Post your LT1/LT4 Ported heads Flow #'s
03-09-2006, 01:07 AM
#21
Originally Posted by TwoFast4Lv
the problem with doing this on a Stroker motor is it NEEDS the extra 20cc's 
It's funny how the guys who put up NHRA national records talk about having too much velocity, but the average joe thinks you can't get enough of it?
Looks like another thread to race flow benches again.
I've seen stock castings go over 280cfm in a REAL customers port not some made up numbers. I'm going to test two sets later this week, one from CNC heads in Fl and one from a semi local guy, along with some AFR and TFS heads from Lloyd, and a set of AFR's from Larry Meaux.
LT4 heads can do 300cfm without too much trouble. Seen that from Lloyd, Meaux and TEA.
Bret
03-09-2006, 02:11 AM
#22
Bare Casting 210AFR, sent out for full port
INTAKE:
.100 75
.200 146
.300 208
.400 253
.500 287
.550 301
.600 305
.650 306
.700 307
EXHAUST (no pipe):
.100 61
.200 110
.300 148
.400 183
.500 201
.550 207
.600 213
.650 216
.700 219
INTAKE:
.100 75
.200 146
.300 208
.400 253
.500 287
.550 301
.600 305
.650 306
.700 307
EXHAUST (no pipe):
.100 61
.200 110
.300 148
.400 183
.500 201
.550 207
.600 213
.650 216
.700 219
03-09-2006, 02:13 AM
#23
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What heads are those ATLJAR?? I have seen you on the boards for a while. I am going a GM847 soon like you ran in your car. I was thinking on getting even better heads after the install(or at the same time).
03-09-2006, 05:32 AM
#25
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Originally Posted by SStrokerAce
LT4 heads can do 300cfm without too much trouble. Seen that from Lloyd, Meaux and TEA.
Bret
03-09-2006, 06:20 AM
#26
.100: 74/64
.200: 147/118
.300: 203/167
.400: 249/197
.500: 269/214
.600: 284/225
.700: 287/232
Exhaust was flowed with a pipe. Also backed up on another bench, and flowed alittle higher everywhere.
.200: 147/118
.300: 203/167
.400: 249/197
.500: 269/214
.600: 284/225
.700: 287/232
Exhaust was flowed with a pipe. Also backed up on another bench, and flowed alittle higher everywhere.
03-09-2006, 12:06 PM
#28
Originally Posted by SStrokerAce
It's funny how the guys who put up NHRA national records talk about having too much velocity, but the average joe thinks you can't get enough of it?
03-09-2006, 12:59 PM
#29
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Stock LT1 castings, work done by Port Pros...
2.02 int / 1.57 exh
.100= 71.8 / 60.2
.200= 143.9 / 112.4
.300= 191.7 / 150.8
.400= 240.2 / 176.6
.500= 273.1 / 190.8
.600= 287.3 / 195.4
Paid around $1400 to have them added to the 383 short-block he was already building for me. Just waiting on my intake and water pump housing to get back from the powdercoaters to put it all together. Should make good power with 15psi and a comp xfi 280 cam.
2.02 int / 1.57 exh
.100= 71.8 / 60.2
.200= 143.9 / 112.4
.300= 191.7 / 150.8
.400= 240.2 / 176.6
.500= 273.1 / 190.8
.600= 287.3 / 195.4
Paid around $1400 to have them added to the 383 short-block he was already building for me. Just waiting on my intake and water pump housing to get back from the powdercoaters to put it all together. Should make good power with 15psi and a comp xfi 280 cam.
03-09-2006, 02:40 PM
#31
Originally Posted by SS MPSTR
Are you inferring AI is the 'average joe', or 94greencamaro? Just curious.
You might be able to get a port to work well with a LOT of velocity probing at a smaller runner size, but it's just not needed. The short turn and pushrod pinch velocities are going to be much much higher in a stroker than in a 350.
Either way... most people do not understand port velocity, even the major head companies and some of the guys who develop their ports.
Bret
Last edited by SStrokerAce; 03-10-2006 at 01:38 PM.
06-04-2007, 12:03 PM
#33
reviving......would love to see numbers (please post flow for all known lifts) from lesser known porters as well and please list who ported them and as much info on them as you know (intake cc's/valve size/casting). Would like to see numbers from those with GTP, MTI, Port Pros, RGR (speed inc), Blackstone, Eric Bradby, TEA, etc.
06-04-2007, 04:58 PM
#36
Originally Posted by 94greencamaro
I went with AI for one reason. Although AI and LE have similar flow numbers, AI achieves this while porting the head almost 20cc less than LE has to to get the same numbers. This means more velocity, since the chamber will be packed tighter, which in turn means more power. Flow numbers arent everything. AI customer service is ****** sweet too.
And here are my flow #'s to add to the thread.
.200 143/110
.300 199/141
.400 246/173
.500 274/188
.600 279/196
.650 282/200
06-04-2007, 05:31 PM
#37
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Originally Posted by blkchevyz
Keep in mind that my heads are the late model (96-97) and thinner 561 castings with 2.0/1.56 valves, and no pipe on the exhaust....
28" water, 4.0 bore
I/E
.100---- 65.9 /55.4
.200----134.4/103.1
.300--- 191.8/141.2
.400--- 232.3/163.6
.500--- 260.0/181.9
.550--- 268.6/186.8
.600--- 271.6/190.8
I don't know how it runs yet, but I will be finding out by the end of next month. Motor info is in my sig
06-04-2007, 05:49 PM
#38
Head specs
Pro-Action 235 converted to reverse flow.
Flowed on a 4.060 bore, no pipe on the ex.
In Ex
.200 145 109
.300 199 140
.400 251 177
.500 292 200
.600 312 218
.700 318 224
These numbers look a little low, the reason for that is most all head porters post flow numbers produced on a 4.125 bore fixture. These numbers are from a 4.060 fixture, After they were milled, milled ALOT he he
David
Pro-Action 235 converted to reverse flow.
Flowed on a 4.060 bore, no pipe on the ex.
In Ex
.200 145 109
.300 199 140
.400 251 177
.500 292 200
.600 312 218
.700 318 224
These numbers look a little low, the reason for that is most all head porters post flow numbers produced on a 4.125 bore fixture. These numbers are from a 4.060 fixture, After they were milled, milled ALOT he he
David
06-04-2007, 07:57 PM
#40
Staging Lane
AFR 220 bare casting that I ported many moons ago. Ferrea 2.080 / 1.600valves. If I remember right they cc'd at 214cc's
INT
.100 72
.200 131
.300 184
.400 229
.500 265
.600 300
.700 319
EXH No test tube
.100 52
.200 103
.300 148
.400 178
.500 198
.600 218
.700 229
INT heads with intake manifold and throttle body
.100 73
.200 134
.300 183
.400 222
.500 256
.600 279
.700 291
INT
.100 72
.200 131
.300 184
.400 229
.500 265
.600 300
.700 319
EXH No test tube
.100 52
.200 103
.300 148
.400 178
.500 198
.600 218
.700 229
INT heads with intake manifold and throttle body
.100 73
.200 134
.300 183
.400 222
.500 256
.600 279
.700 291