06 TRed GTO

What size cams are you guys running in with a N/A 408ci

I am having a custom cam made and I am just trying to get a ball park of what you guys are coming up with for different sizes. I am thinking of something in the hi 230's/ and low 240's with a lift around .560's so I can run z06 springs to help keep the valve train noise to a min.

I will be running the stock truck intake ( I know ,I know I am just going for the stealth look) and will be running a 100-150 wet shot on top of that.







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ZZebes

iTrader: (10)

Run a set of patriot duals don't run Z06 springs with that big of a cam

my patriots are dead quiet

99Silverado5.3

iTrader: (7)

Running a truck intake on a n/a 408 is going to keep you very limited.

06 TRed GTO

I agree thats why I am going with spray also. If I make it to the 380-400 RWHP N/A I will be happy and then spray it to 500+

ZZebes

iTrader: (10)

I made 380 on **** heads and an X1 cam with a 6.0L

joshua022

iTrader: (12)

I mad 390 on a stinkin 5.3!!! if the truck intake will hold a 408 back that much I wouldn't even do the swap... why waste all that money?

chris04

iTrader: (6)

i don't think the truck intake holds it back like everyone thinks and this is my opinion, my buddy has a rcsb 2003 with a 408, his cam is a 232/236 with like a 630ish lift, not too sure tho, but with truck intake and stock injectors he put down 423rwhp, and his injectors are maxed out of course, and don't get me wrong i know that a different intake will help but i just don't think the truck intake hurts it like everyone makes it out to be....

tarinitup

iTrader: (11)

I was spec'd a 238 242 .612 lift for a 402 with truck intake. New cam going in is a 239 251 .619 .630 on XER lobes for the 402 ls6 intake and 250 shot.

rgvsierra

iTrader: (7)

mine is a 246-248 112.

99Silverado5.3

iTrader: (7)

If you'd be happy with 380-400rwhp, get a 6.0L and spend that extra $2000+ elsewhere. A full bolt-on cam 6L w/ stock 317s and truck intake will get you that.