Crossover line

[kdogg85]

IIRC, when an ADII and rr are used together, you turn the ADII wide open and let the rr set the pressure. I have a crossover and read fp there. Runs around 69 psi and drops to 65ish at wot. Yes the crossover is a waste, I put it in when the heads got back from the machine shop, I put a tee fitting in the middle and can do a rr if I feel the need or want.

If only around 25 psi of fuel was making to the back of the heads, the last 2 injectors would be dying left and right.

 

[Mdub707]

regulated return and a good healthy fuel pump

A brand new AD2 feeding the heads directly seems like it would be enough fuel, my buddy is getting similar readings to me. Seems like maybe the fuel pressure gauge is just too touchy. I don't know. I know others using the same setup with a different gauge and don't report these issues. We are both using ISSPRO EV2's.

So pretty much the injectors at the rear of the head are seeing very litle pressure no matter t the set up? How do you fix this?

I'm not entirely sure it's a "real issue" I find it hard to believe that's an accurate pressure.

IIRC, when an ADII and rr are used together, you turn the ADII wide open and let the rr set the pressure. I have a crossover and read fp there. Runs around 69 psi and drops to 65ish at wot. Yes the crossover is a waste, I put it in when the heads got back from the machine shop, I put a tee fitting in the middle and can do a rr if I feel the need or want.

If only around 25 psi of fuel was making to the back of the heads, the last 2 injectors would be dying left and right.

Exactly, and those injectors are just fine. I question the gauge.

 

[Mwilbur516]

So since the stock fuel pump has no way to adjust pressure, if you add a regulated return and its set too high, will you burn up the stock pump. I'm still on the fence over what to do with my truck. I would like to do the RR and leave the stock HFCM since I don't plan on anymore than 175/50's and a Pmax and that won't be for a while. Right now the truck is running the stock injectors and turbo, it's gonna stay that way till' I start loosing injectors or the turbo or I find a killer deal on a Pmax. Even if I bought the turbo tomorrow the stock sticks would have to suffice for a couple years or until they started to fail.

I've read so much good and bad about the ADII's. The cross over seems absolutely pointless. It just seems to me that the best/most reliable system (for something stock or slightly modified I.E. 175-190's and Pmax) is the stock pump with a RR and 6.4l banjo's. Am completely wrong or possibly on the right track?

 

[MorganY]

So since the stock fuel pump has no way to adjust pressure, if you add a regulated return and its set too high, will you burn up the stock pump. I'm still on the fence over what to do with my truck. I would like to do the RR and leave the stock HFCM since I don't plan on anymore than 175/50's and a Pmax and that won't be for a while. Right now the truck is running the stock injectors and turbo, it's gonna stay that way till' I start loosing injectors or the turbo or I find a killer deal on a Pmax. Even if I bought the turbo tomorrow the stock sticks would have to suffice for a couple years or until they started to fail.

I've read so much good and bad about the ADII's. The cross over seems absolutely pointless. It just seems to me that the best/most reliable system (for something stock or slightly modified I.E. 175-190's and Pmax) is the stock pump with a RR and 6.4l banjo's. Am completely wrong or possibly on the right track?

A 1000 with a RR. A fuel filter and water separator, Before the a1000.

Also, if you have never experience aftermarket injectors, I would never limit yourself..it's an addiction. I'm on my second set of aftermarket injectors. Only had 3000 miles on the first set (190s) before I pulled them out and got them up'd. I think others would agree.

 

[Mwilbur516]

A1000= Aeromotive1000?

 

[MorganY]

A1000= Aeromotive1000?

You are correct. I wish I did my setup that way. Would've been solid.

 

[Mwilbur516]

Just checked out the Aeromotive website and they don't have a drop in kit for the 6.0. That sucks. I guess you just have to put it together yourself.

As far as limiting myself with the injectors, I know what you're saying, but I also know that anything over say 190's will require more air than the Pmax is capable of. I also believe, and this is just my opinion, that when you start going bigger than say 190's you really start sacrificing reliability and the ability to tow heavy. I honestly think I would be perfectly happy never going bigger than 175's and a Pmax with a good tune.

 

[Pizza pig]

it will take me the same amount of time to install an a1000 setup as it would take me to install an AD2...

 

[AllanB]

So since the stock fuel pump has no way to adjust pressure, if you add a regulated return and its set too high, will you burn up the stock pump. I'm still on the fence over what to do with my truck. I would like to do the RR and leave the stock HFCM since I don't plan on anymore than 175/50's and a Pmax and that won't be for a while. Right now the truck is running the stock injectors and turbo, it's gonna stay that way till' I start loosing injectors or the turbo or I find a killer deal on a Pmax. Even if I bought the turbo tomorrow the stock sticks would have to suffice for a couple years or until they started to fail.

I've read so much good and bad about the ADII's. The cross over seems absolutely pointless. It just seems to me that the best/most reliable system (for something stock or slightly modified I.E. 175-190's and Pmax) is the stock pump with a RR and 6.4l banjo's. Am completely wrong or possibly on the right track?

