Amazon came to the rescue again and we found this GM Genuine Part windshield washer anti-siphon valve that will fix our problem. If we were to do it again, we found some Y fittings with an anti-siphon valve built in, this would have enabled us to put the valve right next to the nozzles which would have been even better but we were too lazy to take off our bumper again!
Here is the checkvalve. It is not directional, more of a pop-off residual pressure type valve than a check valve. We discovered this purely by accident when trying to put it in. We noticed there was no flow direction arrow so we tried to install it both ways discovering it worked either way. We think this resisdual pressure valve might work even better.
We replaced our hose coupler fitting the the valve. Idealy it should be lower and closer to the nozzles but we were lazy and didnt want to take the bumper off again!
The valve worked great and nearly stopped the dibbling, reducing it down to a few drops. If we had been using our head and installed them right at the nozzles, there would be no dribbling at all. Now the pump primed instantly and started spraying water right away with no delay. Water is the ideal liquid to spray on the intercooler and radiator. It has a specific heat of 4 Kj per Kg plus being non toxic and non flamable with no residue. The only common liquid that works better, having a higher specific heat under ambient condtions is amonia which is highly reactive and toxic!
We filled up the intercooler sprayer water tank which is located on the right side of the truck. It is pretty large and holds at least a gallon of water, this is good for a lot of shots on the intercooler and radiator.
So here is a way to restore some of your OEM functionality and gain a nice bit of cooling on those hot track days and even make a bit more power in an easy few hours with a bit of work and a few bucks with Amazon!
5 comments
so i have a GRB rally car and my intercooler spray is connected to an indicator relay so when it is activated, it sprays intermittently….could be something to think abot
I wonder if the spray pattern as well as atomization matters? The picture shows a rather concentrated stream into the FMIC. Does a finer mist mean more surface area, and more effective cooling?
Probably doesn’t matter a lot at speed, we wanted the spray to go through the IC and hit the radiator too. Mostly chose those nozzles because ease of install too.
any proof this actually works? wouldn’t it be better to just use water injection?
The factory uses this system, this is just re-enabling it for a front mount IC instead of the OEM top mount. The WRC cars used it so the factory added it to the production cars. Water injection is something totally different