I built my engine last winter and have had it installed and running all summer. I have a 402ci, forged bottom end with 9.1:1 compression for turbo. I wasn't super impressed with this engine after going from a stock 4.8, but I also know with the compression it probably isn't optimized for NA operation.

Current cam specs are 224/228/112, .535 lift. Should I look at swapping it with something else while I work on the truck and turbo over the winter? Is the LSA too tight on this one?

Everything else about the motor is stock, 317 heads, intake, etc.

 

The cam isnt all that aggressive, but for a turbo its not bad. Turbo's arent nearly as picky as NA or superchargers are. You could gain more power with a different cam, but or the most part people just crank up the boost and let the turbo do all the work.

As far as the engine feeling sluggish... 9.0 compression will do that to you.

 

Nah, its not too bad bud. Could be bigger tough.

 

What heads are on it?

 

I was about to ask the same thing...lol

 

if'n it's a stock headed 402 then that'll explain a lot, but either way that's a tiny cam for a 400" engine.

 

From his original post he stated everything else is stock, so it looks like unworked 317 heads.

 

it needs more cam for sure.. even when you turbo it I'd want more cam in it

 

I would run it. I wouldn't run anything bigger than a low 230's duration cam for a 1000+ rwhp 400ci turbo set up, but that is just me. While it could be changed and spec'd a bit different, I don't think it would be worth the change/time/money. That should be a good cam for your set up and give decent low/midrange tq.

 

I think a TU1.5 speed inc cam would go really well. I think they are on sale too.