Boosted Willys - F134 Engine Swap with a twist |
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bkwudz
Member Joined: 27 Feb. 2010 Location: Billerica Ma Status: Offline Points: 514 |
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unclemoak
Member Joined: 06 Oct. 2018 Location: Englewood, CO Status: Offline Points: 352 |
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bkwudz
Member Joined: 27 Feb. 2010 Location: Billerica Ma Status: Offline Points: 514 |
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Line closer to the valve cover is the supply
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unclemoak
Member Joined: 06 Oct. 2018 Location: Englewood, CO Status: Offline Points: 352 |
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Here are some pictures of the TBI bonnet casting that I managed to find while randomly browsing eBay. Per the description, it was made for industrial applications of the GM 2.5L Iron Duke (the host engine I got the TBI unit off of) to use for propane injection.
It'll take some finish machining, but should make a nice compact packaged to get the TBI to clear the hood and contain the pressurized intake air from the super charger. |
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Greaser007
Member Joined: 16 Jan. 2018 Location: Anderson, Calif Status: Offline Points: 850 |
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It is always very gratifying when we can put a dream into reality.
And I liked the note where that one guy was twisting his F-head to 8k rpms. 8k rpms is nothing for an overhead cam Honda 4-banger. Anymore the little 4-cyl engines of today are capable of high rpms use. As I wander through Pick-n-Pull recycler yards there are likely EFI Donor's everywhere we look. But most of the throttle body units are pre-multi port, and '90's vintage mostly. |
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Bob3b
Member Joined: 08 Mar. 2010 Location: Akron, Ohio Status: Offline Points: 3095 |
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There is a guy here locally that is not on the internet but comes to the spring reunion who has an fhead putting out 125 HP. He made a lot of his own stuff for it too.
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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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unclemoak
Member Joined: 06 Oct. 2018 Location: Englewood, CO Status: Offline Points: 352 |
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Do you have his contact information? I’d love to give him a call and pick his brain.
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Jw60
Member Joined: 17 Jan. 2018 Location: Missouri Status: Offline Points: 129 |
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I am a bit concerned that bonnet casting looks restrictive. your forcing air to make a 90 up and over the tbi in a tight enclosure. A larger plenum might be in order.
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unclemoak
Member Joined: 06 Oct. 2018 Location: Englewood, CO Status: Offline Points: 352 |
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Some bad news is that I found someone else with an F head in there low hood, and it seems they only have 4" of hood clearance, which differs from from the 5.5" that I had read somewhere else. The good news is I did score another free F134 that turns over. I've also been doing some research on some customer rocker arms. I've heard that the few people that have experimented with using an L134 cam (to get more intake lift) have ended up breaking there rocker arms. So to try to curb this, I'm looking into having a custom set up rocker arms made after reading this article. So I'll be curious to see what T&D Machine has to say and if they're willing to take on the project. T&D Machine - http://tdmach.com/ Here are some stock F134 valve train parts that I had to rob off one of the junk engines I have for another M38A1 I'm working on. Here's what they look like installed on the head. |
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Mark W.
Member Sponsor Member Joined: 09 Nov. 2014 Location: Silverton, OR Status: Offline Points: 7923 |
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Ive measured a F head in a low hood for clearance and the 5.5" sounds about right. Have you actually checked your clearance or just going off what you read?
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Chug A Lug
1948 2A Body Customized 1949 3A W/S 1957 CJ5 Frame Modified Late 50's 134L 9.25"clutch T90A D18 (1.25") D44/30 flanged E-Locker D25 5.38 Since 1962 |
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unclemoak
Member Joined: 06 Oct. 2018 Location: Englewood, CO Status: Offline Points: 352 |
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I have no means to measure it myself without actually putting one of my spare engines in to get a measurement. This thread is where I read the 5.5-6” measurement. Edited by unclemoak - 28 Jan. 2020 at 2:06pm |
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unclemoak
Member Joined: 06 Oct. 2018 Location: Englewood, CO Status: Offline Points: 352 |
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T&D machine got back to me already.
Sounds like they can make me a set of rockers, just have to supply them a head with the valve train.
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unclemoak
Member Joined: 06 Oct. 2018 Location: Englewood, CO Status: Offline Points: 352 |
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Little slow on the updates. Been really busy with work and my machine shop.
A few updates: 1. Building up a carbed engine for summer fun while I work on the EFI/boosted engine.
2. Have a lead on getting roller rockers made 3. Decided to build an engine run stand to dial in these engines prior to putting them in the jeep to save some hassle of taking it in and out and making everything easily accessible. 4. Got my converted distributor back from Hamiliton with the V/R sensor in it. 5. I've been looking at valve seals. Seems while browsing Summit racing, I found these: They appear to work with the stock 0.373" valve stems and the 0.625 valve guides. So I might be in luck that these will work fine without modification to the head or valves.
Edited by unclemoak - 10 Apr. 2020 at 4:12am |
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Anvil
Member Joined: 07 June 2017 Location: Colorado Status: Offline Points: 326 |
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Very interested in this. I'd been doing a small amount of research into doing something similar with the L134. Rotrex ( https://www.rotrex.com/) makes a line of very small & compact centrifugal superchargers that would be excellent for this application.
Specifically: https://rotrex.com/wp-content/uploads/2018/12/Rotrex-Technical-Datasheet-C15-Range.pdf Not cheap though. Somewhere in the neighborhood of $2K.
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Jw60
Member Joined: 17 Jan. 2018 Location: Missouri Status: Offline Points: 129 |
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Sounds like you're sealing the intake valve guides and stems on the head. I'm interested to see what you find for the exhaust.
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unclemoak
Member Joined: 06 Oct. 2018 Location: Englewood, CO Status: Offline Points: 352 |
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The OD of the guides is just a hair too big. I'll have to find some new ones to turn down. |
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unclemoak
Member Joined: 06 Oct. 2018 Location: Englewood, CO Status: Offline Points: 352 |
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Just got off the phone with Clifford Performance. Ordered a header, and they are going to grind a cam for me.
Larry suggested that a Weber 32/36 might be a good option to unleash some power in these, but I have some concerns with it fitting under the low hood. Some light googling didn't yield any height dimensions, so I'll have to look more later.
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Anvil
Member Joined: 07 June 2017 Location: Colorado Status: Offline Points: 326 |
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Depending on the size of the seal & valve guide, you can buy a cutter to turn the guides down. Here's a link to some options: |
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