Comparing Sheetmetal Tunnel Ram to cast single Four

Your gonna need a big scoop Nick............

They are ok, driving through the pits kinda suck though, really got to pay attention as you can see anything on the other side of the thing lol.

RGL wrote:I have not fooled with the tfs TR before, but i'd be intrested in how much CSA there is available at the runner entry in the plenum, or how big can it physically go before welding,ect ? runner lenghts would also be nice too.

The new style TFS A-460 tunnel ram has really thick walls. Probally on the order of .250"+. I have never seen anybody have to weld the outside of the runners, in order to physically port them larger. I would say if a guy did have to weld the outside of the runners, then he probally screwed up somewhere in his porting efforts. It's a very good manifold, and on the old forum we saw where Frank Merkl made 1440? Hp with his 572 CID C-460 headed engine, my adapter plates, and the TFS A-460 tunnel ram intake maniold, on spray.

Hope this helps,

Charlie Evans

RGL wrote:thanks Mr evans , i had never seen one in person , just wanted to know if it had enough meat in it to put 30%ish taper into the runner for some profilers , sounds like it might have it

Well, IMO a 30% taper is a little too much. I think Darin Morgan at ProFiler would agree with me on that. I have been encouraging both Darin and Micheal Greene at ProFiler to make a dedicated tunnel ram intake manifold for their Ford 205 heads. I've been doing it for about 1.5 years, and honestly they haven't shown too much interest. So, I do make an adapter set to put the TFS tunnel ram 2 X 4 intake manifold on the ProFiler # 205 heads. You need to realize that the ProFiler ports are raised +.200" over the Ford C-460 heads. Therefore this adapter plate has to be thicker, than the C-460 adapter plates like what Nevs has. I presently have two sets of them in stock, (along with taller china wall spacers) and ready to ship. Note, that because they are thicker, they are heavier.

Hope this helps,

Charlie Evans

We did the dyno testing for TFS using the pent roof top on George and Carl Keown's 572 TFS A-460 headed engine. That was several years ago, but I do remember that the EGT's were very consistent for all 8 cylinders and showed absolutely no fuel distribution problems. I gave copies of the dyno pulls with both the 2 X 4 top and the pent roof top to Ron and Mark at TFS.

Hope this helps,
Charlie Evans