 Put the 2.0L exhaust on, now the engine runs hotter... |
|
|
|
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. |
|
|
  |
| rhcb914 |
 May 19 2006, 07:58 AM
Post
#1
|
|
member  Group: Members Posts: 358 Joined: 3-February 04 From: Boston, MA Member No.: 1,626  |
A few weeks ago I swapped my 1.7/1.8 heat exchangers and Bursch glass pack muffler in favor of the stock 2.0L setup. I took the car for a spin and noticed right off that it was running on average 25 degrees hotter head temps than with the old exhaust. I figured that I'll tune it up, adjust the valves, synch the carbs and see how it runs then. Finally got around to that yesterday now that Noah's flood has receded here in NE. The car runs great but head temps are still 25 degrees hotter on average at all speeds. On the highway at about 3500 rpm it used to run about 325 and touch 350 climbing a hill in 5th. Now it seem to run closer to 350 in 5th and raise slightly past when climbing. Now these temps are measured with the super accurate VDO head temp gage (IMG:style_emoticons/default/smile.gif) so I'm not sure if I should worry or not. Other than the hotter head temps the engine runs great!
Should I be concerned about a restriction in the exhaust somewhere? Do these temps seem right? Thanks -Rob |
   |
 
|
| Joe Bob |
May 19 2006, 08:46 AM
Post
#2
|
|
Retired admin, banned a few times Group: Members Posts: 17,427 Joined: 24-December 02 From: Boulder CO Member No.: 5 Region Association: None |
Got the right sheet metal and thermostat connections?
|
|
|
|
| rhcb914 |
May 19 2006, 10:00 AM
Post
#3
|
|
member Group: Members Posts: 358 Joined: 3-February 04 From: Boston, MA Member No.: 1,626 |
The thermostat didn't look any different so I didn't swap that. I did watch it open as the car warmed up. The 2 lower peices of sheet metal are long gone when I swapped to a side shift tranny. Never had an issue with it running hot before. I think I have an old rusty set that I can put on. I'll give it a shot.
|
|
|
|
| newto914s |
May 19 2006, 12:48 PM
Post
#4
|
|
Senior Member Group: Members Posts: 561 Joined: 16-February 04 From: Thornton, CO Member No.: 1,663 |
Was your old 1.7/1.8 HEs SS?
Also, what muffler do you have on the 2liter HEs now? I would think that any restriction in flow would cause higher CHTs. So if you had SS HEs going through a Bursch, I would think anything but going to a kerry hunter or tangerine system would be stepping backwards. I have a 75/76 exhaust (IMG:style_emoticons/default/barf.gif) , and I'm hoping when I backdate my CHTs will come DOWN 25 degrees Samson |
|
|
|
| Joe Ricard |
May 19 2006, 01:58 PM
Post
#5
|
|
CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
You are flowing more iar and probably 2 sizes too small on the air correction
Maybe on the idles go up a size also. What ya got now? I had this happen when I went form 2.0L SSI Bursch to Tangerine Phase 9. one and a half sizes bigger on idle and from 130 to 140 main gas. |
|
|
|
| lilly4324 |
May 19 2006, 06:40 PM
Post
#6
|
|
Newbie Group: Members Posts: 8 Joined: 17-November 05 From: oakley,CA Member No.: 5,144 |
QUOTE(Joe Ricard @ May 19 2006, 12:58 PM)  You are flowing more iar and probably 2 sizes too small on the air correction Maybe on the idles go up a size also. What ya got now? I had this happen when I went form 2.0L SSI Bursch to Tangerine Phase 9. one and a half sizes bigger on idle and from 130 to 140 main gas. |
|
|
|
| lilly4324 |
May 19 2006, 06:42 PM
Post
#7
|
|
Newbie Group: Members Posts: 8 Joined: 17-November 05 From: oakley,CA Member No.: 5,144 |
yea ihvae that problem to. only i have a 1.7 xhaust on my 2.0 is that causing overheating huh
|
|
|
|
| Joe Ricard |
May 19 2006, 07:48 PM
Post
#8
|
|
CUMONIWANNARACEU Group: Members Posts: 6,811 Joined: 5-January 03 From: Gautier, MS Member No.: 92 |
Ever try and breath through a straw?
Other things that affect engine heat are timing. Too lean is always tough to trouble shoot on a carb without some sort of air fuel meter. Got to know what circuit is lean. idle, acceleration or main gas |
|
|
|
|
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 17th May 2024 - 01:50 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.