Oldsmobile Hi-Swirl Head indentification Help
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Oldsmobile Hi-Swirl Head indentification Help
Oldsmobile Hi-Swirl Head indentification Help
i found this Olds Head in my Shop , i have only 1 these Heads
anyone know what Year , what Cubic Inch Olds Engine this fits ??
is this any sort of a rare Head ??
i found this Olds Head in my Shop , i have only 1 these Heads
anyone know what Year , what Cubic Inch Olds Engine this fits ??
is this any sort of a rare Head ??
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Re: Oldsmobile Hi-Swirl Head indentification Help
Larry,
I believe the 7A heads were used on 350 ci engines. Is the valve size 1.875 and 1.562?
Stan
I believe the 7A heads were used on 350 ci engines. Is the valve size 1.875 and 1.562?
Stan
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Re: Oldsmobile Hi-Swirl Head indentification Help
Late 80's 307 swirl port head ,junk, the better 7a head has the "a" smaller than the 7.
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Re: Oldsmobile Hi-Swirl Head indentification Help
by Stan Weiss » Wed Apr 11, 2018 11:54 pm
Larry,
I believe the 7A heads were used on 350 ci engines. Is the valve size 1.875 and 1.562?
Stan
thanks Stan and DrillDawg for that Info ,
i'll just get rid of that Head ,
i have no idea how it got in my Shop anyways
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Re: Oldsmobile Hi-Swirl Head indentification Help
Late 1985 casting , so it likely went out the door on a 1986 motor.
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Re: Oldsmobile Hi-Swirl Head indentification Help
That is definitely a 307 head, but as an FYI, there were 5A, 6A, and 7A heads that were cast for late 60s / early 70s 350s with the A the same size as the number. I have a set of the oddball 5A heads on mine that were cast in a different foundry or something. Both the main number and the casting number pad have the "A" suffix.
I don't have a picture of the casting number pad between the center exhaust ports handy.
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Re: Oldsmobile Hi-Swirl Head indentification Help
Something similar in concept to the Chevy heads with that basic design.
There are a few people running the late roller cam 307 in Stock Eliminator, think 86, 87, and 88 Cutlass. Might be how you came to have one, Larry.
There are a few people running the late roller cam 307 in Stock Eliminator, think 86, 87, and 88 Cutlass. Might be how you came to have one, Larry.
Re: Oldsmobile Hi-Swirl Head indentification Help
Junk for a performance application, but they worked exceptionally well for what they were designed for. In a mid 80’s olds 88, 2.41’s and a 200R4 trans (!), 22mpg at 80 mph...best long distance road trip car ever! Just keep the EGR passages clean!
Re: Oldsmobile Hi-Swirl Head indentification Help
Even if it was given to you, It's not worth the money to ship to you for use as a good boat anchor. JK.
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Re: Oldsmobile Hi-Swirl Head indentification Help
Yes! I got 22-25mpg highway with my '84 Delta 88 Royale Brougham and the computerized carb. Add a 25 gallon tank and you can really reach out!
Mike Gallo, President
Protohawk - Design/Prototyping, Small Project Support, and Contract Manufacturing
CCA Racing Products - Torque Plates and Engine Rebuild Tooling
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