TEA 5.3L heads are here, flow #'s inside
08-09-2003, 11:05 AM
#61
Re: TEA 5.3L heads are here, flow #'s inside I would not get caught up in all the hurrah about flow numbers and this and that. I do think you need a DIFFERENT cam.
Either change to a reverse split or you may not be 100% happy with the cam from day one.
Either:
230 224 or 234/228 something like that
Phillip
Either change to a reverse split or you may not be 100% happy with the cam from day one.
Either:
230 224 or 234/228 something like that
Phillip
08-09-2003, 11:42 AM
#62
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Re: TEA 5.3L heads are here, flow #'s inside
Here are the flow #s from my solid roller motor:
GTP stage 2 flow numbers - 5.3l heads
These were flowed in house on a Super Flow 1020 bench. The bench is ~10-15cfm lower than GTPs bench.
I have personally flowed quite a few sets of TEAs and they were around 280cfm @ .550 on the intake and ~215cfm @.700 on the exhaust. They are excellent heads for the money.
Just because a head "A" flows more than head "B" doesn't mean "A" will make more horsepower than "B" on the dyno. I have seen this countless times on the bench. Flowbenches are excellent tools, but it's not the ultimate authority in determing how a head will do on a particular motor.
Jason
GTP stage 2 flow numbers - 5.3l heads
These were flowed in house on a Super Flow 1020 bench. The bench is ~10-15cfm lower than GTPs bench.
I have personally flowed quite a few sets of TEAs and they were around 280cfm @ .550 on the intake and ~215cfm @.700 on the exhaust. They are excellent heads for the money.
Just because a head "A" flows more than head "B" doesn't mean "A" will make more horsepower than "B" on the dyno. I have seen this countless times on the bench. Flowbenches are excellent tools, but it's not the ultimate authority in determing how a head will do on a particular motor.
Jason
Did the tea heads port stall after .550? it used to be common.They are now using a diferent valve job that doesn't port stall.I will post my numbers when I get my new heads back. I will also have them flowed here in Chattanooga for a comparison.
08-09-2003, 12:01 PM
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Re: TEA 5.3L heads are here, flow #'s inside they have changed the bottom angle and it stops the port stall that happened with the old valve job @ .580ish lift.
The credit goes to a very smart man outta texas
The credit goes to a very smart man outta texas
08-09-2003, 12:04 PM
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Re: TEA 5.3L heads are here, flow #'s inside hey 99 when you flowed with an intake in place did you have any port stall? and if you did ,did it occur about .050 higher in lift?Thats what I have seen.
08-09-2003, 09:47 PM
#68
Re: TEA 5.3L heads are here, flow #'s inside
hey 99 when you flowed with an intake in place did you have any port stall? and if you did ,did it occur about .050 higher in lift?Thats what I have seen.
08-09-2003, 09:48 PM
#69
Re: TEA 5.3L heads are here, flow #'s inside
FYI..TEA recently changed their valve job and bowl area so the port stalls @ 650-675 lift.
Phillip
Phillip
08-09-2003, 11:16 PM
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08-10-2003, 05:32 AM
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Re: TEA 5.3L heads are here, flow #'s inside I say stall is when it starts to lose flow.
when it flows the same at higher lifts you go it is at max flow. So when he says it stalled at .500 lift he is saying it reached max flow. (max flow of the intake no doubt.) But I doubt it lost cfm after .500
when it flows the same at higher lifts you go it is at max flow. So when he says it stalled at .500 lift he is saying it reached max flow. (max flow of the intake no doubt.) But I doubt it lost cfm after .500
08-10-2003, 07:57 AM
#73
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Re: TEA 5.3L heads are here, flow #'s inside Stalling is usually when extra lift of valve causes flow direction change in port or into cylinder. This change causes loss of flow,sometimes air comes unstuck from either side wall or short side turn.Air volume is reduced from this because distribution is no longer even. I learned from David Vizard that the helical vortex of air flowing into cylinder can be disrupted with more valve lift, sometimes these vortex's can collide with each other making port flow drop as a result. Next i want to say dont use silicone for sealing rocker arm boss threads because it is not designed for sealing fuel. Injector spray will dissolve silicone over time, you want to use teflon pipe thread paste or aviation sealer, type.
