i had a 40 over 308 with tfs stage I, roush 200 iron heads with a holley systemmax intake i mad 286rwhp and 308rwtq.

 

on a mustang dyno or dyno jet?

 

306rwhp on a 331? That seems really low.. what are the flow numbers on a roush 200 head?

 

I'd say that's a bit north of 325whp on a Dynojet.

 

Not quite the same combo, but 340 rwhp, 375 tq at 7# boost through an AOD. I've since added another 1.5# boost and converted to an electric fan, but not dyno'ed yet.

 

ported/milled Roush 200 heads by Chris Howe, stock 92 shortblock, 1.7s, ported RPM-II, 1 5/8 long tubes, 2 1/2" x-pipe with super 40s, t-5, 3.73s.

Put down right at 300rwhp and 312rwtq with the stock cam.

I couldn't find that graph, but I do have the one with BBK shorties, 2 1/4" flowmaster old 40 series with tailpipes and 1.6s . . .

 

extensively ported sr's (same stuff basically), 2.05 valves, stock botttom 302 (homemade flycut pistons), solid roller (i thnk like a 612 lift or so) and a 150 shot made 602rwhp, on a stock block/bottom end

 

it was on a mustang dyno

 

My main reason for this thread is to see if anyone has a 350+rwhp N/A roush headed combo, IM thinking about getting another cam, cause I think I undercamed my motor, Ive heard these heads do best with higher RPM's and the TFS stage 2 doesnt pull me past 6000rpm but the stage 3 is made to pull to 7000rpm and I think it would unleash a bit more power.

 

Figure i would throw in my 2cent's. I would be careful of that high of rpm (7k) with a stock block. I know its not a lot of HP but the rpm's will kill a stock block also. Iam sure there is guys out there pushing there stock block to that rpm and higher but just like as soon as you start to make serious HP with a stock block its a ticking time bomb.
good luck
Erik

 

I have never seen a Hp curve so flat. you were making good power with the stock cam.

 

I put mine on a dynojet and it dynoed out at
312rwhp 348tq and for some reason the A/F ratio was lean in the 13.5's and on the bottle it put 405hp 507tq and the A/F was 13.2

but I also found that my alternator wasnt puting out the correct amount of voltage so i replaced it and the car feels like whole new beast so I guess back to the drawing board.