25thhawk

iTrader: (3)

I have a set of new lsa heads that I have been thinking about getting ported, but have been looking at the tfs 255's also. Which is going to be better? These will be going on a sbe 6.0L with a ysi. Thanks

Ryan

TurboAv

iTrader: (6)

If you do the Trickflow's get them bare so you can do your own valves and spring package. You already have the lsa's. I would run them.

slowlsx

iTrader: (28)

I have a pair if the tfs 255's, by what I have seen they outflow any cnc ls3/lsa head and when yiur send a ls3 ir ksa head out they increase the port to sonething around 260-270cc and still the 255's outflow them which means youll have more under the curve. If you plan to build something serious later on I would do it just for deck thickness but as far as power gains im unsure how much more youll see in a boost application. .. if I had to guess 30-40 up top and a little more under the curve

25thhawk

iTrader: (3)

Flow numbers don't look too much different between the two. The tfs flow more on the intake, but with a larger bore 4.0 vs 4.06. The lsa flow 20-30cfm more on the exhaust, which I think would help alot with the supercharger. The lsa's end up being more money after porting and I know that the deck isn't as thick as the tfs heads. So not sure if I wanna put the money into them or just sell them and get the tfs heads.

Ryan

rotary1307cc

iTrader: (5)

U have the LSAs. Do a little work on the exhaust and run them

slowlsx

iTrader: (28)

How large is the port tho on the lsa heads after porting? Pretty sure its larger than the tfs so youll probably lose velocity = under curve torque and power. How much who knows

TurboAv

iTrader: (6)

I would leave the intake port basically untouched. Just get that stupid wing deal cut down and do a little port work on the exhaust.