lol.Įdit 2 : Just my personal opinion here and only going by my own experience from fitting these to numerous CRD's now. Going by their description it would be for the single stage solenoid setup, like a Triton. That is how it is done when NOT using a needle valve.Įdit : I just looked at the link the OP supplied. If you want to continue to not use a needle valve I would be putting the vacuum supply back onto the end port of the solenoid, the middle port to the Dawes and the inner port to the air resonator box. So the way you have done it you have no control on spool up rate and you wont be getting the right performance out of your ride. You still can do what you have done, but obviously the ECU is designed differently to the other vehicles and is designed for the three ports. Using a needle valve in replace of the third port to control the "vacuum bleed" takes away the final control of the vacuum solenoid. The solenoid still relies on the "bleed port", the third port on the solenoid which goes to the air resonator box, to let some of the vacuum pressure in and out to control the spool up rate. In this case you do completely by pass the solenoid. One line in from the pump and one line out to the turbo. Just about every other car I have seen, Triton, Ranger and Navara, with the VNT turbo it only has a single stage solenoid, two ports, supply and delivery to the turbo. It controls boost and spool up rate, one port for vacuum supply, the other two for max boost and spool up rate, if you want to call it that. The vacuum solenoid on the patrols is a two stage set up, three ports. Originally it was between the control solenoid and turbo. Would this be any different to the older style Dawes valve as the instructions say to just bypass the solenoid.Īlso, where should the dampener be placed? Between the turbo and valve (currently set this way) or the valve and vacuum pump? Or does it not matter? Here is a link to an earlier version of the HPD Boost controller. The question I have is that most of the diagrams I see still keep the factory vacuum solenoid or use a needle valve so are these rally needed? On my car its just the Dawes valve connected between the vacuum pump and turbo. Around town its 10-12psi or lower when not under load. It would spike up to 16-17psi and then settle down to 14psi on the highway. I drove it around town as well on the open road (110 km) and boost was linear. This seems to be working fine on the patrol. Two separate suppliers advised that I just isolate the solenoid and hook up the Dawes valve directly to the vacuum pump and then to the turbo. I have just installed a HPD Dawes valve to my CRD Patrol to stop the over boosting caused by the new 3 inch exhaust.
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