In-tank fuel pump options

Discussion in 'The Bench' started by sriley531, Dec 17, 2017.

  1. sriley531

    sriley531 Buckle up, this could get rough....

    Hey all,

    I know this probably should be in "high tech for old iron, but it'd get much less input there so I'm putting it here. (Sorry mods, if this is a mortal offense let me know, but I'm hoping I can skirt it this time since I'm usually a good boy ;) )

    So anyway, I recently picked up a fitech meanstreet 800 system here and am looking at my options for fuel supply. I currently run the robbmc 1100 mechanical, and while it's been stellar, it's obviously not for FI use. So I'm contemplating between these options (though feel free to suggest away fellas). Looking for input and opinions good, bad, or otherwise.

    Fitech has this option:

    And tanks inc:

    Don't really want to do a surge tank, and my entire fuel system is high pressure -8an hose already, so with a little strategery I can install an in tank pump without much in the way of fuel line changes. It'll be feeding a distribution block under the hood with one line feeding the throttle body and one feeding the nitrous system fuel solenoid.
    OHC JOE likes this.
  2. hugger

    hugger Well-Known Member

    You can pick up any Bosh 255 or 340 for cheap then attach it to the current pickup via hose clamps , the run the corvette inline filter/regulator setup or a separate engine bay reg. That would be the most cost effective, the best approach would be the Aeromotive Abody tank as it's baffled and what not, but then your stuck with a perfectly fine stock tank
  3. sriley531

    sriley531 Buckle up, this could get rough....

    Does that constitute a problem with fuel slosh in a non-baffled tank? The tanks inc pump has a tray that's supposed to negate that, and the fitech has a "mat" that supposedly helps. My tank is only a couple years old so I really don't want to replace it unless needed, but reusing that pickup would be sweet since it's a newer robbmc 1/2" with an fittings.
  4. woody1640

    woody1640 Well-Known Member

    I agree with hugger. I am going to run a Rover EFI on my 215 with just an inline pump. Worse case scenario you end up replacing it with a submersible pump later.

  5. moleary

    moleary GOD Bless America

    Hi Shawn, I would go with external electric pumps and run what you have from the tank.

    That said, between the two in tank units I would go with the FiTech Hy-fuel piece. I would also contact their tech and consult about the "distribution block" strategy, but I can not help to think you will be beter served splitting the fuel outlet at the pump with a wye. It looks a though it is designed with -6 pressure out. Maybe they have a -8AN or -10AN option so you can run the -8 AN to the TB and a dedicated -4AN to the N20 with return style regulator of coarse. A 100 micron and 40 micron filter set up would also be highly recommended. I like the Robb MC filters myself.

    Regardless, seperate pumps for the TB and N20 is my recommendation.
  6. hugger

    hugger Well-Known Member

    Holley has saturation mats for $125+ the corvette regulator/filter is $40
  7. Gallagher

    Gallagher Founders Club Member

    Are we seeing steps towards running in the GSR class?
    sriley531 likes this.
  8. sriley531

    sriley531 Buckle up, this could get rough....

    So why should I run an inline pump over a submersible? (not being argumentative, I'm really asking) In-line pumps are known to be noisey (though I've heard the bosch's are not) and often times spotty reliability-wise, and then theres the issue of running one on a non-sumped tank with the pump mounted higher than the pickup which common knowledge says is less then ideal. For the same money, I can buy an in-tank unit which run cooler and quieter and in my opinion is a cleaner install, so Im just wondering what the real advantage is here.

    Bosch pump ($150), holley fuel mat $125), Corvette reg ($40) = $305
    Tanks inc setup = $295
    Fitech = $349

    And other than the wiring, the in-tank stuff would almost be plug and play regarding my existing plumbing, and dropping the tank to fit/install it is no big deal. I'm just not sure what the major advantages are to piece-mealing an external pump setup unless thats just what everyone defaults to because until recently that was just the normal way of doing it (??) Not discounting anyones input here, and my mind isnt made up, I'm just unsure of the reasoning.

    As far as feeding the system off one pump and the fuel log, I've spoken to many folks who make their living on performance cars, and they've all agreed the setup I have on that will far more than suffice for my power level, The fitech has a built in regulator to obtain its 58psi, the nitrous will have its own (after the log) to knock it down to around 6.5psi, and all the pump options I'm considering are way overkill so feeding both wont be an issue. The -6 vs -8 fitting size I do need to look into though, good eye on that MarkO.

    As usual, thanks for taking the time to toss out your thoughts
  9. Philip66

    Philip66 Well-Known Member

    I had just bought a new tank for my 70 GS 455 when I changed to a 600 HP BBB.
    I have never liked the look of sump welded onto the bottom of a stock tank. Looks like you have a load in you drawers. I am currently running a carb, but I'm probably gonna do FI sometime in the future. So I decided on an Aeromotive Phantom Stealth in tank system. You use your existing tank, drill a hole in the top of it, measure the depth of the tank, cut the included fuel mat thing, cut the pump hanger, and then drop it in. Comes with everything needed for install, bolts, gaskets, etc.
    it's probably at the higher end of the spectrum price wise, but I've never even heard a whisper out of it. I think it supplies enough for 1000 hp carb or 800 hp FI. With a bypass regulator you can turn it down to 6 lbs or turn it up to 40. Or whatever you need for fuel injection.
    I probably have a $1K in it after I bought the fuel pump install kit from JEGS. It came with wires, relays and switch etc.
    If I had to do it again tomorrow, I'd do it the exact same way again!!

