Pelican Parts
Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help



Go Back   Pelican Parts Technical BBS > 1- Porsche Technical Forums > 911 / 930 Turbo & Super Charging Forum


Reply
 
LinkBack Thread Tools Rate Thread
Author
Thread Post New Thread    Reply
Porsche Junky
 
mede8er's Avatar
 
Join Date: Nov 2004
Location: Salida, CO
Posts: 1,804
Garage
Where is your CHT....

plumbed in....

New to me 1986 Turbo...CHT thermocouple is attached to #6 exhaust stud....

Getting reading of 450 degrees and I've got it rich, on the verge of oscillation....

Is this within range??? Wouldn't the exhaust temps read higher than the cylinder head temps???

TIA
__________________
1986 930 RUF equipped
Old 05-28-2007, 11:15 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #1 (permalink)
Porsche Junky
 
mede8er's Avatar
 
Join Date: Nov 2004
Location: Salida, CO
Posts: 1,804
Garage
BTW...a meat thermometer touching #6 cyl head reads 180 while the CHT reads 250....
__________________
1986 930 RUF equipped
Old 05-28-2007, 11:47 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #2 (permalink)
Registered User
 
WydRyd's Avatar
 
Join Date: Mar 2002
Posts: 3,563
My factory CHT sensor screws into cylinder head # 3.
__________________
Merv
'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
Old 05-28-2007, 02:43 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #3 (permalink)
Porsche Junky
 
mede8er's Avatar
 
Join Date: Nov 2004
Location: Salida, CO
Posts: 1,804
Garage
Thank you sir...an exhaust bolt didn't seem to be the right place to check CHT.....
__________________
1986 930 RUF equipped
Old 05-28-2007, 04:17 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #4 (permalink)
Registered User
 
WydRyd's Avatar
 
Join Date: Mar 2002
Posts: 3,563
No, it really should be embedded into the head itself for a more accurate reading.
__________________
Merv
'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
Old 05-28-2007, 07:43 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #5 (permalink)
Registered User
 
Maltese Falcon's Avatar
 
Join Date: Aug 2004
Location: Mulholland Dr. SoCal
Posts: 537
My readings (3.3) run between 300 to 350 deg. f
On another turbo engine (3.2 twin) where I run a horizontal fan , the temps run 250 to 300 deg. f
If you can get the thermocouple sender fastened into the head itself, you could get the truest reading. When attaching it to an exhaust stud you may pick up irrelevant ambient heat off of the header tube.
Marty
__________________
Porsche builds the 21st century 9146
so easy...even a Cayman can do it !
Old 05-28-2007, 09:09 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #6 (permalink)
 
Registered User
 
ELZ's930's Avatar
 
Join Date: Jan 2004
Location: "The Natural State"
Posts: 808
VDO makes a CHT gauge. The temp sensor is a copper washer which surrounds a spark plug and seats onto the cylinder. I have one and it matches exactly what my temp gun reads at the cylinder. I've used these on other engines and they have always read accurately.
__________________
the911den.com

Instagram / UberPorsche930
Old 05-29-2007, 06:38 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #7 (permalink)
Porsche Junky
 
mede8er's Avatar
 
Join Date: Nov 2004
Location: Salida, CO
Posts: 1,804
Garage
Yes...mine is a VDO with a copper lead...I'm guessing it broke in the past and was rerouted to the exhaust bolt...
__________________
1986 930 RUF equipped
Old 05-29-2007, 12:29 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #8 (permalink)
Registered User
 
ELZ's930's Avatar
 
Join Date: Jan 2004
Location: "The Natural State"
Posts: 808
I think it should be more centrally located between the intake and exhaust. Otherwise it will be skewed one way or the other.

Maybe you could get another lead, washer?

Good Luck,
__________________
the911den.com

Instagram / UberPorsche930

Last edited by ELZ's930; 05-30-2007 at 06:37 AM..
Old 05-29-2007, 12:47 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #9 (permalink)
Porsche Junky
 
mede8er's Avatar
 
Join Date: Nov 2004
Location: Salida, CO
Posts: 1,804
Garage
I've been meaning to pick up a temp gun anyways....now seems like a good time...Thanks Again!
__________________
1986 930 RUF equipped
Old 05-30-2007, 03:09 AM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #10 (permalink)
Porsche Junky
 
mede8er's Avatar
 
Join Date: Nov 2004
Location: Salida, CO
Posts: 1,804
Garage
For future searchers info:

Picked up a heat gun.....cyl head temps were reading 225-265 while VDO guage was reading 450.....
__________________
1986 930 RUF equipped
Old 05-31-2007, 12:09 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #11 (permalink)
Registered User
 
ELZ's930's Avatar
 
Join Date: Jan 2004
Location: "The Natural State"
Posts: 808
mede8er,

Did you check the exhaust side and the intake side? Just for fun I would be interested in knowing your exhaust temp, and turbo temp at idle with a warm car. Just for comparisons sake. It is fun to check the temps of the intercooler in and out as well!

Ok sorry, I get too carried away with this temp gun
__________________
the911den.com

Instagram / UberPorsche930
Old 05-31-2007, 12:30 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #12 (permalink)
Porsche Junky
 
mede8er's Avatar
 
Join Date: Nov 2004
Location: Salida, CO
Posts: 1,804
Garage
Hehhehheh...yeah, I was shootin that thing all over...but I'm leaving for DC in the morning and won't be back till next weekend...

I'll put a log book together then...
__________________
1986 930 RUF equipped
Old 05-31-2007, 02:20 PM
  Pelican Parts Catalog | Tech Articles | Promos & Specials    Reply With Quote #13 (permalink)
Reply

Thread Tools
Rate This Thread
Rate This Thread:

 


All times are GMT -8. The time now is 03:34 PM.


 
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page
 

DTO Garage Plus vBulletin Plugins by Drive Thru Online, Inc.