We were seeing 5.5 lbs of boost with the TVS 1900 until 6000 rpm when it bumped up to 6.5. Yes you will probably need some springs. The beauty of the TVS is the huge and consistent torque which allows you to use a cam that raises the rpm for your max power. I also like the 224/230, .612 .612 116LSA better than the 215/230.

 

does the radiator have to be removed in the trucks for a cam swap?

 

i was talking to the guys at thunder racing and they said to go with the 215/230. He said they run it in there magnacharger/procharged vehicles.

 

get patrick g to spec one to your mods over on ls1tech. $25 well spent so I hear.

 

I would suggest you get some more dyno graphs before you make a decision. Lets see where the power meets the dyno. If they haven't tried a number of different cams then it's all a guess. Nothing against Thunder Racing but lets see some numbers so we can see the strengths and weaknesses of their suggestion. If they are doing a lot of motors they should have some dyno graphs.