quote:Originally posted by ZR1 Pantera:
The Theory about hot spots and uneven warm up is very interesting.
The way people talk about it, they make it seem like the heads are going to get a hot spot and crack. It sounds like if you run a non-bypass water pump, that only horrific things will happen to the motor.
While the uneven warm up MAY be true, in the real world, there in NO NOTICEABLE warmup or performance difference with running a non-bypass water pump.
I ran one for YEARS without noticing any issue. NONE of the doom and gloom issues happened in my case with a dreaded non-bypass water pump.
However, the Cleveland design works well the way the engineers intended. So there is no reason not to run the Cleveland design. Unless of course, you want to run a non-Cleavland T-Stat or a non-bypass water pump.
My only point is this, a non-bypass water pump works fine. Nothing bad is going to happen if you run one...
The uneveness of the warmup and the pulsation from very high to very low in a regular car probably would just be accepted as normal.
In tha Pantera, it makes it uncomfortable to drive the car where you are taking it on faith that it will not overheat.
I ran the non bypass Wieand pump and a regular thermostat for years in a Mustang although if memory serves me right, maybe it was a Cleveland thermostat?
There with a normal distance to the radiator I noticed no issues at all. The car warmed up fast. Held a steady temp.
In the Pantera, the temps pulsated like I was going to have to call the Nuclear Power Commission, sound red alert and give the order to abandon ship.
I didn't need that additional stress.
To each his own.