Had my TEA SII 5.3L heads flowed and CC'd locally
10-06-2004, 06:24 PM
#1
Had my TEA SII 5.3L heads flowed and CC'd locally This what they flowed with a 3.905" bore and 28" of H2O on a SF600:
.100 65.1 88.8
.200 135.2 115.4
.300 201.3 159.8
.400 250.6 186.4
.450 266.4 198.3
.500 283.2 207.2
.550 297.1 216.0
.600 285.2 219.0
I think I read somewhere that the exhaust difference is due to TEA using a pipe on the exhaust port or something like that. I am not sure. The loss of flow at .600 bothers me because my cam is .598/.595 lift.
The intake ports CC'd out at 223cc, and the exhaust ports at 87cc. The intake ports are 62cc.
I plan to have the Patriot heads flowed and CC'd when they are off the car.
.100 65.1 88.8
.200 135.2 115.4
.300 201.3 159.8
.400 250.6 186.4
.450 266.4 198.3
.500 283.2 207.2
.550 297.1 216.0
.600 285.2 219.0
I think I read somewhere that the exhaust difference is due to TEA using a pipe on the exhaust port or something like that. I am not sure. The loss of flow at .600 bothers me because my cam is .598/.595 lift.
The intake ports CC'd out at 223cc, and the exhaust ports at 87cc. The intake ports are 62cc.
I plan to have the Patriot heads flowed and CC'd when they are off the car.
10-06-2004, 07:23 PM
#2
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IMO,i wouldn't worry about it too much.flow numbers will vary from bench to bench a little,and you have good numbers at the mid lift,which should give you a broad powerband.and yes,TEA flows their exhaust thru a pipe.
10-06-2004, 07:51 PM
#4
You only see your highest lift point for a fraction of a second. You spend much more time at mid to low lift, so that is where you should focus your time. The numbers look pretty good to me for a stage 2 5.3 head. What kind of Patriot head will you be flowing?
10-06-2004, 08:02 PM
#7
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I would run a .550ish cam with a slightly longer duration then you were planning, if I were you. It would be better on springs in the long run anyways, and probably net you a few more horses.
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10-06-2004, 08:02 PM
#8
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I wouldn"t worry over the flow numbers too much,I bet They"ll make really good hp numbers.The cc numbers sound high especially on the exhaust side!!I have some heads with 90 cc exhaust ports a they are HUGE!!When are you doing the 
swap??
swap??
10-06-2004, 10:04 PM
#10
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big flow numbers don't necessarily make big power.there are a lot of other factors that influence how much power a head will produce.TEA makes a good product.i'm sure you will be happy with the results.
10-06-2004, 10:11 PM
#11
are these new or old heads? those numbers arent bad and are far more indicative of true flow numbers rather then the bench war **** you often see around here. steve @ RED recently flowed a TEA head and it stalled out around .550 lift too and the exhaust was around your same number. he's flowing my head this week, and has a PP "ls6" head he's got from somebodies else motor and he's going to flow it for ***** and giggles.
10-06-2004, 10:32 PM
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Originally Posted by masterdill
I never trust TEA's flow numbers, their exhaust ports are 50+ cfm more than reality and usually 10-20 cfm on the intake port.
head porting is very complicated you can have something off a few thousandths of an inch some where and cause a port to back up that does not mean the head will not make power at all
10-07-2004, 12:34 AM
#13
Roger that JRP I got done with e mail discussion with Steve this week and he explained to me the situation with his flow results and TEA's flow results. Have you ever heard anything about Race-Prep's head porting and engine building capabilities? I asked Steve and he has never heard of them before, but he thinks they are using his blocks. The web site is race-prep.com.
10-07-2004, 01:15 PM
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Originally Posted by TD's z
why don't you drive up here and prove me wrong if you have any doubt that we can and do acheive our advertised flow numbers with every set of heads we send out the door if a head don't flow we work on the port till it does at the same time making the same changes to the other ports aswell
head porting is very complicated you can have something off a few thousandths of an inch some where and cause a port to back up that does not mean the head will not make power at all
head porting is very complicated you can have something off a few thousandths of an inch some where and cause a port to back up that does not mean the head will not make power at all
10-07-2004, 01:30 PM
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Originally Posted by masterdill
Why do you guys claim 270 cfm on the exhaust, but when you put it on a SF600 or SF1020 they only flow 215-220? Maybe mid 220's with a pipe?
