I agree the intake is definetly holding it back, but i was really happy with what it did as is. I wasn't expecting anything over 450. A 90/90 setup will eventually be on it but i'll be saving for a while for that one.

 

why wasnt you expecting those numbers? hell 5.7s and 6.0s make 450rwhp. so why wouldnbt a 408 blow those numbers out of the water

 

Just looking at dyno numbers on tech i saw guys with way better intake setups and expensive heads putting down numbers like these, thats why i was surprised.

 

thru a 6speed, you shouldnt see no less then 5xx, but if you didnt rev the motor where it needs to bethat could be where the loss of power is

 

dang Quick ! I agree... I was thinking.. must be a small cam with dyno sheet. I did think tq fell off pretty fast.. but who cares ! ... Its not Dyno queen ! but thats spot on for another 408 with Stage 3 mti heads 9.5:1 compression... and ls6 intake... his sheet was almost an overlay of yours... Vette runs 11.70s on the motor...

 

sorry if I missed something but is your motor a 5.3?

 

nooooooo. 408 = a 6.0L bored and stroked to 6.7L or 408 cu.in.

 

Lol my bad I seen it said dynoed 408 today so I thought thats what you dynoed. Now I feel stupid for not catching that when I read your post. agh haha ddduuurrrr!

 

The torque fell off because of the intake and also we only spun it to 6k. Eventually it will have a 90/90 on it and spin to about 7500.

And its got Patriot stage 3 heads and 11.3 compression

 

spin that bitch, make numbers walk away with a grin