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#1347760 02/24/2020 5:06 PM
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'Bolter
'Bolter
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Want to really get 9:1 compression with the 848 head?

Talk to CP pistons.

Will update you guys once it's running.
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'59 Chevy Suburban, NAPCO
Ott3r #1347774 02/24/2020 7:23 PM
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Kettle Custodian (pot stirrer)
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Hmmmm- - - - -I'm going to guess the checkbook needed some CPR after that order! My one and only experience with Total Seal rings was with a fellow round track racer who insisted on using them in an engine I built and dyno tuned for him. After a season of running on a 5/8 mile paved oval once a week, we attempted to freshen up the engine. The cylinders were worn barrel-shaped, with the most wear in the center of the piston ring travel. We had to junk that block.
Jerry


"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
Ott3r #1347775 02/24/2020 7:24 PM
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'Bolter
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Thanks.
Did you send them a casting of your chamber, or did they have this contour on file?
Are there any instructions w/r/t preparation for use?

Ott3r #1347781 02/24/2020 8:18 PM
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'Bolter
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Haven't got the bill yet... but am bracing myself. They should be cheaper for the next guy now that the design exists.
I had to send them the cylinder head and then wait a really long time.

Thanks for the tip on Total Seal rings.
This is only the second engine I've assembled so I'll approach these rings with caution and dig up some instructions.

Out of curiosity before hand I CCed an early and late style 848 head and it looks like CR was only ~6.8 to 7.1 with the original flat top pistons. Apparently Chevy's marketing department really inflated these numbers... up above 8 if i recall.

Last edited by Ott3r; 02/24/2020 8:18 PM.

'59 Chevy Suburban, NAPCO
Ott3r #1347782 02/24/2020 8:28 PM
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I'm shooting for close to 9:1 compression on a 216 with flattop pistons, but I'm doing it with a stroker crank and a 60 overbore- - - -adding 7.5 cubic inches to each cylinder. That's increasing the cylinder volume by 123 CC's.

I don't think there's a way to avoid the oddball wear pattern from those rings. Most engines that run them are worn out or hand-grenaded with considerably less than 1,000 miles of running- - - -mostly at extremely high RPM. Doing race engine stuff on a street engine seldom ends well- - - - -at least with the several hundred high performance engines I've built over the past 50-something years. "Your Mileage May Vary"- - - -good luck!
Jerry



"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
Ott3r #1347785 02/24/2020 8:45 PM
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Bubba - Curmudgeon
Bubba - Curmudgeon
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Posts: 29,269
Hmmmmm ......

Does this thread belong in the Hi-Po Shop?

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Originally Posted by tclederman
Hmmmmm ......Does this thread belong in the Hi-Po Shop?

Probably. This type of engine build doesn't have much in common with 99.9% of the stovebolts on the road today, or maybe ever!
Jerry



"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!
Ott3r #1347793 02/24/2020 9:40 PM
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Posts: 7,440
Bolter
Bolter
Joined: Apr 2005
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“Does this thread belong in the Hi-Po Shop?”.

Gentlemen, at the bottom of every post is a box marked “Report”. Click on that box and notify the forum Moderator (not me) for review.


Martin
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Ott3r #1347802 02/24/2020 10:30 PM
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Posts: 29,269
Bubba - Curmudgeon
Bubba - Curmudgeon
Joined: Sep 2001
Posts: 29,269
Thanks, Martin - I did not know that (and, I rarely get referred-to as being a “gentleman”).

I will hereafter become an irritating/regular user of that "Report" “box/button”.


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