Good topic though. I want to see these numbers too. 
Post your LT1/LT4 Ported heads Flow #'s
Thread Starter
On The Tree
Joined: Dec 2005
Posts: 111
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Post your LT1/LT4 Ported heads Flow #'s What do your LT1 or LT4 ported heads flow, and who ported them? My Speed Inc. RGR Stage2 LT1 heads flow:
INTAKE-EXAUST cfm
200:129-108
300:183-154
400:240-163
500:253-191
550:258-193
600:269-195
INTAKE-EXAUST cfm
200:129-108
300:183-154
400:240-163
500:253-191
550:258-193
600:269-195
Originally Posted by slagger
hey 94green what set up you get on your heads?
i'm going with the 180 cc and roller
i'm going with the 180 cc and roller
I got the 190cc full port with a custom grind roller plus i added Ferrea 6000 series valve upgrades. Add a ported intake to this and that is my top end setup.
They are going to have to feed an air hungry 383.
They advertise:
200 146/115
300 202/153
400 244/172
500 268/187
550 274/190
600 275/193
Ill get a big ****** boner the day i see them arrive to my house in the mail. **** im gettin one just talkin about it.
On The Tree
Joined: Jan 2006
Posts: 161
Likes: 0
From: Leander, TX
Intake: (2.02)
.100-------61.9
.200-------89.1
.300-------173.8
.400-------220
.500-------253.6
.550-------264.3
.600-------273.9
Exhaust: (1.55)
.100-------58.3
.200-------115.3
.300-------147.1
.400-------174.00
.500-------181.8
.550-------185.5
.600-------185.9
Port Pros Heads, Ferrea Valves, $1,400, like 2 years ago
.100-------61.9
.200-------89.1
.300-------173.8
.400-------220
.500-------253.6
.550-------264.3
.600-------273.9
Exhaust: (1.55)
.100-------58.3
.200-------115.3
.300-------147.1
.400-------174.00
.500-------181.8
.550-------185.5
.600-------185.9
Port Pros Heads, Ferrea Valves, $1,400, like 2 years ago
Last edited by Cammed95Z28; Mar 5, 2006 at 11:33 AM.
GTP Stage 2 $1600
LT1 castings
2.02/1.55
185cc intake runner
Flowed by Brodix
Intake
.200=131.6/44
.300=188.4/63
.400=233.3/78
.500=262.6/87.8
.600=263.2/88
.650=256.6/85.8
.700=256.0/85.6
Exhaust
.200=109.5/34
.300=148.1/46
.400=175.5/54.5
.500=193.2/60
.600=202.8/63
.650=204.4/63.5
.700=206.1/64
LT1 castings
2.02/1.55
185cc intake runner
Flowed by Brodix
Intake
.200=131.6/44
.300=188.4/63
.400=233.3/78
.500=262.6/87.8
.600=263.2/88
.650=256.6/85.8
.700=256.0/85.6
Exhaust
.200=109.5/34
.300=148.1/46
.400=175.5/54.5
.500=193.2/60
.600=202.8/63
.650=204.4/63.5
.700=206.1/64
Last edited by Chopstix; Mar 5, 2006 at 10:05 PM. Reason: added price and intake volume
Trending Topics
Joined: Nov 2001
Posts: 10,023
Likes: 6
From: LT1 land...the "409" of the 90s!
Modified STOCK LT1 castings Before final assembly and Valve job. This set of LE-X heads went together with new undercut valves 2.055/1.57 and had an Intake runner volume of 210cc. Lloyd figured they would pick up another 5+ after the VJ but I did not have a Local bench to test them
.100 63
.200 125/109
.300 179/148
.400 232/173
.500 265/189
.550 274/192
.600 283/196
.650 285/201
.700 287
They make very clean power to 7,000 on a 380CI.
Then again Flow numbers really do not mean much. It is more about port shape and volume
Lets face it there is almost NO way to flow a head at the speed an Engine sucks air through
.100 63
.200 125/109
.300 179/148
.400 232/173
.500 265/189
.550 274/192
.600 283/196
.650 285/201
.700 287
They make very clean power to 7,000 on a 380CI.
Then again Flow numbers really do not mean much. It is more about port shape and volume
Lets face it there is almost NO way to flow a head at the speed an Engine sucks air through Last edited by TwoFast4Lv; Mar 9, 2006 at 09:40 PM.
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great idea for a thread i needed this, when u guys post your #'s can u make sure to tell where and who did them cause i want to get my heads done and im trying to figure out the best place to go, so far the ones i like the best are from MR. Elliot. thanks
Originally Posted by ls1charged
great idea for a thread i needed this, when u guys post your #'s can u make sure to tell where and who did them cause i want to get my heads done and im trying to figure out the best place to go, so far the ones i like the best are from MR. Elliot. thanks
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.
Joined: Nov 2001
Posts: 10,023
Likes: 6
From: LT1 land...the "409" of the 90s!
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.
the problem with doing this on a Stroker motor is it NEEDS the extra 20cc's
LIFT: INTAKE: EXHAUST: PERCENT:
.200 138 115 83.3
.300 182 151 82.9
.400 224 172 76.7
.500 255 186 73.0
.550 264 195 73.8
.600 270 199 73.7
Work done at Airflow Performance Engineering
.200 138 115 83.3
.300 182 151 82.9
.400 224 172 76.7
.500 255 186 73.0
.550 264 195 73.8
.600 270 199 73.7
Work done at Airflow Performance Engineering
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