AFR 205's for a 408?

[Bouvers]

Are the valves on the AFR 205's too small for a 408?

Is it a weak combination?

[Frost]

No and no, but it also depends on what you are looking to do...

[Cohi]

Are the valves on the AFR 205's too small for a 408?

Is it a weak combination?

Not to sure if they are weak but it all depends on the parts in the motor & what you are trying to do with the car. The place I go to Virginia Speed built a 408 Stroker motor out of a 6.0L truck block going in a 02 Camaro 35th.I talked the them they used Trick Flow 235's on it. I watched it be dynoed and it made a crap ton of power.
From what I have heard though AFR's are nice as far as casting goes but junk when it came to the internals meaning springs and such.

[Cayenne97]

Are the valves on the AFR 205's too small for a 408?

Is it a weak combination?

I like to see 205's on smaller cubed engines. I'd suggest nothing under 225cc's.

[Frost]

I like to see 205's on smaller cubed engines. I'd suggest nothing under 225cc's.

have made 540 on a 402 with these with monster mid range tq.

It is a common misperception... not saying that the 225s won't work, but you can't really tell him what head to run until he gives the whole picture,

[Bouvers]

well there is no picture I'm just curious there is a slight chance I might want to go to a Aluminum LS2 408 stroker in the future and I was wondering if along with the whole rotating assembly and a new cam I could be done and change over everything I have from my present build and still get full power out of it.

Current

346 stock rotating assembly
228/230 cam
Ported FAST92
AFR 205's 62cc
full valvetrain upgrades
full bolts on with exhaust cutout

I chose those specs primarily for a strong weekend warrior LS1 my chances of building up a 408 are ALOT better if I don't have to get different heads along with a cam when doing it...

[Frost]

that thing would be a stump puller with those H/C!

You could put a little coin into having them ported if you can spare it. I'd sell that cam on the forum and go with something slightly different if feasible...

[Bouvers]

well I was definately going to get a better cam as I imagine there would be one better suited for a 408 my main concern is whether or not my heads would be miss-matched since I just dumped TONNES of coin for them... I'm thinking maybe porting them but is there just way better heads out there?