Temp sending unit for AFR heads
Thread Starter
Drifting
Joined: Aug 2005
Posts: 1,289
Likes: 3
From: East Waterboro Maine
Temp sending unit for AFR heads
My stock 71 BB motor had a temperature sensor that screwed into a port on one of the cylinder heads. I've since updated to AFR 305 heads but there's no provision for a temp sensor. Any ideas or suggestions on how to approach this?
Le Mans Master
Joined: Jun 2002
Posts: 8,339
Likes: 24
From: I can walk to MA
How about a later model thermostat housing:
http://NHvette.com/ftp/in/spreader_bar_01.jpg
Of course, this gives the temp of coolant entering the radiator ... not the temp in the head.
A faulty thermostat could make for incorrect readings. I use this to switch the electric fan.
If you have a plug in the coolant passage of the intake ... that might be a better location.
http://NHvette.com/ftp/in/spreader_bar_01.jpg
Of course, this gives the temp of coolant entering the radiator ... not the temp in the head.
A faulty thermostat could make for incorrect readings. I use this to switch the electric fan.
If you have a plug in the coolant passage of the intake ... that might be a better location.
Last edited by NHvette; Aug 14, 2006 at 01:37 PM.
Thread Starter
Drifting
Joined: Aug 2005
Posts: 1,289
Likes: 3
From: East Waterboro Maine
Originally Posted by NHvette
How about a later model thermostat housing:
http://NHvette.com/ftp/in/spreader_bar_01.jpg
Of course, this gives the temp of coolant entering the radiator ... not the temp in the head.
A faulty thermostat could make for incorrect readings. I use this to switch the electric fan.
If you have a plug in the coolant passage of the intake ... that might be a better location.
http://NHvette.com/ftp/in/spreader_bar_01.jpg
Of course, this gives the temp of coolant entering the radiator ... not the temp in the head.
A faulty thermostat could make for incorrect readings. I use this to switch the electric fan.
If you have a plug in the coolant passage of the intake ... that might be a better location.
I do have two ports on the intake that I could put a sensor in, but they are both in the very front of the intake and would be highly visible. I would like to avoid this if possible.
I know there are lots of people running AFR heads who have worked around this issue before. I wonder if it's possible to have a hole drilled and tapped somewhere in the head, although the thought of that is a bit
Race Director
Joined: Dec 1999
Posts: 19,610
Likes: 778
From: Forked River NJ
Originally Posted by Maine Vette
I know there are lots of people running AFR heads who have worked around this issue before. I wonder if it's possible to have a hole drilled and tapped somewhere in the head, although the thought of that is a bit
Instructor
Joined: Jan 2003
Posts: 244
Likes: 0
From: Thomson Illinois
My Brodix heads did not have the temp sender hole for my small block. I drilled and tapped myself. Simple procedure if the heads are off the engine. However, if you can have this done for $25 bucks, I would certainly go for it unless you are just looking for the experience. The tap will cost nearly that much.
KC
KC
Last edited by kdcollins; Aug 14, 2006 at 09:11 PM.
