Has anyone flowed an ETP225 head on a 3.9 bore yet?
12-21-2005, 07:12 AM
#1
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Has anyone flowed an ETP225 head on a 3.9 bore yet? Just curious 
I have only found 4.0" bore flow numbers
If not, any guesstimates what a 0.1" reduction in bore diameter does to flow numbers?
ET lists them as the following for 4"
Lift Int Exh
.100" 71 57
.200" 153 114
.300" 208 164
.400" 265 204
.500" 308 224
.550" 320 228
.600" 328 231
.650" 332 234
.700" 320 236
I have only found 4.0" bore flow numbersIf not, any guesstimates what a 0.1" reduction in bore diameter does to flow numbers?
ET lists them as the following for 4"
Lift Int Exh
.100" 71 57
.200" 153 114
.300" 208 164
.400" 265 204
.500" 308 224
.550" 320 228
.600" 328 231
.650" 332 234
.700" 320 236
12-21-2005, 08:45 AM
#2
For a comparison, here's what the AFR "small bore" 225 heads flow on a 3.900 bore:
Intake Flow (28" on a 3.900 bore)
.200.....300.....400.....500.....550.....600.....6 50
142......206.....252.....290.....304.....312.....3 17
Exhaust Flow (28" on a 3.900 bore utilizing a curved 1.875 pipe)
.200.....300.....400.....500.....550.....600.....6 50
117......170.....205.....225.....231.....236.....2 40
Intake Flow (28" on a 3.900 bore)
.200.....300.....400.....500.....550.....600.....6 50
142......206.....252.....290.....304.....312.....3 17
Exhaust Flow (28" on a 3.900 bore utilizing a curved 1.875 pipe)
.200.....300.....400.....500.....550.....600.....6 50
117......170.....205.....225.....231.....236.....2 40
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
