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Fuel Injecting the 3B |
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Pope891 
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Joined: 13 May 2018 Location: Ridgefield, CT Status: Offline Points: 378 |
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 Topic: Fuel Injecting the 3BPosted: 06 June 2023 at 8:49am |
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No stavation yet. It's still good on steep angles too, as long as I've got a full-ish tank.
I used the CPP Universal Fuel Tank Return Line Fitting Install Kit for the return line. I have an external fuel pump from Howell that provides 15 lbs of pressure and 3/8" rubber line (I think).
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bkwudz
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Joined: 27 Feb. 2010 Location: Billerica Ma Status: Offline Points: 514 |
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Posted: 06 June 2023 at 8:27am |
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So after being in storage for a couple years, the 3B is back and getting ready for the NH run, after replacing the old gas with some fresh gas and a new filter the EFI Fhead started right up, and still runs pretty good. It is still plagued with a very random stalling if idling for too long. But it doesn't do it all the time, and back when we were actively tuning and data logging, i could never catch it on the log. It seems to run real well, so i will leave it and see how she does in NH. I am considering switching to the Holley 1barrel sniper, if only for the simplicity of tuning it. Being able to look at the parameters live and make some basic adjustments right there is appealing, i guess we will see how she does
I know you have some miles on yours now, any issues with the fuel starvation using the under seat tank? |
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Pope891
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Joined: 13 May 2018 Location: Ridgefield, CT Status: Offline Points: 378 |
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Posted: 21 Oct. 2020 at 1:45pm |
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Thanks for sharing the info about the fuel line return location (top of the tank vs. the bottom). I'm about to do the same with a stock tank feeding a 4.3 TBI. Good information!
I love the quick connect idea. I might be stealing that idea as well
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drm101
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Joined: 12 Dec. 2012 Location: Clarkston, MI Status: Offline Points: 1471 |
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Posted: 18 Oct. 2020 at 5:32pm |
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Have you seen the hydramat fuel pick ups? I'm curious if that might help with the sucking air issue.
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Dean
'47 CJ2A "Ron" '66 CJ5 "Buckie" The less the Power the More the Force |
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boughtnobuilt
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Joined: 19 Apr. 2020 Location: Santa Rosa, CA Status: Offline Points: 125 |
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Posted: 19 May 2020 at 4:50pm |
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I'd love to go with the sniper, but it's a fitment issue on the intake/head. Cost between Hamilton and Sniper is similar, but Hamilton gives you timing control in that cost where Holley you have to buy another box. I bought a cheap unit from Affordable Fuel Injection and the fitment was all off. So, I'm sending that back. The valve cover is very close to the inlet in the head. For a throttle body to fit, it has to come both up and out - and it can't come up very much or you'll hit the hood with the air filter.
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Anvil
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Joined: 07 June 2017 Location: Colorado Status: Offline Points: 326 |
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Posted: 19 May 2020 at 4:34pm |
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Just out of curiosity, but why a build your own or Hamilton's instead of a Holley Sniper or similiar? Is it a cost or fitment issue, or? I want to do something similar and am just now wading into the research end of the pool.
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boughtnobuilt
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Joined: 19 Apr. 2020 Location: Santa Rosa, CA Status: Offline Points: 125 |
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Posted: 19 May 2020 at 3:24pm |
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Okay, reviving an old thread.
I'm about to commit to Hamilton ($$$$) and wanted to see if anyone here has any updates. I'm going to use the In-Tank fuel pump someone mentioned. that looks great. Just need a bigger hole in the tank and then lots of little holes. We're people able to use the solid throttle linkage? Anyone go to cable? What is the air cleaner used that fits? Are you getting decent coolant temps off that T? Any other places to put the coolant temp sensor? What's the little T with the plastic feed line under the throttle body mounting plate?
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Greaser007
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Joined: 16 Jan. 2018 Location: Anderson, Calif Status: Offline Points: 850 |
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Posted: 02 Sep. 2019 at 7:48pm |
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Nice conversion you've put together there !!
So did the 3/8" hose solve the return pressure from the earlier 5-psi ? Do you have a link to share that was most helpful in determining which components to purchase to do this change-over ? I really like that air cleaner element. Always a nice treat when things fire right up too. With most of the newer auito's all the intake air ducting must be securely fastened on the engine, or it will not run. You will sure be spoiled soon with your instant-starts with the EFI. Len Edited by Greaser007 - 02 Sep. 2019 at 7:52pm |
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bkwudz
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Joined: 27 Feb. 2010 Location: Billerica Ma Status: Offline Points: 514 |
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Posted: 21 Aug. 2019 at 1:52am |
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Making progress, my new top of tank return works, could be because its plumbed better, or maybe returning to the bottom of the tank isn’t the best idea as suggested on the net. Either way my return pressure dropped from 5 to pretty much 0 with the new set up. I also took the time to set up my filter with quick disconnects. So now with the quick disconnects and the shutoff valve i put at bottom of the tank, i can replace my fuel filter in about 2 minutes with no tools and little fuel spillage. I used quick disconnects on the pump too, so i can change that with only a 7/16 wrench to remove the mounting clamp. I pre-made a couple extra fuel filter setups to have handy. The way i figured it, this TBI system is pretty fuel proof, the only real issues involve fuel delivery, likely clogged filters or a bad pump. So by carrying a spare on the trail i can have either of these issues fixed very quickly Now i can log some good data, burn another chip and see how it runs now        |
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P-Mo
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Joined: 03 Sep. 2015 Location: Southwest CO Status: Offline Points: 68 |
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Posted: 17 Aug. 2019 at 4:15am |
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Looks Great! Just a suggestion, but for Hamiltons great FI kit on my 2A, I used the Tanks Inc retro fit sending unit in my tank and it has been flawless since the install. Lots of trips in the San Juans and at Moab with no air being sucked up. Fits under the seat with the supply and return located on the top of the tank.
