Larger injectors and CPs - Diesel Truck Forum -
Thread Details Posted by heavyhaller, this thread has received 4 replies and been viewed 900 times.

LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 06-18-2009, 12:44 AM Thread Starter
Senior Member
Join Date: Sep 2007
Location: Usk, Washington/Hesperia, Calif
Posts: 775
Points: 34,508
Thanks: 98
Thanked 31 Times in 27 Posts
Larger injectors and CPs

I read in one of the Diesel mags that getting power out of a tunner with stock injectors causes the injectors to be open longer causeing the timming to be more critical and increasing the CPs. My question is; if you switch to 155cc or larger and only want the same power that you had with a set of 135cc and a good tune. Will it decrease the CPs because the injectors do not need to be open as long?
heavyhaller is offline  
Sponsored Links
post #2 of 5 (permalink) Old 06-18-2009, 01:03 AM
I Wanna Go Fast!
brentos's Avatar
Join Date: Jul 2007
Location: Glasford illinois
Posts: 4,006
Points: 18,775
Thanks: 103
Thanked 329 Times in 307 Posts
there are two things in consideration here pulswidth and timing. the big thing used to be to crank the timing and jack the cps out the roof but now most all tuners found that if you play with pulsewidth and fuel density there is no real need to crank the timing and gain power. So to answer your question if you using a tune with high timing then yes the 150s can help if your tuner drops the timming but other than that more fuel will add more power so will also raise the cps.

Just another 6leaker Thanks to RCD
brentos is offline  
The Following 2 Users Say Thank You to brentos For this addition to TDG:
heavyhaller (06-18-2009), Sader (06-18-2009)
post #3 of 5 (permalink) Old 06-20-2009, 08:37 AM
Senior Member
Join Date: Dec 2008
Location: Oregon
Posts: 1,570
Points: 48,550
Thanks: 19
Thanked 121 Times in 110 Posts
Good info brentos

2012 F-150 XLT Ecoboost SuperCrew 6.5' 4x4
cartmanea is offline  
post #4 of 5 (permalink) Old 06-21-2009, 12:48 AM
Junior Member
PiRiPi's Avatar
Join Date: Mar 2008
Location: MIAMI, FL
Posts: 338
Points: 34,495
Thanks: 0
Thanked 8 Times in 8 Posts
Send a message via AIM to PiRiPi
wats cp's
PiRiPi is offline  
post #5 of 5 (permalink) Old 06-21-2009, 04:08 AM
lilpooh's Avatar
Join Date: Dec 2008
Location: Sassamansville PA
Posts: 1,661
Points: 60,134
Thanks: 240
Thanked 258 Times in 226 Posts
cylinder pressure

2004 F350 CC DRW King Ranch
X-3 tunes by DJ,QT,GH,ID,Gyphon FICM tuner,head studs,II Stage 1turbo,ATS coolant recirc lines,Swamp's 48v ficm,coolant filter,Snow Perf stage II,EGR delete,AD2,4" turbo back straight pipe,K&N intake,Quad "A" pillar autometer gauges,Suncoast Tri Disk Conv.,Billet input shaft,Suncoast superduty rebuild kit,Trans-go shift kit,Mag-Hytec trans pan,CFM+ elbow,ccv mod,15K reese 5er,17" LCD TV/DVD,Cobra 29 Nitewatch CB

"Are diesel pickups hot rods? Yes,they are-perhaps the most versatile hot rods ever made"---Diesel Power Magazine
lilpooh is offline  
The Following User Says Thank You to lilpooh For this addition to TDG:
DZL BULL (06-22-2009)

Quick Reply

Register Now

In order to be able to post messages on the Diesel Truck Forum - forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
larger fuel lines Sabbath5.9 5.9L Cummins 12 Valve (1994-1998.5) 12 06-01-2009 04:58 AM
Observations with larger injectors 6L strokin 2003-2007 6.0L Power Stroke 35 04-25-2008 03:06 AM
Larger Fuel Tank cattech05 2008-2010 6.4L Power Stroke 7 03-15-2008 02:29 AM
Worse MPG with larger tires? Snow 5.9L Cummins 12 Valve (1994-1998.5) 8 10-09-2007 02:42 AM
Larger Tires Effect 6.0 skirk55 2003-2007 6.0L Power Stroke 17 04-27-2006 01:48 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

For the best viewing experience please update your browser to Google Chrome