Just got back from the rolling road today my s1 escort made 214 bhp and 240 torque. the mods are as follows

chip (was on car when bought so unknown origin)
standard cam
front mount cooler
exhaust and air filter.
its running 19psi.

my mate has cossie management on an xr2 turbo and has 230bhp...... I want to get on his nerves and prove that i can get more power for cheaper than what he spent "upgrading" to 1986 technology.... any ideas?

pressure feed from inlet to the fuel regulator?
vernier pulley from ebay?
more boost and hear it det and go bang.... maybe not?

on a real tight budget here folks..... ie £200 ish plus rolling road set up costs!