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FASS vs. Preporator, same truck same day same dyno.

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RonA said:
It was rude of me to question the written word.

RonA

That statement is totally false. It is the open mined scientist that does the experiments and shares the unbiased results that keeps the manufacturers honest. It is also he that that ensure competition between manufacturers. You are that guy Ron. I'm sure if somebody were to give you a blue unit you'd put it right up along side the red one and tell us the diffrences. You'd probably even throw the cam driven diaphram pump in there too so we can see just what it is that's so great about these units.



People say they work, I have no doubt. They have better pressure, the truck sounds diffrent, etc, etc. This is all great but what about the manufacturers claims? I have yet to see a dyno chart. I'm tempted to fork out the pennies for a blue unit just so I can put it up next to Ron's red one and see what we get.



-Scott
 
Lets see... . I you have been running a ALMOST dead LP for a month and you intsall a FASS..... I bet you would see at least 20 HP gain over the LP. It is all in advertizing and how you look at it. And yes I noted more power and gain over my old LP.
 
I'm going to unsubscribe to this thread because I don't think it is going anywhere. But I would like to say 2 things. First, I have a FASS, it works well, and I have no problems with it or the person who sold it to me. Same on the Preporator, I don't own one, the owner called me and gave me a pitch. Pleasant, informative, seems like a good product and a nice guy. Second, I have a FASS unit that I will loan to a group, or business, that wants to test it and the Preporator to see how they perform against each other, and against their advertising. I am curious.

Ron
 
Hum... Here is Texas if we start something we finish it or stick with it to the end. Guess that is why Bush is President. :D
 
I have not seen one scientific study that says the FASS is any more realiable (mean time between failures) than the stock carter. What is this assumption that the FASS fuel pump is more realiable?
 
RonA - How many miles do you have

on your truck? I have over 100,000 on my FASS (187,000) on my 01. I have an electronic Autometer that only goes to 15PS and is always pegged! I like the other guys bought it for the dependability..... any additional claims of HP were of no major concern - my truck runs like a raped ape now... ... . Do you really think that the TDR has the resources to scientifically evaluate the authenticity of every claim made by an advertiser? Not going to happen..... that's what we've about IMO..... Bad products will result in discussion son this board - and there have been a few... ... . BUT since the VP44 was never intended to suck fuel - when the LP starts to go south - and FP drops below 5 psi - the performance of the vehicle will suffer..... and without a gauge - you have no idea that you are killing your 44..... and loosing performance at the same time.
 
one truck going 100,000 miles or 100 trucks going 100,000 miles doesn't support the claim that the FASS is more reliable or dependable. There are probably tens of thousands of stock trucks that can also make that claim with the carter. I had a failed carter and relocated a new one. We don't know the MTBF of the carter or what percentage fails within 100,000 miles or some other benchmark. Nor do we know the same for the FASS.



It may be hard to uncover, but most manufacturers of products have an engineered MTBF rating for their pumps. The FASS is being claimed to be more reliable, and it may well be. Does anyone know what pump is used, and the manufactureres MTBF rating or equivalent? or for that matter the Carters? These ratings are generaly dependable.



I understand completely the stock lift pump as implemented by Dodge contributes to all these headaches. That is why I relocated mine. I am using a carter again though. I have been using electric Carter fuel pumps for decades. It is good hardware if installed correctly as CARTER directs. (and which Dodge ignored).



I also have lower expectations. I don't look for any electric fuel pump manufactured by anyone to last more than 100,000 miles. Just too much to expect IMO. TDR is what alerted me to put in a fuel pressure gauge, and I immediately found my Lift pump to be dead at 82,000 miles. But I can't blame the carter, as it was installed incorrectly by Dodge.
 
Brad states the pump motor used on the FASS is the same type used on the fuel/air seperation systems used on over the road/ long haul trucks. If you have seen the FASS pump motor, it dwarfs the stock wimpy little lift pump that comes on our trucks. It also draws more amperage and requires a relay to handle it. A more stout pump.
 
Nickaru said:
Brad states the pump motor used on the FASS is the same type used on the fuel/air seperation systems used on over the road/ long haul trucks. If you have seen the FASS pump motor, it dwarfs the stock wimpy little lift pump that comes on our trucks. It also draws more amperage and requires a relay to handle it. A more stout pump.





Don't think it needs a larger relay to handle it..... Been running one for over a year now on the same wire and relay of the orignal LP. No Problems... .
 
again, larger beefier in itself does not mean a longer mtbf than any other pump. and drawing more current is not of itself a positive thing at all.
 
I bought my fass system a little over a year ago. I bought it for reliability expecting nothing more.



