which fuel system upgrades? [Archive] - Diesel Place : Chevrolet and GMC Diesel Truck Forums

: which fuel system upgrades?


RJWesleyIII
08-09-2010, 08:57 PM
Ok, so Im going to do the shim kit to see if can get more fuel pressure. I never get any codes, just want to help it out as much as I can. What do you guys think about the cp3 inlet fitting, the ported fuel rail fitting, and the race fuel valve with the shim kit? Need some advice :) thanks guys
Rob

strokeamomma
08-21-2010, 06:28 PM
i am wondering the same thing i am going to upgrade to EFI Live and just got a lift pump and wondering which valves or shim kits i should get.( sorry not trying to hijack this post maybe just get ya a bump)

Robby Avery
08-21-2010, 07:23 PM
The race valve and the shim kit are good upgrades. The CP3 inlet fitting is a waste of time. The internals of the CP3 neck right back down after the inlet so it renders itself useless. JMO

RJWesleyIII
08-21-2010, 11:46 PM
well i got the shims in, ported fuel valve, and the inlet. I checked fuel pressure before the upgrades, just ran out of time tonight to check them after the upgrades. hopefully tomorrow i can check it out. ill post the results then.

VTtransam
08-24-2010, 09:49 AM
Any results on this yet??

Robby Avery
08-24-2010, 10:37 AM
Any results on this yet??


I cant really post for him but since he did the race valve and shim kit I'd imagine he's def noticing there is alil more fuel on tap and holding a lil more rail pressure. But there again you have to take into account every truck will be different and feel different with certian mods or upgrades:D;).

RJWesleyIII
08-24-2010, 08:39 PM
ok, so i just got back from logging my truck. My desired fuel pressure always goes to 26107, but Im not sure how to read the actual fuel pressure, but it goes to 200. am I logging right? What is MPA? before I did the upgrades, it only went to 182. So there is some improvement, and the seat of the pants feel definitely pulls harder on the top end. Ive also noticed the mpg on the dash does not go below 16, even if I beat on it. I took a road trip on sunday, and the entire trip it read 22.5 at 70-75 mph. Before the highest it would go was 21. So I will post my logged data, and tell me what you think. If anything seems weird, let me know.

RJWesleyIII
08-24-2010, 08:52 PM
I also have a slight rough idle that I cant figure out? Maybe the logs will tell something that I dont know about :)