cp3.4

Brayden

New member
Jan 16, 2008
1,170
0
0
www.fleeceperformance.com
CP3.3 is the stock pump...

CP3.4 is still a 3 plunger pump as well just longer stroke IIRC which develops more pressure. FWIW the CP3.4 uses the same regulator as the CP3S3/R110 that our trucks have.
 

mytmousemalibu

Cut your ride, sissy!
Apr 12, 2008
2,230
0
0
Kansas
CP3.3 is the stock pump...

CP3.4 is still a 3 plunger pump as well just longer stroke IIRC which develops more pressure. FWIW the CP3.4 uses the same regulator as the CP3S3/R110 that our trucks have.

Cool, so besides physical size/mounting issues, is there any reason it wouldn't work on our trucks? Would 1 CP3.4 be better than dual 3.3's?

Hows that billet FCA coming along?
 
Last edited:

sweetdiesel

That's better
Aug 6, 2006
10,390
0
0
52
Thailand
CP3.3 is the stock pump...

CP3.4 is still a 3 plunger pump as well just longer stroke IIRC which develops more pressure. FWIW the CP3.4 uses the same regulator as the CP3S3/R110 that our trucks have.


good to know I thought it was 4 plunger and that was what the .4 stood for

thanks for the info
 

mde

fuel injection is my life
Mar 17, 2007
396
0
0
Bucky State
that new twin front drive unit kieth showed us from curtis is for CP3.4 's

Isn't a CP3.4 like a reg CP3 but with one more chamber/piston? 4 instead of 3?

The single belt driven cp3.4 might be a good idea if it equals or betters twin reg cp3's
I think i remember the GBE truck runs a CP3.4 and in stock location?:cool2:

No, thats a normal CP3 on the twin front drive (cheked out yesterday :D ), also the the CP3 has just 3 chambers and not 4. So far I know the CP3.4 has a little more flow, also a engine oil lubricated system. The CP3.4 doesn't fit in the stock location.
 

duratothemax

<--- slippery roads
Aug 28, 2006
7,139
10
0
Wyoming
CP3, the 3 means 3 plungers. CP stands for something in german I think. the ".3" or ".4" are just the different variations?
 

mde

fuel injection is my life
Mar 17, 2007
396
0
0
Bucky State
CP3, the 3 means 3 plungers. CP stands for something in german I think. the ".3" or ".4" are just the different variations?

C: Common Rail
P: Pump

3.X : size of the pump housing and not 3 plunger
X.3/4 plunger diameter/stroke specs w or w/o oil lub

The CP1, or the new CP2 has also 3 plunger just smaller
 

mde

fuel injection is my life
Mar 17, 2007
396
0
0
Bucky State
trCourVSDur10.jpg
 

duratothemax

<--- slippery roads
Aug 28, 2006
7,139
10
0
Wyoming
ahhh interesting, thanks Volker. ;)

Brayden and a couple other people always said the CP was something german, and the 3 was 3 plunger.
 

malibu795

misspeelleerr
Apr 28, 2007
8,465
715
113
42
in the buckeye state
you would bennifit slightly from useing a LBZ pump over your lb7

umm big differrence as in i have a hard time holding 20,000psi @ 2700uS with my stock LB7 3100uS i drop to 16-17,000psi

were as a LBZ or modded cp3 can hold 3100uS at 26,0000-27,000psi


IMO that is a bigg difference ;)

thanks for the info V and brayden... looks like the answer is a modded cp3 or LBZ pump
 

sweetdiesel

That's better
Aug 6, 2006
10,390
0
0
52
Thailand
umm big differrence as in i have a hard time holding 20,000psi @ 2700uS with my stock LB7 3100uS i drop to 16-17,000psi

were as a LBZ or modded cp3 can hold 3100uS at 26,0000-27,000psi


IMO that is a bigg difference ;)

thanks for the info V and brayden... looks like the answer is a modded cp3 or LBZ pump


Your Cp3 on the lb7 could of been weak? Im not going to say that this is the MOST powerfull mod in the world:rofl:

why not a modded lbz pump? thats what im running in the vally
 

mde

fuel injection is my life
Mar 17, 2007
396
0
0
Bucky State
I'm working on a mod now, that would cost 2 cents and your stock LB7 runs like a LBZ pump or better in the higher rpm's. I have to prove that for my self first, and see whether it's working. ;)
 

sweetdiesel

That's better
Aug 6, 2006
10,390
0
0
52
Thailand
I'm working on a mod now, that would cost 2 cents and your stock LB7 runs like a LBZ pump or better in the higher rpm's. I have to prove that for my self first, and see whether it's working. ;)


more details please:)


Adam one thing to keep in mind is the way the plug is on the lb7 vs llly/lbz
one has 90* and other is straight
 

mde

fuel injection is my life
Mar 17, 2007
396
0
0
Bucky State
more details please:)


Adam one thing to keep in mind is the way the plug is on the lb7 vs llly/lbz
one has 90* and other is straight

That was fast :D

Really it would cost you nothing to $50 and have a really nice modification to your pump, like I said, I have to proove myself first, before I talk loud :rofl:

Agreed. I was told by ### that it was 4 piston, and I've been spreading it.

Sorry to anyone I told that to.

No problems, others didn't know either :hug:
 

JoshH

Daggum farm truck
Staff member
Vendor/Sponsor
Feb 14, 2007
13,765
834
113
Texas!!!
That was fast :D

Really it would cost you nothing to $50 and have a really nice modification to your pump, like I said, I have to proove myself first, before I talk loud :rofl:

Could the mod be done to an LBZ pump?