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.
|
Dodge Competition and Performance General Dodge Competition and Performance Discussion |
08-23-2017, 05:00 PM
|
#1
|
Name: TruckYou
Title: Diesel Enthusiast
Status: Not Here
Join Date: Dec 2016
Member`s Gallery
Posts: 132
|
P7100 Lift pump fuel pressure
In the middle of my build. Building a street/strip truck for the time being, but eventually becoming a full time comp truck. Having the pump built for 5-550 cc, 5gsk, 5x20. The trucks a 1st gen, which I've engine swapped , and already has a Sump/1/2" lines. VE intended Fass is history, and I'm in need of a new lift pump. Seems to be alot of opinions on fuel pressure for the P7100. Airdogs 12v pump is present for 25-30 psi, Fass 45 psi, and yet people run 24v pumps with P7100 (15-18psi).
What is the recommended fuel pressure for these pumps?
And trying to decide is a 150gph is enough, or of a 220/240 is necessary for my goals
Sent from my Pixel using Tapatalk
|
|
|
08-23-2017, 05:07 PM
|
#2
|
Name: Mudn_1
Title: Sweet Home
Status: Not Here
Join Date: Apr 2007
Location: Trussville
Member`s Gallery
Posts: 5,290
|
my understanding is typically 10 psi per 1000rpms as a rule. We run street trucks between 50-60psi, and race truck runs about 70-80. I think 215 pumps require less psi than a 160.
__________________
"One Up'N The Competition"
|
|
|
08-23-2017, 06:49 PM
|
#3
|
Name: jasonc
Title: Too Much Time
Status: Not Here
Join Date: Nov 2009
Member`s Gallery
Posts: 4,395
|
I've run less in the past, like 25lbs full load and didn't see any difference jacking the pressure up. I know 160 pumps will benefit some with higher pressure but I didn't see any with my 215 pump.
|
|
|
08-23-2017, 08:10 PM
|
#4
|
Name: rham45
Title: Diesel Enthusiast
Status: Not Here
Join Date: Sep 2012
Member`s Gallery
Posts: 227
|
Why not go mechanical?
|
|
|
08-23-2017, 08:18 PM
|
#5
|
Name: Stox5225
Title: Green Behind the Ears
Status: Not Here
Join Date: Nov 2016
Location: Lillington, NC
Member`s Gallery
Posts: 97
|
P7100 Lift pump fuel pressure
There's a thread on CF by Dauntless89 regarding the hp the stock mechanical LP can support by streamlining the stock fuel system and removing all the banjo bolts. Pretty legit. I'm probably sitting around 500hp and my needle idles at 45 and never drops below that. And with a larger turbo, I can certainly put more horsetorques to the pavement. I'm anxious to see what this thing can do with compounds ..... but that will be a while.
Anyway ..... I'm in support of the mechanical LP.
Sent from my iPhone using Tapatalk
__________________
1997 Cummins 2500; NV4500HD; SB DD; 315/75R16; 3rd Gen Track Bar; 63/65/14; AFC Live; 7mm DV's; 4 GSK; Mac Rack Plug; Custom Fuel System; 5x.012; Colt Cam Big Stick; 60# Springs; PDD Stage 1 Push Rods; O-Ring Head; Head Studs; Fluidampr; Boost/EGT/FP Gauges
|
|
|
08-24-2017, 09:19 AM
|
#6
|
Name: CorneliusRox
Title: Seasoned Rookie
Status: Not Here
Join Date: Dec 2012
Location: Detroit, MI
Member`s Gallery
Posts: 4,154
|
Quote:
Originally Posted by Stox5225
There's a thread on CF by Dauntless89 regarding the hp the stock mechanical LP can support by streamlining the stock fuel system and removing all the banjo bolts. Pretty legit. I'm probably sitting around 500hp and my needle idles at 45 and never drops below that. And with a larger turbo, I can certainly put more horsetorques to the pavement. I'm anxious to see what this thing can do with compounds ..... but that will be a while.
Anyway ..... I'm in support of the mechanical LP.
Sent from my iPhone using Tapatalk
|
I've seen that and it's a pretty cool thread. You could also look a the one PDD sells. It's supposed to support up to ~750hp.
