AirDog & Stage 2 CP3 works perfect...no drop in psi

[driverno8]

For those that have wondered how the AirDog and a Stage 2 CP3 would work we now know. I had 0 (zero) pressure drop at WOT. Both on the street and the dyno. Did 604hp this morning and had someone watch the FP gauge. FP stayed at 19psi no matter what I did. No matter what I asked from it. Nothing. Small little hickup when the peddle hits the floor then back to 19psi. We even clamped off the return line and it pumped the pressure well past the 30psi mark on my gauge. That did absolutly nothing for my hp. We're talking the standard AirDog with their optional hp motor. No funny things with the spring, no trick custom parts, nothing. Off the shelf AirDog. I'm not sure if I'm the only one out there running an AirDog and a modded CP3. I've done a lot of reading on sites trying to find the answer about these two products working together. And have never been able to find the answer. So I'm guessing I'm the only one. I just wanted you guys to know that I just don't see why you need some 2000gph pump and 6000psi to make a modded CP3 work. Let the bashing begin.

 

[jwilliams3]

FP stayed at 19psi no matter what I did. No matter what I asked from it. Nothing. Small little hickup when the peddle hits the floor then back to 19psi. We even clamped off the return line and it pumped the pressure well past the 30psi mark on my gauge. That did absolutly nothing for my hp. We're talking the standard AirDog with their optional hp motor

I guess I didnt see your post when you asked about the modded CP3 and airdog. I would have told you to do it but I also probably would have been bashed since the AirDog and FASS are no longer the flavor of the month fuel system. Although I still think the FASS is the king (even if I dont care for some of their service policies).



The modded pumps do not "need" the high pressure fuel to survive or perform well. But the pumps are suppose to perform better with a higher inlet pressure.



My experience with the pump pressures:

I am at over 30psi at the inlet (now) and I cant tell a difference from the 12psi I used to run :-laf (and I think its been established that my trucks runs good)



Basically I now feel that having a good positive pressure at the inlet and a good high volume pump is all one needs. No fancy doo dads... .



I am glad for one that you posted about this... .



PS... A second CP3 couldnt hurt us either! :-laf

 

[driverno8]

Looks like no one wants to admit it works.

 

[jwilliams3]

It goes against the popular opinion that is thought of to be correct... . People dont like being wrong.

 

[Diesel Power]

the more psi you feed the cp3 the easyer it is to make hp, only because of more lubrication and less work the cp3 has to do to get as much fuel as it needs. this has been true on many trucks. mine, floor-it diesel, industrial injection, and the list goes on. on my part the biggest difference was throttle responce and how soon the power came on. i have heard of people running as high as 100psi and seeing over 40hp from that alone, the rule is for every 15psi you get around 10 more hp, not a lot, but... ... ... ... ...

 

[steved]

Looks like no one wants to admit it works.

I can tell by the seat of the pants that running more pressure to a stock CP3 makes it feel better... I started out running 23-25psi with the FASS... it definately ran "better" than at 15psi I set it at currently... I also got more mpg running the higher pressure...



steved

 

[jwilliams3]

This thread is not about seat of the pants or rule of thumb stuff.



He dynoed his truck which is a scientific device and on this truck there was no improvement. The proof is in the numbers.



What is there to argue about?

 

[steved]

This thread is not about seat of the pants or rule of thumb stuff.



He dynoed his truck which is a scientific device and on this truck there was no improvement. The proof is in the numbers.



What is there to argue about?

Not arguing, just pointing out that increasing pressure does affect the way it runs, probably not in overall HP, but it does make a difference that you can definately tell seat-of-pants... yes, he proved that it doesn't affect HP junping from 19 to 30psi... but that doesn't prove/disprove that increasing pressure doen't make the CTD "happier" as noted above.



steved

 

[driverno8]

Remember I'm running a modded stage 2 CP3 by Floor-it. No seat of the pants difference at all by raising pressure. No gain on the dyno by raising pressure. No gain driving it down the street by raising pressure. Nothing. Yes, I gained hp by adding the CP3 (62hp) but gained absolutly nothing by upping the pressure. It's a sales pitch. The standard AirDog is rated at 100gph. If adding more volume (200gph fass) and raising the pressure is gaining people something and I'm gaining nothing with a pump that doesn't drop FP no matter what's asked of it, it shows you need a pump that works, not a bigger one with more pressure.

