1984 Oldsmobile Cutlass Supreme Brougham

g0thiac

G-Body Guru
Sep 6, 2020
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You mean, the 4-pin connector?
Yes please to ECM, a wiring diagram I really have struggled to find sadly 😥😥😥🤷‍♀️
 

78Delta88

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May 23, 2022
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Read back on some of this. The Buick 231 turbo setup was same as used on Pont 301 Turbo TA/Formula. I had an 82 T Type both NA and Turbo, but was one of the ones stolen by past shop partner, so some what familiar with what you have. Plus owned several Turbo TAs.

On the distributor you can get away with going with an earlier unit that has the mechanical and vacuum advance. Without the ccc hooked up the distributor will hunt with erratic acceleration. The distributor is the cam sensor, and the knock sensor adjusts the timing to prevent detonation. With those not working, it is just not going to run right.

On the carb you might want to look at the Holley Q-Jet Replacement. It's 650 CFM and it's much more modifiable. You might have to do some grinding on the plenum to get the secondary linkage to work. The Holley is Mechanical secondary. Plus you want to change front and back pumpers to the 50cc units. Power valve to 10.5 large window style. And port reference the throttle plate.

I have a C3 carb I can send you if you need for parts. Came off a 307 olds.
 
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78Delta88

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May 23, 2022
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Might be going down different path here...

These guys relatively new but this is the unit I am going to try out in the 86 and 91. Engine for the 91 Caprice still at machine shop.

Distributors are shown to maintain a quality spark all through rpm range and has a tunable app you download to phone.

I haven't personally tried them yet, and at 500 USD for a dizzy...??? But if it's a good fire and forget solution switching over from CCC/TBI older units and is tunable... It might be worth it.


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gdouaire

G-Body Guru
Aug 7, 2013
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Québec City, Québec CANADA
Read back on some of this. The Buick 231 turbo setup was same as used on Pont 301 Turbo TA/Formula. I had an 82 T Type both NA and Turbo, but was one of the ones stolen by past shop partner, so some what familiar with what you have. Plus owned several Turbo TAs.

On the distributor you can get away with going with an earlier unit that has the mechanical and vacuum advance. Without the ccc hooked up the distributor will hunt with erratic acceleration. The distributor is the cam sensor, and the knock sensor adjusts the timing to prevent detonation. With those not working, it is just not going to run right.

On the carb you might want to look at the Holley Q-Jet Replacement. It's 650 CFM and it's much more modifiable. You might have to do some grinding on the plenum to get the secondary linkage to work. The Holley is Mechanical secondary. Plus you want to change front and back pumpers to the 50cc units. Power valve to 10.5 large window style. And port reference the throttle plate.

I have a C3 carb I can send you if you need for parts. Came off a 307 olds.
Oh actually, I will go full CCC on this engine. Using a 1983 Turbo Buick ECM (whic was a carburator Turbo car) and the CCC distributor, with the knock sensor, etc. My 1984 already has the wiring, will work it from there.

Going non-CCC ( e.g. no ECM) on a carburator turbo leaves only one option - using the 1978/79 Turbo control with its special distributor and knock sensor. I have a set of that, but will rather go with a true ECM.

See below, the bizare distributor and the infamous turbo control center, circa 1978/79, which is a primitive analog anti-knock solution...

20230204_172713.jpg
 
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Oct 14, 2008
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Yep, GM playing with some interesting stuff back then.

It is similar of today, other than the power numbers were much smaller back then. CAFE numbers, emissions and big V8's were a bad thing. Now V8's are starting to be replaced by Hybrid and Turbo, mostly Twin, V and Straight 6's. GM started it with the Jetfire and Corvair in the 60's. They revisited it in the late 70's with this 3.8 Buick V6. Ford brought it back with the EcoBoost V6, Dodge with the Hurricane Inline 6, even Toyota went Twin Turbo V6 in their trucks to replace their V8's. Will GM be next?
 

Supercharged111

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Oct 25, 2019
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It is similar of today, other than the power numbers were much smaller back then. CAFE numbers, emissions and big V8's were a bad thing. Now V8's are starting to be replaced by Hybrid and Turbo, mostly Twin, V and Straight 6's. GM started it with the Jetfire and Corvair in the 60's. They revisited it in the late 70's with this 3.8 Buick V6. Ford brought it back with the EcoBoost V6, Dodge with the Hurricane Inline 6, even Toyota went Twin Turbo V6 in their trucks to replace their V8's. Will GM be next?

Twin turbo V6 is a pig with a trailer. They pull great, but fuel economy can easily be worse than an N/A V8. Plus GM just invested a bunch of coin into their 6th gen V8, so I think we'll be enjoying them until the inevitable hostile EV takeover.
 
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Oct 14, 2008
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I really am curious how quick with the 2004R and better gearing, this sedan will be. Plus it's daily manners.
 
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