|
|

|
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. |
|
|
| malcolm2 |
Oct 25 2016, 09:11 AM
Post
#1
|
|
Advanced Member ![]() ![]() ![]() ![]() Group: Members Posts: 2,749 Joined: 31-May 11 From: Nashville Member No.: 13,139 Region Association: South East States
|
I want to cover all my bases here. I have purchased the new GB CHT sensor from 914Rubber to try.
So, I think I will buy a spacer from Brad Mayeur to have the option. From what he says it should: "Porsche 914/4 Cylinder Head Temperature Sensor Extension. This little device slows down the heating of the sensor and improves warm up drivability." I do have "warm up drivability" problems = Low idle RPM until the VDO CHT hits about 250*F. So it seems like my problems don't need the warm up to slow down, it needs to SPEED UP. (IMG:style_emoticons/default/WTF.gif) 914LTD.com ![]() ![]() Also found on RATWELL (scroll down to WORKAROUNDS)http://www.ratwell.com/technical/TempSensorII.html#parts |
![]() ![]() |
| nine9three |
Nov 2 2016, 11:07 AM
Post
#2
|
|
Member ![]() ![]() Group: Members Posts: 142 Joined: 29-December 11 From: Oregon Member No.: 13,946 Region Association: Pacific Northwest |
I have the extension and it transformed my car when cold from a hunting idle to smooth as glass. No other issues when warm and still stable. All other components of the injection system function properly and are within spec. Because the ohm's change quickly with temperature there seems to be no issue with the described quick restart after warm rest. My experience has better than expected.
|
| Mikey914 |
Nov 3 2016, 11:31 AM
Post
#3
|
|
The rubber man ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() ![]() Group: Members Posts: 12,772 Joined: 27-December 04 From: Hillsboro, OR Member No.: 3,348 Region Association: None
|
I have the extension and it transformed my car when cold from a hunting idle to smooth as glass. No other issues when warm and still stable. All other components of the injection system function properly and are within spec. Because the ohm's change quickly with temperature there seems to be no issue with the described quick restart after warm rest. My experience has better than expected. Curious, I wonder if the real issue was a poor connection. The ohms drop off quickly above 150. For the head to hit 150, the engine is pretty warm as this is an external temp. If the issue was cold start and the difference is night and day maybe the wire would be suspect? This should only delay the curve, not improve it. |
malcolm2 CHT sensor extension Oct 25 2016, 09:11 AM
bretth If I understand it correctly it is meant to keep t... Oct 25 2016, 09:22 AM
Mikey914 Exactly. I have one also and may reproduce these. Oct 25 2016, 09:26 AM
BeatNavy
I do have "warm up drivability" problem... Oct 25 2016, 09:28 AM
pbanders
The possible downside, which is probably attribut... Oct 25 2016, 04:22 PM
BeatNavy
The possible downside, which is probably attribu... Oct 25 2016, 05:39 PM
pbanders
[quote name='pbanders' post='2415735' date='Oct 2... Oct 25 2016, 06:15 PM
malcolm2 I have checked what I understand to be the other c... Oct 25 2016, 09:36 AM
BeatNavy It doesn't slow down the engine warming. It s... Oct 25 2016, 09:45 AM
pbanders OK, I have one of these and have been using it for... Oct 25 2016, 04:19 PM
malcolm2 From this and other research it seems that I may j... Oct 25 2016, 06:52 PM
TX914 I wish some clever guru would create a way to modi... Oct 26 2016, 06:13 AM
BeatNavy
I wish some clever guru would create a way to mod... Oct 26 2016, 06:47 AM
Philip W. i have dealt with same issue with my 2.0 d-jet tha... Oct 26 2016, 07:15 AM
pbanders
i have dealt with same issue with my 2.0 d-jet th... Oct 26 2016, 01:42 PM
Mikey914 Well a rheostat would give you the ability to have... Oct 26 2016, 10:20 AM
pbanders See my edited response above.
BTW, it's nearl... Oct 28 2016, 04:32 PM
BeatNavy
What worked best was to start with key off, then ... Oct 28 2016, 04:46 PM
pbanders
What worked best was to start with key off, then... Oct 28 2016, 05:59 PM
porsche913b_sp I will have to keep you all's suggestions in m... Oct 28 2016, 04:46 PM
pbanders Here's the schematic for using a DPDT switch a... Oct 28 2016, 06:02 PM
pbanders I never was worth a crap as an EE, I was more of a... Oct 28 2016, 06:06 PM
pbanders OK, here's a circuit version with two pots, on... Oct 28 2016, 06:35 PM
pbanders OK, I can't stop, here's one more circuit ... Oct 28 2016, 06:48 PM
Spoke
OK, I can't stop
I know the feeling. Here... Oct 28 2016, 08:37 PM
pbanders
[quote name='pbanders' post='2417044' date='Oct 2... Oct 28 2016, 09:47 PM
pbanders One thing I always know for sure: If I draw a circ... Oct 28 2016, 09:52 PM
TX914 Very nice. This seems closer to being realized. I ... Oct 29 2016, 08:19 AM
pbanders
Very nice. This seems closer to being realized. I... Oct 29 2016, 05:35 PM
timothy_nd28 Instead of a switch, why not a small circuit that ... Oct 29 2016, 09:02 AM
pbanders
Instead of a switch, why not a small circuit that... Oct 29 2016, 05:36 PM
timothy_nd28 RE: CHT sensor extension Oct 29 2016, 07:17 PM
TX914 I'll take 2 of those. :) Oct 29 2016, 09:21 PM
pbanders Tim, thanks, I've got all those components exc... Oct 30 2016, 07:28 AM
timothy_nd28 Sorry, I know it wasn't helpful but I happen t... Nov 1 2016, 11:28 PM
porsche913b_sp
I have the extension and it transformed my car wh... Nov 3 2016, 11:44 AM
Mikey914 What I'm getting at is you installed a new CHT... Nov 3 2016, 11:55 AM
pbanders I have the tester box all put together, not wired ... Nov 3 2016, 11:24 PM
pbanders OK, I got it all together and installed, and went ... Nov 4 2016, 06:59 PM![]() ![]() |
|
Lo-Fi Version | Time is now: 2nd April 2026 - 10:25 AM |
| All rights reserved 914World.com © since 2002 |
|
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |