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12-21-2021, 04:11 PM | #101 | |
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Re: Let's start a junkyard fuel injection discussion
Quote:
Cheers
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1949 Ford F-47 with a '51 8BA Flatty, GM TBI fuel injection system, and a grey shop cat, Spot. |
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12-21-2021, 06:55 PM | #102 |
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Location: Rochester, NY
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Re: Let's start a junkyard fuel injection discussion
Awesome! I hope you like it too! I think it looks so much better than the plastic corrugated stuff. I usually cut it and punch holes w a junk soldering iron, since it IS stranded plastic despite looking like cloth
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12-21-2021, 10:53 PM | #103 |
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Re: Let's start a junkyard fuel injection discussion
I know I have published a number of these updates, but it's just so much fun seeing this engine run as well as it does...can hardly wait to drive it in the spring.
If anyone wants to try this I am willing to help out with the details...while it's still fresh in this old brain. Cheers https://www.dropbox.com/s/7h501pl5cp..._1481.MOV?dl=0
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1949 Ford F-47 with a '51 8BA Flatty, GM TBI fuel injection system, and a grey shop cat, Spot. |
02-01-2022, 11:55 AM | #104 | |
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Re: Let's start a junkyard fuel injection discussion
Quote:
Great setup Ken! How did you connect the throttle bodies to your manifold? Saw in another picture that it's a normal flathead 2-carb manifold. What 3-hole carb adaptors did you use and how did you attach the throttle bodies? Last edited by SoCalCoupe; 02-01-2022 at 12:07 PM. |
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02-02-2022, 09:40 AM | #105 |
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Re: Let's start a junkyard fuel injection discussion
Thanks! They are Thickstun adapters that I got on ebay, designed for mounting a holley or stromberg 3 bolt carb onto a one barrel intake manifold (2 bolt). I had a friend in the machine shop cut off the mounting ears on the 1 barrel side and turn down the inside and outside diameter to match the throttle bodies I had in mine. The throttle bodies are mounted to the adapter with rubber hoses and hose clamps, similar to some motorcycle setups.
With two one barrel throttle bodies squirting into both planes of the intake manifold, both injectors have to operate at the same time (once for every ignition event) to get an even fuel distribution to the cylinders. There is simply not much time to get enough fuel in at WOT and "high" RPMs (4000 rpm = 3.75 ms between ignition events). You can use high-flowing injectors but they can have trouble idling well due to the very short on time. I solved this by adding a set of secondary injectors, perched above the velocity stacks, that come on when needed. Better yet would be a system with 2 barrel throttle bodies that maintains the separation between intake planes. The you have 7.5 ms to get the fuel in... 6281357E-DA50-4FCF-AA98-DFAC266ABB9D by kenhenry_06268, on Flickr 85263390-22BA-409C-B463-E67B4E81D095 by kenhenry_06268, on Flickr |
02-02-2022, 10:31 AM | #106 |
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Re: Let's start a junkyard fuel injection discussion
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1949 Ford F-47 with a '51 8BA Flatty, GM TBI fuel injection system, and a grey shop cat, Spot. |
02-02-2022, 11:45 AM | #107 |
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Re: Let's start a junkyard fuel injection discussion
Wow!
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02-02-2022, 03:33 PM | #108 | |
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Re: Let's start a junkyard fuel injection discussion
Quote:
Awesome! Thanks for the additional information. Easy to see how that interface would work well. Just need to find a local shop to do the work to match the throttle bodies. |
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02-15-2022, 04:51 PM | #109 |
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Location: Detroit, MI
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Re: Let's start a junkyard fuel injection discussion
Kilohertz,
I was not expecting to find this cool thread, but I'm certainly glad I did. I'd love to do something similar on my 8Ba. I'm going to have to dig deeper into this. Nice work. |
02-15-2022, 07:38 PM | #110 | |
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Re: Let's start a junkyard fuel injection discussion
Quote:
Stay tuned. Cheers https://www.dropbox.com/s/nj7755ypdh..._1442.MOV?dl=0 https://drive.google.com/file/d/1qv6...ew?usp=sharing
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1949 Ford F-47 with a '51 8BA Flatty, GM TBI fuel injection system, and a grey shop cat, Spot. Last edited by Kilohertz; 02-15-2022 at 08:31 PM. |
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02-15-2022, 09:20 PM | #111 |
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Location: Rochester, NY
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Re: Let's start a junkyard fuel injection discussion
Looks fantastic! Did you end up trying the classic braid wire wrap? I’m having two a “TBI” holley 94 carb tops printed for my setup. Will post back with photos when they arrive.
