[taff2]

I've posted this here as well , in case some of you don't frequent the boost section.
I've been advised that I MAY need to run a bigger ring gap than I intended on my turbo combo so I'd like some info or advice from pro engine builders,or what others with similar turbo/blown combos are using.
My combo is a 4.090" bore,3/4 filled,reverse cooled iron block,forged pistons with .006" clearance, C16 type fuel,boost will be 25psi,projected HP around 1200.
I've always followed the ring manufacturers advice on this,in this case for a blown,gas engine, .0055" x bore size of 4.090" = .0224", I then added an extra .002" because the block is filled, I rounded this off to .025". The manufacturers recommendations for a big hit nitrous engine is .008" x bore,which would make it .03272" ring gap,plus the extra .002" for a filled block gives me .035" rounded off,and this is what I've been advised to use. Any advise appreciated,Taff.