2.5 truck lift pump questions

dodgemaniac

dodgemaniac

New member
I will soon be purchasing a lift pump for my truck that I plan to run in the 2.5 pulling class.

I am looking at the airdog II 200gph, the airdog II 4g 165gph, and fass platinum 220gph. Looking for opinions on what is working best for people now. Truck see's very little street time.

Also I am debating between running a draw straw or using a sump. Looking for opinions if going with a sump is worth the additional cost.
 
I heard 1/4 tank full issues with draw straw. I mounted a sump in the tank and used the draw straw with clipped straw for my fuel return. I had an Air Dog 150 that worked for me. Switched to belt driven pump for this season.
 
I run a A1000 on mine with 2 tank sumps. It's a 98 12V truck I built for 2.5. The fuel tank canister serves only one purpose, fuel level. I street drive it here and there and haven't had issues sucking air. Then again I tried my best to 'strategically' place my two sumps on the tank. And screw buying dumps, I made my own out of 4" flat washers that I welded a 10AN bung to, drilled 5 holes, did the same with a 4" washer for the inside of the tank and RTVed the heck out of it. The two dumps dual feed into a Y block that single feeds the A1000. Granted it's only been a month or two since The trucks been running, but I haven't had a single fuel problem.
 
Looks like a sump is the way to go.

What about the pump itself? Is the fass worth the extra money over the Airdog unit?
 
dodgemaniac said:
Looks like a sump is the way to go.

What about the pump itself? Is the fass worth the extra money over the Airdog unit?
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Personally I don't think the fass is worth the extra money. I currently have twin AD 150's on my puller and have never had an issue with it. Only time I ran into an issue was on my street truck running high pressure on long trips.
 
PVXCummins said:
I run a A1000 on mine with 2 tank sumps. It's a 98 12V truck I built for 2.5. The fuel tank canister serves only one purpose, fuel level. I street drive it here and there and haven't had issues sucking air. Then again I tried my best to 'strategically' place my two sumps on the tank. And screw buying dumps, I made my own out of 4" flat washers that I welded a 10AN bung to, drilled 5 holes, did the same with a 4" washer for the inside of the tank and RTVed the heck out of it. The two dumps dual feed into a Y block that single feeds the A1000. Granted it's only been a month or two since The trucks been running, but I haven't had a single fuel problem.
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Have a picture of said dump.?
 
Will a 165 gph pump be enough? It seems like the Airdog II 4g is doing well I just don't want to buy one pump now and then another in a year when I find out that I didn't go big enough.
 
really depends on what you have for a p pump set up ... for what its worth back in the day of the 2.8" class my single AD 150 was not enough pump to keep up with my 550CC 12mm pump with the factory 215 pump cam.
 
BRE said:
I think a lot of that answer will depend on your return line setup.
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Could you enlighten me on how this effects it ? I plan on running the setup as the kit is designed.


Also, does anyone know how the air dog 4G adjusts fuel pressure ?
 
dodgemaniac said:
Could you enlighten me on how this effects it ? I plan on running the setup as the kit is designed.


Also, does anyone know how the air dog 4G adjusts fuel pressure ?
Click to expand...

I believe he is referring to the return coming from the p pump to the fuel tank. It is much harder to hold good fuel pressure with the factory overflow when running any aftermarket electric style lift pump as the factory overflow returns a lot of fuel to the tank. An upgrade to a tork tech or a regulator style return will still return fuel to the tank just not as much which will increase overall fuel pressure.

As for my old set up I was referring too, I was running the smallest tork tech overflow valve as my return to the tank. Once my pump went full fuel the max fuel pressure I could hold was 35 PSI which is on the low side for supply pressure on a puller.
 
94 12valve said:
I believe he is referring to the return coming from the p pump to the fuel tank. It is much harder to hold good fuel pressure with the factory overflow when running any aftermarket electric style lift pump as the factory overflow returns a lot of fuel to the tank. An upgrade to a tork tech or a regulator style return will still return fuel to the tank just not as much which will increase overall fuel pressure.

As for my old set up I was referring too, I was running the smallest tork tech overflow valve as my return to the tank. Once my pump went full fuel the max fuel pressure I could hold was 35 PSI which is on the low side for supply pressure on a puller.
Click to expand...

That makes sense thanks for the clarification. I'm just gonna go with a bigger pump and not have to worry about it.
 
I run a fass 220 with a tork tek 050 overflow valve and my fuel pressure stays right at 65-70psi. pressure stays right at 60psi at wot.
 
Everybody always says regulator but I never here any specs on tying them in to the fuel system. Like what type of fitting are you using in place of the OFV(its real tight in there). What size line are you running is the stock 5/16 line best? What about the injector return line? T this in before or after the regulator go directly to the regulator.
 
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