jaber911

new release 215 version from AFR
215cc LSX Mongoose Street Aluminum Cylinder Head
http://www.airflowresearch.com/lsx-215cc-c-10_115.html

and
Trick Flow Cylinder Head 215

who Winner ??

RJB01camaross

Sounds good. I hope independent dyno results are coming soon before I start my next LSX project!!

MelScrilla

iTrader: (2)

this would be great. since the tfs heads are supposed to make more power up top then the afr 205's but now with the 215's it might be equal but with the afr's you wouldnt have to buy the roller rockers

Rossi396

iTrader: (1)

Another dyno graph needed! Which will spurn another three pages of arguments!!

The Alchemist

iTrader: (19)

Take note that the AFR 215s require a minimum of 4.135 head gasket and I'm guessing bore as well. That's not ls1 or even stock ls2 bore. You have to either have an ls2 increased or get an ls3 block for that.

transaman98

iTrader: (16)

this may be a stupid question but why do you guys think afr lists the LS6 as the suggested manifold to use with these heads?

Patrick G

iTrader: (14)

From what I've heard, the new AFR 215 heads will work very well on a 3.900" bore. Lessons learned over the years have shown that a combustion chamber slightly larger than the bore gained more power on a 3.900" bore than running a 3.900" chamber. For what it's worth, the TFS 215 heads also run a larger combustion chamber than 3.900". We all know that the TFS heads make excellent power. A head to head shootout in the future will be fun to watch.

allthrotle

iTrader: (2)

I had the chance to talk to tony at afr and he told me that these heads would work fine on a 3.90 bore. and everyone knows that Mr. Mamo knows his stuff.

jaber911

Tfs 205
intake - exhaust
0.100 66 52
0.200 135 109
0.300 203 165
0.400 257 209
0.500 287 222
0.600 299 237

Afr 205 cc
0.200 140 112
0.300 200 170
0.400 251 203
0.500 281 221
0.550 292 226
0.600 298 230


Tfs 215
0.100 68 55
0.200 142 155
0.300 215 185
0.400 269 230
0.500 305 251
0.600 320 259

Guess numbers flow
AFR 215
0.200 147 158
0.300 212 190
0.400 263 224
0.500 293 250
0.600 319 252

RJB01camaross

Hopefully Tony will give us some inside info on these new heads soon.

lovescamaros28

Not to insult your knowledge,but...3.900" combustion chamber? When did we start measuring combustion chambers in inches? I assume you are talking about head gasket diameter in comparison to bore diameter?

caviness

iTrader: (14)

im in for the updates on this,i need sum heads bad,and these are what im looking at.

hammertime

iTrader: (1)

Yes, combustion chamber volume is generally measured in CC's. The surface area at the deck is also generally matched to the diameter of the bore. What Patrick has alluded to is that larger bores unshroud the valves and have the potential to make more power on a max effort 346.

If you read the "recipe for 500hp" and other threads that detail the hand porting work that Tony Mamo has performed on AFR 205 heads, much of the details have been covered there...

Just a guess, but I'm betting that alot of what Tony did to hand tweak the 205cc heads for Patrick's 500+ hp 346ci build, and the 403ci engine for Roy's GTO has been applied to a new CNC program that comes close to duplicating his efforts. Maybe that is not the case, but I recall quite a bit of interest in the performance potential that Tony was able to wring out of the heads.

If 95% of the potential from an AFR 205 hand ported by the port designer becomes available for CNC prices, it's a great thing for the LSx performance market.

MelScrilla

iTrader: (2)

damn looks like im going to have to start saving some major cash

The Alchemist

iTrader: (19)

Well, I admit when I'm wrong. I was just referencing the AFR website where it states that the heads require a minimum head gasket bore of 4.135". I figured that if the head gasket is required to be that big, its because of the location and size of the intake valve and would make sense that the cylinder bore needed to be that size as well.

onebadZ28

this is going to be interesting considering i'm in the market for some aftermarket heads

LARRY01Z28

iTrader: (28)

thats what im waiting on.

stumprrp

iTrader: (2)

interesting how a stage 1 LS6 head flows nearly the same (at peak) as the TFS 215 heads at like half the cost. i guess the mid lift numbers are where those high end heads shine

hammertime

iTrader: (1)

1.) Look for independant flow numbers on those stage 1 heads, or more importantly, track testing results wth a DA to even the playing field.

2.) Look at the size of the port. Volume is about all that most people will publish, but Cross Sectional Area can vary quite a bit as well. If possible, verify that the port measures out to the rated specs.

Interesting Flow Data

If you haven't read the thread from the sticky at the top of the forum, you owe it to yourself to look it over. Every vendor knows that peak flow numbers sell heads. Short of that, it becomes pretty tough for the consumer to make comparisons.

While most people in the community are honest, indepedant testing has shown that several variables can effect the actual airflow. Weak test springs, generous port volumes, happy flow benchs and skewed dyno numbers can all become great marketing devices. In the end, the results at the track are the only equalizer. Even then weather conditions and vehicle and track preparation vary.

Hi-Po

iTrader: (4)

I really want to know more about this. Ive noticed the new AFR and have been looking at TFS 215's. Buying new rockers is a added cost I dont want. Hope this gets dug into further.