Cadillac specs


1993 - 1998 Cadillac (LD8 (VIN Y )
• Valve Timing (With Ramp at 0.100 mm Lift)
• Intake Opens 9 degrees BTDC
• Intake Closes 55 degrees ABDC
• Exhaust Opens 51 degrees BBDC
• Exhaust Closes 13 degrees ATDC

• Valve Lift
• Intake 8.6 mm 0.339 in
• Exhaust 8.6 mm 0.339 in

• Duration (@ 0.100 mm Lift)
• Intake 244 degrees
• Exhaust 244 degrees

• Valve Overlap (@ 0.100 mm Lift) 22 degrees

.

1993 - 1999 Cadillac (L37 (VIN 9)
• Valve Timing (With Ramp at 0.100 mm Lift)
• Intake Opens 13 degrees BTDC
• Intake Closes 73 degrees ABDC
• Exhaust Opens 51 degrees BBDC
• Exhaust Closes 13 degrees ATDC

• Valve Lift
• Intake 9.4 mm 0.370 in
• Exhaust 8.6 mm 0.339 in

• Duration (@ 0.100 mm Lift)
• Intake 266 degrees
• Exhaust 244 degrees

• Valve Overlap (@ 0.100 mm Lift) 26 degrees

.

1999 Cadillac (LD8 (VIN Y )
• Valve Timing (With Ramp at 0.100 mm Lift)
• Intake Opens 8 degrees BTDC
• Intake Closes 55 degrees ABDC
• Exhaust Opens 51 degrees BBDC
• Exhaust Closes 13 degrees ATDC

• Valve Lift
• Intake 8.6 mm 0.339 in
• Exhaust 8.6 mm 0.339 in

• Duration (@ 0.100 mm Lift)
• Intake 243 degrees
• Exhaust 244 degrees

• Valve Overlap (@ 0.100 mm Lift) 22 degrees

.

2000 - 2003 Cadillac (LD8 (VIN Y) 1.68 rockers
• Timing, @ 0.150 mm [0.006 in] Lift
• Intake Opens 5.6 degrees BTDC
• Intake Centerline 113 degrees ABDC
• Intake Closes 236.8 degrees ABDC
• Exhaust Opens 222.5 degrees BTDC
• Exhaust Centerline 107 degrees BTDC
• Exhaust Closes 13.8 degrees ABDC

• Camshaft Lift
• Intake 6.15 mm 0.2421 in
• Exhaust 5.94 mm 0.2339 in
• Valve Intake 10.500 mm 0.4134 in
• Exhaust 10.000 mm 0.3937 in

• Duration, @ 0.150 mm [0.006 in] Lift
• Intake 242 degrees
• Exhaust 236 degrees

• Valve Overlap, @ 0.150 mm [0.006 in] Lift 1.98 degrees

.

2000 - 2003 Cadillac (L37 (VIN 9) 1.68 Rockers
• Timing, @ 0.150 mm [0.006 in] Lift
• Intake Opens 0 degrees
• Intake Centerline 122 degrees ATDC
• Intake Closes 251 degrees ATDC
• Exhaust Opens 225.5 degrees BTDC
• Exhaust Centerline 106 degrees BTDC
• Exhaust Closes 20.5 degrees ATDC

• Camshaft Lift
• Intake 6.15 mm 0.2421 in
• Exhaust 5.94 mm 0.2339 in
• Valve Lift, Intake 10.500 mm 0.4134 in
• Exhaust 10.000 mm 0.3937 in

• Duration, @ 0.150 mm [0.006 in] Lift
• Intake 251 degrees
• Exhaust 246 degrees

• Overlap, @ 0.150 mm [0.006 in] Lift 2.04 degrees
.

2004 - 2008 Cadillac (LD8) 1.68 Rockers
• Camshaft Lobe Duration @ 0.150 mm (0.006 in) Lift - Exhaust 236 degrees
• Camshaft Lobe Duration @ 0.150 mm (0.006 in) Lift - Intake 242 degrees
• Camshaft Lobe Lift - Exhaust 5.94 mm 0.2339 in
• Camshaft Lobe Lift - Intake 6.15 mm 0.2421 in

• Camshaft Lobe Overlap @ 0.150 mm (0.006 in) Lift 1.98 degrees

• Camshaft Timing @ 0.150 mm (0.006 in) Lift
• Intake Opens 1.3 degrees BTDC
• Intake Centerline 117.0 degrees ATDC
• Intake Closes 237.9 degrees ATDC
• Exhaust Opens 226.1 degrees BTDC
• Exhaust Centerline 111.0 degrees BTDC
• Exhaust Closes 5.1 degrees ATDC

.

2004 - 2008 Cadillac (L37) 1.68 Rockers
• Camshaft Lobe Duration @ 0.150 mm (0.006 in) Lift - Exhaust 246 degrees
• Camshaft Lobe Duration @ 0.150 mm (0.006 in) Lift - Intake 251 degrees
• Camshaft Lobe Lift - Exhaust 5.94 mm 0.2339 in
• Camshaft Lobe Lift - Intake 6.15 mm 0.2421 in

• Camshaft Lobe Overlap @ 0.150 mm (0.006 in) Lift 2.04 degrees

• Camshaft Timing @ 0.150 mm (0.006 in) Lift
• Intake Opens 0.3 degrees ATDC
• Intake Centerline 122.0 degrees ATDC
• Intake Closes 246.0 degrees ATDC
• Exhaust Opens 229.3 degrees BTDC
• Exhaust Centerline 110.0 degrees BTDC
• Exhaust Closes 11.2 degrees ATDC

[This message has been edited by AJxtcman (edited 11-11-2007).]