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Bob3b
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Joined: 08 Mar. 2010 Location: Akron, Ohio Status: Offline Points: 3097 |
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Posted: 13 Aug. 2019 at 6:49pm |
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That's pretty cool right there.
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1946 CJ2A #23881
1953 CJ3b, nice! 1949 Jeepster 1947 Empire Model 90 1985 CJ10A Spen "S" Utility trailer Kubota l3400 |
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mbullism
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Posted: 13 Aug. 2019 at 2:30pm |
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Any progress is good progress
 ...and I thought I was the only one that took the easy way suspecting I'd be redoing something, and then redoing something 
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Those who do not learn from history are doomed to repeat it... Welcome to 1930's Germany
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bkwudz
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Joined: 27 Feb. 2010 Location: Billerica Ma Status: Offline Points: 514 |
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Posted: 13 Aug. 2019 at 2:17pm |
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Been working on the system, install looks good, seems to work well. Even with a bad tune it still runs better than the carb. But You ask " why do i have a bad tune" because i have probably been giving bad data. I have supplied Bill with a couple sets of data and he has made adjustments, but it really has not changed anything for the better. So i looked into it a little more, and it turns out i should have followed Bills install advice a little closer. He suggests after the install, before you spend any time logging any data, check your fuel pressures. The Inlet needs to be around 13 PSI and the return should be petty much 0. So i put a gauge on it, and my inlet is rock steady at 13, but my return is at 5psi, way too high.
The excess pressure in the return causes a rich condition at the injector that cannot be tuned out. Any restrictions in the return throws the custom tune way off. The good news is i know right were my return problem is, i suspected it would be an issue from install, but still took the easy way. I used the drain on the bottom of the stock tank as the return inlet. The fact that its in the bottom isn't the issue, its because its a small fitting, 1/4" with an even smaller actual hole in it. Otherwise the line from the throttle body to the tank is all 5/16", the recommenced size. So i need to find a 90deg 5/16 or even 3/8" bulkhead fitting to install on the top the tank. Then i'll be able to log some good data and go from there.
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BillF
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Joined: 02 Oct. 2005 Location: Hillsborough NH Status: Offline Points: 1133 |
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Posted: 09 Aug. 2019 at 3:22pm |
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Wonder how I could get this to work with the 24 volt system...
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1952 m38
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masscj2a
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Joined: 25 Sep. 2013 Location: Chester Mass Status: Offline Points: 793 |
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Posted: 05 Aug. 2019 at 10:28am |
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Yeh, I'm shocked to hear this coming from you. Your still a solid steel wheel guy. I'm there with you though. Glad Paul is getting all the bugs worked out for the rest of us. Well with exception of the traditionalist guy. But seriously I'm thinking about this for a future part of the 3b. Even though after rebuilding the carb has helped and the electronics distributor helped, there are just too many hills around here to make a really enjoyable long drive. Have to plan your drives based on flatter roads. 😁
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1946 CJ2a Dauntless aka Jalopy
1946 VEC stock 1981 CJ-8 5.3 LS 1966 CJ-6 SBC TUX 1968 CJ-6 225 V6 1974 CJ-6 4.2 1967 M-416 East Coast Modified CJ's |
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otto
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Joined: 26 Feb. 2012 Location: Orygun Status: Offline Points: 2267 |
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Posted: 04 Aug. 2019 at 3:07am |
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Always nice when a plan works out. Let us know how well it runs.
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47 CJ2A w/fuel injected boat engine
48 CJ2A 64 Ford Econoline Travelwagon If you can't get there in a Jeep, get a motorcycle! |
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mbullism
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Posted: 02 Aug. 2019 at 2:50am |
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Those who do not learn from history are doomed to repeat it... Welcome to 1930's Germany
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bkwudz
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Joined: 27 Feb. 2010 Location: Billerica Ma Status: Offline Points: 514 |
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Posted: 02 Aug. 2019 at 1:51am |
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Install is done, everything is secured, and seems to be working well. I need to now take it for a couple good rides to log some data, then we will burn a new chip specific to this jeep and the conditions it operated under. Hopefully tomorrow ill get it on the road and have a seat of the pants feel for how things have improved.
  Edited by bkwudz - 13 Aug. 2019 at 6:59pm |
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Pope891 wrote: