Engine/Transmission (1998.5 - 2002) Vulcan Draw straw V

[JCyrbok]

Can the vulcan draw straw V be used ona 2001. 5 2500 to upgrade the fuel module? The tag line at Geno's says 98. 5-2009 but then in the description it says it is for 05-09 trucks to bypass the intank pump.



I like the idea of upgrading the tank module vs dropping in a new stand pipe type draw straw as I worry about fuel starvation when the tank is low and/or fuel is sloshing.



Any idea????



J-



heres a link VULCAN PERFORMANCE - DRAW STRAW V ('98. 5-'09) DODGE-Dodge Cummins and Ford Power Stroke Diesel Truck Accessories - Geno's Garage

 

[EForbes]

I would call genos, to get clarification on the tube. It doesnt look like the one on vulcans website, maybe check out vulcan.

 

[Huff N Puff]

Sloshing fuel is a big problem

Can the vulcan draw straw V be used ona 2001. 5 2500 to upgrade the fuel module? The tag line at Geno's says 98. 5-2009 but then in the description it says it is for 05-09 trucks to bypass the intank pump.



I like the idea of upgrading the tank module vs dropping in a new stand pipe type draw straw as I worry about fuel starvation when the tank is low and/or fuel is sloshing.



Any idea????



J-



heres a link VULCAN PERFORMANCE - DRAW STRAW V ('98. 5-'09) DODGE-Dodge Cummins and Ford Power Stroke Diesel Truck Accessories - Geno's Garage

Below a 1/3 of a tank. If I had it to do over I'd put an intank lift pump and team it up with a external booster pump. If one of the pumps quits it would still move fuel at a reduced pressure.

 

[EForbes]

Why would the pump starve for fuel, original design put the lift pump under the hood mounted on the block, before upgrading mine, i drove till tank was empty, didn't change my fuel pressure. So mounting one on the frame, closer to the tank, is gonna be easier on the pump, especially if you put bigger lines from pump to vp44. Dont let people get you scared that it will lose siphon, when tank is low, if that where the case there would've been a lot of angry customers when the truck was new, being only able to use 2/3 of a tank.

 

[JCyrbok]

OK maybe I was unclear. I am not concerned with sucking air with my current set up (FASS 150, -6 lines from the tank to the VP). I am looking to build a better mouse trap so to speak. I do loose 2 PSI at WOT with the current set up with the bone stock fuel module (no intank pump), which has the "baffle" that the intake is in and with the return dumping into the "baffled" area. This is what keep the fuel pick up from sucking air. I am looking to reduce the lower PSI when WOT and when the tank gets below 1/4 tank (which drops about 1. 5psi at idle). I can run my tank to empty too.



Atleast the way I understand it when you put in a stand pipe type draw straw, the end of the straw is cut so that it is close to the bottom of the tank and is NOT in the "baffeled" area so as fuel is low level, sloshing around, going up/down long grades etc I could totally "see" the draw straw sucking air. Maybe I'm wrong, but I could swear I have read of this kind of thing happening here on TDR.



The draw straw V looks like it is not neccesarily a stand alone draw straw set up but an upgrade to the existing stock fuel module with a larger intake tube that replaces the stock one. It also reused the stock intake as the FASS return to dump fuel into the "baffeled" area to keep the fuel flowing regardless of fuel level etc.



If I am wrong please let me know, I'm a cop not a fluid engineer, LOL



Going to the intank pump or to a different pump set up is not what I am looking to do as my FASS does the job and it would be a waste of money to scrap the FASS to go to something else.



Thanks

J-

 

[WTBurke]

J-

Removing the sump module will reveal the overall factory design. Eric at Vulcan has instructions with the "Draw straw" to modify the sump-return reservoir. It does change the ability to run the tank to very low levels.



Below a 1/4 tank I lose prime but, the Airdog recovers right away. This occurs coming to a fast stop in traffic at an intersection. In deed, this is an annoyance as I would prefer not to loose "quench" and momentarily dry-stroke the VP-44. I now never operate below 1/4 tank of fuel.



Now, all of this sounds kind of scary but, what I do like about Vulcan's draw-straw is the hot-fuel being recirculated is no longer being directly fed to the VP-44. I believe part of the failure in VP-44's is the factory design that allows the unknowing operator to run low on fuel for extended periods of time and not realizing the heated condition of the fuel.



