What pressure do people normally run on their intercooler dump valves? Mine failed open and am buying replacements from Teague. They are adjustable form 5-20 psi.

I never needed or used one. I always plumed a # 6 line in and a # 8 out. That way I never had a problem with to much pressure in the inner cooler. But if you are set on a pressure relief. I would shoot for 15 psi. But it depends on how you have it plumed.

I'm going to be adding intercoolers soon to my setup. Been doing a little research on plumbing them.

Keith Eickert says run dual -12 or -10 lines feeding, and exiting the intercooler.

Teague says, Single -12 inlet, dual -10 outlets. They now are offering end caps that upgrade from the 1/2NPT, to 3/4 NPT sizes. Apparently to get more water moving thru the core.

Whipple big boy FOAC, has dual -20 inlet and outlets!

I think the key is, moving lots of water thru them

SuperChiller should be fed through a force-fed pick-up installed through the hull or transom, through a sea strainer to filter debris, through the
SuperChiller, and then dumped overboard.
We recommend a -12AN (3/4") or -10AN (5/8") line from the pick-up, through the sea strainer, and into the SuperChiller, and two (2) -10AN (5/8") lines to dump overboard.
--
Water flow should be restricted at lower RPM otherwise the efficiency of the SuperChiller can cause the fuel to puddle resulting in rough idle. A
force-fed pickup only feeds water through the SuperChiller when the boat is moving up on plane.
--
Water pressure in the SuperChiller is required to achieve the heat transfer that creates the performance increase. It is important to maintain 15 to 20 PSI in the intercooler when the blower is making maximum boost. Never exceed 30 PSI or damage to the Superchiller and/or engine may occur--

Water pressure should be regulated by adjusting or trimming the water pickup to supply the recommended 15 to 20 PSI. On cetain high
performance or offshore applications where the boat leaves, and re-enters the water or exceeds higher speeds, it's recommended to install a
pressure relief valve to bleed off excessive pressure during re-entry, preventing pressure spikes from damaging the intercooler
. The pressure relief valve may be installed on the sea strainer or the opposing inlet side of the SuperChiller
TCM can supply a suitable pressure relief valve, ask for part
#SCI100PRV 1/2" OR SCI134PRV 3/4"

i have one -12 in line and two -10 out lines.i also have a pressure releif valve set at 40 lbs.

I double checked.. I ran a # 10 in & 12 out. I had a offshore pickup that feed motor & I used the drive to feed the innercooler. That way I didn't feed cold water to the innercooler until underway, and not pool fuel. You have to be careful if your not using a multi stage pump. You don't want to take too much water away from motor & headers. The Merc 600 & 700SCI only use a single stage water pump & take away water that is meant for the heat exchanger & headers... & they wonder why they have header failure...

^^^^^do you have a low water pickup in the lower?

The way I plumbed my whipple cooler there was no need for a thru hull pickup...especially with an IMCO lower. I added a T before the sea pump, off the T I used a check valve and ran that to the cooler. After the sea pump I again added a T, off the T I used a pressure relief valve (set at ~5psi) and yet another T back to the feed line of the whipple. It worked really well, when the throttle was cracked the relief valve opened and started feeding the chiller, once on plane the water pressure on the inlet hose of the sea pump would open the check valve and take over feeding the cooler. As far as a pressure relief I would just use larger outlets out the chiller. With an IMCO lower you would not believe the volume and pressure that can be reached. I will try to sketch a diagram today.

I was just reading online some specs on the belt driven sea pumps. I saw . With either 10 or 15psi (cant recall at moment) the pump was able to move 2,400 gallons per hour at something like 3500rpm. Ill see if i can find that info tonight

I have Super Chillers on my 575's. One -12 in and two -10's out fed by a through hull. I get about 7psi on the inlet side at 100mph

I wonder if anyones done any testing on intake temps with different volumes of water moving thru the core.

I notice teague sells "high flow" end caps for their superchillers now, that have 3/4NPT fittings, where the standard ones are 1/2 NPT