Posted By: flatiron
Do you have a restrictor in your thermostat housing? - 07/19/10 01:37 AM
I am running a Moroso ele water pump on my 360. So I do not have a thermostat in. I was told the water is cycling thru to fast and I need to make a restrictor. Any input on this?
Posted By: topside
Re: Do you have a restrictor in your thermostat housing? - 07/19/10 01:40 AM
Yup, one's in mine - 368" SB, Moroso pump - don't recall the hole size though.
Posted By: BobR
Re: Do you have a restrictor in your thermostat housing? - 07/19/10 01:43 AM
Who told you that? Restrictors are used to control cooling by limiting coolant circulation. Under no circumstances will adding a restrictor ever result in more efficient heat transfer.
Posted By: flatiron
Re: Do you have a restrictor in your thermostat housing? - 07/19/10 01:43 AM
Did it help with your heating problems? How was it made is it round and fit were the thermostat goes or is the same shape as the bottom of your housing?
Posted By: abodiesonly1
Re: Do you have a restrictor in your thermostat housing? - 07/19/10 01:45 AM
I run a t-stat with the guts cut out.
Posted By: flatiron
Re: Do you have a restrictor in your thermostat housing? - 07/19/10 01:55 AM
Did it seem to make a difference?
Posted By: topside
Re: Do you have a restrictor in your thermostat housing? - 07/19/10 02:10 AM
Mine's a round disk with a hole in it; was in the car when I got it, and haven't messed with it yet.
The idea is to keep the water in the radiator longer so it rejects more heat; obviously the other side of the equation is keeping the water in the motor too long and having more heat to reject.
With iron heads, my car ran quickest/fastest with 120-degree water, (warm oil); I honestly don't know what the current aluminum heads on it want, but I haven't experimented with that yet.
Posted By: instigator
Re: Do you have a restrictor in your thermostat housing? - 07/19/10 04:19 PM
The biggest reason I can see to run a restrictor would be to keep the amp draw down on the pump..a pump like this will pull more amps with more flow...wide open may electrically stress the pump motor.
Posted By: SmokeyBurnout 67
Re: Do you have a restrictor in your thermostat housing? - 07/20/10 04:14 AM
AGREED!- We run a gutted T-stat and it's perfect. We also run ours on the street and have raced with a 180 stat and it was no good for consistancy, then without a stat just to try, again no good- the water couldnt cool quick enough. I strongly suggest a gutted T-stat.
Kara
Posted By: Stroker Scamp
Re: Do you have a restrictor in your thermostat housing? - 07/20/10 05:00 AM
i run a 160 thermostat with just a 1/8" hole drilled in it, dont know if its right or wrong but it works for my set up, car hasnt got hot yet at the strip or street
Posted By: Quicksilver440
Re: Do you have a restrictor in your thermostat housing? - 07/20/10 07:44 AM
I ran a radiator shop for a few years...and fixed many a cooling problem.
A restrictor does not help cooling...at best you gain nothing. Think of it this way..Unrestricted, the water will flow through the radiator more times per hour...increasing cooling. Restricted, it goes through the rad less times per hour, reducing cooling. Yeah it might spend a bit longer time in the radiator, but thats nothing compared to the water flowing through the radiator several times more per hour.
Read this:
http://www.stewartcomponents.com/tech_tips/Tech_Tips_3.htm
Posted By: moparniac
Re: Do you have a restrictor in your thermostat housing? - 07/20/10 08:35 AM
"A common misconception is that if coolant flows too quickly through the system, that it will not have time to cool properly. However the cooling system is a closed loop, so if you are keeping the coolant in the radiator longer to allow it to cool, you are also allowing it to stay in the engine longer, which increases coolant temperatures. Coolant in the engine will actually boil away from critical heat areas within the cooling system if not forced through the cooling system at a sufficiently high velocity. This situation is a common cause of so-called "hot spots", which can lead to failures."
Isnt that what a tstat does anyway ....
Posted By: smokinwoody
Re: Do you have a restrictor in your thermostat housing? - 07/20/10 11:46 AM
no stat and stays at 145*..real secret is a large radiator preferably a dual pass with about 4,000+ CFM of air movement thru it....thats whats in the race car
my street car I use a 160* stat and it stays mostly in the 180-190* area...it has a crapola Be-Cool radiator that is to small for a blower engine..as soon as I get rich Im swapping it out for a dual pass and one of those Taurus 2 speed fans...those pull 4,000CFM and are so much cheaper than Spals which I have 4 on it already...sucks dont it...