I have adopted a discipline not to allow a "low fuel" situation to occur in my driving habits. I will accept the positive improvement and leave behind the direct return dump of hot fuel into the factory canister.



I too have contemplated doing something differently to the sump just because of the low fuel scenario but, once you follow Eric's instructions to "swiss-cheese" the original sump in his instructions... there is no turning back.



I belive this was done specifically to eliminate the hot fuel situation by Vulcan's design.



Well... you could purchase another factory sender-sump assembly but, it's pricey.



All in all, I've accepted the short comings of the draw straw modification because I feel the benefit out weighs it. I just changed my discipline of keeping my tank above a 1/4 tank.



Along with all the nice J fittings it sure makes the entire fuel delivery system a pleasure to service if required. Besides, it looks very cool to other fellow diesel enthusiasts who might examine your work.



I lost my VP-44 at 72K miles. I redid the entire platform... Airdog,lines,fittings and draw straw (i dropped the tank) and it's now the way a diesel enthusiast would want his fuel delivery system to be. It's bad to the bone



William

 

[Huff N Puff]

When you are low on fuel

OK maybe I was unclear. I am not concerned with sucking air with my current set up (FASS 150, -6 lines from the tank to the VP). I am looking to build a better mouse trap so to speak. I do loose 2 PSI at WOT with the current set up with the bone stock fuel module (no intank pump), which has the "baffle" that the intake is in and with the return dumping into the "baffled" area. This is what keep the fuel pick up from sucking air. I am looking to reduce the lower PSI when WOT and when the tank gets below 1/4 tank (which drops about 1. 5psi at idle). I can run my tank to empty too.



Atleast the way I understand it when you put in a stand pipe type draw straw, the end of the straw is cut so that it is close to the bottom of the tank and is NOT in the "baffeled" area so as fuel is low level, sloshing around, going up/down long grades etc I could totally "see" the draw straw sucking air. Maybe I'm wrong, but I could swear I have read of this kind of thing happening here on TDR.



The draw straw V looks like it is not neccesarily a stand alone draw straw set up but an upgrade to the existing stock fuel module with a larger intake tube that replaces the stock one. It also reused the stock intake as the FASS return to dump fuel into the "baffeled" area to keep the fuel flowing regardless of fuel level etc.



If I am wrong please let me know, I'm a cop not a fluid engineer, LOL



Going to the intank pump or to a different pump set up is not what I am looking to do as my FASS does the job and it would be a waste of money to scrap the FASS to go to something else.



Thanks

J-

And the external pump cavitates cause of sloshing fuel, it wreaks havoc on the VP44. The fuel module keeps the fuel around the pump. Sure the external pump will recover but in the process the VP is getting hammered high pressure pumps dont like cavitation.

 

[TempletonD]

The Draw Straw V was designed for guys that have the in tank fuel pump which I had.

When I upgraded to a FASS 95/150 I went with the Draw Straw V. I have no low fuel issues at all. The return fuel dumps right back into the fuel bucket.

 

[Sixpack]

The Draw Straw V was designed for guys that have the in tank fuel pump which I had.

When I upgraded to a FASS 95/150 I went with the Draw Straw V. I have no low fuel issues at all. The return fuel dumps right back into the fuel bucket.

What kind of fuel pressure do you have after the DSV install?



Phil

 

[Bob Cochran]

Install a Transfer Flow and it never gets below 1/3 tank unless you run Transfer Flow and OEM tank empty. For me my total fuel load is 105 Gallons. To much of a shock dollar wise even with fuel cost down to let that happen. I know pay me now or pay me later still a shock. I usually fuel around 600 miles and fill both tanks as necessary.

 

[BDaugherty]

Go to Vulcan's web site or call them directly. Know what you want before you order from Genos. I haven't done it yet, but I plan on using the DSV on my '01.

 

[jeepit]

The Draw Straw V was designed for guys that have the in tank fuel pump which I had.

When I upgraded to a FASS 95/150 I went with the Draw Straw V. I have no low fuel issues at all. The return fuel dumps right back into the fuel bucket.

I have ordered the kit to reinstall the intank pump module minus the pump. The return then dumps in the module instead of the fuel filler neck keeping the sump full of fuel. Just have not had the time to get this done...

 

[TempletonD]

I have 22lbs at idle and 20 cruising. never drops below 18 at wot.