Sounds like a dirty engine — carbonized fuel injectors,
intake valve stems, stuck piston rings, etc..
Not exact matches
I changed the head gaskets the
intake manifolds and the
valve stem seals.
The diameter of
intake valves is 37 mm, the exhaust — 32.2 mm, and the
stem is 6 mm in diameter.
continue reading • Aluminum performance cylinder head • 315cc rectangular
intake ports • Replacement head for P / N 14011076 • Machined for 2.250» / 1.880» 11/32»
valve stems • 110cc exhaust ports • 118cc combustion chambers
It is similar to the R18A head, but the size of
intake valves was increased to 33 mm, of exhaust
valves — to 26 mm, and the diameter of
valve stem was 5.5 mm.
These heads are assembled with the following components: 12363757
Intake Valves 10212808
Valve Spring Retainers 12363758 Exhaust
Valves 10212810
Valve Stem Seals 12551483
Valve Springs 24503856
Valve Locks 12552126 3/8» Rocker Studs click
Requires hollow -
stem intake valves P / N 12565311, hollow -
stem exhaust
valves P / N 12565312,
valve springs P / N 12586484, and aftermarket notched pistons OR machined stock pistons
lift • 276cc
intake runners and 92cc exhaust ports • Fits all LS engines with 4.000» bore or larger • 2.165» hollow
stem intake, and 1.590» solid
stem exhaust
valves •.550» max
valve lift • D - shaped exhaust ports
Stock Specs:
Intake port volume: 295 cc (peak stock flow 309 cfm) Exhaust port volume: 106 cc (peak stock flow 194 cfm) Stock Combustion Chamber Size: 60 cc Stock intake valve size: 2.125» 96.2 grams (hollow stem) Stock exhaust valve size: 1.590» 73.5 grams Here are some teaser specs of the new Stage 2 CNC porting option: Intake port volume: 310 + cc Exhaust port volume: 105 + cc CNC flow rate of intake port is 55 + cfm over stock flow with very strong mid-lift improvements using stock 2.125»
Intake port volume: 295 cc (peak stock flow 309 cfm) Exhaust port volume: 106 cc (peak stock flow 194 cfm) Stock Combustion Chamber Size: 60 cc Stock
intake valve size: 2.125» 96.2 grams (hollow stem) Stock exhaust valve size: 1.590» 73.5 grams Here are some teaser specs of the new Stage 2 CNC porting option: Intake port volume: 310 + cc Exhaust port volume: 105 + cc CNC flow rate of intake port is 55 + cfm over stock flow with very strong mid-lift improvements using stock 2.125»
intake valve size: 2.125» 96.2 grams (hollow
stem) Stock exhaust
valve size: 1.590» 73.5 grams Here are some teaser specs of the new Stage 2 CNC porting option:
Intake port volume: 310 + cc Exhaust port volume: 105 + cc CNC flow rate of intake port is 55 + cfm over stock flow with very strong mid-lift improvements using stock 2.125»
Intake port volume: 310 + cc Exhaust port volume: 105 + cc CNC flow rate of
intake port is 55 + cfm over stock flow with very strong mid-lift improvements using stock 2.125»
intake port is 55 + cfm over stock flow with very strong mid-lift improvements using stock 2.125»
valve.
The
intake valve diameter was 30 mm, exhaust
valves diameter was 27 mm,
valve stem diameter was 6.5 mm.
But engineers made a lot of changes to bring the Boss 302's horsepower up to 444: sophisticated new cylinder heads, a new
intake, hollow -
stemmed valves, a new camshaft and lighter pistons and rods.
Intake port volume: 295 cc (peak stock flow 309 cfm) Exhaust port volume: 106 cc (peak stock flow 194 cfm) Stock Combustion Chamber Size: 60 cc Stock intake valve size: 2.125» 96.2 grams (hollow stem) Stock exhaust valve size: 1.590» 73.5 grams Here are some teaser specs of the new Stage 2 CNC porting option: Intake port volume: 310 + cc Exhaust port volume: 105 + cc Picked up 80 cfm by.600
Intake port volume: 295 cc (peak stock flow 309 cfm) Exhaust port volume: 106 cc (peak stock flow 194 cfm) Stock Combustion Chamber Size: 60 cc Stock
intake valve size: 2.125» 96.2 grams (hollow stem) Stock exhaust valve size: 1.590» 73.5 grams Here are some teaser specs of the new Stage 2 CNC porting option: Intake port volume: 310 + cc Exhaust port volume: 105 + cc Picked up 80 cfm by.600
intake valve size: 2.125» 96.2 grams (hollow
stem) Stock exhaust
valve size: 1.590» 73.5 grams Here are some teaser specs of the new Stage 2 CNC porting option:
Intake port volume: 310 + cc Exhaust port volume: 105 + cc Picked up 80 cfm by.600
Intake port volume: 310 + cc Exhaust port volume: 105 + cc Picked up 80 cfm by.600 lift!
They include the use of lighter, hollow -
stemmed valves, a different camshaft and an improved air
intake system.
This 6,162 cc V8 also gets new cylinder heads derived from those for the 7.0 - liter LS7 V8 featured in the 500 - horsepower Corvette Z06, with low - restriction, large - capacity
intake ports plus lightweight, hollow -
stemmed intake valves that are about 9 percent larger.
• HPE700 Camshaft • Lightweight hollow
stem intake valves, exhaust
valves.