Re: L18W enquiries

[Brad HALLETT]

Heath   There is no way I would trust a 92.5mm bore in an L18W over 5000 revs.  The amount of flex in  the walls would be ridiculous.   As for the 90mm stroke, I have built one of these using an offset ground Z22 crankshaft and L13 rods with VG30 pistons.  OK for speedway where you go one way and hang on, but with the intermittent acceleration and deceleration of rallying POP GOES THE WEASEL.  The stroke to bore ratio is just too intense.   The only way to do it properly with an L18 is to plate the head and use 2 x carbo fibre head gaskets from ACL gaskets at Eagle Farm,  Big money and work for a littl gain.   Regards Brad HALLETT Ipswich, Qld ----- Original Message ----- From: Heath To: [EMAIL PROTECTED] Sent: Tuesday, May 16, 2000 1:21 PM Subject: Re: L18W enquiries my friend has had a L18 W to 92.5 bore   another guy in Ipswich has his speedway datto out to 90.5 bore with a works crank of 90mm stroke   Heath     ----- Original Message ----- From: Brad HALLETT To: [EMAIL PROTECTED] Sent: Friday, 12 May 2000 3:44 Subject: Re: L18W enquiries Thrill Seekers   I have stripped the L18W down to short motor and head and here is what I have: Head: A87 peanut chamber 38mm port, 44mm intake 36mm exhaust.  Cast marked #65 and 1029. Block: 85mm bore Crank: haven't removed it yet to check if steel or cast (appears steel) but it has A8740 and 33-0 stamped on it.   The engine sat in a four door 180B at the local wreckers for over 5 years with a dirty old Nikki 2 barrel on it.  The head has corrosion around the water jackets but is quite repairable.  Obviously the whole thing will be fully rebuilt.   As I stated I plan to bore it to 88mm and use L16rods/Z22S pistons - Should I bore it to 87mm to allow for a later rebuild just in case?    Brad HALLETT Ipswich, Qld ----- Original Message ----- From: Terry & Heather To: [EMAIL PROTECTED] Sent: Thursday, May 11, 2000 8:58 PM Subject: Re: L18W enquiries Brad, They go very safely to 3.5" (88.8mm) so you could easily build yourself a copy of the once popular Nismo 1889 cc screamer with a V912/A87 38 mm ports and go have lots a fun. It would be nice also if you got the steel crank, the early HC 9.5:1 SSS W engines had them. The 1889 cc engine has a CR ~10.5:1 with the stock head thickness of 4.25" so you have to fiddle with the cam a bit to keep detonation in check (the 72 degree is good with webers). enjoy, Terry Brad HALLETT wrote: Thrillseekers, Due to a bizarre twist of fate, a local auto wrecker has given me a free complete L18W engine from a 610.  I have only seen it at night in the car so I have no idea what head is on it but it is a definite W block. I have never had a W block before, as I have always been content destroying nomal L18's. I therefore need to know what cylinder wall thicknessesI am looking at, i.e. what can I 'safely' bore it to, and what head will probably be on it.  It will be standard as it is on a four door, ll the plates match the stamps, and carb/exhaust are all standard. How hard are the bores?  Do they withstand outrageous stroke:rod ratios?  Is it better to fit an L20crank or just prep the L18 crank and make it rev? I could wait until I pick it up and disassemble it, but where would the fun be in that? ThanksBrad --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.datascribe.com.au/ozdatonline/index.htm http://www.datascribe.com.au/ozdatonline/listindex.html http://www.mail-archive.com/membersozdat@datascribe.com.au/ --------------------------------------------------------------------- --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.datascribe.com.au/ozdatonline/index.htm http://www.datascribe.com.au/ozdatonline/listindex.html http://www.mail-archive.com/membersozdat@datascribe.com.au/ --------------------------------------------------------------------- --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.datascribe.com.au/ozdatonline/index.htm http://www.datascribe.com.au/ozdatonline/listindex.html http://www.mail-archive.com/membersozdat@datascribe.com.au/ --------------------------------------------------------------------- --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.datascribe.com.au/ozdatonline/index.htm http://www.datascribe.com.au/ozdatonline/listindex.html http://www.mail-archive.com/membersozdat@datascribe.com.au/ --------------------------------------------------------------------- --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.datascribe.com.au/ozdatonline/index.htm http://www.datascribe.com.au/ozdatonline/listindex.html http://www.mail-archive.com/membersozdat@datascribe.com.au/ ---------------------------------------------------------------------