cosworth yb

cosworth 4x4 forged low comp pistons
arrow h beam con rods
full lightened and balance bottom end
ported and polished head
swidish inlet
wrc spec 200 block

i know this is a sort of dumpassed question but i want a sort of rough idea

 

With the swidish i expect at least 1,000,000bhp and 4ilbs of torque

 

what turbo ?
what compression ?

 

if it was yours then 40psi held.............

.....but if it was mine i would ask who-ever is mapping it for their advice

 

7.?-1 if memory is right, what ever the low comp pistons are from cosworth.

and it hasn't got a urbo yet. one i find out how much boost the engine would take i can then decide on a turbo

 

nice spec reliable 35 psi

 

psi is dependant on turbo entirely.... decide what power you want, and where you want it in the rev range then spec your turbo to suit. A GT30 sounds like the sort of thing you are after