Im building a 408 with 11.1 cr and .566 / .568 cam wondering what to expect for HP and what you guys with one are putting out or running in the 1/4.

 

Can you be a little more specific on your motor specs??? Cam duration, heads (ported), intake, headers etc.

My N/A 408 was able to hit 613HP on the engine dyno with a base tune. I expect after some wear-in and tuning, 625-650 isn't out of the question. I really wanted to see where the power was made rather than peak numbers and to break in the motor in a WOT situation. I am happy with the results.

 

cam is 222/224 566/568 112 and 243 heads polished and mill to 64cc shorty headers, magnaflow y pipe. It,ll be N/A

 

What size Injectors do you have.

 

222/224 with a 408??????????? get a bigger stick for HP i mean thats a good stick for a 5.3 not a 6.6 or whatever it is!!!

 

get a cam atleast around 236-238. ls6 heads are 64cc stock. how much did you have them milled?

 

my cam specs is a 230/244/598/612/114lsa on a 408 my compression is 11:8:1

 

I think that will be a great cam for a daily driver 408. I've driven them with smaller cams than that. With that cam you should be able to make 450RWHP and have it drive nice. Just because it's a 408 doesn't mean it needs a big cam. Bigger flowing heads are more important than a bigger cam with the big cubes.

 

Thats what i though but couldnt remember for sure it was like 2 yrs ago the shop that did them couldnt find any # from when they did them. I thought that we went to the 5.3s 61.1 cc they took off .045. It will be a DD untill I can find a RCSB to put it in.

 

I am running the FAST 36#rs. At my fuel pressure, they flow ~41.