FI Tech "Go EFI 4" Self Tuning Throttle Body Injection Install Thread

Discussion in 'High Tech for Old Iron' started by real82it, Nov 2, 2015.

  1. sriley531

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

    You definitely dont want to go off the (-), MSD's don't work that way. As far as the brown/purple wires, I can't tell you that as thats different from my fitech. But yes, I spliced and run both off the tach signal output, no problems thus far. Again, different system so "your mileage may vary" as they say, but it's the only way I could figure it out and it's worked fine for me.

    NOTNSS Gold Level Contributor

    Definitely appreciate it Shawn. I'll go with the Holley expert on this one. Looks like some minor differences between the brands.
    sriley531 likes this.

    NOTNSS Gold Level Contributor


    NOTNSS Gold Level Contributor

    Tanks Inc EFI.

    I got my EFI tank via EFI Systems Pro but drop shipped from Tanks, Inc. The filler neck is way too long to allow the license plate to close ('70 GS), like 2" or more too long (12" OEM vs. 14" Tanks). The license plate pretty much rests against the gas cap on the OEM tank so obviously a 2" longer neck ain't gonna work. I'm told that this tank is the only one that is built for one specific make, model, and single year (not a range of years), 1970 Buick Skylark/GS and the only one that includes a new neck.

    No, I don't want to cut it off 2" and lose the flare end that goes into the rubber sleeve. I appears as if they forgot to subtract the length of the stub they put on the tank itself.

    Anyone else run into this issue with a Tanks EFI unit? I have the dealer working on contacting Tanks but have not heard back. It's my only holdup on completing the install of the Holley Sniper (I know this thread is FiTech).

    One more: Is an external throttle return spring needed for the EFI units? I had double return springs on my Q-jet.

  5. sriley531

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

    Is the 70 filler neck shorter than the 72? I know it's not an apples to apples comparison, but the neck on my tanks inc tanks fit perfectly (again though, it's a 72)

    NOTNSS Gold Level Contributor

    According to EFI sys pro, the 70 is unique. My 70 OEM is 12" from tank to inlet w/o the cap.

    NOTNSS Gold Level Contributor


    Can you measure the neck on the '72? From the base where it enters the tank to the spout, without cap. It also has a bend on the tank end that is more radical than the slight bend on the OEM on my '70.
    Still have not heard from the dealer so sure he hasn't heard from Tanks.. not too happy since the EFI project is now on hold.

  8. sriley531

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

    Give me a few minutes to get.out to the car and I'll see what I can do for you. Sit tight!
  9. sriley531

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

    So from the tank base to the end of the neck (linearly, so not taking into account the bend, just a straight line) it measures right about 11-3/4" -ish. I cant be sure if the neck is seated all the way into the rubber hose (see pick below) but it should be close. *Note*- the pic shows pointing out the middle of the connector, but the 11-3/4" dimension was where the tube entered the tank.

  10. NOTNSS

    NOTNSS Gold Level Contributor

    Thanks Shawn. Same as mine it seems. What the difference is between '70-2 is beyond me. Maybe I'm just a dope.. I'll install the tank in the next day or two and with it in place will shoehorn the filler neck on to see where I'm at. If it works I'll make up a story of how it was someone else's fault.. LOL!!
    sriley531 likes this.
  11. Ken Warner

    Ken Warner Stand-up Philosopher

    The Spectra Premium tanks (which i have) have a filler neck that is a couple inches too long. I cut a section out and spliced it back together with fuel rated appropriate diameter hose with 4 hose clamps for security. Or you can find someone thats good at brazing and they can swap the filler neck.
    300sbb_overkill likes this.
  12. NOTNSS

    NOTNSS Gold Level Contributor

    Tanks is working on a new neck for me but in the meantime I simply cut the OEM neck at 9", stuffed it in the rubber sleeve on the new tank and boom, I'm at 11 - 11 1/2" total length from the tank. OEM was 12" but the cap hit the plate when closed so good to go. The Tanks neck was 14" from tank to cap. Just fair warning.
    Even though it's resolved I'm going to let them go thru the motions on a correct filler for the '70 so maybe the next guy won't get the same surprise. I will say Chris at EFI System Pro pushed to get this taken care of so my hat is off to him. All's well that ends well.
    Harlockssx likes this.
  13. NOTNSS

    NOTNSS Gold Level Contributor

    I guess I've kinda hijacked the FiTech thread with Holley Sniper.. sorry. Maybe they should be broken out separately.

    Still have a question tho':

    Page 10 of the Sniper manual under Sensor Verification says in bold, "If ignition box or distributor has the ability to send rpm signals with initial key on (such as Tach Sweep or REV Limiter Verification), these setting must be disabled. Reference ignition system instructions".

    I've looked over the MSD manual online .pdf and find nothing of these features or whether it sends these signals with key on. The 6AL has the Rev Limiter 'Pills'.

    I'm hoping one of you knows for certain what or if I need to do anything with the MSD before initial startup with the Sniper.

  14. NOTNSS

    NOTNSS Gold Level Contributor

  15. 300sbb_overkill

    300sbb_overkill WWG1WGA. MAGA

    Why's that? Bruno is in his early 80s and is still racing and my neighbor's dad is 87 and is still going to the track to run his cars!

    I don't see why you shouldn't have at least another 20 years of racing left in you as long as you're still alive anyway, unless you're getting tired of it that is?
  16. NOTNSS

    NOTNSS Gold Level Contributor

    Age isn't the issue. Minimum 125 mi. one way travel for an 8th mile track and 250+ for 1/4. That and I don't want to beat my car while learning to speed shift the Tremec. Looking more toward road trips around the West with some tunes and an occasional blast at speed.
    300sbb_overkill likes this.
  17. 1973gs

    1973gs Well-Known Member

    My FAST said to use a box that didn't have a rev limiter so I used a MSD 6a. I just use the Fast rev limiter.
  18. austxsteve

    austxsteve Well-Known Member

    (Sorry to change the thread too) but does anyone know in the very first post with the photos, what tire/wheel package is n the GSX? I've emailed but have not received a response. Curious of the size, backspace, tire choice.
  19. NOTNSS

    NOTNSS Gold Level Contributor

  20. NOTNSS

    NOTNSS Gold Level Contributor

    First 10 mi. with the Holley Sniper on the 455. Amazing difference all around, feels like a new engine (got a Whoa! out of me) with throttle response, quick to rpm to 4k (no WOT yet) with good AFR numbers for the most part. Lots of 'learning' for it to do yet but first impression is outstanding.. hope it stays that way. Ran 170* at 35 and 70 on 90* ambient temp. Timing MSD at 14/32.
    Only one glitch on initial startup.. leak at the last fitting into the Holley. Found a 90*-6AN fitting wasn't sealing/seating (Chinese of course) so replaced it and voila. Didn't even notice the electric pump running on a mild cruise (in-tank). FYI tanks does not seem to have the correct filler for the '70 GS, they tried twice. I cut the OEM off at 9.5" and stuffed it in the supplied rubber boot, works fine.
    As for the progressive linkage - I don't think I'll need it, even with the Tremec 5spd. Just a matter of flat pedal and clutch control. One less thing to monkey up the works (Holley does not support the progressive linkage I'm told). No whistle to report either, which is a common complaint, so won't be adding a spacer. Either I'm lucky or just did something right.
    Not counting my chickens just yet. Lots of learning to come for the ECM and the operator so will post as it goes if anybody

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