Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

> Engine displacement options
Harpo
post Oct 19 2011, 05:12 PM
Post #1


Senior Member
***

Group: Members
Posts: 1,304
Joined: 21-August 11
From: Motor City aka Detroit
Member No.: 13,469
Region Association: None



Good evening everyone,

With an engine rebuild in the near furure I want to explore my options about larger displacement. If stock 2.0 rods + 94mm pistons = 2.0L . Then what size pistons would I need for a 2.2L or a 2.4L.

Thanks

David
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
 
Reply to this topicStart new topic
Replies
SLITS
post Oct 19 2011, 05:23 PM
Post #2


"This Utah shit is HARSH!"
**********

Group: Benefactors
Posts: 13,602
Joined: 22-February 04
From: SoCal Mountains ...
Member No.: 1,696
Region Association: None



96 mm pistons & barrels = 2041 cc

100 mm pistons & barrels = 2218 cc

103 mm pistons & barrels = 2356 cc

105 mm pistons & barrels = 2450 cc
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Dave_Darling
post Oct 19 2011, 10:04 PM
Post #3


914 Idiot
**********

Group: Members
Posts: 14,991
Joined: 9-January 03
From: Silicon Valley / Kailua-Kona
Member No.: 121
Region Association: Northern California



QUOTE(SLITS @ Oct 19 2011, 04:23 PM) *

96 mm pistons & barrels = 2041 cc


That can't be right. The 71 stroke (stock 2.0 stroke) and 96mm cylinders make for 2056cc displacement.

In general, after you get to 96mm bore you start adding stroke. Over about 75-ish stroke, that gets rather complicated. After you get to 78mm stroke, you go back to larger bores but that also gets complicated and expensive.


Formula (for four-cylinder engines):
bore X bore X 3.1415926 X stroke / 1000 = displacement in cc.

So 96 * 96 * 3.1415926 * 76 / 1000 = 2200.422

--DD
User is offlineProfile CardPM
Go to the top of the page
+Quote Post

Posts in this topic


Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 



- Lo-Fi Version Time is now: 10th June 2024 - 06:27 PM