h2oskibumz
09-08-2008, 05:54 PM
Gang, forgive my naiveté, if any of this is plain stupid, I'm SURE you'll let me know! I am looking for thoughts/opinions on a low budget fuel delivery upgrade.
Let me start by saying I have no plans to race, pull, or really "turn up" the truck (much) but I started out wanting to improve fuel quality via additional filtration, and ultimately am thinking I'll go with a mild tow tune w/ EFILive to improve perfromance while towing (since that's about all I do with this truck!)I know that either Guy Trip's basic tow tune or something Nick has to offer is going to be the major change I envision.
So, I started out by adding Aux filters on the frame rail per Saratoga's write up here and/or the DP. I used a 3244 (16 micron w/ water drain) and a 3674 (2 micron) from:
http://www.fleetfilter.com/Store_ViewProducts.asp?Cat=68
I am very happy with the setup, however as I was putting it together, I was afraid that with 3 filters (16/2/OEM) I would be starving the CP3 for fuel.
This has proven to be the case, and I will run the truck out of fuel under either hard acceleration (pretty noticeable, it falls on its arse... er, face) or under heavy loads pulling a hill (not real noticeable, it just runs out of steam a bit earlier than it should.)
One solution is that I could go out and spend a load of cash on a high quality lift pump, but that is pretty much overkill for my needs.
I already have an in line fuel pump (GM# 25117340) which is for a 6.5. It is brand new in the box from a buddy who sold his truck.
I'm thinking that if I would put this on a pressure (Hobbs) switch to come on at about 10psi of boost, it would run only when necessary (hard acceleration or heavy loads) and do the trick.
2 questions, really:
1) Do the 6.5 trucks have/need a regulator? In other words, I'm looking for 4-7 psi of fuel pressure to kick in on demand (when boost reaches 10psi or higher.) I am NOT looking for 25 psi!!! I'm not sure what this 6.5 pump will deliver, unregulated.
2) Do you think this pump will flow (or rather PASS) enough fuel (when it is NOT running) to allow the truck to not starve in conditions under 10psi of boost? I could put a bypass, or I could use a switch that turns this pump on at 5psi or so.
I know that it is going to take some tinkering to make this work... I'm just hoping for some good opinions here to give me a place to start. There is a ton of knowledge here, and I don't want to reinvent the wheel if someone has already been down this road.
Does that make sense??
Let me start by saying I have no plans to race, pull, or really "turn up" the truck (much) but I started out wanting to improve fuel quality via additional filtration, and ultimately am thinking I'll go with a mild tow tune w/ EFILive to improve perfromance while towing (since that's about all I do with this truck!)I know that either Guy Trip's basic tow tune or something Nick has to offer is going to be the major change I envision.
So, I started out by adding Aux filters on the frame rail per Saratoga's write up here and/or the DP. I used a 3244 (16 micron w/ water drain) and a 3674 (2 micron) from:
http://www.fleetfilter.com/Store_ViewProducts.asp?Cat=68
I am very happy with the setup, however as I was putting it together, I was afraid that with 3 filters (16/2/OEM) I would be starving the CP3 for fuel.
This has proven to be the case, and I will run the truck out of fuel under either hard acceleration (pretty noticeable, it falls on its arse... er, face) or under heavy loads pulling a hill (not real noticeable, it just runs out of steam a bit earlier than it should.)
One solution is that I could go out and spend a load of cash on a high quality lift pump, but that is pretty much overkill for my needs.
I already have an in line fuel pump (GM# 25117340) which is for a 6.5. It is brand new in the box from a buddy who sold his truck.
I'm thinking that if I would put this on a pressure (Hobbs) switch to come on at about 10psi of boost, it would run only when necessary (hard acceleration or heavy loads) and do the trick.
2 questions, really:
1) Do the 6.5 trucks have/need a regulator? In other words, I'm looking for 4-7 psi of fuel pressure to kick in on demand (when boost reaches 10psi or higher.) I am NOT looking for 25 psi!!! I'm not sure what this 6.5 pump will deliver, unregulated.
2) Do you think this pump will flow (or rather PASS) enough fuel (when it is NOT running) to allow the truck to not starve in conditions under 10psi of boost? I could put a bypass, or I could use a switch that turns this pump on at 5psi or so.
I know that it is going to take some tinkering to make this work... I'm just hoping for some good opinions here to give me a place to start. There is a ton of knowledge here, and I don't want to reinvent the wheel if someone has already been down this road.
Does that make sense??