	#3 (permalink)
GoinManta Opelitis since 1984 Join Date: Mar 2002 Location: Midlothian, VA Posts: 2,213 Real Name: Charles Goin Provided Answers: 3	The Isuzu Impulse Complete rear has been swapped into a GT and Manta. ON 88 and 89 models it had IRS. So it was the candidate I was considering. Not to mention the forementioned BMW. Charles __________________ CURRENT '06 Pontiac GTO '71 Opel Kadett 4 Door 36D (w/ Opel Parts & Service 2.0L) '74 Opel Manta (Bens Manta) '74 Opel Manta (w/ LK5 transplant) Past '73 Opel Manta (Blue Max) '75 Opel Manta (Yellow) '85 Bitter SC '73 Opel Commodore B GS '73 Opel GT (w/ Vinyl Roof) At least 16 or So Parts Opels

02-24-2005	#4 (permalink)
kwilford Über OpelGT.com Moderator Join Date: Mar 2002 Location: Calgary, Alberta, Canada Posts: 4,087 Real Name: Keith Wilford Provided Answers: 4	Moved to the " Performance Suspension and Braking Upgrades " Forum __________________ Keith Wilford working on my '71 GT and '75 SportWagon

02-25-2005	#6 (permalink)
GoinManta Opelitis since 1984 Join Date: Mar 2002 Location: Midlothian, VA Posts: 2,213 Real Name: Charles Goin Provided Answers: 3	Steven (OldOpelGuy) just got the Bitter 3.9L To rebuild for his Admiral. The Bitter parts car (with its rear end) went to a Bitter owner in Pennyslvania. The rear independant on the Bitter I think would be too large and bulky for either the Manta or GT __________________ CURRENT '06 Pontiac GTO '71 Opel Kadett 4 Door 36D (w/ Opel Parts & Service 2.0L) '74 Opel Manta (Bens Manta) '74 Opel Manta (w/ LK5 transplant) Past '73 Opel Manta (Blue Max) '75 Opel Manta (Yellow) '85 Bitter SC '73 Opel Commodore B GS '73 Opel GT (w/ Vinyl Roof) At least 16 or So Parts Opels

02-26-2005	#7 (permalink)
hardtime72 Opeler Join Date: Feb 2005 Location: central Oklahoma Posts: 21	new idea I am seriously considering building a frame that will allow me to use my opel's differential housing and make an IRS I will keep everyone up to speed on the design process. Sounds difficult but I believe it is feasible. If it works I will make it possible for everyone to have access to the design when it is completed.

02-26-2005	#8 (permalink)
jeff denton former opel racer Join Date: Nov 2002 Location: near some glaciers Posts: 2,863 Real Name: Jeff "Oh-Oh" Denton Provided Answers: 4	Just find the posts about it being done already. It was just a few months ago, was pretty interesting. __________________ No Opels were harmed in the filming of this movie. However two Mustangs, a Pinto, and a Capri were hospitalized. One Mustang was euthanized the next morning.

02-26-2005	#9 (permalink)
jtb Member Join Date: Oct 2004 Location: Vancouver Canada Posts: 415	That was me Hi, Info on the BMW swap is here http://www.opelgt.com/forums/showthr...t=bmw+irs+swap I thought about using the Miata, but was unable to find one!. If you are thinking about making a subframe, maybe consider shorteneing the miata (maybe they are more readily available in the States) as it is already in its own subframe. Cheers, JTB

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