509stroker_ace

does anybody have the flow number of the tfs heads, and would they be worth the extra 100$ over the tsp's?

Darkman

iTrader: (2)

TFS As Cast 220

Intake Exhaust
100 67 47
150 100 76
200 133 104
250 172 136
300 211 167
350 236 185
400 261 202
450 277 212
500 292 222
550 299 229
600 305 233

tillery

iTrader: (4)

Don't have flow numbers but I have a set of each.the TF 220s are worth the extra. Can't Really appreciate the TFs over PRC until you have the two in front of you. But They have revamped their CNC program and are putting out a better head now than before
Just wish they would smooth off the edges.

on2

iTrader: (4)

Comparing flow numbers is not a good way to compare heads.

Trying looking at results from people running those heads.

Chris05ssTruck

iTrader: (9)

And in this case the results confirm the flow #'s. TFS as casts are WAY better than the tsp stage 2.5's.

SOMbitch

iTrader: (8)

The TFS as cast were worth 19/19 over my PRC 5.3's...... Same dyno pulls made 2 days apart......

SSmoken

iTrader: (26)

just bought the tfs 220's. SOMbitch - what cam you have???

509stroker_ace

pretty good case gettin made fore the tfs and the 100$ should be worth it

SOMbitch

iTrader: (8)

An El Torro variant. 230/234 111+2

If I ported my FAST and went with a bigger MAF & 95mm lid 450+ is realistic.....

desertLS1

iTrader: (8)

Won't you need the yella Terra roller rocker to go with the TFS heads?
Any aftermarket rocker isn't cheap.

SSmoken

iTrader: (26)

oh **** !!!!

desertLS1

iTrader: (8)

Yeah so it really ends up being about 2100 or so with all the parts you have to buy, head bolts, gaskets, & of course roller rockers...

chrs1313

iTrader: (24)

no no no you do not have to run roller rockers with TFS heads...they have the same guides as any aftermarket head, afr etc...so afr's should have roller rockers too...don't believe all the hype

read this thread

https://ls1tech.com/forums/dynamomet...-421-rwtq.html

also the 220 as cast are about one of the best bangs for the buck right now...I believe RPM was running a special for 1680 shipped with free milling and a set of pushrods...that's a great deal...

odarabla

iTrader: (1)

It is recomended but not needed. You can use your stock rockers on the TFS heads if you want to. Just contact TFS for more information.

Jason 98 TA

iTrader: (4)

Your going to be looking at heads & rockers to get the TFS setup running if you have a camshaft under .600" lift. If you want to run over .600" lift you'll also need a valve spring upgrade. In other words your comparing a $1500 set of heads to $2200 for heads, rockers, springs!?!?

You might consider the PRC 215 or 227 heads if your considering spending that much $$$. They will use a stock rocker system & sell fully cnc ported for the cost of a as cast head...

427LS7HCI

Whats the difference between the PRC 215 or 227 and the PRC stg 2.5 LS6?

litle88

iTrader: (20)

I bought my TFS 220's from Vengeance it was $1800, milled to 60cc's and with the upgrades springs good for like .670 lift I believe. I put down 457 and 400 on a mustang dyno. Hands down best bang for the buck.

509stroker_ace

thats a very good question

Sales2@Texas-speed

iTrader: (5)

They are really apples and oranges. The Stage 2.5 LS6's are a ported GM casting. The 215 and 227 heads are our aftermarket casting designed to compete with the AFR and TFS heads. They have the laid over valve angle that offers a bit better piston to valve clearance (even with their larger valve size) so you can run larger camshafts without flycutting your pistons. They are have more room under the rocker rails so you can run a multitude of different/bulkier rockers without having to grind on the heads or rockers. The aftermarket casting has added material in crucial places around the chamber that give them added strength under higher pressure (power adder combos) so you don't have the issues with heads lifting like you do oftentimes with the GM castings. Also, they can be had with 6 bolts which also helps prevent lifting when run on the LSx 6 bolt block!

These aftermarket castings are the culmination of years of developement and design. We've been very pleased with them so far!

King Nothing

iTrader: (9)

here is the flow numbers for my heads heads are in my sig
Valve Intake Exhaust
.100" 70.1 58.1
.200" 142.4 119.1
.300" 202.0 167.2
.400" 246.1 205.6
.500" 287.7 221.5
.550" 300.8 229.7
.575" 307.2 231.9
.600" 311.6 233.9
.650" 312.7 234.4