Jump to content
  • Welcome To Mopar1973Man.Com

    We can see that your guest and been lurking about. When you register on the Mopar1973Man.Com site you'll be able to interact with all the other members. This is the most friendliest Cummins forum you'll ever join. Take the time right now and  REGISTER  on the Mopar1973Man.Com this will open up many more options and functions on the website. Everyone is very friendly and helpful just ask questions and everyone will help you out the best they can. 

Sign in to follow this  
CUMMINSDIESELPWR

What fuel pressure do you run if you have a gauge?

what is your fuel pressure at idle and WOT multiple choice  

210 members have voted

  1. 1. what is your fuel pressure at idle and WOT multiple choice

    • 10-12 idle
      10
    • 13-15 idle
      30
    • 16-18 idle
      50
    • 19-21 idle
      33
    • 22+ idle
      7
    • 10-12 WOT
      21
    • 13-15 WOT
      33
    • 16-18 WOT
      28
    • 19-21 WOT
      4
    • 22+ WOT
      2


Recommended Posts

I run around 19psi at idle and about 13 psi WOT. I have been recently thinking about my fuel delivery system. I have an Airdog 165, but the feed line goes to the OEM filter housing. Right before I bought the airdog I replaced the oem filter with a new one. And I wanted to take advantage of any pre-heat I could get being I live in the PNW. Whether or not it really helps, I dunno. But I think my flow is reduced because of the smaller steel line from the filter housing to the vp44. Although, I do like the extra filter for insurance before the vp44.

Share this post


Link to post
Share on other sites

I run around 19psi at idle and about 13 psi WOT. I have been recently thinking about my fuel delivery system. I have an Airdog 165, but the feed line goes to the OEM filter housing. Right before I bought the airdog I replaced the oem filter with a new one. And I wanted to take advantage of any pre-heat I could get being I live in the PNW. Whether or not it really helps, I dunno. But I think my flow is reduced because of the smaller steel line from the filter housing to the vp44. Although, I do like the extra filter for insurance before the vp44.

I am set up just like you except I installed a bigline kit http://www.vulcanperformance.com/Universal-Big-Line-Filter-to-Injection-Pump-Kit-w-p/ffip59.htm form the fuel canister to the vp. I added a push lock tapped tee for fuel prsssure access.post-10340-138698184144_thumb.jpgI use the 90 with the tap to bleed the low pressure fuel system when neccesary. it Keeps my WOT at 16.5 psi.

Share this post


Link to post
Share on other sites

Yea, but 3 others only answered once!

Must be the home of the blind. I know I'm a memeber.

Share this post


Link to post
Share on other sites

18 psi @idle14 psi @WOTAir Dog 100 with big line kitOriginal fuel filter still plumbed in

Share this post


Link to post
Share on other sites

15-16psi @idle and 13-14@WOT. Running a FASS 95 w/fuel filter and water seperator. Through the factory tank pick up and still running through the factory fuel filter as well although that may soon change to increase fuel pressure a little.-Jordan-

Share this post


Link to post
Share on other sites

Verified mine today... With starting temps as low as +10*F this morning it was 17 @ idle and 15 @ WOT. But by the time the fuel warmed up in Ontario, OR today at nearly 60*F out its back to normal summer pressures of 19-19.5 @ idle and 17 @ WOT.Now the spring problem is gone for me... The trick is for all AirDog 100 and AirDog 150 pumps remove your spring and slightly crush the end coils so they are no longer absolutely circle but slightly oval. No more check ball jamming in the coils of the spring! :thumbup2:

Share this post


Link to post
Share on other sites

Verified mine today... With starting temps as low as +10*F this morning it was 17 @ idle and 15 @ WOT. But by the time the fuel warmed up in Ontario, OR today at nearly 60*F out its back to normal summer pressures of 19-19.5 @ idle and 17 @ WOT. Now the spring problem is gone for me... The trick is for all AirDog 100 and AirDog 150 pumps remove your spring and slightly crush the end coils so they are no longer absolutely circle but slightly oval. No more check ball jamming in the coils of the spring! :thumbup2:

Where is this check ball / spring thing-a-ma-bob? If ya' don't mind me askin'? I think I know, but, wanna' make sure.

