Anyone have flo #'s from the LS6 heads
12-09-2006, 08:09 AM
#1
Anyone have flo #'s from the LS6 heads I would like to see some flo #'s from 243 or other heads would be fine. It can ported or not. Just want to compare mine with them. Trying to decide if the one I have is decent enough to keep. Here are my #'s
050 36 37.5
.100 66.6 67.5
.150 100.7 102.4
.200 137.6 139.9
.250 169.7 176.2
.300 194.5 204.0
.350 217.1 229.7
.400 231.2 251.6
.450 234.6 268.7
.500 230.2 280.4
.550 234.1 291.3
.600 238.1 290.0
050 36 37.5
.100 66.6 67.5
.150 100.7 102.4
.200 137.6 139.9
.250 169.7 176.2
.300 194.5 204.0
.350 217.1 229.7
.400 231.2 251.6
.450 234.6 268.7
.500 230.2 280.4
.550 234.1 291.3
.600 238.1 290.0
12-09-2006, 09:07 AM
#2
Originally Posted by 00 Freak
I would like to see some flo #'s from 243 or other heads would be fine. It can ported or not. Just want to compare mine with them. Trying to decide if the one I have is decent enough to keep. Here are my #'s
050 36 37.5
.100 66.6 67.5
.150 100.7 102.4
.200 137.6 139.9
.250 169.7 176.2
.300 194.5 204.0
.350 217.1 229.7
.400 231.2 251.6
.450 234.6 268.7
.500 230.2 280.4
.550 234.1 291.3
.600 238.1 290.0
050 36 37.5
.100 66.6 67.5
.150 100.7 102.4
.200 137.6 139.9
.250 169.7 176.2
.300 194.5 204.0
.350 217.1 229.7
.400 231.2 251.6
.450 234.6 268.7
.500 230.2 280.4
.550 234.1 291.3
.600 238.1 290.0
Actually, those are pretty solid numbers, looks good in the midrange too. What brand heads?
12-09-2006, 09:15 AM
#5
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Heads are doing the job Joe! Until you go with a larger cam I don't know if there would be enough gain currently to jusitify swapping heads. But a killer set of heads and a big camshaft you it is bound to pick up power! 
12-09-2006, 12:14 PM
#6
Originally Posted by John02SS
Heads are doing the job Joe! Until you go with a larger cam I don't know if there would be enough gain currently to jusitify swapping heads. But a killer set of heads and a big camshaft you it is bound to pick up power!
12-09-2006, 12:38 PM
#7
You may want to have the heads verified independently....(or use a different local shop).
The exhaust flow in the lower lifts (especially at .200) is basically impossible with a 1.600 valve making all the other numbers "suspect" as well....even though most of them are attainable. A "crushing" number thru a 1.600 diameter exhaust valve at .200 lift would be in the low to mid 120's and that is extremely difficult to achieve. And so no one calls BS on that stating it is my "opinion", here is all the data compiled over a buttload of different heads that I copied and pasted from my big "flowthread".
These numbers represent some of the BETTER flowing heads of everything I have tested in Gen III over the last couple of years. This list would be twice as long if I had included all the heads I have tested.
----------------------------------------------------------------
EXHAUST FLOW w/ 1.875 pipe (curved to simulate header)
Head .Exhaust Valvelift ..Runner
...200 .300 .400 .500 .600............Volume
A .113 .150 .180 .208 .230 .84 ccs
B .107 .147 .196 .218 .228 .85 ccs
C .107 .153 .184 .205 .217 .82 ccs
D .112 .165 .195 .215 .228 .86 ccs
E .111 .156 .202 .235 .246 ... 88 ccs
F .126 .170 .204 .226 .236 .85 ccs
G 117 .164 .201 .229 .242 87 ccs
H 113 .156 .189 .221 .231 85 ccs
I .114 .145 .179 .211 .237 87 ccs
J ..97 .133 .166 .193 .213 89 ccs Very weak for size
K .117 157 .194 .218 .228 83 ccs
L .114 .155 .214 .238 .252 ..90 ccs Big, but good #s
M 120 .177 .219 .240 .251 ..87 ccs .....good #s
N .105 .144 .177 .208 .222 ..89 ccs Very weak for size
"O"....115...166...202...228...241............ .88 cc's
"P"....116...163....211...236...241........... .84 cc's
"Q"....109...156....208...224...227........... .89 cc's.....Weak for it's size
"R"....113....156...195...227...241........... .91 cc's......(BIG!)