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02-15-2022, 10:58 PM | #112 | |
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Re: Let's start a junkyard fuel injection discussion
Quote:
Yes, classic braid...$240, but there's enough to do several vehicles, maybe more. It's best cut with a hot wire as scissors just mangle the ends. cheers
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1949 Ford F-47 with a '51 8BA Flatty, GM TBI fuel injection system, and a grey shop cat, Spot. Last edited by Kilohertz; 02-16-2022 at 02:25 PM. |
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02-16-2022, 12:43 PM | #113 | |
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Re: Let's start a junkyard fuel injection discussion
Quote:
I am speaking for the Forum discussion thread. This is a forum. The OP stated he wanted to start a discussion. Everybody joins in to a discussion. You have the option to send a personal message if you don't want others to comment. |
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02-16-2022, 02:27 PM | #114 | |
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Re: Let's start a junkyard fuel injection discussion
Quote:
cheers
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1949 Ford F-47 with a '51 8BA Flatty, GM TBI fuel injection system, and a grey shop cat, Spot. |
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03-01-2022, 09:23 AM | #115 |
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Re: Let's start a junkyard fuel injection discussion
And here we have a Holley 94 carb partially converted to a TBI unit using a custom 3d printed air horn. The material is nylon PA12, resistant to high temperatures and very strong and rigid. It cost about $75 to be done by a commercial printer (Shapeways.com). This setup will allow me to retain the stock choke cable to control the idle speed and take full advantage of the dual plane manifold design. A fuel rail will be mounted above the air horn with two fuel injectors in it sort of like a GM TBI. More pictures to come in the next few days once I get the fuel rail cut and drilled!! Ken
B74D07A6-EFF3-48E0-9606-FAC2E0025CCE by kenhenry_06268, on Flickr CF8EA0E2-67E9-4BB2-94E9-6F0AF501FB06 by kenhenry_06268, on Flickr 02863C07-B01E-46DA-869B-8337226745E0 by kenhenry_06268, on Flickr |
03-01-2022, 10:10 AM | #116 |
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Re: Let's start a junkyard fuel injection discussion
That's brilliant Ken! Nice work!!
What injectors are you planning to use and what fuel pressure? Is it MegaSquirt control? Looking forward to seeing the next phase. cheers
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1949 Ford F-47 with a '51 8BA Flatty, GM TBI fuel injection system, and a grey shop cat, Spot. |
03-01-2022, 10:40 AM | #117 |
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Re: Let's start a junkyard fuel injection discussion
Thanks! The fuel injectors are high impedance from a BMW S1000RR motorcycle and supposedly flow 22.8 pounds/hr (240 cc/min) at my fuel pressure of 43.5 psi. I will measure it confirm though, as well as estimate the dead time since that is an important parameter for megasquirt. I'll will continue using my dual carb intake (so 4 injectors total) and distributorless ignition system with the megasquirt controller. Ken
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03-16-2022, 11:22 AM | #118 |
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Re: Let's start a junkyard fuel injection discussion
Thanks Kilohertz for directing me to this thread. So much ingenuity, and crafty ways of adapting parts to each other.
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03-26-2022, 01:22 PM | #119 |
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Re: Let's start a junkyard fuel injection discussion
Since 2015 I've been running 2 - 1988 Ford Escort 2.0 liter TBI's on my flathead V8 with mega squirt II software. I used 3/8" thick aluminum plate adapters mounted to 2 Stromberg 97 bases on an Offenhauser super dual manifold.
I figured a standard 239 cu inch flathead is 3.92 liters, so 2 TBI's from 1988 2.0 liter 4 cylinder engines would be a good match. Oh and an OEM TBI will run about $150 on EBAY....well it did in 2019. |
03-26-2022, 09:43 PM | #120 |
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Re: Let's start a junkyard fuel injection discussion
ken-r-mer,
That sounds cool, could you post some pics? Would love to see it. Cheers
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1949 Ford F-47 with a '51 8BA Flatty, GM TBI fuel injection system, and a grey shop cat, Spot. |
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