Hi there,
This is my first cosworth powered car and i'm having a few minor issues.
My car is an XR4x4 with a Escort cosworth 4x4 transplanted into it,
I rebuilt it earlier this year after it spun a big end shell whilst on a dyno being tuned.
Anyway my question is as follows:-
When i am on boost it occasionally misfires like it coughs but it isn't constant and it doesn't do it all the time either What would be the remedy? Will runing a bigger sparkplug gap help if so what size should it be?
I'm runnig after market fully mappable ecu, Coil pack, 440cc flow injectors, mongoose exhaust, rs500 70mm core intercooler, T34 hibrid, pipecross cone filter, Bailey oil breather, ARP stud & nut kit, WRC multi layered head gasket, I'm running 19psi with 22psi peak with 320bhp @ 6700rpm & 300lbs torque @4200rpm.
Once i can get this sorted i want to get more power from the engine, What is the most it can be pushed with being reliable. on my current mods?

Many thanks,

Simon