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PostPosted: Tue May 01, 2018 10:31 am 
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Turbo EFI
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Joined: Wed Nov 23, 2011 11:07 am
Posts: 1971
Location: SF Bay Area
Car Model*: 67 dart 2 door hardtop
FYI, I run an electric fuel pump to the sump pump for the FiTech TBI, the fuel circulates through the sump and back to the tank (see above posts for details). Anyway, the other day I was working on my lights and I turned off the electric fuel pump. I left for work on Monday and forgot to turn the pump back on; my gas tank was above 1/2 full. I drove for about 40 miles and suddenly my car died, then I quickly realized it was the fuel pump. I flipped the switch back on and off I went (didn't actually stop, just coasted for a bit).

The point is that the sump pump was drawing gas from the gas tank without the electric fuel pump pushing it through the sump, at least while the tank was over 1/2 full. Once I got below half it was starved briefly until I turned on the electric fuel pump.

Just thought I'd share this. If you electric fuel pump were to fail in this configuration and you had more than 1/2 tank, you could go for 40 miles or so (full tank likely further) with this setup.

Brian

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PostPosted: Tue May 01, 2018 11:32 am 
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Board Sponsor & Moderator
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Joined: Mon Oct 21, 2002 11:08 am
Posts: 12532
Location: Blacksburg, VA
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Interesting, and sensible... Your sump pump would pull some vacuum on the feed line coming from the tank.

Lou

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PostPosted: Tue May 22, 2018 8:18 pm 
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Turbo EFI
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Joined: Wed Nov 23, 2011 11:07 am
Posts: 1971
Location: SF Bay Area
Car Model*: 67 dart 2 door hardtop
NOTE: my FiTech is working very well, good response, cold starts instantly. If I'm driving and the engine is fully warmed up, shut off the engine, then let it sit for say an hour, then try to restart there is some heat soak...sort of. If you try to start, it'll crank and crank for 10-20 of seconds. But, you don't need to crank during this period, if you simply wait for 20 seconds, the sump's 50-60 psi will overcome the vapor and the injectors will finally get gas and you're good to go, starts right up. This only occurs after shutdown from full heat and waiting about an hour. Less than an hour, no problem, starts right up; more than an hour, no problem, starts right up. It's all that cast iron in the exhaust manifolds, lots of heat transferred to the TBI. It gets pretty hot after shutdown.

brian

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PostPosted: Tue May 22, 2018 8:28 pm 
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Turbo EFI
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Joined: Wed Nov 23, 2011 11:07 am
Posts: 1971
Location: SF Bay Area
Car Model*: 67 dart 2 door hardtop
I do have a heat shield under the TBI and a 1/2" wood spacer, fyi.

See here: https://www.flickr.com/photos/151192512 ... 472337343/

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PostPosted: Sun Sep 16, 2018 1:18 pm 
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2 BBL ''SuperSix''

Joined: Thu Mar 30, 2017 4:52 am
Posts: 19
Location: Santa Clara ca ..
Car Model*: 1970 Dart Swinger ( mod top clone ) Slanty w/auto
hay Brain

I pm you i have a few ? about the tuning on the set up ...
Do you take phone calls ...

Thanks
David


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PostPosted: Sun Sep 16, 2018 7:02 pm 
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Turbo EFI
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Joined: Wed Nov 23, 2011 11:07 am
Posts: 1971
Location: SF Bay Area
Car Model*: 67 dart 2 door hardtop
David,

Responded to your PM.

B

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