Hi Larry,
One of my customers has a 1380 and is fully aware of the blow by problems
on this engine. Other than that, he loves it. Great horspower and quick
respone with his side draft weber. David Anton admits that the extra
large bore does create flexure of the bore and really cannot be easily
taken care of.
Mr. Perrys comments on the Datsun clutch pieces and flywheel mods are
correct for all high speed engines. If you have done all the normal
things for a real spinner, then you should always balance the flywheel
and clutch pieces. Also with the Datsun cover, it will fit on the
flywheel in only one position. Not so with the BMC cover that will fit
any of two or three positions, depending on the engine, so should be
indexed after balancing so it will be in the right balance alignment on
installation.
Paul
PAsgeirsson@juno.com
On Sat, 14 Aug 1999 12:52:31 -0700 "Larry & Sandi Miller"
<millerls@ado13.com> writes:
>List,
>
>I received the following note from Bill Perry at Rivergate in response
>to
>the question about using the 210 clutch cover on a 1380.
>
>Bill's opinion is one that I value so thought I would pass it on to
>the list
>for comments. He has me rethinking my desire to switch to the 1380.
>
>Comments from anyone on the list that is currently running a 1380
>would be
>considered helpful.
>
>Larry Miller
>
>----- Original Message -----
>From: William B. Perry <Rivergate@compuserve.com>
>To: Larry Miller <millerls@ado13.com>
>Sent: Saturday, August 14, 1999 6:13 AM
>Subject: 5-Speed Clutch Setup
>
>
>The change to the Datsun 210 clutch works fine-if: You do it in
>connection
>with an engine overhaul so that you can have the crankshaft balanced
>along
>with the flywheel . Otherwise you can end up with a badly
>out-of-balance
>flywheel/clutch. They will need to balance the crankshaft, add the
>flywheel
>and balance the assembly, then add the pressure plate and balance
>again.
>Pretty normal procedure for race engine balance shop.
>You will just need to measure clutch throwout bearing clearance to
>insure
>adequate clearance. Be sure to get 3/16" minimum. This may not
>require
>modifications to the linkage.
>
>1380 engine--I have heard from lots of my customers that have 1380
>engines,
>and I can't seem to recall any of them that are happy with the engine.
>They all seem to have severe blow-by problems, and some have proved
>unreliable. I love the .040" overbore engines as they are just as
>reliable
>as stock. I certainly would not go above 1340. Some customers have
>told
>me they would never again have a 1380. I have never owned one so this
>is
>second-handed info. I suspect the huge bore just takes too much of
>the
>strength out of the block, and may give unstable cylinder bores.
>
>
>
|