08-10-2003, 09:26 AM
#74
Re: TEA 5.3L heads are here, flow #'s inside
I say stall is when it starts to lose flow.
when it flows the same at higher lifts you go it is at max flow. So when he says it stalled at .500 lift he is saying it reached max flow. (max flow of the intake no doubt.) But I doubt it lost cfm after .500
when it flows the same at higher lifts you go it is at max flow. So when he says it stalled at .500 lift he is saying it reached max flow. (max flow of the intake no doubt.) But I doubt it lost cfm after .500
I've not seen others test their parts to the same degree. It's hard to really draw conclusions without have the same set of data for all the other heads out there.
08-12-2003, 11:22 PM
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Re: TEA 5.3L heads are here, flow #'s inside blackbird so I guess your saying the better a head flows through the intake the more power it will make, That makes sense. another question, what makes the port go from lets say 280 cfm at 550 down to 262 cfm at 600? I didnt really understand ls1derull's explination about vortex. I would think it should keep going or stop at the highest flow point, the drop in flow confuses me
08-13-2003, 03:33 PM
#78
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Re: TEA 5.3L heads are here, flow #'s inside The only information that I have on LS1 heads from GTP. If you want flow numbers I suggest you contact TR. They have flow numbers on GTP. As for MTI. I have some recent MTI numbers
Intake GTP LS1
235CC
Intake GTP Stage II LS1
.050 - -
.100 65.8
.150 - -
.200 135.9 166.2
.250 - -
.300 200.8 224.8
.350 - -
.400 244.1 270.7
.450 - 288.9
.500 278.3 301.3
.525 - 304.7
.550 291.5 -
.575 - -
.600 285 -
.625 - -
.650 291.4 -
.700 - -
Exhaust
.050 - -
.100 51 -
.150 - -
.200 103.8 -
.250 - -
.300 141.5 -
.350 - -
.400 176.2 -
.450 - -
.500 190.4 -
.525 - -
.550 194.1 -
.575 - -
.600 198.3 -
.625 - -
.650 202.7 -
.700 - -
Here is a set of MTI LS6 stage 2 head (2.055/1.60) setup for a 3.90" bore. These were done on an independent bench. So, there isn't any magic going on here. Judge for yourself...
Intake GTP LS1
235CC
Intake GTP Stage II LS1
.050 - -
.100 65.8
.150 - -
.200 135.9 166.2
.250 - -
.300 200.8 224.8
.350 - -
.400 244.1 270.7
.450 - 288.9
.500 278.3 301.3
.525 - 304.7
.550 291.5 -
.575 - -
.600 285 -
.625 - -
.650 291.4 -
.700 - -
Exhaust
.050 - -
.100 51 -
.150 - -
.200 103.8 -
.250 - -
.300 141.5 -
.350 - -
.400 176.2 -
.450 - -
.500 190.4 -
.525 - -
.550 194.1 -
.575 - -
.600 198.3 -
.625 - -
.650 202.7 -
.700 - -
Here is a set of MTI LS6 stage 2 head (2.055/1.60) setup for a 3.90" bore. These were done on an independent bench. So, there isn't any magic going on here. Judge for yourself...
08-13-2003, 05:13 PM
#79
Re: TEA 5.3L heads are here, flow #'s inside NE, part of making hp is air flow but other factors like combustion chamber design etc have a big effect as well. Some badly ported heads will show big numbers...someone...Vince I think had a set of FlowTechs that "looked good" on paper with 300cfm+ flow numbers, but the valve job/combustion chamber wasn't right on the FlowTech so they didn't make good power.
J-Rod, that's great info!
J-Rod, that's great info!
