Ok so I have this airdog 150 pump and install kit. My question is what kind of pressure does the ve pump want? This airdog is the 12 valve model and puts out 30 psi. Will this be bad for the injection pump or is this just good fuel supply. I believe the stock second gen lift pump is 30 psi, and I see lots of 1st gen guys have second gen lift pumps. I am planing to do this install tomorrow, but want to make sure I dont need a regulator or other equiptment. I am doing all the upgrades to the max the first time round so I dont spend a ton of money in between. I got the twins setup in the works and plan on getting some pretty big edm's and wanted a good fuel supply. Any other guys run an airdog or fass system on a first gen? Thanks in advance guys!

 

Your gonna need a regulator set at about 17-20 or it will push the front seal out of the pump

 

Will I need just a pressure regulator, or a bypass regulator with a return line? Thanks for the reply!

 

i want to know the same things a fass is on my list of things in the far future but its still nice to know

 

I just got off the phone with the airdog tech support line. They are closed this time of night, as it is 11 pm there, but list a number to call on the recording. Turns out this number is the company owners cell phone! He was very happy to answer any questions and is great guy to talk to. He was up helping a buddy on his truck. Learned all sorts of stuff. Anyway, On monday he is going to ship me out some different springs to use with the pressure regulator inside the airdog unit itself to see which one works best and supplies the correct pressure. It is super easy to change the spring. I am going to be the test vehicle, as they are currently trying to put together a first gen kit, but have no test vehicle. This way I dont need to get an extra pressure regulator, just use the built in one. As soon as I get the right one in there, they will put that in their first gen kit. I will update to let you know what happens.

pulltilbroke, is 20 psi the max pressure then? I am just looking for a specific number to tune this to get it right for their kits. Thanks!

 

Its 20 ish but every IP is different you could pull the pump and machine it for a snap ring then you could run the 30 psi the airdog unit puts out

Either way keep us posted

BTW what did the Airdog unit cost

 

I got it locally for $400. The dealer sold it to me for below cost cus he has way too many of them. They would normally be around $450ish from a local dealer.

 

Use a bypass regulator after the filter or your pressure at the VE will drop under load.

Sounds like it will be a good setup if you install it with the 30 psi spring and a bypass regulator. Otherwise you will be no further ahead than if you put on a piston lift pump.

 

X2 What he said, Bypass regulator with a return line and keep the pump set where it is. Don't back off on the pump.

 

Just a comment ---

When you start asking for full power, esp at higher rpms, won't you cause a drop in the fuel pressure at the IP ??
Shouldn't you have a bypass regulator that can reference boost to keep pressure at 17 - 19 psi at the IP under no-load and full-load ???

Yes, it will cost a little more but I think it would provide more reliable fueling...
That's my thinking...

Shoot me down if I'm wrong -- or if it's overkill.

 

Where can i get a bypass regulator for a decent price? All the ones I looked at have too small inlet/outlet, and none i found were rated to work with diesel fuel. I even called Summit, Jegs and couple of diesel companies, and they had none. I like the idea of the extra regulator post filter, but just cant find one. Thanks for the input guys!

 

No need for a boost referencing regulator when the base psi is at a near risky psi for a stock IP with no seal retainer. With a bypas regulator the psi leaving the regulator is always what it was preset or tuned to. If you set it at 15psi and have a 1:1 ratio boost reference then you will be at 30psi at 15psi of boost. Thus blowing the seal more than likley.

Try ebay searching aeromotive bypass regulator. They will handle diesel guaranteed!

 

I'm using a unit similar to this one.

http://www.vulcanperformance.com/ser...gulator/Detail

 

I am not so sure you need a bypass regulator. I just became an Airdog dealer so have only sold a few kits and am not completely familiar with them yet. Mine isnt getting installed for another couple weeks but the ones that have been installed on other truck keep a constant pressure. My buddies truck finally drops 2psi at 120mph from a standing WOT run. The Airdog 150 systems have a return line so I am pretty sure they are designed to maintain constant psi regardless of consuption at the pump. I would call tech again to confirm but I am almost positive with the looping system and built in regulator you are already over kill. Just change the spring for the pressure you want (or install the snap ring in injection pump and leave it at 30psi) and enjoy.

 

Also you will no longer be using the stock fuel filter and personally I will not be using the fuel heater either so you dont have to worry about those items dropping your fuel pressure or flow. You will also need an adapter(not sure the actual size) to run your 1/2" supply line into the injection pump. My pump has been machined to allow a 1/2" supply right into the pump inlet. Either way the only thing that should be between the Airdog 150 and your IP is the 1/2" supply line.