However, I believe the previous post was referencing a Waterman pump that can flow stupid amounts of fuel, but you have to run a billet timing cover with a hole for it and you need to modify your vacuum pump shaft to have an output for it.
__________________
Corey - BSME '21 Tesla Model 3 Perf
'22 DMax AT4 2500
|
|
|
08-24-2017, 09:41 AM
|
#7
|
Name: jasonc
Title: Too Much Time
Status: Not Here
Join Date: Nov 2009
Member`s Gallery
Posts: 4,395
|
Another option over the waterman is a belt drive automotive pump. I've been running one for 7yrs and it will make 50psi as soon as it cranks and ramps to 60 on a hard run feeding a 13mm. That's with the return regulator back almost all the way off, will make and hold much more I just haven't seen the need to.
|
|
|
08-24-2017, 11:07 AM
|
#8
|
Name: CorneliusRox
Title: Seasoned Rookie
Status: Not Here
Join Date: Dec 2012
Location: Detroit, MI
Member`s Gallery
Posts: 4,154
|
Or Aeromotive makes some bad ass pumps. Lots of people run two A1000's to feed 13mm pumps. I know they have an A2000 and A3000 pump now too, but haven't seen any on trucks yet.
__________________
Corey - BSME '21 Tesla Model 3 Perf
'22 DMax AT4 2500
|
|
|
08-24-2017, 11:43 AM
|
#9
|
Name: Redrider2911
Title: Too Much Time
Status: Not Here
Join Date: Nov 2015
Location: Yakima, WA
Member`s Gallery
Posts: 780
|
I'm running a modded mechanical lift pump following the outlined ideas in Dauntless' thread. 60psi on a 160 pump with racked barrels. Somewhere north of 600hp. PDDs pump is just a modded stock Cummins pump.
__________________
49 Willys Pickup. 5600lb. 11.8sec @115mph 1/4. 12 valve. MegaSquirted 47RH. 3.54 posi rear. 35" tires. 64mm HE351ve, S475 (75/96/1.32), A/W Intercooler. AFC mods. 5x16s. 191 DVs, 180 pump. 23*. 85psi. Build Thread
|
|
|
08-24-2017, 11:45 AM
|
#10
|
Name: Yotadzl
Title: Diesel Enthusiast
Status: Not Here
Join Date: Feb 2016
Location: Oregon
Member`s Gallery
Posts: 234
|
Bosch spec for a stock pump is 2 bar. I would recommend running at minimum 25-30 psi for a stock engine and I prefer to run a minimum of 45-50 psi on a 12mm performance build to ensure adequate fill.
__________________
'85 Yota Crawler-2l diesel, custom built VE (by me), custom T25 turbo. Slow but fun!
'95 Cummins grampa truck, embarrassingly stock
'12 Cummins, deleted
Last edited by Yotadzl; 08-24-2017 at 11:47 AM.
|
|
|
08-24-2017, 08:53 PM
|
#11
|
Name: Stox5225
Title: Green Behind the Ears
Status: Not Here
Join Date: Nov 2016
Location: Lillington, NC
Member`s Gallery
Posts: 97
|
P7100 Lift pump fuel pressure
Oh, and to answer the question of recommend FP for the P7100 .... anything 100psi and over you risk blowing seals and stuff. So I'd stick below that. I have mine set to 45ish with an Aeromotive X1 regulator with the 35-60 spring. Like I said, at WOT with 5x.012, 7mm DV's from PDD, and a 63/65/14 Super B, my FP never goes below that 45.
Sent from my iPhone using Tapatalk
__________________
1997 Cummins 2500; NV4500HD; SB DD; 315/75R16; 3rd Gen Track Bar; 63/65/14; AFC Live; 7mm DV's; 4 GSK; Mac Rack Plug; Custom Fuel System; 5x.012; Colt Cam Big Stick; 60# Springs; PDD Stage 1 Push Rods; O-Ring Head; Head Studs; Fluidampr; Boost/EGT/FP Gauges
|
|
|
Posting Rules
|
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts
HTML code is Off
|
|
|
All times are GMT -5. The time now is 04:21 AM.
|