Message text written by Robert Snyder
>Recently, on some advice, I ran a T from my coolant
hoses which go through the intake and additionally
routed coolant through my Weber DGV carbs. I have the
carbs on for several years, and a mechanic friend
noticed that I hadn't routed coolant through them and
suggested that I should to help atomize the fuel.
My car always ran right in the range of the two small
dots on the temp gauge (I have a '70) and now it runs
about a quarter of an inch hotter on the temp gauge.
I haven't had a chance to measure degrees, but it must
be 10 or 15 degrees hotter. This is perplexing since
I would have thought that additional paths for the
coolant to run would have possibly cooled rather than
raised the temp of coolant. I can only think that
perhaps the water pump doesn't like the additional
path and the flow of the coolant has been slowed
through the system.
I wanted to take the car to TRF this weekend, but this
slight hotter running concerns me. I am going to
change back to stock tomorrow. Any ideas? or has
anyone routed coolant through their DGV's with no
problems?
<
Bob, I have never run these carbs on a TR6 but I had the Holley equivalent
on a Mustang years ago and the hot water path through the manifold is to
reduce fuel precipitation at low speeds in cool weather. I suggest you
remove this connection and go to TRF. When you get back I suggest you
reconnect it but put some sort of restriction in the circuit. The Stock
TR6 manifold has the same thing but if you look at the Y-pipe you will see
a baffle with a small hole for the return of this coolant. The coolant
flow is from the head (just before the thermostat) back to the water pump
inlet bypassing the radiator and w ithout the restriction, too much coolant
is bypassing the radiator.
Have fun and wish I was going.
Dave
71 TR6
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