That's the trouble with turbo motors. Run a comp test and post it up when you can. If you have cam specs ,post those as well if you wish.
found these stock cam specs for comparison. it's interesting none the less, and you understand this far better than i do.
1987 Turbo Coupe cam spec.s: slider
Cam Lift (Intake):.238"
Cam Lift (Exhaust):.238"
Valve Lift (Intake):.412"
Valve Lift (Exhaust):.412"
Degrees Overlap:28 Deg
Advertised Duration (Intake):248 Deg
Advertised Duration (Exhaust):250 Deg
Duration at .050" Lobe Lift (Intake):187 Deg
Duration at .050" Lobe Lift (Exhaust):189 Deg
Cam Timing at .050" Lobe Lift (Intake Open):23 Deg After Top Center
Cam Timing at .050" Lobe Lift (Exhaust Open):39 Deg Before Bottom Center
Cam Timing at .050" Lobe Lift (Intake Close):30 Deg After Bottom Center
Cam Timing at .050" Lobe Lift (Exhaust Close):30 Deg Before Top Center
Valve Lash (Intake):Hydraulic
Valve Lash (Exhaust):Hydraulic
Lobe Centerline (Intake):108 Deg
Lobe Centerline (Exhaust):116 Deg
1989-1994 2.3L Roller Cam Engines
Lobe Lift
Intake 0.2381"
Exhaust 0.2381"
Rocker arm (cam follower) ratio 1.64:1
Theoretical Valve Lift @ Zero Lash
Intake 0.390"
Exhaust 0.390"
Valve stem 0.3419" dia
Valve stem 0.2750" dia
Stock Roller Camshaft Pattern
Lobe Center Separation: 112 deg
Intake @ 0.050:
- Open: 14.5 deg BTDC
- Centerline: 108 deg
- Closed: 21.5 ABDC
- Duration: 187 deg
Intake @ 0.00 lift:
- Duration: 248 deg
- Lift: 0.390"
Exhaust @ 0.050:
- Open: 30.5 deg BBDC
- Centerline: 116 deg
- Closed: 21.5 ATDC
- Duration: 189 deg
Exhaust @ 0.00 lift:
- Duration: 250 deg
- Lift: 0.390"
I plugged the .050" info from the roller Cam specs above into this Camshaft Calculator
http://www.wallaceracing.com/camcalc.php and this the output:
The Ranger Roller Cam has an Overlap of 36.00 degrees and has in Intake Duration of 216.00 degrees. The Exhaust Duration is 232.00 degrees. The Inlet Cam has an Installed Centerline of 93.50 degrees ATDC. The exhaust cam has an Installed Centerline of 94.50 degrees BTDC.