1995 - 1999 Olds L47 4.0L VIN C
• Valve Timing (With Ramp at 0.100 mm Lift)
• Intake Opens 9 degrees BTDC
• Intake Closes 55 degrees ABDC
• Exhaust Opens 51 degrees BBDC
• Exhaust Closes 13 degrees ATDC

• Valve Lift, Intake 8.6 mm 0.339 in
• Exhaust 8.6 mm 0.339 in


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2000 - 2003 Olds L47 4.0L VIN C 1.68 rockers
• Timing, @ 0.150 mm [0.006 in] Lift
• Intake Opens 5.6 degrees BTDC
• Intake Centerline 113 degrees ABDC
• Intake Closes 236.8 degrees ABDC
• Exhaust Opens 222.5 degrees BTDC
• Exhaust Centerline 107 degrees BTDC
• Exhaust Closes 13.8 degrees ABDC

• Camshaft Lift
• Intake 6.15 mm 0.2421 in
• Exhaust 5.94 mm 0.2339 in
• Valve Intake 10.500 mm 0.4134 in
• Exhaust 10.000 mm 0.3937 in

• Duration, @ 0.150 mm [0.006 in] Lift
• Intake 242 degrees
• Exhaust 236 degrees

• Valve Overlap, @ 0.150 mm [0.006 in] Lift 1.98 degrees
• Duration (@ 0.100 mm Lift)
• Intake 244 degrees
• Exhaust 244 degrees

• Valve Overlap (@ 0.100 mm Lift) 22 degrees

[This message has been edited by AJxtcman (edited 11-11-2007).]

Revised Spec Information

1993 - 1998 Cadillac (LD8 (VIN Y )
• Valve Timing (With Ramp at 0.100 mm Lift)
• Intake Opens 9° BTDC
• Intake Closes 55° ABDC
• Intake Lobe Centerline 113° ATDC

• Exhaust Opens 51° BBDC
• Exhaust Closes 13° ATDC
• Exhaust Lobe Centerline 109° BTDC

• Valve Lift
• Intake 8.6 mm 0.339 in
• Exhaust 8.6 mm 0.339 in

• Duration (@ 0.100 mm Lift)
• Intake 244°
• Exhaust 244°

• Valve Overlap (@ 0.100 mm Lift) 22°

.

1993 - 1999 Cadillac (L37 (VIN 9)
• Valve Timing (With Ramp at 0.100 mm Lift)
• Intake Opens 13° BTDC
• Intake Closes 73° ABDC
• Intake Lobe Centerline 120° ADTC

• Exhaust Opens 51° BBDC
• Exhaust Closes 13° ATDC
• Exhaust Lobe Centerline 109° BTDC

• Valve Lift
• Intake 9.4 mm 0.370 in
• Exhaust 8.6 mm 0.339 in

• Duration (@ 0.100 mm Lift)
• Intake 266°
• Exhaust 244°

• Valve Overlap (@ 0.100 mm Lift) 26°

.

1999 Cadillac (LD8 (VIN Y )
• Valve Timing (With Ramp at 0.100 mm Lift)
• Intake Opens 8° BTDC
• Intake Closes 55° ABDC
• Intake Lobe Centerline 113.5° ATDC

• Exhaust Opens 51° BBDC
• Exhaust Closes 13° ATDC
• Exhaust Lobe Centerline 109° BTDC

• Valve Lift• Intake 8.6 mm 0.339 in
• Exhaust 8.6 mm 0.339 in

• Duration (@ 0.100 mm Lift)
• Intake 243°
• Exhaust 244°

• Valve Overlap (@ 0.100 mm Lift) 21.5°

[This message has been edited by AJxtcman (edited 03-07-2008).]

Depends, which engine?

What do the intake and exhaust ports flow?

Is it supercharged? Turbocharged? Naturally aspirated?

What does the piston dome look like as well as the combustion chamber, and how much compression are you running?

All of these questions affect how much total duration, total lift, and cam overlap the engine is going to want to like to make HP.

John Stricker

quote Originally posted by AJxtcman: Question for any one that feels up to it! When building a performance engine do you have more lift and duration on the intake side or the exhaust? Take a look at the specs listed

quote Originally posted by jstricker: Depends, which engine? What do the intake and exhaust ports flow? Is it supercharged? Turbocharged? Naturally aspirated? What does the piston dome look like as well as the combustion chamber, and how much compression are you running? All of these questions affect how much total duration, total lift, and cam overlap the engine is going to want to like to make HP. John Stricker

STOCK

The deal is the exhaust cams are smaller than the intakes. Hmmmmmmmmmmmmmmmmm

So?

Not uncommon.

The intakes generally also have bigger valves.

Reason being, the exhaust gases are PUMPED out of the cylinder, the intake air charge has to be pushed in at atmospheric pressure (unless somehow boosted) so the intake side has to flow more than the exhaust because it's working under lower pressures.

John Stricker

quote Originally posted by AJxtcman: STOCK The deal is the exhaust cams are smaller than the intakes. Hmmmmmmmmmmmmmmmmm