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heathr
 Post subject: L20 build
PostPosted: Sat Jul 21, 2012 7:10 pm 
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Posts: 124
ok I have a 200b L20 block an A87 head twin 40 webers and soon to get a mild cam just after some tips on what to and not to do before I wack it all together cheers guys :)
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MYDATO
 Post subject: Re: L20 build
PostPosted: Sat Jul 21, 2012 7:25 pm 
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Joined: Fri Dec 17, 2004 2:51 pm
Posts: 4149
Location: Frankston Vic
First thing not to do is wack it all together. Second have a workshop manual handy follow it and take your time. Third do a search on setting up rocker ratios (it has been covered 4 or five time here). Forth keep everything as clean as possible. Fifth if you are unsure about something stop and ask. Building an engine takes time and alot of concentration (to build it right anyway).

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Datsun 1600 CA18DET 185kw @ 16 PSI Engineered
http://ozdat.com/forum/viewtopic.php?f=59&t=6322&start=135
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skitzone
 Post subject: Re: L20 build
PostPosted: Sat Jul 21, 2012 8:41 pm 
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Joined: Sat Jun 11, 2011 11:08 pm
Posts: 300
heathr wrote:
ok I have a 200b L20 block an A87 head twin 40 webers and soon to get a mild cam just after some tips on what to and not to do before I wack it all together cheers guys :)


I'd gasket port match the intake/head and extractors/head and wrap your extractors so you don't boil fuel in you bowls .
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richardc
 Post subject: Re: L20 build
PostPosted: Sat Jul 21, 2012 11:44 pm 
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Joined: Fri Jul 16, 2004 11:46 pm
Posts: 440
Location: 3910 Another Peninsula Boy
Boost the compression ratio. An early L20 CR is 7.8:1 - too low for a real performance boost. The last L20's may be a little higher in CR. I suggest you measure it up and determine the CR before rebuilding it and being disappointed with the power improvement.

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MYDATO
 Post subject: Re: L20 build
PostPosted: Sun Jul 22, 2012 6:48 pm 
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Location: Frankston Vic
No a A87 head will bump the comp ratio up. You should however measure up otherwise you may find your comp ratio is too high.

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Datsun 1600 CA18DET 185kw @ 16 PSI Engineered
http://ozdat.com/forum/viewtopic.php?f=59&t=6322&start=135
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