250bhp and the flapper cant cope

[sax player]

Finaly have the engine in the stag ( 4ltr griff breathing through twin plenum). The dyno went up to 248bhp 280lbs torque at 4700 and the engine dies.
The flapper is at full scale deflection so am presuming the system gets to this point and then gives up.
Looking at the graph i am presuming the engine through the right system will develope about 260 to 270.
So now i need to fit the hot wire system ( griff pre cat) that came with the engine this is where i need to pick some brains.
1. the harness came with no lambda sensors is there a mod to run an engine without these in by fitting a resistor
2. the ecu is a 14cux with mounting plate for the map chip. the chip has no identification to it other then a red flash of paint in one corner is this a standard tvr chip
3. i aim to keep the tp system. what is the best afm to use. at present it is 3am
4. the cables to join the loom i have
orange/green 4mm cable
white/purple 2mm cable
brown/orange 1mm cable
purple/yellow 1mmcable
yellow 1mm cable
orange/black 1mm cable
black.yellow 1mm cable
And a black and white that i presume is the coil conection

Any advice will be most appreciated.
shaun.

[AntonyJ]

Shaun, call me, I have all the info you need.