I just received my heads from TEA. The flow sheet provided with heads are
as follows:
Lift Int Exh
.100 67.2 53.8
.200 142.5 115.0
.300 201.1 172.3
.400 245.7 210.5
.500 268.8 232.3
.600 270.2 239.9
.700 271.4 246.5

This was with 2.00 intake and 1.60 exhaust valves.

I had these heads independently flowed at two separate locations today. Both at .28 inches with a 4.155 bore, same as TEA.

SuperFlow600 SuperFlow300
Kim Barr Lloyd Elliot (Nighttrain66)
----------------------- ------------------------------------
Lift Int Exh Lift Int Exh
.100 65.4 53.1 .100 63.2 46.0
.200 140.9 109.3 .200 131.3 100.5
.300 202.0 143.8 .300 189.3 134.2
.400 245.6 174.2 .400 232.3 155.5
.500 258.4 187.1 .500 254.4 169.4
.600 261.2 195.8 .600 255.6 178.5
.700 260.9 200.4 .700 256.4 184.7

I am not impressed with the short fall on the intake peak. Lloyds numbers appear to be a little low.

Here is my question. Lloyd feels there is more to take out the intake side and exhaust side. He could probably better describe where. I believe it is near the pushrod wall and the guide. Would you have more work done the heads. TEA seems to want me to keep them as they are or send them back for a return.

What would you do? These heads are for a nitrous stroker.

Michael

 

Honestly...I'd have Lloyd do some work on a set of stock heads. Very nice guy, and VERY reasonable on prices.

If TEA will give you your money back, return them. Those exhaust numbers are so inflated its ridiculous. They are not what was advertised, so get your money back.

Ryan

 

I know this doesnt help all that much but for a real comparison you NEED to flow atleast two sets of heads together on two different flow benches for a true comparison. This way you can tell if there is truely a difference.

I have seen posts in LT1 tech where their heads have been reflowed and have been dead on. With a CNC porting not much of a difference should be seen between heads.

If they will give you your money back and feel you can get better elsewhere go for it. But as a comparison I payed 2000.00+ for 258/217 from GTP...

 

I roared with laughter when I spied those TEA claimed exhaust side flow #'s.

No F'ing way!!!!

 

We have a lot of people locally that use TEA's heads and have good results. Its common knowledge here that Brian flows the exhaust ports with a stack, resulting in the inflated numbers. But, its not a fact that has really gotten out. As a result there are a few uninformed folks out there running single pattern cams with the TEA heads and wonder why they're a lot slower than they should be.

 

Yes thats a lesson myself, Ryan, and Cody have learned.

 

TEA seems to do good stuff. the reason the exhaust is diff is they were flowed differently.

intake is with in 10cfm, sounds ok.. considering changes between benches, maybe a diff port, etc

 

Just an update. Brian at TEA said he doubted there was anything like 10 cfm to be found in the heads. Brought them back to Lloyd Elliot (Nighttrain66) in Red Oak TX and within about 20 minutes he found a hair over 10 cfm on a intake port. I watched him do it with my own eyes. All I can say is if you want a stock set of LT1 heads ported, get a hold of Lloyd. You will not find a more upstanding person in this line of work. Dollar per horsepower you will not go wrong using Lloyd. Needless to say he will be going through the heads and getting them up to snuff.


AGAIN GO TO LLOYD FOR LT1 HEADWORK. PERIOD. DO NOT MAKE THE MISTAKE I MADE.

Michael

 

Is a 4.155" bore standard?

 

Lloyd

 

If they were both tested under the same conditions locally, I think the #'s should be closer. I'd be curious what another head would do on each local bench.

Dunno, but there's some inconsistency somewehre, whether it's the benches themselves or exact testing procedures.

It doesnt look like you got "bad" stuff or anything. The midlift #'s look okay. Everyone wants to claim their bench is low and try to make people think their stuff flows 280-300cfm.. cause hell, we can inconspicuously make benches say whatever we want. You start wondering though when these guys either have no dyno numbers, wont show you real dyno sheets, or aren't making 550hp+ on pumpgas like they should. Mayhaps it's just another one of these cases of the internet inflating numbers. I blame Al.

 

Well put,

550hp+ on pump gas with 275cfm heads is a strech on a streetable, stock bottom end 350 w/o F.A.S.T. That's well over 450rwhp, most likely that's not going to happen. 550HP+ could happen with enough cam and RPM.

Now 450-475 flywheel HP, yeah that's right in the range. Which is what you've shown with a 411rwhp pull and LT1 castings.

A BTW a healthy 383 LT1 with more head will make 550+hp easy. Hell the Engine Masters prooved that you need 290-315cfm heads to get a pump gas street (below 6500rpm) in the 570-610HP range.

On the topic though, I have a set of CNC LT4's here with stock valves that TEA did. I am going to flow them either tommorrow or Friday. I'll post what I find.

EDIT: I'm going to do all the flow work on Monday when the intake is done.

Bret
Bret

 

I have a set of the TEA heads for an LS1 and they seem to be great heads. They should be on and running by the weekend. So I'll know more this weekend. But as far as the exhaust flow being "inflated" that's not realy true. The proper way to flow an exhaust is with a tube. If you don't it will cause turbulence and the numbers will not reflect what happens when the heads are installed. You wouldn't claim that intake numbers were inflated just becuase they used a radiused inlet would you. So why say that if they use a pipe on the exhaust? It's the same thing. Flow benches are like dynos you can't really compare one to another there are too many factors that are involved in to do an A-B comparison.

 

Just an update on my TEA heads. Remember this is what TEA flowed the heads at:

Lift Int Exh
.100 67.2 53.8
.200 142.5 115.0
.300 201.1 172.3
.400 245.7 210.5
.500 268.8 232.3
.600 270.2 239.9
.700 271.4 246.5

This is what Lloyds bench flowed the same heads:

Lift Int Exh Lift Int Exh
.100 63.2 46.0
.200 131.3 100.5
.300 189.3 134.2
.400 232.3 155.5
.500 254.4 169.4
.600 255.6 178.5
.700 256.4 184.7

After reworking the portwork here are the flow number on Lloyds bench:

Lift Int Exh Lift Int Exh
.100 64.1 47.0
.200 135.7 101.1
.300 193.2 136.1
.400 239.4 159.0
.500 266.0 176.5
.600 272.5 188.2
.700 273.5 195.6

I would love to see what they would flow on TEA's bench. Needless to say I am pleased with the results.

 

I know 3-4 guys running around here that are all putting 400+ rwhp with TEA stage 1.5,2 with mild cams and headers. To be specific the one running a 224/224 cam is abour 420rwhp and the other running a 226/230 is about 440rwhp. So I would say the heads are decent, I just bought some as well, so we'll see what they do for me.

I got my flow sheet:

at .550
299I and 256E