LLY: Ported Fuel Rail Fitting necessary?

cstephens93

cstephens93

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Oct 13, 2014
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Is a ported fuel rail fitting, aka one that PPE sells really necessary?

Its only like 35 bucks, so im not sure if its worth the trouble or not when I already have a shim kit installed.

Also....a guy on facebook is selling an LMM Cp3 with 130k miles for 300 bucks, is this a good buy or would it be best to just save for a modified lbz cp3 or sportsman pump? Stock injectors/turbo still obviously, no plans to upgrade injectors ever
 
CentolaCCSB

CentolaCCSB

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Nov 2, 2015
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Just pull the stock one out and drill it out yourself, i bought one from PPE and it would leake even when torqued to spec, if you compare the construction of the two you can see the aftermarket one has a smaller lip that helps seal it causing fuel to leak by. Make sure you have a nice clean hole with no debris of course im not to sure of the size to use maybe you can find the spec of one and get the correct bit
 
moparkxracer

moparkxracer

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Jun 25, 2010
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I drilled all of mine to the size of the hole in the line that goes to each fitting. Also drilled my railes for the injector lines.
 
cstephens93

cstephens93

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CentolaCCSB said:
Just pull the stock one out and drill it out yourself, i bought one from PPE and it would leake even when torqued to spec, if you compare the construction of the two you can see the aftermarket one has a smaller lip that helps seal it causing fuel to leak by. Make sure you have a nice clean hole with no debris of course im not to sure of the size to use maybe you can find the spec of one and get the correct bit
Click to expand...

Right, I forgot about doing that.

I saw a kid on instagram do that, but I didnt know if that was potentially a harmful thing to do if you dont have a steady hand
 
ikeG

ikeG

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Apr 19, 2011
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Thats probably the going rate for a good CP3. I have one was going to keep for a spare but i'd ship it to ya for $350. I bought it new in 2012, has 65 sled pulls on it. Maybe 100 road miles. LBZ pump with regulator,.
 
cstephens93

cstephens93

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04jimc said:
Thats probably the going rate for a good CP3. I have one was going to keep for a spare but i'd ship it to ya for $350. I bought it new in 2012, has 65 sled pulls on it. Maybe 100 road miles. LBZ pump with regulator,.
Click to expand...

I'm weighing the pros and cons of pulling the trigger on that.

I have heard replacing the CP3 is a PITA
 
CentolaCCSB

CentolaCCSB

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cstephens93 said:
Right, I forgot about doing that.

I saw a kid on instagram do that, but I didnt know if that was potentially a harmful thing to do if you dont have a steady hand
Click to expand...

Wont be too bad if you have a vice, just set it and forget it:thumb:

If your nervouse just increase the bit size until you get to the desired size, foolproof that way
 
Burn Down

Burn Down

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Sep 14, 2008
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I just used my vice and drill, go nice and slow and make sure you get all the burrs and debris cleaned out of the rail. I used the same bit for the rail fitting.
IMG_0141_3.jpg
 
moparkxracer

moparkxracer

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Make sure you use one of the nylon engine cleaning brushes to scrub the inside of the rail to get any shavings out. Or you'll be having injectors serviced.
 
c20elephant

c20elephant

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Apr 25, 2013
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Here you go...

www.duramaxdiesels.com

Ported Fuel Rails

Anyone running these? Interested in any results (positive or negative) you care to share.
www.duramaxdiesels.com www.duramaxdiesels.com


www.duramaxdiesels.com

Fuel Rail Fittings

I know PPE sells the fuel rail fittings for like $40ea, but I've heard of people drilling out their stock ones to the size of the PPE ones (3/32). Im thinking about doing this while my fuel rails are out, anyone see a difference in them?
www.duramaxdiesels.com www.duramaxdiesels.com



Fleece Performance Engineering ported fuel rail fitting test

Part 1
Source: https://www.youtube.com/watch?v=m95OEIeX6uQ


Part 2
https://www.youtube.com/watch?v=3J7ZoQrKbzA&desktop_uri=/watch?v=3J7ZoQrKbzA&app=desktop
 
cstephens93

cstephens93

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DAVe3283

DAVe3283

Heavy & Slow
Sep 3, 2009
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I'm over 500 HP now by a fair chunk (12mm stroker CP3 and 100% over injectors) and I've never had any problem holding rail pressure. After watching the Fleece video, I feel it has no real benefit for my power level. So why risk the burrs getting into your injectors, leaks, etc? That's why I didn't do it.

Sent from my FlashScan V2.
 
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