GN-1s vs. champion iron head CCs?

[49-blues]

Whats the difference in CCs between the aluminum gn-1s & the champ irons?

 

[WIKEDV6]

I thought they were both 45-46cc's, I could be wrong!!

Prasad

 

[HIboostGN]

I loved to know the runner volume myself! I have 2 sets of GN and a set of M&A but there all been ported

 

[bison]

I didnt cc mine but took tom's word for it that they were 46cc. They are GN1 race port. Ive cc'd stock heads and seen 46-49 cc's depending on the valves and amount of milling.

 

[jasjamz]

Dug up an old thread!!
Anybody ever seen a set of Champion Irons milled down to 40 cc's?
I see a set posted on here.

 

[bison]

No but i did cc the heads in my prior post and they were indeed 46cc. Jason i wouldnt rec using a40cc head. They have likely been milled a crap load and will cause intake fitment issues and also integrity has been taken away from an already flex prone casting

 

[jasjamz]

Thanks Brian! Stock Turbo's headed your way this week!