LS9 Cam
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http://www.liljohnsmotorsports.com/
http://www.liljohnsmotorsports.com/
The intake valve close event is very late and IMO is not optimum for most combinations, if any other than its intended original purpose which is an OEM 6.2L positive displacement blower application.
The intake valve close event is very late and IMO is not optimum for most combinations, if any other than its intended original purpose which is an OEM 6.2L positive displacement blower application.
Bore and stroke/displacement?
Compression?
Cylinder heads?
Intake manifold?
Turbo used?
Trans?
Stall?
Rear gear?
Race weight?
Tire size?
These questions will get us going on the right track to specifying the right camshaft for your combination.
Bore and stroke/displacement?
Compression?
Cylinder heads?
Intake manifold?
Turbo used?
Trans?
Stall?
Rear gear?
Race weight?
Tire size?
These questions will get us going on the right track to specifying the right camshaft for your combination.
Bore and stroke/displacement - 4.030 bore, 4.000 stroke/408ci, 6.7 liters
Compression - 8.5:1-9.1:1
Cylinder heads - L92's, or AFR 225/235's, haven't looked too much into them.
Intake manifold - Holley Hi-Ram because it looks friggin awesome and performs pretty good.
Turbo used - PT88
Trans - Built 4L80, and somehow beef up my transfer case.
Stall - Circle D 3,200-3,400 stall
Rear gear - 4.10:1 to 4.56:1
Race weight - Truck weighed in at 6,800 pounds with me in it on a scrapyard scale, will shave a little weight off but not much.
Tire size - 35's on the street, may find lighter rims and radials or slicks if traction is an issue, but that's what four wheel drive's for!
This is just my initial plan, I am always open to opinions!
Compression - 8.5:1-9.1:1
Cylinder heads - L92's, or AFR 225/235's, haven't looked too much into them.
Intake manifold - Holley Hi-Ram because it looks friggin awesome and performs pretty good.
Turbo used - PT88
Trans - Built 4L80, and somehow beef up my transfer case.
Stall - Circle D 3,200-3,400 stall
Rear gear - 4.10:1 to 4.56:1
Race weight - Truck weighed in at 6,800 pounds with me in it on a scrapyard scale, will shave a little weight off but not much.
Tire size - 35's on the street, may find lighter rims and radials or slicks if traction is an issue, but that's what four wheel drive's for!
This is just my initial plan, I am always open to opinions!
There will be a noticeable difference in the required valve events for a L92 head and for a cathedral port head. That will need to be decided upon before the camshaft is specified.
There will be a noticeable difference in the required valve events for a L92 head and for a cathedral port head. That will need to be decided upon before the camshaft is specified.
Dang thing is heavy!
Dang thing is heavy!