I am not sure about the 175's but you can't run 190's off a stock fuel pump. At the price of injectors I wouldn't try it with. 175''s.

 

[MorganY]

Just checked out the Aeromotive website and they don't have a drop in kit for the 6.0. That sucks. I guess you just have to put it together yourself.

As far as limiting myself with the injectors, I know what you're saying, but I also know that anything over say 190's will require more air than the Pmax is capable of. I also believe, and this is just my opinion, that when you start going bigger than say 190's you really start sacrificing reliability and the ability to tow heavy. I honestly think I would be perfectly happy never going bigger than 175's and a Pmax with a good tune.

I ran a pmax and 190/75s and could do 9,000 lbs on Erics tow tune. What do you mean by reliability going down after you go past 190's?

 

[MorganY]

I am not sure about the 175's but you can't run 190's off a stock fuel pump. At the price of injectors I wouldn't try it with. 175''s.

On Erics tuning on stock injectors I was going down to 35psi on xtreme street on a stock fuel system. (1 year old stock pump)

 

[Pizza pig]

On Erics tuning on stock injectors I was going down to 35psi on xtreme street on a stock fuel system. (1 year old stock pump)

i still hold 50psi on 190's with tsds super panty droper and erics extreme race

 

[Mwilbur516]

I'm holding around 58psi on my stock pump running Vivian's Looney Wild.

As far as reliablity on bigger sticks, thats just what I've read. Maybe I'm wrong, thats why I'm asking. I will say that I won't be going bigger than 175's and a Pmax on this truck. I just want a fuel system that will stand up to that when the time comes. If an ADII will work reliably, I'm cool with that. As far as the Aeromotive system goes, I would rather buy something that is designed for the truck and is essentially plug and play vs. me trying to figure out how to design a fuel system. This is my first rodeo as far as diesel fuel systems go.

 

[MorganY]

I'm holding around 58psi on my stock pump running Vivian's Looney Wild.

As far as reliablity on bigger sticks, thats just what I've read. Maybe I'm wrong, thats why I'm asking. I will say that I won't be going bigger than 175's and a Pmax on this truck. I just want a fuel system that will stand up to that when the time comes. If an ADII will work reliably, I'm cool with that. As far as the Aeromotive system goes, I would rather buy something that is designed for the truck and is essentially plug and play vs. me trying to figure out how to design a fuel system. This is my first rodeo as far as diesel fuel systems go.

I would run a reg return on any aftermarket Injector, but I am paranoid of fuel starvation. You should be fine with a ad2 with 175/50's

 

[windrunner408]

I'm paranoid of fuel starvation as well, which is why I just cant justify running an AD2 or FASS unit that replaces the stock fuel pump over an Aeromotive A1000/Fuelab pump setup with my RR kit. I never hear of these setups taking a dump on the owner. Not saying they dont but I have not heard of any. Has anyone heard/experienced an Aeromotive A1000 with RR setup failing on them in a DD/towing application??

 

[MorganY]

I'm paranoid of fuel starvation as well, which is why I just cant justify running an AD2 or FASS unit that replaces the stock fuel pump over an Aeromotive A1000/Fuelab pump setup with my RR kit. I never hear of these setups taking a dump on the owner. Not saying they dont but I have not heard of any. Has anyone heard/experienced an Aeromotive A1000 with RR setup failing on them in a DD/towing application??

I wish I went that route but in the air dogs and rr defense, I believe many pump failures were caused by the regulator at the engine set higher than the air dog. I even did it my self. cost me $175 for a new pump. I learned my lesson.

As to Wilbur, you could be different than all of us, but once you try 175s, and you know there is a lot more fuel you can add before big oil is needed..I just can't see anyone with the ability on these forums to stop lol. but then again I am very young and still think my 6.0 and I are invincible.

 

[AllanB]

On Erics tuning on stock injectors I was going down to 35psi on xtreme street on a stock fuel system. (1 year old stock pump)

I also ran the exact setup your talking about. But that is with stock sticks. With 190's at 100% you won't make it out of the driveway with a stock fuel system. Just my experience e with it. Yours might be different.

 

[AllanB]

i still hold 50psi on 190's with tsds supertsxs panty droper and erics extreme race

Not sure what a tsds super panty dropper is. But it sounds interesting enough lol. Enlighten us.

 

[Pizza pig]

truck source diesel's super panty dropper... if you do a quick search you will find a good amount of information. Its a race tune.

 

[Mwilbur516]

As to Wilbur, you could be different than all of us, but once you try 175s, and you know there is a lot more fuel you can add before big oil is needed..I just can't see anyone with the ability on these forums to stop lol. but then again I am very young and still think my 6.0 and I are invincible.

I totally understand what you're saying. I also know how expensive it is to upgrade your injectors too. I'll be friggin' ecstatic if my truck makes 430rwhp+ on the dyno in February.