Need some help with calculating compression ratio

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Mar 3, 2013 | 02:13 PM

hovic

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Joined: Oct 2003

Posts: 418

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From: Hamburg/, Germany, Germany

Need some help with calculating compression ratio

Hey guys.
I´ve searched alot and tried the zealautowerks compression calculator but couldn´t calculate the compression ratio.

I´ve got some 83mm CP pistons (8.5:1 for B18C block, B18B Crank and B18C1 head)

Since I want to go with a sleeved B16A2 block and B16A2 head instead with the B18C combo I would like to know the new compression ratio with theese pistons installed in the B16. The pistons have never been used. The PN is 76834.

Compression Hight 1.181
bore 3.268
dish depth -0.165
dome hight 0

Would be great if someone can help me out with my problem.

Mar 3, 2013 | 10:22 PM

civicsitek GanGsTa

Honda-Tech Member

Joined: Aug 2002

Posts: 1,529

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From: Spokane, WA, USA

Re: Need some help with calculating compression ratio

I come up with 8.3:1 using b16 block crank and rods using -8 cc dish and 30mm compression height

Last edited by civicsitek GanGsTa; Mar 6, 2013 at 02:09 PM.

Mar 5, 2013 | 12:18 PM

hovic

Thread Starter

Honda-Tech Member

Joined: Oct 2003

Posts: 418

Likes: 1

From: Hamburg/, Germany, Germany

Re: Need some help with calculating compression ratio

Quote:

Originally Posted by civicsitek GanGsTa

Pistons won't work. B16 deck height is too short. LS crank and rods with those pistons will slam into the head.

Thats why I want to use the B16 crank and rods ;-)

Mar 5, 2013 | 12:42 PM

Turbo-LS

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From: South, Texas

Re: Need some help with calculating compression ratio

www.zealautowerks.com

IF YOU INPUT ALL THE CORRECT INFORMATION IT WILL GIVE YOU ALL THE INFORMATION YOU NEED

Last edited by Turbo-LS; Mar 5, 2013 at 01:05 PM.

Mar 5, 2013 | 12:59 PM

MRGRIM

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From: Melbourne, Australia

Re: Need some help with calculating compression ratio

http://www.zealautowerks.com/bseries.html

if your just useing stock parts try this

Mar 6, 2013 | 10:47 AM

hovic

Thread Starter

Honda-Tech Member

Joined: Oct 2003

Posts: 418

Likes: 1

From: Hamburg/, Germany, Germany

Re: Need some help with calculating compression ratio

Quote:

Originally Posted by Turbo-LS

www.zealautowerks.com

IF YOU INPUT ALL THE CORRECT INFORMATION IT WILL GIVE YOU ALL THE INFORMATION YOU NEED

Quote:

Originally Posted by hovic

Hey guys.
I´ve searched alot and tried the zealautowerks compression calculator but couldn´t calculate the compression ratio.

Mar 6, 2013 | 10:48 AM

hovic

Thread Starter

Honda-Tech Member

Joined: Oct 2003

Posts: 418

Likes: 1

From: Hamburg/, Germany, Germany

Re: Need some help with calculating compression ratio

Quote:

Originally Posted by MRGRIM

http://www.zealautowerks.com/bseries.html

if your just useing stock parts try this

Quote:

Originally Posted by hovic

.....I´ve got some 83mm CP pistons (8.5:1 for B18C block, B18B Crank and B18C1 head)

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Mar 6, 2013 | 10:59 AM

Muckman

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Joined: Sep 2001

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From: Buffalo, NY

Re: Need some help with calculating compression ratio

Its probably bc CP's piston catalog is horrible and for some reason they don't feel it's necessary to list important specs such as dome volume so people cannot accurately calculate compression. Contact CP, get the volume in CCs and go back to Zealwerks.