The L20 bottom ends are pretty robust units.The cranks are strong,so are the rods and the blocks are strong except sometimes they can crack around the hole for the head bolts.Balancing always helps smooth out the vibrations and helps them rev.The rods can benefit from a polish and shot peen and new bolts.ACL pistons seem to cope well with boost as long as it doesnt detonate.I know a few guys running over 500hp from holden sixes using acl pistons.I think the largest dish they do for the L20 is 10cc.If the block you use hasnt been decked then the pistons should be about 1mm from the top.If you use an open chamber big port L20 head and clean up the combustion chambers a bit then you might get the compression low enough to use a standard head gasket.
Ryan Ottens wrote: > hey list. > very shortly i will be adding a turbo to my efi l20b. > its one off a rb20det, ball bearing, i plan on running about 14 psi, > intercooler roughly size of a vr4 one(bit bigger), and yeh im just wondering > what i can do to strengthen the motor. the head will be fine. im just not > sure about bottom end and guts of it. > for starters i need a new block. so if i get one recoed what should i get > done to it for turbo use? balanced and blue printed. > i think the hea dis shaved a bit too, so would deep dished pistons be a good > idea to get the c/r a bit lower? if so what ones would be good to use? > > any other information would be great. > thanks again. > > ryan > > _________________________________________________________________ > STOP MORE SPAM with the new MSN 8 and get 2 months FREE* > http://join.msn.com/?page=features/junkmail > --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]/ ---------------------------------------------------------------------
