 compression numbers, how bad are these |
|
|
|
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. |
|
|
| mobymutt |
 Oct 8 2017, 06:46 AM
Post
#1
|
|
Senior Member  Group: Members Posts: 553 Joined: 16-December 13 From: Kingston, Ontario, Canada Member No.: 16,770 Region Association: Canada  |
Just did a compression check, here's what I measured:
108, 120, 96, 85 I've got a stock 1.8L, but would like to build a 1911 or 2056 in the relatively near future. Hopefully I'll be ok for another year or so with the current setup. |
   |
 
|
  |
Replies
| rgalla9146 |
Oct 8 2017, 07:48 AM
Post
#2
|
|
Advanced Member Group: Members Posts: 4,671 Joined: 23-November 05 From: Paramus NJ Member No.: 5,176 Region Association: None 
|
A leakdown test should be done as well. It will give more specific info.
The compression test should be done after a proper valve adjustment on a cold engine. For the compression test the engine should be at operating temp, battery fully charged, fuel pump disabled, wide open throttle and uniform number of compression strokes on each cylinder. Your engine may be healthier than you think |
|
|
|
| malcolm2 |
Oct 8 2017, 04:14 PM
Post
#3
|
|
Advanced Member Group: Members Posts: 2,747 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States
|
QUOTE(rgalla9146 @ Oct 8 2017, 08:48 AM)  The compression test should be done after a proper valve adjustment on a cold engine. Totally agree. Double check your valve clearances. I thought I had a problem with 1 cylinder. Adjusted the valves and rechecked the compression. I got a better balance of comp #s. |
|
|
|
Posts in this topic
mobymutt compression numbers Oct 8 2017, 06:46 AM
914Sixer Looks like time to rebuild. Go for the 2056. Oct 8 2017, 07:02 AM DM_2000 Do a leak down test, that wil let you know where t... Oct 8 2017, 07:13 AM mobymutt Full disclosure: I did just have the engine apart,... Oct 8 2017, 08:31 AM
rgalla9146
Full disclosure: I did just have the engine apart... Oct 8 2017, 09:11 AM
Morrie
Full disclosure: I did just have the engine apar... Oct 8 2017, 10:56 AM porschetub
Full disclosure: I did just have the engine apart... Oct 8 2017, 01:53 PM cuddyk If you separated the pistons and jugs and didn... Oct 8 2017, 02:27 PM DM_2000 I don't do the often repeated "add oil to... Oct 8 2017, 04:05 PM mobymutt Thanks to all for the responses (and patience, as ... Oct 8 2017, 04:17 PM Mark Henry Start saving some coin Matt, likely there's go... Oct 8 2017, 05:17 PM mobymutt
Start saving some coin Matt, likely there's g... Oct 8 2017, 06:42 PM injunmort consider the tangine racing cable set up rather th... Oct 8 2017, 05:23 PM mobymutt
consider the tangine racing cable set up rather t... Oct 8 2017, 06:39 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 28th December 2024 - 12:11 AM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.