What I'm reading is "when I hit the 4>5 shift (60-70 mph), the trans limps and the truck slows down"
2nd cp3 insight.
- Thread starter Maxhdcrew
- Start date
I have always had trouble understanding this and maybe some one can explain it. I would also like to put a twin cp3 kit on because I have an extra stock pump but keep hearing to go to a better single pump. With the twins its not going to give it any extra fuel than the vehicle is asking for right? Thanks Fred
Yet again nobody listens..... I'm building another motor..... I had no plan to do anything to the truck the way it is...... that was your ASSumptions as to why I asked a simple question about how the pumps work... so when my motor is done and I get to that point I'll have my questions answered, kind of. It's like a dance around the dam circus just to get a simple answer to a question. Not one time was anything brought up asking about tuning or anything else that you all have thrown out there like I needed to know, when in no way shape or form did I ask about it. You all always feel the need to shove your I'm smarter than everyone attitudes down everyone's throat. Every post I've read before I joined with a new guy asking questions ended up this exact way..... having info not related to his question rammed at him as he continues to ask the question and then everyone jumps on him because he doesn't just bow down and give in to your cult crew. Go back through the thread and show me where I asked about what tuning I should use, or what's better, or anything you do with what you all keep rambling about with efi. I know what it is , I don't need it at this point stop trying to make me change my mind. I'll get it when I need it and I know what and how it works. We use the same style of tuning on our race car..... I appreciate the answers I got to my question finally. It's like being back in high school with all the badgering and pointless banter about who's is bigger. Makes no sense that grown men act like this.... grown men trying to act like forum gangsters. Have a hard time in high school ? You can't prove much typing.
See that's all I was trying to figure out, seems like a legitimate question right? And not once has anyone explained how the 2 pumps actually work with one another. I don't want to hear just use this or use that I want to know how they work so I know why!
There is a controller that interfaces between the 2 cp3 pumps and spreads the fuel load equally between the pumps. Look up Fishtuning.com and they sell the controller you're looking for...
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OK, fair enough. I thought someone touched on how the pumps work earlier, but I guess not.
With two pumps, they each provide half the volume of fuel. They both end up at the same pressure, but the load is somewhat reduced. The controller causes both regulators to open the same amount.
I think all the confusion comes from your first post where it appears (or we all just ASSumed) you were building the motor that was in the truck based on you mixing your 2nd motor build plans with how the current motor runs.
And you are right that you never asked what tuning to use. I was just trying to get to the root of the problem it seemed you had, which was due to miscommunication. It is hard to get thinga across on the forums vs in person. I (and I suspect others) believed you were going to build the motor in your truck because it had problems once you got above 60 or so. So I wasn't trying to act smarter than you, I was trying to save you a lot of money you didn't need to spend. But it sounds like you want to go through the engine just for the sake of it, which is fine.
So hopefully that answers your question about dual CP3s sharing load, and sorry if you felt we were trying to induct you into the cult of EFILive
I just misunderstood what you were doing, and tried to save you some effort.
Sent from my FlashScan V2
With two pumps, they each provide half the volume of fuel. They both end up at the same pressure, but the load is somewhat reduced. The controller causes both regulators to open the same amount.
I think all the confusion comes from your first post where it appears (or we all just ASSumed) you were building the motor that was in the truck based on you mixing your 2nd motor build plans with how the current motor runs.
And you are right that you never asked what tuning to use. I was just trying to get to the root of the problem it seemed you had, which was due to miscommunication. It is hard to get thinga across on the forums vs in person. I (and I suspect others) believed you were going to build the motor in your truck because it had problems once you got above 60 or so. So I wasn't trying to act smarter than you, I was trying to save you a lot of money you didn't need to spend. But it sounds like you want to go through the engine just for the sake of it, which is fine.
So hopefully that answers your question about dual CP3s sharing load, and sorry if you felt we were trying to induct you into the cult of EFILive
I just misunderstood what you were doing, and tried to save you some effort.Sent from my FlashScan V2
Running two pumps does not decrease wear between them. They both still push the same mount of commanded psi. Your only gaining more volume to maintain pressure when you have a worn stock fuel system or larger than stock injectors.
You need to monitor desired rail pressure vs actual to know for a fact if you need something more in volume for fuel. Without monitoring that, it's a guessing game.
