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Old 11-30-2020, 10:28 AM   #41
1931 flamingo
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Default Re: Big Boys Heads

Those look kile KOGEL hi-comp heads, available in two diff comp ratios, cast iron finned with 25% increase in water capacity. Not many made. I've a pair on my 40.
Paul in CT
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Old 11-30-2020, 10:39 AM   #42
Tim Ayers
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Those look kile KOGEL hi-comp heads, available in two diff comp ratios, cast iron finned with 25% increase in water capacity. Not many made. I've a pair on my 40.
Paul in CT
Yes, these are rare. I seem to recall an issue with them cracking, so I'd get them checked out before throwing them on a motor. It would be cheap insurance.
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Old 11-30-2020, 12:33 PM   #43
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Default Re: Big Boys Heads

Those are kind of cool - similar in concept the the KR heads.
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Old 11-30-2020, 01:51 PM   #44
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Those are kind of cool - similar in concept the the KR heads.






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Old 11-30-2020, 03:54 PM   #45
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Wow !!!
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Old 11-30-2020, 04:22 PM   #46
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Now I have to find a picture of the Grancore??? Heads.
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Old 11-30-2020, 04:48 PM   #47
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Default Re: Big Boys Heads

Are those from an Oldsmobile?
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Old 11-30-2020, 07:36 PM   #48
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Default Re: Big Boys Heads

I'm having a hard time seeing the shape of the chamber directly above the piston. It sort of looks domed, but not as domed as a stock chamber. Does anyone else see that, or does it look flat to you?
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Old 11-30-2020, 07:58 PM   #49
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Default Re: Big Boys Heads

Looks flat to me and I would assume mated to flat top pistons.
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Old 12-01-2020, 01:10 PM   #50
Ol' Ron
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Default Re: Big Boys Heads

Grancor combustion chamber
Attached Images
File Type: jpg BV motor-2 017.jpg (66.7 KB, 231 views)
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Old 12-01-2020, 01:12 PM   #51
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Wish I knew how to make the picture bigger.
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Old 12-01-2020, 01:25 PM   #52
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Default Re: Big Boys Heads

That's a "thumbnail". I "Clicked" on it and it came up to a decent size.

You done good.
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Old 12-01-2020, 06:39 PM   #53
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Default Re: Big Boys Heads

mtt
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Old 12-01-2020, 09:19 PM   #54
Yoyodyne
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Wish I knew how to make the picture bigger.
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Old 12-01-2020, 11:13 PM   #55
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Default Re: Big Boys Heads

Thanks, those are the heads that were onmy Bville engine. I wonder where they are now??
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Old 12-02-2020, 06:00 AM   #56
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Default Re: Big Boys Heads

The Grancor are the better design for flow/power.
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Old 12-02-2020, 09:26 AM   #57
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Default Re: Big Boys Heads

As you can see the heads have a sligth popup for the 3 3/4 stroke pistons. Also the piston clearance. I made a doming tool to equal the clearance. simple HC.
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Old 12-03-2020, 02:47 PM   #58
Bored&Stroked
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Default Re: Big Boys Heads

I like those chambers . . . wished I owned a set of those heads! Anybody got a "spare set" that they're not going to use???
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Old 12-10-2020, 04:07 PM   #59
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Default Re: Big Boys Heads

aren't the Rocket heads kind of a mirror image? That is they have a deeper trough on the exhaust side.
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