Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - Some interesting infromation for building a Street / race BBC
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Old 12-08-2006, 05:57 PM
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Bumpstick Bumpstick is offline
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An interesting article for sure... Might also be the reason I have 5 sets of large ovals (781`s & 049`s and some real cool semi-closed large ovals)

But just something to point out... The standard installed height of the valves in an oval port head is 1.880 which limits the spring you can use and the the lift considering coil bind, also the guides have to be machined to use anything over a .550 lift cam... Will cost more to modify for the .100 lift but still darn good heads for street/strip apps...

Rectangle port heads... Well that 026 casting I`m not to sure about...? Never even seen one, but the 188 & 990 castings have proved themselves just a time or two... Also installed heights of 1.950 or higher are a snap and no rotator eliminator is needed on the exhaust as with ovals... A solid roller with big lift is no biggie with the 188 or 990 and without a doubt on a big inch motor and RPM`s over 6500 the rectangle ports shine...


The app and your budget tell the tale...

Last edited by Bumpstick; 12-08-2006 at 06:09 PM.
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