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Thats one of my concerns, I know duration also plays a large role in PTV issues.
Checking one of TSP's big cams, a 244/248, it says will run into PTV issues & not for "stock engine applications". As that cam only has .615/.615 lift with a bit more intake duration. Sounds like it may be getting close.
Stock LS1 shortblock. When it gets dyno tuned, shift points will be adjusted accordingly.
You need to cam for intended rpm. The cam you listed needs 12:1 compression and 7600-8000 rpm shift points. My reason for asking your intended rpm was to determine if the cam is right for your rpm range. I assumed you would correct all that during tuning.
Originally Posted by Newbomb
Will it make manageable 400+rwhp?
No it will be lumpy, rowdy, a pain in the asa in parking lots, etc. plenty of street cams that will get your power over 400 and be a lot less pain in the ***.
Originally Posted by Newbomb
I also can use the thicker ls9 head gasket.
That is the last thing you should do. Tighter quench improves resistance to detonation. You want a 0.041 gasket. Thinner not thicker.
Bottom line, I think you should consider a smaller cam. Something in the 226-230 range in the intake and 232-236 on the exhaust.
That's a big cam for a stock ls1, it'll prolly make 400 h.p., but you'll lose low end torque, and it will run like *** anywhere but w.o.t. Don't use a head gasket to adjust p.t.v.clearance, it will open up your quench and make it more susceptible to detonation. Stay with 227-232 degrees intake, and 232-236 exhaust for good manners.
99 Z28
LS1 motor
LS6 Intake
243 heads with TSP .660 kit
1 7/8” headers with true duals
SS4000 converter
3.73 gear
Id like to run a hog a$$ cam until I go turbo in a couple years...basically max effort NA...I know it’s a big cam, but will it work decent?
As everyone has already said, it's a bad idea. This cam will want to rev relatively high but you will be fighting your LS6 intake above about 6200rpm. A cam in the 22x/23x duration will work much better and still lope pretty hard.
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Hog A$$ Cam 
