The standard ca18et rods are not made to handle anything over 12psi on the t20 or lack of tuning.
The best solution as mentioned in the past is to use ca18det rods and arp rod bolts.
Arp head studs and good tuning will solve all the other issues as the pro-swirl 8v head is superior
for economy and torque over the 16v all the way to 5000rpm which is where most of the time is
spent on the street or driving in general.
If you want more? then bigger exhaust valve with 5 angle finish for in/ex valves, careful porting of short turn radius,
clean up the casting imperfections & good port matching is all thats required. The twin spark head has recorded 46mpg
in NA setups due to its pro swirl highlow end torque design so with boost you have a win/win situation.
Going over 200 atw t28bb, better ex. manifold, bigger injectors and extrude honed ca20e manifold along with better tuning,
top quality spark plugs and ignition fix so they fire all the way to redline which should be done anyway.
Megasquirt efi with distributorless ignition allows the ultimate budget tuning. Supports a community rather than bigwigs.http://www.boostengineering.net/category_s/21.htm
If only the Admin would allow new members to the UK site we can get more info for those who have
done it. Its quite slack as I and others have been waiting over 2 years!!! and Ive sent heaps of emails