Here's my story.
I have a 1994 ED XR8 Sprint.
Factory fitment is
GT40 Cast iron heads
Cobra intake manifold
65mm Throttle mody
Basically it's a motor out of a 93 Mustang Cobra.
The car has had:
Pacemaker 4>2>1's fitted
Twin 2.5" stainless exhaust chopped at the diff.
Mechanical locker diff with 3.45s
11" Custom clutch
K&N Air filter
I recently serviced the car (oil filter, oil, air filter, fuel filter, plugs, eagle 9mm leads, timing advanced 4 degrees) and had it dynoed (on a dynojet dyno) and it pulled 224rwhp.
The thing of interest is that the air fuel ratio was 11.0 through to 11.3 on the dyno run. I want 12.5 - it's currently far too rich.
I have spoken to XR9UTE (Pete from PIE) and have been told that with a tweecer i can remap everything and set my AF ratio/timing etc. This was $8xx + tuning.
I then spoke to West Racing and was told by Tim that the tweecer does not and will not work, that the Ford EMS cannot be worked in any way, and that i would need to fit a Unichip to resolve my AF ratio issue - $1430 supply/fit/tune/driveaway. I was told by Tim that porting and cam work would do very little for my car. I was also told that i had to get new pistons to raise my compression to 10:1 as you cannot mill the heads.
I've been talking to the people on the US on the Corral forum and i'm getting even more conflicting information! Is our EEC-IV *that much* more different to theirs?!
Basically - i plan to build another engine over a 2-3 year period.
I just simply wanted to port my heads + manifold, fit a cam, and get the car remapped to make the most of everything - to last me that 2 year period. But now i have my doubts.
Anyone been down this path?