Going Supersonic, Texas version.. |
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Lee MN
Member Joined: 13 Aug. 2008 Location: Harris, MN Status: Online Points: 4923 |
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A A Supersonic engine has a tag by the dist. rivited to the block that says Kaiser Supersonic, it will have a vaccume advance dist the SAME diamiter as the regular 2A not the small size, The head is obvious, the intake manifold is different as the carb sits 90 degrees from the standard L-head manifold and is fitted with a Carter YF with a straight top this setup also uses a completely different throttle linkage, also the Kaiser starter has a solenoid mounted on top. This setup appears to be mutch like the L-head Jeepster setup, does anyone know what head the Jeepster came with?
Lee |
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LEE
44 GPW-The Perfected Willys 49 2A “If you wait, you only get older” 67 M715 American Made Rolling History |
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PhillipM
Member Joined: 28 May 2012 Location: Jackson, MS Status: Offline Points: 560 |
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It's been years, but I used denatured alcohol with the head surface perfectly level to cc chambers. Alcohol lays flat in the combustion chamber because it doesn't have the surface tension of water. I used denatured because it's not worth wasting good bouron!
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"90% of all carburetor problems are electrical"
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Bill2A
Member Joined: 01 Mar. 2018 Location: Fort Worth, Tex Status: Offline Points: 516 |
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All this makes me wonder just how much material there is to be milled, on the bottom side of the head.
Was it cast with the same amount and then milled further or was the Supersonic cast with the same amount at the revised thickness? How thick does it need to be before it starts being likely to crack? Didn't someone make an 8/1 aluminum head?
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1946 CJ2A 14098
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autolite
Member Joined: 15 Apr. 2006 Location: San Mateo, Cali Status: Offline Points: 788 |
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Believed it was called a Hickey Head.
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willys jeep
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Mike S
Member Joined: 20 May 2006 Location: West Coast Status: Offline Points: 2318 |
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The head on my Jeep engine CC's at 73 cc. It is a milled stock ribbed Willys head. I had another that was nearly stock and about 10 cc more in volume. The 73cc head is in my (kinda) stock L134 and it runs like a top.
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'47 CJ2A -- #114542
Warn FF D41 rear Lock-Right locker 11" drum brakes Dual master cylinder T90C Transmission 16 X 6 Jeep truck wheels Cooper STT Pro tires |
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leecarr
Member Joined: 27 Sep. 2016 Location: Massachusetts Status: Offline Points: 910 |
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I have 2 complete super sonics, according to the number the one in the picture came from a 1952 Henry J, I swapped the intake and carb to the correct one for the jeep, it runs good still have a few carburetor issues though.
Edited by leecarr - 11 Aug. 2018 at 11:07pm |
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Stev
Member Sponsor Member Joined: 27 July 2016 Location: Cincinnati Status: Offline Points: 2383 |
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Reading this thread - is it correct to conclude by changing to the Supersonic head, a standard L134 will go from 62 hp to 68 hp at Sea Level?
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Stev
1946 CJ2A Trail Jeep (The Saint), 1948 CJ2A Lefty Restored |
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Ol' Unreliable
Member Joined: 25 Sep. 2016 Location: CO Springs CO Status: Offline Points: 4226 |
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If the internals of the engine are up to snuff, just increasing the compression ratio should give the added HP.
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There's a reason it's called Ol' Unreliable
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Stev
Member Sponsor Member Joined: 27 July 2016 Location: Cincinnati Status: Offline Points: 2383 |
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Oh Yea! I have a Supersonic head on my running spare engine! The Saint just might go Supersonic at some point.
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Stev
1946 CJ2A Trail Jeep (The Saint), 1948 CJ2A Lefty Restored |
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Lee MN
Member Joined: 13 Aug. 2008 Location: Harris, MN Status: Online Points: 4923 |
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You would most likely need the intake and larger "YF" Carburator to get the full "SuperSonic" advantage! Lee |
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LEE
44 GPW-The Perfected Willys 49 2A “If you wait, you only get older” 67 M715 American Made Rolling History |
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Stev
Member Sponsor Member Joined: 27 July 2016 Location: Cincinnati Status: Offline Points: 2383 |
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Lee,
That would require some research. The WO Carb float is orientated so the float works when the Jeep is climbing. I don't know anything about the YF. Or how it would work.
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Stev
1946 CJ2A Trail Jeep (The Saint), 1948 CJ2A Lefty Restored |
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Lee MN
Member Joined: 13 Aug. 2008 Location: Harris, MN Status: Online Points: 4923 |
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I did not consider that!, valid point but the increase in HP of the supersonic is by way of the complete setup!, not sure the head alone is worth 8 hp..... most likely of more value at Bonneville than Pikes Peak! and I've done Pikes Peak stock! and pushed the speed limit going up Lee |
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LEE
44 GPW-The Perfected Willys 49 2A “If you wait, you only get older” 67 M715 American Made Rolling History |
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smfulle
Member Sponsor Member Joined: 16 Sep. 2010 Location: Ogden, Utah Status: Offline Points: 6123 |
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Doesn't count because your jeep has been infused with special jeep magic that only people from Minnesota have access to that makes it the fastest stock Willys every.
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jpet
Moderator Group Sponsor Member x 5 Joined: 30 Apr. 2008 Location: Ramsey, IL Status: Offline Points: 11173 |
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Dad's jeep is one of the fastest stock jeeps I have ever seen
I don't know if this means anything or not. Back when I had my '45 2A "Arizona", I noticed that it had significant power compared to GW. At the time, I didn't know what a supersonic head was. Jeep had stock carb and Supersonic head. In a conversation with Louie Larson 10 years ago, he suggested milling .100 off of a stock head to get more power but he also mentioned that the engine may run hotter. |
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CJ2A #29110 "General Willys"
MB #204827 "BAM BAM" "We do what we can, and we try what we can't" |
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TateC
Member Joined: 23 Feb. 2018 Location: SLC, Utah Status: Offline Points: 510 |
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What ever happened to Arizona anyway? Sorry to sidetrack this thread.
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Tate Christensen
1941 Ford GP #9687 1943 Willys MB #263100 1944 Ford GPW #234613 1945 Willys CJ2A #10226 |
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Unkamonkey
Member Joined: 23 Mar. 2016 Location: Greeley CO Status: Offline Points: 2093 |
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You can get a L head to have a lot of power. We could outrun F heads but we could never manage to keep the oil in the beast.
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uncamonkey
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Lee MN
Member Joined: 13 Aug. 2008 Location: Harris, MN Status: Online Points: 4923 |
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I for the most part agree! , I spent much time "Going SuperSonic" and after considering the "Little Gain" and a trip to Colorado, I decided I would rather have the stock reliability! ..... I do not believe Dads Jeep is the fastest I'm probably willing to push more than most, but I will say the fresh engine last year is now "Broke Inn", so keep an eye in your rear view mirror, I may be coming! ...... Great fun these old Jeeps!, the good people that come with them are the absolute best!, 4 weeks to Flatfender Mecca and I'm growing impatient! Lee |
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LEE
44 GPW-The Perfected Willys 49 2A “If you wait, you only get older” 67 M715 American Made Rolling History |
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Unkamonkey
Member Joined: 23 Mar. 2016 Location: Greeley CO Status: Offline Points: 2093 |
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Reliable is good. I have had my 3B with the V6 for well over 30 years. A few times in the coldest part of the winter I would head out and my work van would not start. Jeep thing starts and runs at the coldest temps. I thought about calling in to say that I can't make it to work. They knew that my Jeep would start and I could jump start the van. Durn thing...
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uncamonkey
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