Im putting together a 408ci right now that will be used with an 80/85 turbo around 8-10psi for the beginning. I eventually plan to move up slightly with boost, but nothing drastic. I'd love to eventually see 1000whp on e85, but I'm just looking for about 700whp or so on 91 and water meth for right now.

I'll be using a Trick Flow 220 Gen X as cast head. It flows about 306 at .600 lift and my cam is .221/.224 .600/.600 114LSA profile. With all that said, can I most likely reach my goals on this head, or should I be looking at some porting options?

 

Yes, port them.

 

You can reach your goals without touching them.

 

[QUOTE=nolanator;19496552] around 8-10psi for the beginning. I eventually plan to move up slightly with boost, but nothing drastic...........

I'd love to eventually see 1000whp /QUOTE]



As for your heads, people have made more with bone stock factory castings. Porting will help you see you goals with lower boost settings.


But while you have them out, do it. Why not right? Already have the money tied up in a built motor-why stop there?

 

I'm a fan of not porting on a turbo build. Go with a better head or leave those alone.

 

if you got the money and the time, why not?

 

I guess a lot depends on who is porting them ! What they flow now vs what they might flow after any work.

But they're already aftermarket heads so will be an improvement over most stock type heads.

They'll have no difficulty making power with the right supporting components

 

If you plan on using the cam you have don't port them. If you don't mind paying for porting, and a custom cam to optimize the new flow characteristics of the heads after porting then go for it.

 

Is it an aftermarket block? You can easily split the OEM block (esp. with a 408) on an untouched OEM head casting. More so on a TF 220 head. Blocks the weak link at this point. No point porting those heads on a factory block with your goals IMO.

 

Just my opinion, but why pay top dollar for an aftermarket head that then needs porting? Either feel good about your choice of parts, or buy different ones.