TEA is one of the better porters in the LS1 community. period. thats why you find their heads on so many cars that PERFORM. i don't give a good goddamn what the heads do a flowbench as long as my car is FASTER, in the way i intended it to be. call up at talk to anyone up there, you'll see that they know what they're doin.
edit: to clear up the above comment...yes flow #'s do matter, they just aren't the end-all be-all final word. timeslips/dyno #'s are where it counts.
10-07-2004, 01:52 PM
#16
The numbers are different from what TEA advertises. Different flow bench.
It will be cool if you post the numbers of the PP heads once they come off the car.
I wouldn't worry much about the numbers. Its the dyno/track numbers taht are important. Track more so then anything else.
They defentially know their ****.
It will be cool if you post the numbers of the PP heads once they come off the car.
I wouldn't worry much about the numbers. Its the dyno/track numbers taht are important. Track more so then anything else.
They defentially know their ****.
10-07-2004, 04:24 PM
#17
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10 cfm is about how far any benches should be off from each other. If it is more than that then someone is out of calibration or do not know how to use one. There will always be the human factor but come on, no more than 10-12 cfm.
10-07-2004, 05:14 PM
#18
Originally Posted by masterdill
Why do you guys claim 270 cfm on the exhaust, but when you put it on a SF600 or SF1020 they only flow 215-220? Maybe mid 220's with a pipe?
10-07-2004, 05:16 PM
#19
Hysteria, I wish that was true. What a wonderful world it would be. In the real world, flowbenches do vary, not just in the quantity of flow, but also at what lift a head goes turbulent.
I had a set of LS6 heads recently that were smooth to .650" on my bench, and on another shops 600 too. On a third shops 600 they backed up after .600" lift. We never figured it out. We all compared what we were doing in the way of orifices, yada yada, and the problem is still unresolved.
The heads made awesome power, the car owner is satisfied as far as I know, and that's all that counts.
Before I would condemn TEA, I think I would need to see results from a couple of other benches operated by professionals to conclusively say there was a problem. A head can be smooth on one bench and not another. I've seen it.
I had a set of LS6 heads recently that were smooth to .650" on my bench, and on another shops 600 too. On a third shops 600 they backed up after .600" lift. We never figured it out. We all compared what we were doing in the way of orifices, yada yada, and the problem is still unresolved.
The heads made awesome power, the car owner is satisfied as far as I know, and that's all that counts.
Before I would condemn TEA, I think I would need to see results from a couple of other benches operated by professionals to conclusively say there was a problem. A head can be smooth on one bench and not another. I've seen it.
10-07-2004, 05:26 PM
#20
98_1LE, another thing about these LS type heads is that when you flow them, they must be mounted on the bore of the flow bench exactly perfect. A lot of guys that flow will mount a head slightly offset so that the intake valve is a little more unshrouded. On most heads, this will show a slight increase in intake flow, and a minimal decrease on the exhaust.
"But", on an LS1, unshrouding the intake valve even a little can turn a head that is smooth when perfectly centered on the bore into a turbulent head.
I don't know who flowed the head and I'm not saying he did it wrong. It's just something to consider. A lot of heads you can just throw on the bench any old way and it will stay smooth all the way through. But not an LS1. An LS1 head MUST be mounted correctly to get an accurate picture of where the head goes turbulent. Most LS1 heads do go turbulent, it's just a question of the lift where it happens.
"But", on an LS1, unshrouding the intake valve even a little can turn a head that is smooth when perfectly centered on the bore into a turbulent head.
I don't know who flowed the head and I'm not saying he did it wrong. It's just something to consider. A lot of heads you can just throw on the bench any old way and it will stay smooth all the way through. But not an LS1. An LS1 head MUST be mounted correctly to get an accurate picture of where the head goes turbulent. Most LS1 heads do go turbulent, it's just a question of the lift where it happens.
