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Kiwi1966
Samba Member
Joined: August 18, 2009
Posts: 168
Location: Ohoka New Zealand
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 Posted: Sat Apr 24, 2010 1:18 am Post subject: Early 54 pistons |
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Hi
I am currently tearing down a early 54 36hp engine that I have purchased for my 54 beetle. This motor I have had running, but not knowing the history of it, I wanted to go right through it and replace/rebuild as required.
It has dished top pistons (Nural with manf date 4/54 on top). unfortunally one has a crack in the wall.
I will be fitting a new set of barrels/pistons, but my question is, after reading my Bentley I realised that I will increasing the compression ratio from 6.1 to 6.6 using flat top pistons. Could anybody give me advise as to use the existing distriubter (VJU4/BR3T) or should I use the later 54/55 type. It also has the original earlier style heads.
Also any ideas on what would have caused this crack.I can see evidence where something has definetly hit the inside of the piston behind the crack,but no evidence to what caused it .The motor has been apart at least once because I dont think that is a original oil ring
Thanks Ross |
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Volumex
Samba Member
Joined: October 11, 2007
Posts: 532
Location: Sarnia, ON
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| Posted: Sat Apr 24, 2010 2:43 am Post subject: |
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VW nominated that you can keep the BR3 if you change the timing. (Bottom left of this: http://www.thesamba.com/vw/archives/manuals/techbulletins/m1/9_55_page3.jpg )
If you want to use a later distributor, may I join the front of the queue of the hundreds of people who want to buy your BR3. (j/k - use the BR3)
With modern higher octane fuels, you might want to try keeping the original timing & see if you get pinging. Then again, NZ fuel is probably even dodgier than Australian so be careful 
As for the crack, I have no idea. |
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Kiwi1966
Samba Member
Joined: August 18, 2009
Posts: 168
Location: Ohoka New Zealand
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| Posted: Sun Apr 25, 2010 3:51 am Post subject: |
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Thanks for the advise. What makes VJU4 BR3T dist so desirable? are they
getting harder to get. Fuel over here is not the best and is getting bloody expensive as well 
Thanks Ross |
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valentinesr
Samba Member
Joined: June 30, 2008
Posts: 749
Location: Ontario, California
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| Posted: Sun Apr 25, 2010 7:05 am Post subject: |
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I just wanted to jump into this thread and say..... "Them are some bad ass pistons!!!!" Thats some cool shit brotha.. Love to see that old OG stuff.. awesome.. Too bad there wasn't a way to cost effectively save them.. I saved them pics into my VeeDub folders.. Just wanted to give some props.. Thanks for the pics.. 
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Valentine, Ray J Sr.
Ontario, California
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Glenn 
Mr. 010
Joined: December 25, 2001
Posts: 76939
Location: Sneaking up behind you
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| Posted: Sun Apr 25, 2010 7:21 am Post subject: |
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| Kiwi1966 wrote: |
Thanks for the advise. What makes VJU4 BR3T dist so desirable? are they getting harder to get.
Thanks Ross |
They have a very short production run so they are rather rare... but they also have a very limited market.
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"
Member #1009
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