 

[Tomeygun]

The standard AirDog is rated at 100gph.

Heck I pulled my 150gph pump down to 13psi sustained...

Really makes you wonder about these pump ratings

 

[WCounts]

I'm running a Stage I from Floor It and a Air Dog along with a bypass regulator. I tryed over 30 psi on the dyno with the pressure only dropping 1 psi. The Air Dog uses 1/2" hoses and may flow more fuel than a smaller hose. I just run 25 psi now and still make good hp.

 

[Diesel Power]

i will run one dyno with 27 or so then i will run another @ 40-45, that should show us a difference, when i am at 40 psi i can draw it down to around 30.

 

[driverno8]

Heck I pulled my 150gph pump down to 13psi sustained

That's what I'm saying. I maintained 19psi no matter what I did. Even adding more than double the pressure did absolutly nothing for me.

Really makes you wonder about these pump ratings

I totally agree with you.

 

[WCounts]

i will run one dyno with 27 or so then i will run another @ 40-45, that should show us a difference, when i am at 40 psi i can draw it down to around 30.

If your pump will only hold 30 psi turning the pressure up will not get you more flow.

 

[driverno8]

i will run one dyno with 27 or so then i will run another @ 40-45, that should show us a difference, when i am at 40 psi i can draw it down to around 30.

You're saying it exactly. What good is your pump if you're losing 10psi when you get on it? With the AirDog we're not losing ANY pressure when we get on it.

 

[Diesel Power]

You're saying it exactly. What good is your pump if you're losing 10psi when you get on it? With the AirDog we're not losing ANY pressure when we get on it.

thats great for you, but the more programming i add to the truck the more psi drops---following demand, as demand is bumped up, fuel psi drops. at least this i what i have seen. it is not going to be long where we will need a pusher pump for our pusher pump... ... ... ... ... :-laf

 

[driverno8]

I have WAY more fuel then needed: TST, Smarty, EZ, 90hp injectors & a Stage 2 CP3.

 

[HeberRam]

Whatever!

I have WAY more fuel then needed: TST, Smarty, EZ, 90hp injectors & a Stage 2 CP3.

Your whole so call "test" and therory lacks more testing of different trucks and configurations, before you can make a statement of fact. Because you determined and found in your "test" there was no difference in the amount of HP changed due to the amount of pressure on your truck does not mean this applies as a rule to all of the rest of us? You claimed you made 604 hp, good for you. However, there are a lot more of us out here including myself that make a lot more Hp on D/F then you currently that have a different conclusion.



I believe Diesel Power said it best: "thats great for you, but the more programming i add to the truck the more psi drops---following demand, as demand is bumped up, fuel psi drops. at least this i what i have seen. it is not going to be long where we will need a pusher pump for our pusher pump... ... ... ... ...

 

[steved]

Remember I'm running a modded stage 2 CP3 by Floor-it. No seat of the pants difference at all by raising pressure. No gain on the dyno by raising pressure. No gain driving it down the street by raising pressure. Nothing. Yes, I gained hp by adding the CP3 (62hp) but gained absolutly nothing by upping the pressure. It's a sales pitch. The standard AirDog is rated at 100gph. If adding more volume (200gph fass) and raising the pressure is gaining people something and I'm gaining nothing with a pump that doesn't drop FP no matter what's asked of it, it shows you need a pump that works, not a bigger one with more pressure.

And while you're testing a modded CP3, a completely stock truck might show benefits of jumping from a questionable 10psi (or less) to mid 20s... I know mine did... again, nothing scientific, but I think there are more variables than you have toyed with... I mean, a jump in mpg just adding pressure indicates to me a significant change...



The only thing you really proved is either the Airdog is more than capable of flowing the amount of fuel you need; OR that you're not using the amount of fuel you think you actually are... there are always other ways to discuss a change...



steved

 

[Tomeygun]

Did 604hp this morning and had someone watch the FP gauge. FP stayed at 19psi no matter what I did. No matter what I asked from it. Nothing. Small little hickup when the peddle hits the floor then back to 19psi.

BTW - WHat brand dyno? not that one is better than another, but I would assume a load dyno, correct?



Better question would be whats your FP do when on the street?