    Just my .02!! Or my $1000.02

    Philip T.
  10. 300sbb_overkill

    300sbb_overkill WWG1WGA. MAGA

    Not sure about the FiTech unit but I do know the FAST EZ EFI 600 HP unit comes with a pump that will max out @ 60 PSI and you'll need every last one of those PSI if in your engine is at 600 HP. I don't think 40 will be enough for the FiTech unit, the mentioned one needs at least 45 PSI for an under 600 HP engine.
  11. Philip66

    Philip66 Well-Known Member

    I just pulled 40 out of the air, and my next sentence says "whatever you need for FI."
    I was in no way trying to limit the system at 40. My point was that it can be used with a carb or fuel injection as long as you have the correct regulator.
    Sorry for any confusion!!
  12. 300sbb_overkill

    300sbb_overkill WWG1WGA. MAGA

    That's ok, he'll know what to check for if he looks into the unit you have now.

    Cool truck in your avatar by the way, is that the '54 in your list?
  13. Philip66

    Philip66 Well-Known Member

    You are the first person to ask about that avatar!!

    It's actually a 1956 Mack B-61. I bought it as a dump truck and am in the process of turning it into a street cruiser. I set it on a 2005 GMC 2500 HD chassis with a Duramax Diesel/Allison Trans., 4X4, 4 wheel disc brakes, independent front susp., etc!! My father in-law had Mack's back I the day and I always loved the style. The cab is fat and round and reminds me of an old 47 Chevy and I figured it would make a cool ride!! I'll have to do a build thread later, and not hijack this one.
    300sbb_overkill likes this.
  14. sriley531

    sriley531 Buckle up, this could get rough....

    Fitech unit takes 58psi and has an integral regulator.

    I've got a few questions out to some pump manufacturers, so the research continues!!
  15. Ken Warner

    Ken Warner Stand-up Philosopher

    Sean. The Meanstreet 800 actually runs at 43psi (at least its supposed to) but it does run just fine at 58PSI. I am NOT a fan of external fuel pumps. Have been reading about these aftermarket EFI systems for about 7-8 years now and the failure rate with external pumps is just too high. My vote is to go with a tanks inc setup with a 340GPH pump. The regulator in the FiTech will take care of the flow at that level but you may need more volume with nitrous. You obviously will need to get some reducers etc due to your -8 fuel line setup and the FiTech being -6 all around but that's not the end of the world. I'm guessing we will need to piece together a full length return to the tank as well as distribution for the nitrous. I'm looking forward to nicer weather and helping you get the system installed.
    sriley531 likes this.
  16. sriley531

    sriley531 Buckle up, this could get rough....

    Thats interesting Ken, the Fitech literature calls out 58psi. Regardless, whatever route I take will be able to handle either either case so it wont be an issue. I really appreciate your (future) help. I'm looking forward to picking your brain on the settings (when I finally get to that part), I have a lot learn but can't wait to dig into it.

    I spoke to fitech support yesterday about the 6an vs 8an thing, they said its a non-issue, just adapt it how I see fit. I'm leaning towards the tanks inc piece as the fitech in-tank pump is fairly new and not a lot of feedback as of yet, the tanks inc pump has a little more proven track record. I'll likely install their separate sending unit as well and just sell my robbmc 1/2" pickup (along with my robbmc 1100hp mechanical pump and holley carb) here once the transition is complete. Part of me says I'm nuts to take off a fuel/induction system thats working so well, but the allure of the fitech system was too much and I bit hook line and sinker on the hype....
    OHC JOE likes this.
  17. Ken Warner

    Ken Warner Stand-up Philosopher

    Yeah I was nearly kicked from the FiTech facebook page over a rant I posted when it came out that the 400 and 800 hp units are supposed to be equipped with a 43PSI regulator when all of the literature says 58PSI. Truth of the matter is the units appear to be able to run at either pressure level. (I ran my 800 all year at 58PSI) Theoretically the Meanstreet 800 at 58PSI should be capable of almost 1200hp. The 1200 hp unit is the same throttle body and same injectors just running the higher pressure and the ECU has timing control and other features built in. Part of the reason I was so cranky when the 43PSI thing came out is because I had replaced the regulator in my unit just about 2 weeks before that info dropped. The Bosch 58PSI regulator was only like $16 off Amazon and it took all of 2 min to swap it but I was not happy that something as basic as working pressure was not properly documented!

    If you want to start planning out fuel lines and such before the thaw just give me a call and I'll drop by.
  18. Bens99gtp

    Bens99gtp Well-Known Member

    I 2nd the areomotive sysytems. Used seveal like I think it's 475 for a 340 lpH and 730 for the 680 lph. Jit pop the whole and install, pretty low profile, has spot for return
  19. OHC JOE


    I'm thinking also of running the tanks Inc set up when I do mine on my 67 impala
    Maybe next month
    Freakazoid likes this.
  20. sailbrd

    sailbrd Well-Known Member

    I have done two Fitech systems. Mine has a tanks inc with 450 lph Walbro. The other used A1000 with A1000 regulator. Both have worked fine. Had a sumped tank on my car and hated it. Tanks inc is really nice.

    I would like to know what makes a fuel pump PWM ready. Walbro says that their pumps do not work with PWM.
    OHC JOE likes this.

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