Hi all, Im hoping some of the Cosworths Gurus are going to stumble upon this thread (or even just some guys that are in the know

I have a 1988 Sapphire and am currrently having a stage 2 conversion done on my baby, I have many questions which no one can answer over here in New Zealand as there are f@#k all Cosworths and even less people who know how to fix/map them.

Here are the parts that I am getting installed ( The only other modifications I currently have are a K&N Panel filter and a Mongoose S/S exhaust)

Cometic Rocker Cover Gasket

Full set of Red Samco Hoses with cold side dump valve location

Bailey Header Tank

Bailey swirl pot

Bailey dump valve DV24

Pace RS500 type 50mm Intercooler

Bailey Crankcase Breather system

Bosch Dark Green 803 Injectors

Garrett -31 Actuator

Weber 3 Bar Map Sensor

Ahmed Bayjoo Chip Level 6

Here are my questions

1: Will I need to change my current spark plugs ( NGK Iridium 3667 BCPR6EIX-11 ) and if so what type should I use?

2: Can I put a recirculating Dump Valve ie. Bailey DV30 on the coldside and run the release hose all the way back across to my airbox?

3: Is there any way I can silence my current DV24 Dump Valve?

4:Is there any danger in swapping between using 98 Octance and 104 Octane fuels in my Cosworth?

5:What is a safe boost to run with all these modifications done (bearing in mind my turbo hasnt been rebuilt, its 17 years old) ?

6: Is there anyway to safely adjust the boost without having a "Boost Gauge" installed?

7: Is there any tuning that is required after installing a new chip or is everything programmed into the chip and you just drive away?

8:

If anyone can answer all or even some of these questions it would be most appreciated.

CheeRS Ollie from New Zealand