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PRC 215 vs TEA stage 2 heads .

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Old 01-15-2011, 01:56 PM
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Default PRC 215 vs TEA stage 2 heads .

Hello ,

I'm new to this amazing forum and I need your experience about the best heads for the LS1 . I searched about this discussion and couldn't find anything , I don't know why there's not much feed backs for the PRC 215 ? I don't know the reason but it seems people like me are waiting to see how this heads would perform .

While comparing the PRC to other heads , I found that TEA stage 2 have almost the same flow numbers , maybe I would be wrong but to me flow numbers are the main factor to decide which heads is better and maybe other parameters like (intake size runner, valves, etc) .

Here's the data for both heads :

1- PRC 215cc :

-215cc intake runner
-84cc exhaust runner
-2.04" Intake / 1.600" Stainless Valves

flow data :

Lift Intake Flow Exhaust Flow
.100" 68 cfm 56 cfm
.200" 145 cfm 115 cfm
.300" 214 cfm 167 cfm
.400" 271 cfm 202 cfm
.500" 304 cfm 219 cfm
.600" 318 cfm 238 cfm
.650" 321 cfm 236 cfm


2- TEA LS6 Stage 2:

-225cc intake runner
- exhaust runner , not mentioned .
-2.040"intake valves and 1.575" exhaust valves

Flow data:

Intake Exhaust
0.100 67 54
0.200 139 120
0.300 219 179
0.400 271 224
0.500 308 248
0.550 315 255
0.600 320 260

I can see the real difference in exhaust flow .

So what do think guys , which's better ?

Note : the price is negligible

Thanx.
Old 01-15-2011, 02:12 PM
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This reminded me of this article on hotrod magazine, take a look at it as they test alot of heads.
http://www.hotrod.com/techarticles/e...sport_ls1.html
Old 01-15-2011, 02:13 PM
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The difference in exhaust flow is because one was flowed with an exhaust pipe and the other was not.
Old 01-15-2011, 02:40 PM
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Originally Posted by luisdm
This reminded me of this article on hotrod magazine, take a look at it as they test alot of heads.
http://www.hotrod.com/techarticles/e...sport_ls1.html

I also like to hear from others as well. That link was very informative. As much as people are quick to jump on those aftermarket castings, those TEA were giving up like less than 5-6 hp to those aftermarket heads.
Old 01-15-2011, 02:45 PM
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Originally Posted by 94dragbird
The difference in exhaust flow is because one was flowed with an exhaust pipe and the other was not.
Which method produces a higher flow number?
Old 01-15-2011, 03:01 PM
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Originally Posted by Darkman
Which method produces a higher flow number?
with a pipe
Old 01-15-2011, 03:04 PM
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Originally Posted by RJB01camaross
with a pipe
Why is that?
Old 01-15-2011, 03:10 PM
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probably helped with scavenging?
Old 01-15-2011, 03:21 PM
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Originally Posted by need4fun2469
probably helped with scavenging?
On a flow bench?
Old 01-15-2011, 03:36 PM
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Originally Posted by Darkman
On a flow bench?
LOL.

Probably has more to do with turbulence.
Old 01-15-2011, 03:55 PM
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The hotrod .com test looks like this to me. Maybe this head just performed better with the cam and intake they used over that head causing more power and tq. Not showing that maybe this head or that head needs a better matched cam to really shine. My ported l92 heads out flowed my trickflow 235 heads according to flow data. But,my trick flow heads gained more hp and tq under the curve and the same peak hp. My car simply went faster and the mph was higher at the track.
Old 01-15-2011, 04:02 PM
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You cannot compare aftermarket cast to GM cast !
Old 01-15-2011, 04:10 PM
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Originally Posted by Cold Zero
You cannot compare aftermarket cast to GM cast !
Okay I'll bite, why not?
Old 01-15-2011, 04:19 PM
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I agree gm to aftermarket should not be in the same test. My trick flow has a thicker deck and the valve angle is different to let in more air,ect.
Old 01-15-2011, 04:21 PM
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I am curious to hear this explanation too.
Old 01-15-2011, 05:21 PM
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I want to see more of these PRC 215 heads. Not too many results as they are brand new and they dont require aftermarket rockers like TFS does.
Old 01-15-2011, 05:26 PM
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If you have your head assembler, such as Total Engine Airflow, install powdered metal valve guides (instead of bronze) you can get around the need for roller rockers on Trick Flows.
Old 01-16-2011, 02:34 PM
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Originally Posted by luisdm
This reminded me of this article on hotrod magazine, take a look at it as they test alot of heads.
http://www.hotrod.com/techarticles/e...sport_ls1.html

Yeah this was one of the best test article hotrod did , sure they tested the TEA stage 2 but I think the competitors was from different level .

THX


Originally Posted by 94dragbird
The difference in exhaust flow is because one was flowed with an exhaust pipe and the other was not.
Are you sure ?

I think the pipe would restrict the flow but maybe you’re right .
Old 01-16-2011, 02:40 PM
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Originally Posted by mike c.
The hotrod .com test looks like this to me. Maybe this head just performed better with the cam and intake they used over that head causing more power and tq. Not showing that maybe this head or that head needs a better matched cam to really shine. My ported l92 heads out flowed my trickflow 235 heads according to flow data. But,my trick flow heads gained more hp and tq under the curve and the same peak hp. My car simply went faster and the mph was higher at the track.
Good point , so what do you think the reason behind this ?
Old 01-16-2011, 02:43 PM
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Originally Posted by Cold Zero
You cannot compare aftermarket cast to GM cast !
I knew someone would mention that but why not ?

They almost have the same flow .


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