Share this post


Link to post
Share on other sites

Where is this check ball / spring thing-a-ma-bob? If ya' don't mind me askin'? I think I know, but, wanna' make sure.

It's in the pump behind the fitting that leads to the engine. I've got a problem with mine that the fuel pressure swings a good 4 psi. At idle it's not too bad but as soon as I put a little power down the gauge needle is swinging pretty good. I've ordered new springs but just wondering if anybody here has had this problem.

Share this post


Link to post
Share on other sites

Where is this check ball / spring thing-a-ma-bob? If ya' don't mind me askin'? I think I know, but, wanna' make sure.

post-2-13869818431_thumb.jpg Actually its the return line to the filler neck will have all this behind the fitting...

Share this post


Link to post
Share on other sites

Verified mine today... With starting temps as low as +10*F this morning it was 17 @ idle and 15 @ WOT. But by the time the fuel warmed up in Ontario, OR today at nearly 60*F out its back to normal summer pressures of 19-19.5 @ idle and 17 @ WOT. Now the spring problem is gone for me... The trick is for all AirDog 100 and AirDog 150 pumps remove your spring and slightly crush the end coils so they are no longer absolutely circle but slightly oval. No more check ball jamming in the coils of the spring! :thumbup2:

You didn't by chance take a picture of your tweak spring did you? I'd like to do that but it's a pain to get to and only wanna do it once. My PSI is 16 at idle and 14 at WOT and I'm running a 17 pound spring on an ad 100. Luke

Share this post


Link to post
Share on other sites

I've still got a stock lift pump on the block. 12.5 psi at idle and 8psi at WOT. I do have an AD 100 and big line kit on the bench waiting to be installed. I will be fixing the spring issue before I put the pump in.

Share this post


Link to post
Share on other sites

I've still got a stock lift pump on the block. 12.5 psi at idle and 8psi at WOT. I do have an AD 100 and big line kit on the bench waiting to be installed. I will be fixing the spring issue before I put the pump in.

Is your VP the original? With those type of pressures your on borrowed time. Just putting on your AD 100 is going to help but it is not going to repair any damage done with your low pressure that your showing. :2cents:
  • Like 1

Share this post


Link to post
Share on other sites

Is your VP the original? With those type of pressures your on borrowed time. Just putting on your AD 100 is going to help but it is not going to repair any damage done with your low pressure that your showing. :2cents:

I replaced the lift pump only at 100k miles and then the VP and lift pump at about 200k miles. I never knew about these issues until a few years ago when I started reading up on things so I set aside some money for another VP and I figured I'd just run it until it quits. Still going for over 2 years now. Power is still good and mileage is 15-16/gal on winter fuel with the truck loaded with tools.

Share this post


Link to post
Share on other sites

I never knew about these issues until a few years ago when I started reading up on things so I set aside some money for another VP and I figured I'd just run it until it quits.

Glad you got it figured out. Just didn't want to see you be upset when the VP goes south!
  • Like 1

Share this post


Link to post
Share on other sites

[ATTACH=CONFIG]3634[/ATTACH] Actually its the return line to the filler neck will have all this behind the fitting...

So your saying that spring is not on the Raptor 100 since the return line does not run thru like yours? Is that right. Another question is why I'm seeing sometimes as much as a 5 p.s.i. drop at wot. Would a 60 gallon per hour pre filter cause that? I can change to 90 gal. per hour filter easy enough. BTW, I do have the Vulvan big lines all the way from the big draw straw to the vp. Thanks for opinions too:hyper:

Share this post


Link to post
Share on other sites

The Raptor has an adjustable regulator for fuel pressue like the ADII does.

Share this post


Link to post
Share on other sites

Thanks Driply and Mopar I realize, but was wondering too if anyone knew the amount of flow the ISB engine is capable of. Like say 90 gallons per hour. If that's true then I need to go the next filter size up.Also where is that spring and ball on a raptor 100. Don't know how I get so lost and don't understand. I think my head's all bone sometimes:banghead: :)

Share this post


Link to post
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Sign in to follow this  



×
×
  • Create New...