91 FC...precat?

[grinder]

a FCD - should be no more than about £30 really

have a look on ebay.com - thats the cheapest place usually ( or ausrotary )

[m1tch]

so something as basic as this:

http://cgi.ebay.co.uk/ELECTRONIC-FUEL-CUT-DEFENDER-FOR-ANY-TURBO-CHARGED-CAR_W0QQitemZ150232394859QQihZ005QQcategoryZ72205QQcmdZViewItemQQ_trksidZp1742.m153.l1262

I know it would mean it wouldn\'t cut fuel to the rear rotor, but would this be for modded cars?

[Prof]

Most chipped ECU\'s don\'t require the FCD, which effectively just lies about the boost pressure to the stock ECU. The chipped ECU\'s don\'t cut fuel to the rear rotor, and in fact are likely to have corrected maps for higher boost values.
 
The danger of the FCD is that it tells the ECU that boost is 8psi when it could be much higher, so the appropriate amount of fuel is not being delivered by the injectors (FC\'s tend to run very rich anyway, so there is some headroom).