|
Now that`s what i call a "Grunter"!!!!
Kris.
----- Original Message -----
Sent: Wednesday, March 19, 2003 9:14
AM
Subject: Re: L20 crank into L18? Good,
bad or ugly?
Nat,
Its been very entertaining reading some of the
advice from the lads, however i think it may be rubbish. true the L20 B
crank has 5mm bigger main journals as does the Z20 , and this is a good thing
because then you wont break the crank after about 5 rallies. to do it properly
you would need to get the L18 line bored ($150-300) and use the normal
L20 main bearings, get the crank nitrided and it will take 100 rallies+
If
you are on a budget you can use late 1600 or L24 conrods Z20 or Z22
standard pistons and with a few "adjustments" to the block you can have up to
2092cc in an L18 block 100 %reliable with standard bits as if nissan
made it themselves !
I wouldnt worry to much about calculating stroke
rod ratios, bore flex , good or bad crank to piston angles????
I can tell
you this because its been done like that for 20 years in australian rallying
with the usual datsun reliability, it turns out to be stronger and more
reliable than with an L18 crank because you dont have to rev the date out of
it. this is a very good thing in the bush, being able to get it up on cam
straight out of every corner and up every hill , torque is what you want and
bigger crank is gold !
if anyone wishes to stress about rod angularity or
scuffed pistons then try a Z 22 crank ( 92 mm stroke instead of the L18s 78
mm) with 1600 rods, very short custom pistons, an 89mm bore, all
resulting in a 2.3 L L18 that is happy to rev all day to 7500. this
engine may be on the edge but i have built 2 like it , and datrally in
melbourne once did one with a 94 mm sroke and 90mm bore giving 2.4L. and geuss
what, they all lived happily ever after!
My 2 engines like this have each
done 2 years of rallying (causing many tears for wrx and evo competitors)
without anything but regular oil changes.
so it sounds like an exelent and
safe bet to put in the L20 crank so let me know if you are after more
info ! and please tell me about the rest of the
car.
mark [EMAIL PROTECTED]
--membersozdat-------------------------------------------------------
OZDAT Mailing List Please Note:-
Send (un)subscribe requests to
[EMAIL PROTECTED]
Send submissions to
[EMAIL PROTECTED]
No unauthorised redistribution of this
email
http://www.ozdat.com/ozdatonline/index.htm
http://www.ozdat.com/ozdatonline/listindex.html
http://www.mail-archive.com/[EMAIL PROTECTED]/
---------------------------------------------------------------------
--membersozdat-------------------------------------------------------
OZDAT Mailing List Please Note:-
Send (un)subscribe requests to [EMAIL PROTECTED]
Send submissions to [EMAIL PROTECTED]
No unauthorised redistribution of this email
http://www.ozdat.com/ozdatonline/index.htm
http://www.ozdat.com/ozdatonline/listindex.html
http://www.mail-archive.com/[EMAIL PROTECTED]/
--------------------------------------------------------------------- |
