Originally Posted by PSIG
Nice. Thanks for the good info. Surprised and a bit disappointed at the numbers with those huge ports. Even the little Twisted Wedge TEA 185's flow better than that on a small bore and lifts under .700". I guess they're after the big-bore super-lift buyers, eh? Hmmm... With runners that large, I guess if a duck quacks, it still won't echo? LOL... never mind.
Typical TFS TEA ported 185 flow:
Trick Flow Twisted Wedge 185
Lift Intake Exhaust
.100" 72 58
.200" 142 114
.300" 215 152
.400" 259 189
.500" 287 220
.550" 296 229
.600" 300 234
The problem I have with TFS heads is the things that require changing. TFS (Canefield too) have tweaked their heads to get those number, unfortunately - in many cases its enough to make it difficult to fit headers as well as require relocation of valve clearance 'eyebrows'. For a dedicated race engine, not much of an issue; however, if you didn't start out with them in your build or you don't want to compromise with collectors hitting the floor boards, its going to cause problems.
You have to look at the whole picture, what the guy is trying to acheive before just going for the "big numbers". I know of more than a few guys who have ended up selling their TFS heads and bought AFR, World product or other once they came down off the max effort or bust game plan.
I got nothing against TFS ... other than their fitment issues and sometime the need for special requirements to deal with their geometry changes.
I haven't research the 18deg Man o war heads or FMS "N" heads they may have issues too.