TBI For the 74

[slammed427]

Came across a few good craigslist deals this morning, I picked up an edlebrock aluminum tbi manifold and a stick shift pcm. I then ordered a new 20gal tbi tank from Oreilly.

I've decided to swap out my qjet for injection, now with the parts I listed above, can anyone give me a hard parts list, of what else I'm going to need? I'd like to get the rest of my parts together and get this swap done over my thanksgiving data off from work.

I was going to ls swap this truck, but this engine just runs too good to rip it out. And my 88 got sold this morning for double what I had into it, a hard deal to say no to.
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[Jonboy]

The TBI fuel sender is a little pricy; I would use an inline pump and cancel your fuel tank order. The fuel neck is also larger on the later tank, makes for a PITA to adapt that to your existing neck. I would also look into getting a new stand alone harness, I got mine from www.fuelinjectionconnection for $245, and you don't have to worry about the connectors being old and brittle. Make a pick a part run and score a throttle body, ESC module, distributor and coil, throttle cable and brackets from a 350 TBI truck or van and you should be good.

[slammed427]

What about o2 sensors? Should I find a set of manifolds while I'm there?
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[Desert1957]

Originally Posted by slammed427

What about o2 sensors? Should I find a set of manifolds while I'm there?
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My 87 only has one 02 sensor, its one wire that's all you need. makes it a little easier.

Desert

[C-10 simplex]

Even though it may be debatable if the mpg increase would be worth the change, suggest calling these guys for one stop shopping, expediency, and advice:

http://howellefi.com/

[MalibuSSwagon]

Your MPG increase may not be much, but the driveablity of EFI is worth the change all day.

[C-10 simplex]

Generally agree as i have a tbi car.

However, my next conern would be ease and cheapness of diagnostics and repair. My nod would go to carbs and that's why i prefer them.

[Desert1957]

Originally Posted by C-10 simplex

Even though it may be debatable if the mpg increase would be worth the change, suggest calling these guys for one stop shopping, expediency, and advice:

http://howellefi.com/

I strongly disagree with this statement about the mileage, I can tell you from practical experience my Duallys that had carbs got 5-6 MPG, and my TBI engines got 10-12. That makes it well worth it at $4.00 a gallon IMO.

Desert

[slammed427]

Originally Posted by Desert1957

I strongly disagree with this statement about the mileage, I can tell you from practical experience my Duallys that had carbs got 5-6 MPG, and my TBI engines got 10-12. That makes it well worth it at $4.00 a gallon IMO.

Desert

I can attest to that, my 91 gmc dually and my 92 dually, both 454's pulled 10-12.

I'm forecasting,18-20mpg with the swap and a 5 speed. We shall see as things progress.
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[Jonboy]

I just took the truck to a muffler shop and had a bung welded in to the driver's side down pipe. Do it before you do the conversion and thread the O2 sensor in. Done

Something else I forgot is the VSS. I used a VSS from Stealth Conversions, the 2 PRS. It senda a 2000 pulse per mile signal. You will also need to change out your neutral safety switch for an '87 one that has a Park/neutral signal as well
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[slammed427]

Do I need the vss deal right away? I was planning on swapping in a 5 speed at tax time and converting to a electronic speedo then.
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[Jonboy]

You will need it right away. The nice thing about the stealth part is that it goes in line with the speedo cable. You can keep your original gauges.
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[slammed427]

My plan being for the tbi swap is the reliability, plus when coupled with a 5 speed, and the 3.42 rear end I have in the truck, should see some fuel mileage increases. The 5 speed will come with my tax return, and I'd like to have the tbi done before then.
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[slammed427]

And I agree about the inline pump, our gets too hot here in Tempe to not use an intank. Thats why I ordered the efi tank, sender will be next.
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[Firebirdjones]

Originally Posted by slammed427

And I agree about the inline pump, our gets too hot here in Tempe to not use an intank. Thats why I ordered the efi tank, sender will be next.
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Yeah, I seemed to have more issues when I made trips to Phoenix