You can either run a second pump on your stock fuel system or find the weak points in the fuel system, address them and get them to hold rail pressure.
Adding that second pump won't hurt your fuel system but certainly will supply the fuel to hurt the lower end once the 475 goes on top till you get the build engine in
You need to monitor desired rail pressure vs actual to know for a fact if you need something more in volume for fuel. Without monitoring that, it's a guessing game.
You can either run a second pump on your stock fuel system or find the weak points in the fuel system, address them and get them to hold rail pressure.
Adding that second pump won't hurt your fuel system but certainly will supply the fuel to hurt the lower end once the 475 goes on top till you get the build engine in
OK I got ya. Makes sense I want sure how they actually handled the load. Whether the second picked up where the first falls short or if they split the load. I'm actually heading to my pops machine shop right now to get started on my block. Like I stated earlier, I'm building another motor which I plan to over build for future plans and will be going into something smaller (single cab short bed something possibly a car) to play with. I'm just throwing a 475 on my truck for towing and egt control and it's cheap and easy. I do appreciate the info greatly.
OK, fair enough. I thought someone touched on how the pumps work earlier, but I guess not.
With two pumps, they each provide half the volume of fuel. They both end up at the same pressure, but the load is somewhat reduced. The controller causes both regulators to open the same amount.
I think all the confusion comes from your first post where it appears (or we all just ASSumed) you were building the motor that was in the truck based on you mixing your 2nd motor build plans with how the current motor runs.
And you are right that you never asked what tuning to use. I was just trying to get to the root of the problem it seemed you had, which was due to miscommunication. It is hard to get thinga across on the forums vs in person. I (and I suspect others) believed you were going to build the motor in your truck because it had problems once you got above 60 or so. So I wasn't trying to act smarter than you, I was trying to save you a lot of money you didn't need to spend. But it sounds like you want to go through the engine just for the sake of it, which is fine.
So hopefully that answers your question about dual CP3s sharing load, and sorry if you felt we were trying to induct you into the cult of EFILive
Sent from my FlashScan V2
No hard feelings, you all are very smart and know what's going on and I respect that. It was probably my fault I used the problem with my truck as an example that I didn't word right. I apologize for that. Thank you for the info, as far as my trans I keep the go pedal off the floor and get pretty good mileage with the 225 tune. When I do play I generally don't spin it over 3k and the top of 3rd I lift and be easy. At the price they want for these Trans I've been gathering information to do a rebuild myself when I come across a core. I've put about 10k on this trans at the 225 and about 1k on the 6th tune. I keep the filters changed and no 4-5 5-4 shifts and it's been holding strong , fluid has always been clean. It won't last forever but if I'm easy on it it should be OK for a while I HOPE! thanks again. Well while I'm here what a average price for the labor to put a little in these. There's no qualified shops around me that know the Allison . When I've called and talked to a lot of them they say things that don't even pertain to the Allison or the upgrades that come in kits like the g-max or you can just tell they don't know how the Allison works all the while there talking like they know and have done tons of them thinking I don't know anything about them. So that kind of worries me, leaving something that expensive and important in there hands.
It sounds like you know how to keep the Allison alive, so it should last a while. When I first got my truck, I did the same as you, and I got about 50k miles before it started limping, so hopefully you get a while out of yours too.
The Allison can be tricky to build right, and there are only a few really good shops. It is possible to do yourself, but there are a lot of little pitfalls that can hose the whole thing. You'll want to do a lot of reading before you go for it, but most of the information you need is on this forum and online. I love to do things myself (my brother and I built my motor in his shop), but I paid a shop to do the Allison. Just too much risk for me. That being said, there are a handful of members on here who have successfully built their own Allison (and a handful who failed at it too).
Sent from my FlashScan V2
no problem. we are a tight nit group and most of us are on the same track of mind of how things done. sometimes its forgotten there is more than 1 way to skin a cat and we also dont know you that well..... yet
. Not to metion, being on that one track mind may cause you to overlook new ideas. The PPE is old tech and there are better ways to get power now a days, even with just an autocal from say, ATP. BUT that doesnt mean the PPE wont get it done. I believe PPE will send updated tunes for your setup through certain PPE hand helds but dont quote me on it. its been a few years since i remember reading something like that. Also remember, if you run a bigger than stock intake tube off the 475, you will get a MAF code and it will need rescaling. Something the PPE may or may not take care of for you.