When i first got it, the truck did start quicker and idle smoother. But it had been running on a weak lift pump before. I can not say whether or not a FASS would make the same improvement over a good lift pump.



I also can not say if the FASS increased horsepower, on the dyno or S. O. P. At the same time the FASS went on so did a HX40 (from HY35) and Drag Comp (from standard comp).



A few months ago i noticed my Fass getting louder. Then it would take a second to get the fuel pressure up upon starting. Not long after that i got in the truck and went to start it up, but my FASS wasn't running. 0 fuel pressure. Brad stood behind it and got me some parts at no cost to try to fix it. The parts he sent got the pump running, but it sounded really bad. He ended up getting me a new pump a little later.



I am happy with the way Brad stood behind his product. However I'm far from convinced that the FASS (or Fuel Prep. . in my opinion) will be the reliability fix everyone is looking for. My new FASS is starting to show similar symptoms to the old one, before it failed. If i had my money back, and was looking to "fix" our fuel supply problems, i'd go with a RASP. Seems like the most reliable set up to me.



Just my opinion and experience.



Chris
 
You mean I could actually just call up Jegs and buy a 7psi carter pusher pump for $69, have them throw in a relay for $10, buy a handful of AN fittings for $20 and have a kickass "big-line" fuel system that idles at 22psi and can't be pulled under 14 WFO and helps stock LP last and last?



No way!



I for one would feel a lot better if I would have spent $600 on one of those fancy schmancy fuel pump systems and then another $250 on a big line kit... not lol
 
I have two FASS

Fellow Rammers:



I have a FASS on my 02 now for over 15K miles and it still idles 16 PSI and 15 PSI full throttle. I didn't buy it for HP, I bought it for reliability and increased fuel flow. the engine is quieter, the throttle response is stronger. I don't think I gained HP, but I did gain performance.



Now, there are gonna be naysayers out there and folks with other opinons. Mine is I'm happy and I'm gonna install one on my wife's 03.



I know too many folks who've installed 3 or 4 stock LPs (even moved them as pushers) and have seen installed a host of low cost pusher pumps.



Many of us believe beefier is better: Don't we all believe the beefier Cummins is better the PS? I like beefy.



So, there you are. Go for the beef



Wiredawg
 
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Reliability Answer...

I'm an industial technologist so I have some experience in manufatureing processes and quality control. For my part, I based the reliability on a perception of quality. I saw the pump demonstrated, it is a stout pump, the instructions looked good, the installation hardware looked high quality and the FASS offers a good warranty. I spent two days at May Madness checking it out and decided to go for it. That night at the Closing banquet, I won the other one. Brad stands behind his merchandise as well.



I buy many things that haven't been on the market long enough to establish reliability. I make the judgement call.



I believe we'll have to put some miles and years on it to bear out the reliability.



Wiredawg
 
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Guys,

I don't chime in very often and my VP-44 was replaced under warrenty about 4 months ago. I had replaced the factore LP 6 weeks before the warrenty job was done. (don't ask why I just did the LP myself) I called Fass this morning at 8:20am west coast time. No one was in the office to answer a couple of small questions. I was advised to call a place in Visaila CA. I did so. I got the answer I needed about the Fass installation. I then called Preporator I was directed to a place in Phoniex AZ and I received the information I needed...

I ordered the AirDog... . I did this because it was after 11am in Fass headquarters and NO ONE WAS HOME !

Performance is not an issue with me... . it's reliability and support... I know everyone has an off day once in awhile... . but, this was my day of panic with only 8 to 9 PSI at idle on a new VP-44... . I'm not messing around my factory warrenty ends in 12 thousand miles... . I'm gonna keep the flow to my 44 at level... . I can't afford to play games I drive 49K a year for a living



Sorry Brad but Charles got my bizz today Thursday Nov(what day is this any way?) 04



William
 
So from what I'm reading here, all you guys are interested in is a reliable fuel pump. Why don't you ask Brad or Charles to made a cheaper version that is just a pump and 1 filter. Maybe around 250 to 300 dollars. Smaller pump that doesn't recirculate the entire tank every 5 minutes and have it come with a fuel gauge. Should be a piece of cake and no patent stuff to worry about.

Ron
 
Were you expecting more horsepower or torque from a different fuel pump? :confused: When I lost my third L/P I chose the preparator for reliability only, though there were claims of HP increases. If there were substantial gains from these systems in the performance areas, we would all have them installed. I also think that by-passing the banjo bolts would help slightly if you were in the 400+ hp range. Perhaps members in this range would get a slight increase in power with a new pump... who knows. I expected reliability and got it. Too bad Dodge couldn't have done it right the first time.
 
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