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320->323 motor conversion
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Subject: 320->323 motor conversion
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From: [email protected]
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Date: Wed, 7 Dec 94 23:16:46 EST
> The engine is for
> sale in the December Roundel as follows: 1982 323i engine, fresh head (less
> than 3000mi) upgraded cam, new "freeze plugs" (what are these?), and timing
> belt. includes fuel injection fuel distributor, starter, wiring harness and
> brain. All that for $950...I ask whether or not it is going to be a nightmare
> to try and drop this into my 320i. I am assuming that the engine is an
> inline-6, right?
> -------Brann-Man--------
Freeze plugs are those stamped, round plugs in your block about 1.5"
around. They're leftover holes from the casting process, machined out and
fit with a plug. The name comes from the idea that when your block gets
really cold, these plugs pop out instead of cracking the block.
Yep, that's a six-cylinder motor. The pricing isn't bad either for
a fresh head. What is the "upgraded cam"? A stock cam is pretty damned nice
in the 323i.
You must change the following things:
-tranny: the input shaft is slightly different...
-driveshaft: if you get the tranny, try to get one, or you might
have to shorten and balance...
-exhaust: the 320i pipe is PUNY anyway, and the 323 has duals.
New mufflers are about $90 each, $125 for a Ansa stock-type resonator through
Noble or other Ansa or Bosal suppliers. You could have a muffler shop make
up a high-flow muffler for you, maybe a 2.5" Dynomax
and put that at the left rear.
-radiator is different: about $250 from Hanerhaus when we got one.
-make sure the complete injection is there, including the lines for
the injection, exhaust manifolds, and down pipes, if you can get them.
This one is L-Jet, unlike my dad's '78 which has K-Jet, so it likely
gets better gas mileage...
My father's old (now MY) 323i has a 325e longblock with stock K-Jet
and ignition, the OD 5-speed to replace the original 4-speed, and a short
3.90:1 rear from ... a '81 320i. So you might consider a 3.64 rear from
an earlier 320i so you're slightly taller. The 'e motor is shorter on revs
anyway but it really wants a 3.45:1 rear (like the stock 323 had). Well,
I'm rambling now, so e-mail me directly for other details, Brann-Man.
thi v.