00blacka4

iTrader: (7)

this is what i pretty much have it narrowed to for heads on a ls2 402 4in. stroke and bore, post up what you think but post WHY !! dont just say "mast" "trickflow" give a reason..

now the Trickflow "advertises" like 8 more CFM at .600 than mast, but who knows if their numbers are bogus on TEA's website, they have some pretty rediculous exhaust flow advertisement....

but also, the MAST is an 11 degree head where as the trickflow is a 13 degree head

dwill73

What's the application, what intake, efi or carb setup, solid or hydraulic cam, what's your goals, etc.

Jimbo1367

Remember their flowbench will all flow differently. ie different #s from the exact same head. I noticed TEA does advertise high exh. numbers. I would just get the 235TFS from TEA

99creelz

iTrader: (4)

Check this out http://www.hotrod.com/techarticles/e...der_head_test/

carreras

iTrader: (7)

I haven't read up much on MAST heads, i know they're a great product on lsx blocks. I love my TFS 235s on my 408, i put down 560rwhp

Mez

iTrader: (1)

My advise is totally ignore what you see on the vendor website. Look at the test results. An earlier post had the link to the Hot Rod test of 11 heads. The head that made the most peak HP was from Pro Comp. It advertised one of the smallest intake ports volume at 219 cc and only 321 CFM.

The point is don't just make your decision on specs because there is a lot more involved than port size and CFM on the flow bench. The key is port velocity which does not show up on the flow bench.

There is test this month between two Mast heads in GM High Tech Performance magazine. The smaller cathedral port LS1/2 head and the bigger square port LS3 head . The square port head tested at ~30 CFM more than the smaller cathedral port heads. Guess what? They made almost the power within a couple of HP but the cathedral port delivered much better low RPM torque.

Forget the specs. My LS2 with GM 243 heads CNC by Lingenfelter and a very small GT-11 cam made 473 rwhp recently.
Also check out the TF225.

Silver408z

iTrader: (1)

I dont think you can go wrong with either head. Both are going to make good power. Long as you buy the right parts for your setup name brand isnt really going to matter. When you are talking about top quality parts trickflow, mast, afr and others like that, it isnt going to matter. If you are talking budget heads vs a top name then yes it will be harder to obtain the big power numbers.

00blacka4

iTrader: (7)

Iv been talking to someone from mast thru PM on here, and he wants me to go with the 245, when i asked him why for my 4 inch bore he said because its not stock displacement, he said he would recommend the 215 or a 235 with a stock displacement he said for a bigger cube motor like mine a 245 is the way to go

racerfox

iTrader: (4)

WCCH 245's and never look back rich is the man in making power in heads

SIC GTO

What cam and intake are you running?

1nastyss

iTrader: (12)

Yeah, no ****

carreras

iTrader: (7)

Custom hyd roller, vic jr w/ 102mm setup