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View Full Version : My Smallport/Bigport mix and match motor swap & broken engine vid



jet111
22nd March 2009, 04:25 PM
Alright so my Bigport decided to let go, did a big end bearing in #3..

The sound it made: http://www.youtube.com/watch?v=kXJcwkk06d8

The amount of play in the rod: http://www.youtube.com/watch?v=zQJ5hQc5YQg&feature=response_watch

Rather than replacing the crank and running new bearings I decided to swap the whole thing with a Smallport. The only catch is I only had half a loom, since I didnt have the cash to get it wired up properly I decided to run the Smallport on Bigport management.

I live in a unit so I had to make do with the space I had... which actually turned out to be a good thing because there was no car parked to the right of me, it was like working in a 3 car garage. Had no complaints from neighbors.. Did the swap late on a Saturday.

The old engine getting dismantled:
http://www.ae86drivingclub.com.au/dcimages/9/1/7/9539.jpg

The new motor waiting to go in:
http://www.ae86drivingclub.com.au/dcimages/9/1/7/9540.jpg

Old engine coming out:
http://www.ae86drivingclub.com.au/dcimages/9/1/7/9541.jpg

Poor old girl missing a vital part:
http://www.ae86drivingclub.com.au/dcimages/9/1/7/9542.jpg

The new engine in its place:
http://www.ae86drivingclub.com.au/dcimages/9/1/7/9543.jpg

Ok so here is how the car is running at the moment...

Bigport parts: dizzy, harmonic balancer, water pump, injectors, loom, ECU, alternator, all the RWD water fittings and exhaust manifold.

Smallport parts: intake manifold, spark plugs, fuel rail, leads, throttle body and a couple of electrical connectors.

The car runs really well, much better than the Bigport did and the car is so much more manageable in traffic. I was going to convert the whole thing to Smallport but this is proving to be a good setup. Also thanks to Rthy who gave me advice about this setup.

There was some initial confusion about whether this setup works or not so I thought I would post to say that it does :)

Mark.

sun_moon
22nd March 2009, 04:36 PM
RTHY is damn good. always helps me out with stuffs.

mad props to Leo !

wide s13
22nd March 2009, 04:49 PM
good work.
i ran a smallport on bigport ecu and loom too haha
the only bigport parts i used was bigport rwd manifold, injecters and dizzy left everything else lol

sun_moon
22nd March 2009, 04:52 PM
could u just swap long engines over ?
ie bigport everything with smallport block and head ?
it seems so, right ?

todd
22nd March 2009, 05:08 PM
correct me if im wrong but the reason for using all the bigport parts on it is because the loom plugs might slightly differ between the small+big ports.
but meh, this is always good to hear. lets hope #3 doesnt go on this puppy lol.

sun_moon
22nd March 2009, 05:30 PM
yep different loom

jet111
22nd March 2009, 06:34 PM
could u just swap long engines over ?
ie bigport everything with smallport block and head ?
it seems so, right ?

Not too sure about that. Most things are compatible though

rthy
22nd March 2009, 06:50 PM
oh hai, i think u can buy adjustable con rod bearings from the cusco shop!

jet111
24th March 2009, 01:12 AM
They think of everything these days..

Gim Jeong Il
9th July 2009, 02:39 PM
anybody else done this ?

would like to hear experiences please.