LSXS10

iTrader: (37)

Looking at buying a set of the 6 bolt trick flows 235's or the PRC 227 or 237 heads... Just looking for some thoughts on them. They will be on a 370 for a couple months then moving to a 427 LSX combo. Thanks for any helpfull info.

LSXS10

iTrader: (37)

Nobody has run either of these heads????

TJ

iTrader: (10)

with a 427, have you thought about the tfs 245 head?

LSXS10

iTrader: (37)

I need something that will work on the 4.00 bore for now...

BigRich954RR

iTrader: (1)

TFS235
get these

Jason 98 TA

iTrader: (4)

I think you cant go wrong with either the 237PRC heads or TFS235 heads. Both will grow very well when you swap to the bigger bore. Both heads have been proven to make great power. The advantages with the PRC heads is you don't need aftermarket rockers, we're currently offering free spring upgrade to .675 or .700" lift spring kit, and better pricing.

If you buy the TFS I think you'll need aftermarket rockers, a upgraded spring kit, and a little bit more $$$ out of your check book.

TFS Heads from Summit : $2449.99
Good spring kit for anything over .600" lift $300
Rocker System $500+

So your looking well over $3,000 for a set.

PRC heads are right over $2000 with good springs & you can run stock rockers...

LSXS10

iTrader: (37)

Hey Jason, Do you have some links to flow numbers and specs such as deck thickness and other info i couldnt find much on the web site. Have you done much testing with them? Just post or PM it to me. Thanks...

SIC LSX

iTrader: (10)

what about cam shafts with both heads?

LSXS10

iTrader: (37)

Ill be running a 239/254 60x/61x on a 114 for now in the stock block motor. Will step it up with the LSX block build.

TJ

iTrader: (10)

why such a big split for a ls1 port-head?
anyone spec a cam for you or is it off the shelf?

DSRE

iTrader: (7)

I talked with tfs about their springs and for a die hard DD. 600 lift is what they recomend just for reliability but are good to. 650 lift and are stout springs fwiw

LSxPwrDZ

iTrader: (4)

I bought my TFS 235's from TEA and they milled the heads to the right combustion chamber size for me and installed all the springs and valves and seals for me and came with .650 lift springs already. Shipped to my door was under $2475!!!

My flowsheet looks like this on my TEA TFS235's

LIFT---Intake--Exhaust
.100"----68.5----53.9
.200"---145.5---126.5
.300"---232.3---201.1
.400"---291.9---247.8
.500"---328.6---270.4
.550"---341.2---273.2
.600"---347.1---277.0

Brian Tooley Racing

iTrader: (13)

All TFS LS heads are shipped with what they call their "Max Pressure" springs. These springs have as much lift capacity and more pressure than an Xtreme spring and also have better durability as verified by independent spintron testing. So this is not an accurate statement.

LSXS10

iTrader: (37)

The cam was for a L92 / 370 combo that was a max effort small shot deal. Im sure another cam would work better but i have this one to get me by plus its new, i would trade for a better cam for this setup if i could find one. Like i said the 6.0 motor is just a getmeby.

LSXS10

iTrader: (37)

I tried to get in touch with you monday or so but talked to another guy there and got the info i needed. Derrick @ BB&T will be calling you in the morning to order my heads. Be nice and do that extra little bit of blending... I have places to be. Heath.....