N/A FJ20 Build

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defdes
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N/A FJ20 Build

Postby defdes » 26 Sep 2007 10:27

I have been talking about it for years, but now that the race season is drawing to a close, and the race car is in good shape, I can start putting some time into this project. Initally, it will be a carbed FJ, 91mm domed pistons from WISECO with about 10.5:1 c.r.. I have a FI intake, and ultimately will cadge an ECU and wiring from an '84 200SX and run EFI.
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fjbuild1.JPG
Weighing in with the 1930's scale from my grandfather
fjbuild2.JPG
Polished beams....
fjbuild3.JPG
Polished crank case...

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defdes
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Postby defdes » 26 Sep 2007 10:28

A couple more of pistons in...
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fjbuild4.JPG
fjbuild5.JPG

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Yellowcar
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Postby Yellowcar » 27 Sep 2007 09:36

Looks nice... How much weight did you need to take off the rods?

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defdes
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Postby defdes » 27 Sep 2007 10:22

After polishing, which I imagine took off a few, there was really only about .5-.75 grams needed to balance.

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defdes
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Postby defdes » 28 Sep 2007 11:53

Continuing with short block assembly
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fjbuild6.JPG
distributor shaft gear
fjbuild7.JPG
fjbuild8.JPG
Checking cam timing, some adjustments were needed to make alll of the dots line up...

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defdes
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Postby defdes » 29 Sep 2007 07:47

"Say hello to my little friend..."
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fjbuild9.JPG

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jason
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Postby jason » 29 Sep 2007 07:58

Nice stuff, that's a look I like!
Jason

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thisismatt
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Postby thisismatt » 29 Sep 2007 09:45

What kind of power are you looking at? What octane gas? :)

The FJ sounds like a nice motor...too bad they're so hard to come by. <chant>Turbo, turbo, turbo...</chant>
I'm your huckleberry.

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defdes
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Postby defdes » 29 Sep 2007 10:01

I have heard claims of 185+ with dual mikunis with large nner venturis. It's a 91 octane motor at least.

indy510
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Postby indy510 » 29 Sep 2007 10:20

Are you going to race that motor? What class can you race it in? Looks good.

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defdes
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Postby defdes » 29 Sep 2007 10:46

No this is for my street car. I race vintage C sedan.
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bwillow3.jpg

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nickledimeme
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Postby nickledimeme » 29 Sep 2007 11:00

I am digging it.....those are some huge juggs.

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defdes
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Postby defdes » 29 Sep 2007 15:29

A couple of details for you who are not familiar:
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fjbuild12.JPG
Upper chain tensioner replaced with a ratchet style from a Mazda. This keeps the chain tension tight at start up a stops the chain rattle these motors are known for due to low oil pressure in the stock tensioner (like L series).
fjbuild11.JPG
Exhaust side of the cross flow...
fjbuild10.JPG
Big intake side, just smoothed with a die grinder, no porting needed!

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Yellowcar
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Postby Yellowcar » 30 Sep 2007 20:24

Cool! I'v never seen the inside of an FJ motor before.
I can see why people like them :D

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icehouse
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Postby icehouse » 30 Sep 2007 21:00

Looking good Defdes!! The FJ is my favorite nissan engine!!
I liked Hainz better...... Can we trade back?


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