i have a 400 SBC in my camaro and i was wondering if i can T off the lower pass. side sensor location so i can run both knock and fan temp sensor off the same location?

 

If the knock sensor is not directly attached to the case, it will give erroneous readings.

You might consider a 'T' in the intake crossover instead of the case drain holes.

 

Yeah that would probably be more wise of me to do that. or maybe i can move my CTS to the front of my HSR and get an adaptor to run the other sensor at that spot or vice versa.

 

The knock sensor needs to be where it belongs; in the block, where it can hear knocks.

The CTS needs to be where it belongs; in the coolant stream, where it can measure what it's supposed to measure, which is coolant temp. Not cast-iron temp.

Put the KS in the coolant drain hole in the block; and the CTS in either the intake, or the water outlet (thermostat housing) so that each can do its job properly.

The Stealth Ram has enough holes, there should be no problem at all getting all your coolant things in there. Fan switch and gauge sensors go in the heads, where they belong (since they're supposed to measure cast-iron temps); you may need some one of these holes for the heater hose; so you should have a couple of choices.

 

I don't know when they started putting a temp/switch port on radiators. I had to plug the one on my 88' because I wasn't using it.

 

I think that is where some applications had a coolant level sensor...

 

Right, the one in the radiator is the coolant level sensor; and it's on the cold side which makes that location totally useless for any of the engine's temp sensors since it would be immersed in coolant that has just returned from the radiator. Not a very useful temp to be measuring, certainly not related in any way to the parameters that the ECM needs in order to get the right fuel & timing curves.

 

Yes, not a good place to put any kind of temperature sensor.

There are coolant drain holes on both sides of the block, you can use the one on the drivers side for the fan switch. I know there is one because I checked, well there is on both my SBC 350, and my Motown 388, don't see why the 400 block wouldn't have them.

 

Well, im pretty sure i looked on the opposite side for the coolant port. but didnt see it, ill look again tomorrow. if it is ill have to extend the wire to the otherside.

 

Dont' bother with a knock sensor on a 400. There is no proper KS for the harmonics of the 400 block. You will only get erroneous readings and false knocks.

 

Iv been running it, i havnt had a problem yet