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2009 CTS White Diamond base, 1992 Brougham White/White 5.7
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Discussion Starter #1 (Edited)
Regarding 1990-1992 Broughams with the 350, why is the 1990 rated at 175 hp and 185 in 91 and 92? Is it easy to get that 10hp into a 90? I know it's not a big jump, but I'm curious.

On a side note, has anyone painted their 90-92 Brougham? Curious about how panels and plastic on bumpers were handled. Would a quality paint job on these parts last?

While we're at it, would the front bumper from an 87 Brougham fit on a 90-92 nicely?

Thanks in advance!
 

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1989 Sedan DeVille is now just a fond memory ....
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What is the fuel delivery for the 90 vs the 91-92? Are they both the same?
I could see a difference if the 90 was throttle body injection and the 91-92 were port fuel injection.
I'm not at all familiar with the specifics so maybe some one can let us know.
 

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2009 CTS White Diamond base, 1992 Brougham White/White 5.7
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Discussion Starter #3
Kev said:
What is the fuel delivery for the 90 vs the 91-92? Are they both the same?
I could see a difference if the 90 was throttle body injection and the 91-92 were port fuel injection.
I'm not at all familiar with the specifics so maybe some one can let us know.
I believe it was TBI for all years.
 

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94 Fleetwood Brougham
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7,534 Posts
Head and cam revisions?
 

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2009 CTS White Diamond base, 1992 Brougham White/White 5.7
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Discussion Starter #5
N0DIH said:
Head and cam revisions?
Absolutely no clue. I wonder if I stumped the community? I talked to a few friends who I thought knew everything about Caddies and Lincolns but nope.
 

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1995 Fleetwood Brougham
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709 Posts
Didnt a 90 have a single exhaust compared to a 91-92 that had dual?
 

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2009 CTS White Diamond base, 1992 Brougham White/White 5.7
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Discussion Starter #7
FASSTWOOD said:
Didnt a 90 have a single exhaust compared to a 91-92 that had dual?
Seems the Compression ratio in 90 was 9.3:1 and 9.8:1 in 91 and 92. Not sure if this is the reason for the 10hp difference, but I guess so.

I don't think Broughams ever had dual exhausts unless added afterwards.
 

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1991 Cadillac Brougham D'Elegance 5.7 Litre, 1994 DeVille
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1991s and 1992s didn't have dual exhaust but maybe they did change something with that. I think the torque is lower for 1990 too. There are a bunch of things different between them and the 1991 and 1992s.
 

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2-90 Brougham 5.7, 82 S&S Hearse
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91-92 has different cam,injectors, and ECM... and remember that mfg ratings should always be taken with a grain of salt... ;)
 

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2009 CTS White Diamond base, 1992 Brougham White/White 5.7
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Discussion Starter #10
Broughamadrosis said:
91-92 has different cam,injectors, and ECM... and remember that mfg ratings should always be taken with a grain of salt... ;)
Thanks! This was very helpful!!!
 

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94 FWB, 93 SDV, 94 FWB (sold), 90 Brougham (sold)
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brougham said:
1991s and 1992s didn't have dual exhaust but maybe they did change something with that. I think the torque is lower for 1990 too. There are a bunch of things different between them and the 1991 and 1992s.
I know my torque peak is at 2000 RPM, isn't it at 2200 or something like that for 91 92?
 

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94 Fleetwood Brougham
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Compression change likely calls for revised cam, and compression change on a Chevy does mean 80% chance of head change. I know Pontiacs all had the same type pistons (flat top) so all compression changes were head changes. Chevy I think was similar, but they did dish pistons from time to time.

caddieboy said:
Seems the Compression ratio in 90 was 9.3:1 and 9.8:1 in 91 and 92. Not sure if this is the reason for the 10hp difference, but I guess so.

I don't think Broughams ever had dual exhausts unless added afterwards.
Duals would have looked great on those cars. BUT, GM didn't want to certify the exhaust change (GM has some real goofballs don't they?!??). You would think they would to "compete" with Ford putting duals on all the 302's.
 

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2009 CTS White Diamond base, 1992 Brougham White/White 5.7
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Discussion Starter #13
N0DIH said:
Duals would have looked great on those cars. BUT, GM didn't want to certify the exhaust change (GM has some real goofballs don't they?!??). You would think they would to "compete" with Ford putting duals on all the 302's.
Guess they forgot what "Cadillac" means. Better than the rest. Ahh well...
 
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