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Old 03-19-2011, 01:23 AM
 
2,894 posts, read 7,856,603 times
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I was surprised that each of these three motors were only built for 3 years, the Oldsmobile 425's from 1965-67 and the Pontiac 428's and Buick 430's from 1967-69 considering how powerful these motors were, I also wondered how good of a quality these motors were?
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Old 03-19-2011, 01:30 AM
 
Location: Northridge/Porter Ranch, Calif.
22,151 posts, read 26,611,024 times
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Yes, kind of surprising. Those were all good engines (not "motors"), too.
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Old 03-19-2011, 07:25 AM
PDD
 
Location: The Sand Hills of NC
8,776 posts, read 14,138,585 times
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The one thing these engines all had in common along with the 430 CI Lincoln/ Thunderbird engines was that they made pretty good torque at low rpms which was great for moving big heavy cars. What they probably all lacked were real good breathing cylinder heads which we all know is the biggest factor in making horsepower in performance engines.
Remember in the 50's the popularity of Olds, Cadillac engines and nail head Buicks in Hot Rods was soon surpassed with the introduction of the SB Chevy which like it or not is the most popular hot rod engine with the sb Ford running a close second.

Another thing that made those engines disappear was the decision of GM to go to a corporate Big Block engine and the BB Chevy was certainly a better choice than the others.
I don't think those engines were bad engines just that they were surpassed by a better engine.

I have no facts and this is just my opinion and best guess so don't slam me because I have a different opinion than you do.
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Old 03-22-2011, 10:43 PM
 
2,894 posts, read 7,856,603 times
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Quote:
Originally Posted by PDD View Post
The one thing these engines all had in common along with the 430 CI Lincoln/ Thunderbird engines was that they made pretty good torque at low rpms which was great for moving big heavy cars. What they probably all lacked were real good breathing cylinder heads which we all know is the biggest factor in making horsepower in performance engines.
Remember in the 50's the popularity of Olds, Cadillac engines and nail head Buicks in Hot Rods was soon surpassed with the introduction of the SB Chevy which like it or not is the most popular hot rod engine with the sb Ford running a close second.

Another thing that made those engines disappear was the decision of GM to go to a corporate Big Block engine and the BB Chevy was certainly a better choice than the others.
I don't think those engines were bad engines just that they were surpassed by a better engine.

I have no facts and this is just my opinion and best guess so don't slam me because I have a different opinion than you do.
I sometimes wish the 455ci V8 would have been available for Pontiac and Buick in 1968 instead of 1970 cause the high compression 455 engines were only available for one year for Buick and Pontiac
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Old 03-22-2011, 10:49 PM
 
16,438 posts, read 18,513,116 times
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As cited above, they didn't have very good breathing heads. Even the Pontiac 428 Super Duty heads were anemic compared to a big block Chevy 427, Ford 427 and 428, or 426 Chrysler wedge.
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Old 03-22-2011, 10:58 PM
 
Location: Northeast Tennessee
7,303 posts, read 22,737,174 times
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All were good imo. The Pontiacs 428 is a sought after engine among old Pontiac fans. Back in the 1990s, my cousin in eastern Virginia had a 1969 Pontiac Catalina Safari station wagon with the 428 engine option. Someone once offered him $1500 just for the engine!
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Old 03-22-2011, 11:56 PM
 
Location: Midwest
3,699 posts, read 6,714,876 times
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Yes. Good.
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Old 03-23-2011, 08:50 AM
 
1,739 posts, read 4,821,790 times
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The engines were just getting bigger then
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Old 03-23-2011, 05:25 PM
 
Location: West Michigan
12,084 posts, read 33,134,961 times
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I had an Olds with the high compression 425. It could move that big ol heavy car like no tomorrow... just don't expect to actually turn the thing at speed. I sold the clapped out old thing to a guy for $1200 just for the motor. Great motor! Still wish I had been able to keep it to stuff in something else.
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Old 03-23-2011, 05:50 PM
 
Location: In the basket
9,584 posts, read 11,167,117 times
Reputation: 5824
Ah...the 428 Pontiac...a tear just ran down my cheek...
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