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kaiser supersonic head

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silverbullet72tnt View Drop Down
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    Posted: 26 Oct. 2011 at 11:12am
Both of my flatties, that came from different states, The 47 from texas 20 years ago and the 51 from NH. Both have kaiser supersonics heads on them. Is this a common find?

Interesting to note my 47 has an early timing chain motor as well.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote samcj2a Quote  Post ReplyReply Direct Link To This Post Posted: 26 Oct. 2011 at 12:36pm
Finding a 2A with a Supersonic head is not uncommon, but I would not say it is a frequent occurrence.
Sam

1946 CJ2A   15292 ACM    6678

1947 CJ2A 122031 ACM 111989

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Post Options Post Options   Thanks (0) Thanks(0)   Quote lowenuf Quote  Post ReplyReply Direct Link To This Post Posted: 26 Oct. 2011 at 1:20pm
plz share with Sean your 47 chain motor numbers......you might have one of the Willys recognized chain replacement motors.....
45 #10163 ACM #188
45 #10749 ACM #951
45 #10910 ACM #1294 SOLD
45 Bantam T3-C #799 ACM #155156 SOLD
46 Bantam T3-C #3443
46 Bantam T3-C #8117

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Post Options Post Options   Thanks (0) Thanks(0)   Quote silverbullet72tnt Quote  Post ReplyReply Direct Link To This Post Posted: 26 Oct. 2011 at 1:30pm
I will try fo the numbers later on tonight if I get up to where the motor is. The numbers off the block and the waterpump right? mine is an early 47 if that matters
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Post Options Post Options   Thanks (0) Thanks(0)   Quote munkjeep Quote  Post ReplyReply Direct Link To This Post Posted: 26 Oct. 2011 at 1:49pm
I have owned 20 flatfender jeeps and only one had a Supersonic head on a MB motor, so maybe not too common or not too rare .

Edited by munkjeep - 26 Oct. 2011 at 6:52pm
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Carlsjeep Quote  Post ReplyReply Direct Link To This Post Posted: 26 Oct. 2011 at 2:48pm
What is a Supersonic head? 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote samcj2a Quote  Post ReplyReply Direct Link To This Post Posted: 26 Oct. 2011 at 2:58pm

Kaiser built some cars in the 1950s, I believe, that used a version of the L-134 and had a cylinder head having Kaiser Supersonic cast on the head.  I'm not sure if there was a functional difference.

Sam

1946 CJ2A   15292 ACM    6678

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Post Options Post Options   Thanks (0) Thanks(0)   Quote DiverDownJames Quote  Post ReplyReply Direct Link To This Post Posted: 26 Oct. 2011 at 3:08pm
isn't the combustion chamber shaped differently for more HP, (about 5 I think)?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote samcj2a Quote  Post ReplyReply Direct Link To This Post Posted: 26 Oct. 2011 at 3:12pm
You'd think if Kaiser presumed to put a designation like that on the engine that they'd have done something different, but I'm no expert on those engines.
Sam

1946 CJ2A   15292 ACM    6678

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Post Options Post Options   Thanks (0) Thanks(0)   Quote DiverDownJames Quote  Post ReplyReply Direct Link To This Post Posted: 26 Oct. 2011 at 3:18pm
http://www.earlycj5.com/forums/showthread.php?7101-Kaiser-supersonic-head

7.5:1 Compression

http://en.wikipedia.org/wiki/Willys_Go_Devil_engine

6.45:1 Compression for L-Head 4

So there would be some performance gained with a supersonic head.  It could be a head swap from a jeepster, because I know some of them had supersonics.
45 MB#458536
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Post Options Post Options   Thanks (0) Thanks(0)   Quote ralf Quote  Post ReplyReply Direct Link To This Post Posted: 26 Oct. 2011 at 8:56pm
I just put a Supersonic head that I picked up from a member on my 1945 MB block.  looks good but have not started it.  There is a difference in the combustion chambers.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote silverbullet72tnt Quote  Post ReplyReply Direct Link To This Post Posted: 26 Oct. 2011 at 9:15pm
Both of my motors came with them installed. My dads 51 M38 has a willys head. When we rebuild I am gonna check out the differences.....
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rocnroll Quote  Post ReplyReply Direct Link To This Post Posted: 26 Oct. 2011 at 10:11pm
I'd be willing to bet you won't feel the difference in the seat of your pants.Wink
 
 
 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote silverbullet72tnt Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct. 2011 at 5:59am
I bet I wouldn't either......

I just want to see the physical difference
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sean Quote  Post ReplyReply Direct Link To This Post Posted: 27 Oct. 2011 at 9:07am
Search for "supersonic":  lots of prior discussion & photos
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Post Options Post Options   Thanks (0) Thanks(0)   Quote silverbullet72tnt Quote  Post ReplyReply Direct Link To This Post Posted: 30 Oct. 2011 at 7:33pm
Originally posted by lowenuf lowenuf wrote:

plz share with Sean your 47 chain motor numbers......you might have one of the Willys recognized chain replacement motors.....

No numbers on the waterpump boss. Would the numbers on the bottom starter side of the block help identify this?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote sean Quote  Post ReplyReply Direct Link To This Post Posted: 31 Oct. 2011 at 8:15am
Originally posted by silverbullet72tnt silverbullet72tnt wrote:

... No numbers on the waterpump boss. Would the numbers on the bottom starter side of the block help identify this? ...
Yes, but ya need more than just that.  Check for everything listed here:

http://www.thecj2apage.com/forums/another-engine-block-survey_topic18318.html
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Post Options Post Options   Thanks (0) Thanks(0)   Quote silverbullet72tnt Quote  Post ReplyReply Direct Link To This Post Posted: 31 Oct. 2011 at 11:17am
ok, I went and got all the numbers I could. I didn't want to put them into your data base, as I belive the block is not even close to correct.....

Block number on side by starter 636953 w2 NI CR N2

Date is the non clock style 11-22

Has the small w/p boss with no numbers, they are on the side pad: 440-37-595

Oil pan flange numbers are 11 30 39

Not sure but I think the block is too old to be a replacement motor from the factory, I am guessing somebody got it out of an older willys car or something at some point in the jeeps life.

If only the little guys could talk....
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