"S"....108....146...188...226...235........... .84 cc's....Soft low/midlift #'s
"T"....120....171...200...217...224........... .84 cc's...1.570 vlv, good low#'s
"U"....111....147...189...209...224........... .84 cc's
"V"....111....144...168...186...194........... .86 cc's....VERY weak Exh #'s
"W"...126....177...215...230...241............ 82 cc's.....Good #'s
"X"....115....150...177...194...208........... .89 cc's....Very weak for size
"Y"....119....160...182...195...200............83. 5 cc's..Small port/Very soft #s
"Z"....117....170...215...241...253........... .95 cc's.....BIG port / strong #'s
"a"....114....153...193...220...233........... .90 cc's.....BIG port / avg. #'s
"b"....120....176...205...221...230........... .XX cc's.....Needs MORE!
"c"....118....164...207...232...245........... .96 cc's.....Good numbers / BIG
"d"....110....174...213...231...240........... .84 cc's.....Good #'s
AVG...113 .157 .194 .219 .230 .86 ccs
AirFlow Research #s
205 .118 .171 .206 .226 .240 ..84 ccs
225 .120 .180 .220 .241 .250 ..85 ccs
------------------------------------------------------------------
Good luck...
Tony
The exhaust flow in the lower lifts (especially at .200) is basically impossible with a 1.600 valve making all the other numbers "suspect" as well....even though most of them are attainable. A "crushing" number thru a 1.600 diameter exhaust valve at .200 lift would be in the low to mid 120's and that is extremely difficult to achieve. And so no one calls BS on that stating it is my "opinion", here is all the data compiled over a buttload of different heads that I copied and pasted from my big "flowthread".
These numbers represent some of the BETTER flowing heads of everything I have tested in Gen III over the last couple of years. This list would be twice as long if I had included all the heads I have tested.
----------------------------------------------------------------
EXHAUST FLOW w/ 1.875 pipe (curved to simulate header)
Head .Exhaust Valvelift ..Runner
...200 .300 .400 .500 .600............Volume
A .113 .150 .180 .208 .230 .84 ccs
B .107 .147 .196 .218 .228 .85 ccs
C .107 .153 .184 .205 .217 .82 ccs
D .112 .165 .195 .215 .228 .86 ccs
E .111 .156 .202 .235 .246 ... 88 ccs
F .126 .170 .204 .226 .236 .85 ccs
G 117 .164 .201 .229 .242 87 ccs
H 113 .156 .189 .221 .231 85 ccs
I .114 .145 .179 .211 .237 87 ccs
J ..97 .133 .166 .193 .213 89 ccs Very weak for size
K .117 157 .194 .218 .228 83 ccs
L .114 .155 .214 .238 .252 ..90 ccs Big, but good #s
M 120 .177 .219 .240 .251 ..87 ccs .....good #s
N .105 .144 .177 .208 .222 ..89 ccs Very weak for size
"O"....115...166...202...228...241............ .88 cc's
"P"....116...163....211...236...241........... .84 cc's
"Q"....109...156....208...224...227........... .89 cc's.....Weak for it's size
"R"....113....156...195...227...241........... .91 cc's......(BIG!)
"S"....108....146...188...226...235........... .84 cc's....Soft low/midlift #'s
"T"....120....171...200...217...224........... .84 cc's...1.570 vlv, good low#'s
"U"....111....147...189...209...224........... .84 cc's
"V"....111....144...168...186...194........... .86 cc's....VERY weak Exh #'s
"W"...126....177...215...230...241............ 82 cc's.....Good #'s
"X"....115....150...177...194...208........... .89 cc's....Very weak for size
"Y"....119....160...182...195...200............83. 5 cc's..Small port/Very soft #s
"Z"....117....170...215...241...253........... .95 cc's.....BIG port / strong #'s
"a"....114....153...193...220...233........... .90 cc's.....BIG port / avg. #'s
"b"....120....176...205...221...230........... .XX cc's.....Needs MORE!
"c"....118....164...207...232...245........... .96 cc's.....Good numbers / BIG
"d"....110....174...213...231...240........... .84 cc's.....Good #'s
AVG...113 .157 .194 .219 .230 .86 ccs
AirFlow Research #s
205 .118 .171 .206 .226 .240 ..84 ccs
225 .120 .180 .220 .241 .250 ..85 ccs
------------------------------------------------------------------
Good luck...
Tony
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12-09-2006, 01:14 PM
#8
here's a set of ported LS6 heads I got from a vendor (PP):
dura - intake - exhaust
.100 -- 71.4 -- 59.1
.200 - 146.1 - 118.1
.300 - 212.5 - 159.7
.400 - 250.3 - 190.9
.500 - 280.7 - 206.7
.550 - 291.2 - 214.2
.600 - 299.8 - 219.2
I am not 100% sure on the port volumes.
dura - intake - exhaust
.100 -- 71.4 -- 59.1
.200 - 146.1 - 118.1
.300 - 212.5 - 159.7
.400 - 250.3 - 190.9
.500 - 280.7 - 206.7
.550 - 291.2 - 214.2
.600 - 299.8 - 219.2
I am not 100% sure on the port volumes.