BADSS

iTrader: (7)

UPS just delivered my TEA stage 2.5 LS6 heads this evening! The flow numbers are incredible:

LIFT INTAKE EXHAUST
0.100 69.8 55.0
0.200 141.6 111.6
0.300 205.3 165.7
0.400 260.2 228.2
0.500 297.1 249.0
0.550 313.0 253.7
0.600 323.2 257.8
0.625 328.3
0.650 336.5


As everyone should know by now, yes, TEA flows the exhaust port with a pipe. Because I plan to remain NA, TEA recommended I stay with the stock LS6 sodium filled exhaust valves- they are very light and flow plenty for my application. So the exhaust flow numbers are with a stock 1.55 LS6 exhaust valve. Intake valves are 2.055.

I am hoping for 450 RWHP with the F11 cam. Compression will be 11.3:1 with .030 Cometic head gaskets. I'm just waiting for the Cometics now.

I also am going to have the LSX intake ported and port matched to my heads. Should be worth a few extra ponies.

Also, at Brian Tooley's recommendation I am ditching the Yella Terra's in favor of stock rocker arms.

Thanks to Brian Tooley, Brian Hogan, and Brent Lightfoot at TEA- they are all very knowledgeable and were really helpful in sorting out my combination.

Brian Tooley talked to me for four hours one evening That's what you call customer service!

98TAauto

iTrader: (2)

thats what sold me... when i ordered mine I was on the phone with Brent everyday.. great group of guys over there!

now get them on and lets see them on the dyno or more importantly down the track

Beast96Z

iTrader: (21)

Wait till you see the numbers from my hand finished Stage 2.5 AFR's with optional nitrous exaust port.... Brian T. if you read this, how far off am I? Should be anyday now.

pdd

iTrader: (3)

Ryan02SS

iTrader: (3)

Those are some awesome numbers especially the mid range flow numbers. Did Brian give any reason for ditching the Yella Terra's? IMO they are a quality made shaft mounted rocker that's along way above the stock rockers. I would like to hear his opinion on this subject.

SouthFL.02.SS

TEA rocks.

verbs

I'd be curious as to how they flow. I have the N20 exhaust ports myself, and you can really see the difference in flow between the n20 exhaust port and the n/a port above.

Lift Intake Exhaust
.100 72.8 58.7
.200 140.3 120.9
.300 204.8 175.5
.400 256.0 228.5
.500 294.6 263.9
.550 311.6 273.0
.600 322.5 277.8
.700 336.6

BADSS

iTrader: (7)

I was pleasantly surprised by the flow numbers myself. The intake flow numbers on my heads are actually higher than the advertised flow numbers on TEA's website for the LS6 stage 2.5 heads.

In regards to the Yella Terra's: I think the issue is weight over the tip of the valve that may cause some valvetrain instability at higher RPM's. I have had a dip in my dyno graph that cannot be explained ever since they were installed- with Isky single springs, with Crane dual springs, and with my current Patriot gold dual springs. I also replaced the lifters, but the dip is still there around 5800 RPM's, and then power drops like a rock at 6400 RPM's. The F11 cam should continue to pull past that point.

I have talked to Brian Tooley and to Alan Futral and they both suspect the Yella Terra's could be the problem. Of course, it could also be my JPR heads. Alan and Brian both have had the best luck with stock rocker arms, so I'm going to listen to the experts.

I seriously considered having TEA work a set of AFR heads for me, but I decided to stick with a proven performer in the TEA stage 2.5 LS6 heads.

IMO, the jury is still out on the AFR's, but I am sure AFR's worked by reputable porters like TEA will kick ***!

ONEBADWS6

iTrader: (22)

https://ls1tech.com/forums/dynamometer-results-comparisons/217504-tea-stg-2-5-ls6-heads-g5x4-dyno-track-times-within.html

Those heads rock!

TD's z

your .700 number is actually a .650 number

J-Rod

I'd be interested to see what the difference is in flow numbers if you bolted those heads onto a SF600 or a 1020.

TEA's bench is accurate, I don't think there is any question in that regard.

But, its the same as comparing a Mustang or a DynoDynamics to a Dynojet 248c. The numbers vary in most cases. DynoDynamics for instance is at least 10% below a 248c when you look at RWHP numbers. They just interpret the data differently.

I don't doubt the validity of the numbers that TEA provided to you at all, in other words I don't think they went out and were doing tricks on the heads to inflate your numbers or intentionally make them artificially high. I will state they are very nice numbers.

I'm just wondering what those numbers would look like on a Superflow so that you have a more apples to apples comparison to many of the other flow numbers that get posted. Most shops don't have the bench TEA has, so it makes a direct correlation impossible. About the only thing you can look at is the delta of before and after.

Anyhow, I hope you enjoy your new heads, after all that what counts...

NicD

iTrader: (7)

They are heavy. I have seen many a car with those just nose over on the high RPM end with all sorts of different springs.

BADSS

iTrader: (7)

I may have the heads independently flowed, J-Rod- if I can find the time. It would really be more out of curiosity than anything else- I think TEA's results and consistency speak for themselves. I trust them (almost) completely- but after being totally fooled by JPR, I'm not sure I totally trust anyone. No offense to TEA or anyone else intended with that comment, it's just "once bitten, twice shy," you know what I mean?

FWIW, Brian Tooley says his flowbench is more accurate than the others you mentioned. I personally know nothing about flowbenches, so I won't argue. He also says that usually his heads flow pretty close to his numbers on other benches, although there have been some cases with larger variances in numbers.

The main thing to remember is flowbenches are tools- just like dynos. The numbers alone don't mean much- a head can flow on the bench, but not make good power on the car, and vice-versa.

I'll post my dyno numbers and track times when I have them...but I don't expect to be disappointed by these heads.

BADSS

iTrader: (7)

Exactly! I can personally attest to that.

ONEBADWS6

iTrader: (22)

I had mine flowed on a SF600 the exhaust without the pipe was 227cfm the intake was 310 range but mine are an older version.

99 Black Bird T/A

iTrader: (4)

I'm happy with my TEA 2.5's.

BADSS

iTrader: (7)

You got any dyno numbers or track results yet, Blackbird?

Who does your tuning?

howiess2000

just my two cents....

flow numbers really matter in between .150 & .500 lift, thats when it really counts.

i'm sure there are exceptions to the rule, but like i said, "my two cents"

Beast96Z

iTrader: (21)

I think this is what confuses some people. The AFR's are just castings. He runs the same program through them as the LS6 2.5 or 3. So now you get the flow and the thicker decks, and they are actually a bit cheper than the LS-6's when you figure in the cost of having the seats and guides replaced in the LS-6 castings. The AFR's already come with the correct seats and bronze guides....$250 saved.

My90Iroc

iTrader: (26)

Is this the same scenario with Harland Sharps?