I got a small refund from Uncle Sam this week and I am planning on installing a mechanical fuel pump.  My question is whether I should go with the Assassin or Fuel Boss--what is the good, the bad, and the ugly of each.  I know these topics have been beat almost to death but if you can point me in a direction of an article that has already compared the two that would more than suffice.  I have searched through the different forums but I was hoping for a little bit more.

 

Thanks,

I believe they are about the same, same principal of a mechanical lift pump running off the crank. All based off the MITUSA if i'm not mistaken. Call them both and pick their brains is the best answer...leave a message with richard at GDP and he will get back to you that same day.

I vote for Fuel Boss. I heard issues in regards to Assassin Pump and their regulators. Wild up and down swings... Might ask around over at CumminsForum and there is a member here with Assassin pump as well.

I don't think they provide any filtration, water/air seperator in their system. Thats a huge drawback. If you could get a filter block with it, you'd be looking great.

I would suggest a Fuel Boss, that way you actually have some customer service.

 

I have an Assassin for sale, with 3,000 miles on it........ Jus' sayin'.

I recommend carrying an extra drive belt and tools under the seat. Can't hurt anyways

I recommend carrying an extra drive belt and tools under the seat. Can't hurt anyways

 

I always do, and luckily I never had to use them..... Except for once, and it was because of my stupidity.

I always do, and luckily I never had to use them..... Except for once, and it was because of my stupidity.

I've done the same thing.... woke up one morning at the pump having put in too many hours at work I realized I had just put 15 gallons of gas in my truck :banghead:

I always do, and luckily I never had to use them..... Except for once, and it was because of my stupidity.

 

If you don't mind me asking, what kind of "stupidity" would result in changing a belt?

 

Thanks all for the replies and advice.

If you don't mind me asking, what kind of "stupidity" would result in changing a belt?

 

Thanks all for the replies and advice.

 

I didn't need to change the belt.

 

I had my regulator apart to shim it. The shim was enough, but I just thought I'd stretch the spring just a little, you know, nothing major... Well I was pressed for time, and I didn't start the truck to check the pressure. The next morning I get in the truck to take a 2 hour trip, and it idled at 13-14 PSI or so, and under light throttle, my pressure gauge was pegged. I had to pull over a couple of times to cut the spring down to get my pressure right.

I have no second guesses about the fuel boss. It allows you to keep your stock pump too, so you essentially have 2 working pumps if one fails.

I have about 15K on a fuel boss with no issues. Richard provides great service.  I also like the idea of having an electrical pump for priming and back up.   I see about 15 at idle and 18 at wot. 

Just got another phone call about a dead Assassin pump that didn't work for very long the owner gave up and went to a AirDog 165 and now fighting the pressure up and down swings of a adjustable regulator of the AD 165.

Strange, I've never had pressure problems with mine.

Strange, I've never had pressure problems with mine.

 

Same here. Adjusted mine once right after install. No leaky quick connectors either.

 

My pump also was produced before AD sold out.

I am running one of the first production runs of the Assassin pumps and aside from changing an improperly deflected belt ( my fault) I have not had any issues.  on a rare occasion I will get a spike of 22psi instead of 21psi but I haven't ever had low pressure, leaks, or any other faults.  I have had it on my list for a while to do a rail mount 2 mic filter and separator but have been running the stock filter set up since install.  I have taken mine apart several times to check for the elusive debri some have issues with and have not found any yet.  I did have a bit of slow customer service to receive mine but I was also forewarned by Stefan beforehand so I couldn't and didn't complain.  I consider myself lucky I guess, but I really like my Assassin.  I don't remember when I installed it but its been quite a while back now.

Alright guys. I think I am going to start checking into getting a fuel boss in the next couple weeks. I will probably do the beans diesel sump in the tank as well. I am just getting tired of always wondering if my raptor 100 will "get me there". It is still rock steady with pressure so dont think it will go out soon, but you never really know.

What is everyones thoughts on the fuel boss? Anything I need to watch out for as far as installation or parts? Thanks fam!

If you can stick it out for another year or so, as I do not know what the time table is for it, but it would be worth it; you may want to wait until something else comes onto the scene, soon. I don't think I'm really at liberty to really mention much else, but when it comes out, I'm ditching my AD.

Areomotive a1000

If you can stick it out for another year or so, as I do not know what the time table is for it, but it would be worth it; you may want to wait until something else comes onto the scene, soon. I don't think I'm really at liberty to really mention much else, but when it comes out, I'm ditching my AD.

I have thought about that too. To be honest though, I want to get away from electric pumps all together. I know the proposed upcoming products are going to be awesome, but just the thought of not having to rely on electricity to keep the VP happy is a BIG plus for me.

 

And the other thought I have, will the raptor keep going that long? I got mine right in the middle of the "trouble" period last spring and I am kind of amazing I have never had a problem with it.

Edited March 15, 201411 yr by Ilikeoldfords

I have thought about that too. To be honest though, I want to get away from electric pumps all together. I know the proposed upcoming products are going to be awesome, but just the thought of not having to rely on electricity to keep the VP happy is a BIG plus for me.

 

And the other thought I have, will the raptor keep going that long? I got mine right in the middle of the "trouble" period last spring and I am kind of amazing I have never had a problem with it.

i respect your thoughts, but a little food for thought....the VP44 don't work without electricity! furthermore, you get air and water separation from an airdog. as well as a lifetime warranty. i've had mine for over 5 yrs now with nearly no problems (leaks, electrical, etc) until what i mentioned in this post: http://forum.mopar1973man.com/index.php?/topic/7966-need-help-asap-with-airdog/

i am not a spokesman or get paid by airdog. i'm merely a member of this forum trying to give other members insight based upon my experiences.