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I've always been curious if a second EWP in series would resolve this issue? I have the large Meziere EWP on my car.
I know there is a PWM bmw electric pump out there that is extremely powerful. Might be what we need to start switching to if the Mezieres can't keep up.
Pierburg CWA400 is the model. It came on many BMW's and can probably be found cheap.
I tried to post a facebook link but I'm not able to on the forum. There's a video of the thing running it is really insanely powerful.
What MPH at the track? More speed might equate to more airflow. If the engine compartment is snug, getting air OUT of engine compartment is a challenge. Looks like you have an extractor in the hood, which is good. Can you add vents behind the wheels to help exhaust more hot air?
What about two Davies Craig pumps?They're remote mount, which would solve the clearance issue up front and they would flow more than the current ewp. You could run one per bank.
What about two Davies Craig pumps?They're remote mount, which would solve the clearance issue up front and they would flow more than the current ewp. You could run one per bank.
And they don't pull a lot of amps. I ran a single one on a rear mount radiator setup and it worked well.
I have maximized the entire coolant set up. Twin fans, increasing opening by 24 Sq In. Completely sealed intake shroud, larger oil cooler, larger upper hose (-16 to 1.25" Hose this should help a lot) The radiator air exit is fairly open because it is a tube chassis car and therefore the air flows thru the large opening on the passenger side to the rear of the car. It is a flat bottom car from splitter to the rear axle.
I will test the setup later in the month but if it is still to hot I may have to go to a dual EWP setup The one I have and a remote one pulling the water from the return line and pushing into the radiator.
Terry
We routinely make 405-410rwhp with a stock LS3 430hp engine with headers and a tune in RX-7 swaps. They are under rated for sure. Glad you are getting it dialed in!
I need to get my car back on track (416/LS7 small bore heads) FD RX-7 (street oriented track car). 2900lbs with a/c and 315/335 tires 50/50 weight balance full 18 gal fuel.
I tested the car on Tuesday (only 72 Deg ambient) 187 degree water and 227 degree oil
So it seams maximizing the coolant system and adding more oil cooling has done the trick.
The true test will be next summer on a 90 deg day.
Result: You can run a Electric Water Pump setup on a road race car if all the plumbing and oil cooling is done correctly.
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not a bad Thursday night 
