Advertisement
If this is your first visit, be sure to check out the FAQ by clicking the link above. You may have to register before you can post: click the register link above to proceed. To start viewing messages, select the forum that you want to visit from the selection below.

Home Who's Online Today's Posts HP Calculator CompD Gift Shop Mark Forums Read
Go Back   Competition Diesel.Com - Bringing The BEST Together > Tech Area- Dodge > Dodge Tech > 94-98 2nd Gen. 12V
Register Members List Timeslips EFI Live Library Invite Your Friends FAQ Calendar Mark Forums Read

Closed Thread
 
Thread Tools
Old 06-11-2010, 06:16 PM   #1
Kronic_187
 
Kronic_187's Avatar

Name: Kronic_187
Title: Mekanical injection junky
Status: Not Here
Join Date: Sep 2009
Location: British Columbia, Canada
Member`s Gallery
Posts: 1,296
Max fuel pressure to put on a p7100

alrighty.... just wanting a genral consenus of how much is "max" pressure you should be running.... currently i have mine set @ 35-40ish


here some guys crank it to 50

@ what point are the seals "thought" to be pushed and fuel runnin into the oil ???
__________________
96:CCLB/4x4:NV4500/DD Valair,181/210,181's-131seats,5x.014SAC,2095,4GSK,A1's,60/60/16 over 75/96/1.32,60#VS,Dual Pusher,Custom fuel/Dual feed,ProFab Bar,6" longarm,Junkyard Freespin Kit
 
Old 06-11-2010, 06:49 PM   #2
Btp 2332
 
Btp 2332's Avatar

Name: Btp 2332
Title: Too Much Time
Status: Not Here
Join Date: May 2008
Location: Curtisville PA
Member`s Gallery
Posts: 1,416
Have mine around 40-45psi on my new air dog.
__________________
2014 CTD 2500
1998 12v 11.46@116.5,Goerend,Hamilton,S475 sold
Dads 97 12v-10.78@125,Goerend,Hamilton,S480 sold
 
Old 06-11-2010, 06:56 PM   #3
Valair1
 
Valair1's Avatar

Name: Valair1
Title: Valair Inc. Clutch
Status: Not Here
Join Date: Jul 2008
Location: Crowley Texas
Member`s Gallery
Posts: 2,304
Dam'n I only got mine at 30, will boosting it up help?
__________________
97 4x4 "The Farm Truck"
99 4x4 QCSB "Sport"
13 4x4 CCSB Laramie

Valair Performance Series Clutches
 
Old 06-11-2010, 07:21 PM   #4
Btp 2332
 
Btp 2332's Avatar

Name: Btp 2332
Title: Too Much Time
Status: Not Here
Join Date: May 2008
Location: Curtisville PA
Member`s Gallery
Posts: 1,416
I set mine there because my old Walboro pump drained down to 0 last time I went drag racing. Truck is strong with this Air Dog, I took it for a ride and got on it pretty good, fuel pressure guage moved maybe a lb or two stayed around 40psi.
__________________
2014 CTD 2500
1998 12v 11.46@116.5,Goerend,Hamilton,S475 sold
Dads 97 12v-10.78@125,Goerend,Hamilton,S480 sold
 
Old 06-11-2010, 07:38 PM   #5
01PPUMP
 
01PPUMP's Avatar

Name: 01PPUMP
Title: Too Much Time
Status: Not Here
Join Date: Aug 2006
Member`s Gallery
Posts: 1,104
40-45 psi is plenty of pressure there is no gain above that. As for max pressure the seals will live a long time well over 50psi I would be more worried about cavitaion and eroding on the inside of the pump with anything over that. Dual feed with 5/8 line at 40psi and you will have plenty of psi and volume.
__________________
Something new.
 
Old 06-11-2010, 07:44 PM   #6
flcrawler

Name: flcrawler
Title: Green Behind the Ears
Status: Not Here
Join Date: Jun 2009
Location: Florida
Member`s Gallery
Posts: 64
I have seen as high as 50 at wot, with a belt drive. Installed the pump about 3 months ago, no problems yet.
__________________
2000 2500 qc/lb 4x4 5-speed, GDP fuel boss lift pump, 180 P-Pump,4k gsk.
 
Old 06-11-2010, 09:38 PM   #7
White Knight
 
White Knight's Avatar

Name: White Knight
Title: Too Much Time
Status: Not Here
Join Date: Aug 2007
Location: SLO/Ferndale California
Member`s Gallery
Posts: 1,377
Quote:
Originally Posted by 01PPUMP View Post
As for max pressure the seals will live a long time well over 50psi I would be more worried about cavitaion and eroding on the inside of the pump with anything over that.
I have to ask, why? Cavitation occurs from a sudden extreme pressure drop, and erosion is a result of flow. Since pressure has almost no effect on flow I do not see how either could be a problem.
__________________
Derek
98 Dodge 2500 12 valve, 5-speed, 4x4
It's not what you buy, its what you build
 
Old 06-11-2010, 10:46 PM   #8
Chevycummins
 
Chevycummins's Avatar

Name: Chevycummins
Title: Bad case of Tinkeritis!
Status: Not Here
Join Date: Jul 2008
Member`s Gallery
Posts: 3,204
if i remember correctly i think Jim Fulmer did a test and found there is no gain over like 45 psi of fuel pressure
__________________
01 2500 4x4 12v.
215hp benched 600cc
Rob's Custom cut DV's
5x12's
Hamilton 181/210
60#springs
4 GSK
62/71/.80
 
Old 06-12-2010, 09:14 AM   #9
01PPUMP
 
01PPUMP's Avatar

Name: 01PPUMP
Title: Too Much Time
Status: Not Here
Join Date: Aug 2006
Member`s Gallery
Posts: 1,104
Quote:
Originally Posted by White Knight View Post
I have to ask, why? Cavitation occurs from a sudden extreme pressure drop, and erosion is a result of flow. Since pressure has almost no effect on flow I do not see how either could be a problem.
With the constant flow of fuel in and out of the pump it can cause erosion, I have seen alot of housing with erosion problems with stock fuel pressure(25-30psi)
__________________
Something new.
 
Old 06-12-2010, 10:57 AM   #10
Kronic_187
 
Kronic_187's Avatar

Name: Kronic_187
Title: Mekanical injection junky
Status: Not Here
Join Date: Sep 2009
Location: British Columbia, Canada
Member`s Gallery
Posts: 1,296
i'm running 1/2" dual feed, pump is moving 1gpm give or take (going by aeromotive flowchart) set @ 40ish (i say ish because the gauge on my regulator bounces around like a fish out of water) noticed a "stronger" sounding idle and noticebly stronger mid-top fueling bumping it from 20 to 40, but nothing really after that in my own "testing"
__________________
96:CCLB/4x4:NV4500/DD Valair,181/210,181's-131seats,5x.014SAC,2095,4GSK,A1's,60/60/16 over 75/96/1.32,60#VS,Dual Pusher,Custom fuel/Dual feed,ProFab Bar,6" longarm,Junkyard Freespin Kit
 
Closed Thread

Thread Tools

Posting Rules
You may not post new threads
You may not 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

Forum Jump


All times are GMT -5. The time now is 02:21 AM.

 
Powered by vBulletin Version 3.8.6
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.3.8.6
Copyright ©2006 - 2014, CompetitionDiesel.com
all information found on this site is property of www.competitiondiesel.com