LBZ CP3 Swap [Archive] - Duramax Diesels Forum

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03-GMC
01-14-2010, 06:37 PM
So I am looking for some input on this. I found a pretty good deal on a LBZ cp3. I was wondering if any of you have done the swap on your truck and how it worked out. Like what kind of rail pressure were you holding and with what pulse width?

Thanks,
Derek

02bigstrokin
01-14-2010, 06:53 PM
its a big pain in the nuts to do for minimal gain. i actually didnt notice any gain. i know ill get burned for that since "its supposed to be better" but im just being honest. just wait and get dual cp3s

x MadMAX DIESEL
01-14-2010, 06:54 PM
The LBZ pump will give you about 2k psi more I believe

03-GMC
01-14-2010, 06:58 PM
its a big pain in the nuts to do for minimal gain. i actually didnt notice any gain. i know ill get burned for that since "its supposed to be better" but im just being honest. just wait and get dual cp3s

So are you just running a stock LBZ pump?

paint94979
01-14-2010, 07:06 PM
The LBZ pump will give you about 2k psi more I believe

3,000 more psi and i noticed a big difference going from an LLY Regulator to an LBZ Regulator personally... It is a PITA to swap CP3's but it was worth it for me

03-GMC
01-14-2010, 07:10 PM
3,000 more psi and i noticed a big difference going from an LLY Regulator to an LBZ Regulator personally... It is a PITA to swap CP3's but it was worth it for me

Yeah I am doing an LBZ reg tomorrow night before i hit the rollers. Now i found a LBZ CP3 for cheap and i was planning on modding it myself before putting it in.

x MadMAX DIESEL
01-14-2010, 07:18 PM
What kind of regulator are you talking about? A wicked/II or an LBZ reg?

03-GMC
01-14-2010, 07:24 PM
What kind of regulator are you talking about? A wicked/II or an LBZ reg?

I am just doing a stock LBZ reg

x MadMAX DIESEL
01-14-2010, 07:29 PM
You will need to adjust your idle with EFI Live. It will most likely have a lopey idle at first, the LBZ reg flows more fuel at idle than the older regs

paint94979
01-14-2010, 07:32 PM
You will need to adjust your idle with EFI Live. It will most likely have a lopey idle at first, the LBZ reg flows more fuel at idle than the older regs

Do you have any experience with this?

My Truck idled just fine with a stock LBZ Regulator drove like it was stock... once you modify the Regulator and or CP3 you will need to make changes in tuning

x MadMAX DIESEL
01-14-2010, 07:40 PM
NO not personnally I did some searching and can up with this old post

http://www.duramaxdiesels.com/forum/showthread.php?t=11891

Post #7

03-GMC
01-14-2010, 07:41 PM
Yeah i read about changing the tuning. Did you mod you reg paint94979?

SDP
01-14-2010, 07:47 PM
Do you have any experience with this?

My Truck idled just fine with a stock LBZ Regulator drove like it was stock... once you modify the Regulator and or CP3 you will need to make changes in tuning

The OP has an LB7, it will need tuning to idle.

I don't think I gained too much from it being that I was already holding rail pressure OK but I think that my FPRV is opening now because of the added rail pressure. I see 26,000psi till it drops down to 20-21k. I'll have to see if welding it closed helps the problem.

TrentNell
01-14-2010, 08:13 PM
I picked up an extra 1500 psi from swapping to a modded LBZ reg , its a good mod for the money IMOP

03-GMC
01-14-2010, 08:38 PM
Yeah i figure i will switch to a stock mod for now until i get the cp3 then mod them all at once.

02bigstrokin
01-14-2010, 08:53 PM
So are you just running a stock LBZ pump?

no im running 2 stock lb7 pumps. i took the lbz one back out. i had bad luck with it.

03-GMC
01-14-2010, 08:57 PM
no im running 2 stock lb7 pumps. i took the lbz one back out. i had bad luck with it.

Oh i see...... I had no clue you could run thats setup until searching the forums today at work