 Questions on Big Bore Kits on a 1.8 |
|
|
|
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. |
|
|
| Beamer13 |
 Nov 20 2007, 12:45 AM
Post
#1
|
|
Member  Group: Members Posts: 303 Joined: 8-November 07 From: Midwest Member No.: 8,308 Region Association: Upper MidWest  |
Ok, so I'm considering (since I have to drop the engine anyway) going to a big bore kit (96mm) What exactly should I know, or what will I need to do??? I am new to Porsche and 914. If there is another thread somewhere on this, by all means please direct me to the right thread. Thanks, in advance, for everyone's help on this forum!! You've been great!!!
|
   |
 
|
  |
Replies
| Twystd1 |
Nov 21 2007, 01:22 AM
Post
#2
|
|
You don't want to know... really..... Group: Members Posts: 2,515 Joined: 12-September 04 From: Newport Beach, California Member No.: 2,743 |
Jim,
The answer is pretty simple. When the diameter of the piston increases and the combustion chamber stays the same size. This larger piston is now bringing MORE air and fuel into the cylinder as it goes down the bore. Then when the piston starts to rise to TDC (or close to it) There is more air / fuel in the cylinder. That means the static compression ratio will go up. (Man I suck at explaining this... Lets try this. Imagine you have lawn mower engine with a 3 inch across piston. Now lets say you bore out that cylinder and stick in a 10 inch piston. Imagine how much more air it would compress on the combustion stroke. A bunch. Hence upping the static CR. OK.. I give up. I suck at explaining stuff..... Cheers, Clayton |
|
|
|
Posts in this topic
Beamer13 Questions on Big Bore Kits on a 1.8 Nov 20 2007, 12:45 AM
Beamer13 :bump: Nov 20 2007, 01:27 AM Twystd1 Do you want to keep your stock fuel injection?
Or... Nov 20 2007, 02:04 AM johannes Stroke will give you torque ... Go 2056
BTW there... Nov 20 2007, 02:42 AM lotus_65 raby's sites Nov 20 2007, 05:24 AM type47 big bore kits (96mm pistons and cylinders) for 2.0... Nov 20 2007, 07:04 AM Joe Ricard All of it is bolt in once you spit the case. Nov 20 2007, 08:08 AM Beamer13 So basically what you are saying is that I can jus... Nov 20 2007, 08:15 AM
type47
So basically what you are saying is that I can ju... Nov 20 2007, 08:59 AM Beamer13 Very cool!! Thanks much! Nov 20 2007, 09:13 AM Cap'n Krusty Upping the bore from 93 to 96mm will raise your co... Nov 20 2007, 09:38 AM type47
Upping the bore from 93 to 96mm will raise your c... Nov 20 2007, 11:50 AM Beamer13 Thanks!! Good info! I can tell that ... Nov 20 2007, 09:40 AM blitZ Increasing displacement is a plus. However, getti... Nov 20 2007, 09:43 AM Beamer13 Ok, a friend of mine just brought me back down to ... Nov 20 2007, 09:58 AM Beamer13 Big bore that is :-) Hopefully will have engine o... Nov 20 2007, 11:46 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 2nd April 2026 - 01:31 PM |
Invision Power Board
v9.1.4 © 2026 IPS, Inc.