 CHT guage readings, What should they be? |
|
|
|
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. |
|
|
  |
| Jaiden |
 Aug 2 2005, 12:29 PM
Post
#1
|
|
Member  Group: Members Posts: 346 Joined: 13-January 05 From: Stroudsburg PA Member No.: 3,443  |
I installed my CHT guage and sender (voltage type) yesterday on cylinder 3 and did not get a chance to run the car to temp.
What range should the readings be? I do not have any other temp sensors hooked up on the car yet. Hopefully I'll get the new sender for the 912 Oil temp guage installed tonight. I just want to make sure that the car is running within spec so I can start driving her. I did not want to drive the car very much without knowing the state of the engine. |
   |
 
|
| Mueller |
Aug 2 2005, 12:44 PM
Post
#2
|
||
|
914 Freak! Group: Members Posts: 17,155 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
|
this is from Jake Raby from another thread:
I recommend you browse the entire thread for some more infomation that'll be nice to know. CHT questions and answers and more... |
||
|
|
|
||
| lapuwali |
Aug 2 2005, 12:59 PM
Post
#3
|
|
Not another one! Group: Benefactors Posts: 4,526 Joined: 1-March 04 From: San Mateo, CA Member No.: 1,743  |
My 1.7 with Webers but stock otherwise did these kinds of numbers:
275-325 when tootling around on surface streets 325-375 cruising at 70mph 375-400 climbing a steep grade Note that CHT figures are very sensitive to engine load, not revs or even ambient temps. HOWEVER, the VDO and Westach gauges are calibrated to read correctly at roughly 70dF ambient temp. If it's hotter than this outside, the gauge will read LOW. If it's colder than this, the gauge will read HIGH. So, the numbers are fairly approximate. On a 100dF day, freeway cruising should show closer to 325. On a 30dF day, freeway cruising should show closer to 375dF, all else the same. On a 70dF day, 350dF is about right. Oil temps lag CHT by a large margin. After startup, you'll find CHT will hit roughly 300dF within one minute of just idling, where oil temp will remain below 180dF for several minutes. Oil temp seems to be affected more my ambient temps, and they generally go up with revs. Oil temps change fairly slowly, where CHT changes pretty quickly. On the 912 oil temp gauge, the temp is about 180dF when the needle is on the hot end of the lower white box. 220dF is roughly midway between the boxes, and 240dF is the cold end of the upper white box. The red line is about 280dF. I don't have an oil temp gauge in my 914 (yet), but in my 912, it runs about 190dF on cold days, 220dF on hot days. |
|
|
|
| Jaiden |
Aug 2 2005, 01:36 PM
Post
#4
|
|
Member Group: Members Posts: 346 Joined: 13-January 05 From: Stroudsburg PA Member No.: 3,443 |
Thanks alot guys!!!
|
|
|
|
| 914forme |
Aug 2 2005, 04:09 PM
Post
#5
|
|
Times a wastin', get wrenchin'! Group: Members Posts: 3,896 Joined: 24-July 04 From: Dayton, Ohio Member No.: 2,388 Region Association: None
|
Hopefully less than 1220.58 F or you will have something to write about.
|
|
|
|
| Jaiden |
Aug 3 2005, 06:14 AM
Post
#6
|
|
Member Group: Members Posts: 346 Joined: 13-January 05 From: Stroudsburg PA Member No.: 3,443 |
Well checked the temp last night and was running around 275-300 so it looks like I'm good to go!!!!
Thanks again for the info! |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 11th July 2025 - 05:56 AM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.