BBC 3946074 OpenChamber RoundPortExhaust Flow Numbers

[maxracesoftware]

BBC 3946074 OpenChamber RoundPortExhaust Flow Numbers

2.250/1.880 Valves 3/8ths Stems
.... kept the original "As Run" Valves , they were in very good shape !

Flow Numbers should be Posted by Thursday or Wednesday nite

Info :

these Heads had damage in Chambers and Decks
and i managed to redo the Chambers so you cannot tell.

The Decks on 1 Head will be perfect ,
the other Head is more damaged and it will have some 'dings' left
but luckily the dings are not where Headgasket fire-ring-seal is located .

I've milled the Decks -0.008" off ,
can't really mill the Decks more than -0.008" to get rid of all the dings ,
the top of Intake Seat angle is already at the Deck surface with just -0.008" milled off so far
and it would probably take another +0.030" mill to completely remove all the dings
but then i would need to sink the Valve Job on all 8 Intake Seats

"As Run" Pics :

BBC_3946074_casting_number.jpg

BBC_3946074_as_run_best_Chamber.jpg

BBC_3946074_as_run.jpg

 

[maxracesoftware]

BBC_3946074_Chamber_after_Porting_1.jpg

ExhPort1_1024x768.jpg

IntakePorts1_1024x768.jpg

IntakePorts2_1024x768.jpg

 

[maxracesoftware]

ValveDepths_and_new_Cylinder_Numbering.jpg

ValvesLapped1_1024x768.jpg

VerticalMillIntPorts_1024x768.jpg

VerticalMillValveJob1_1024x768.jpg

WintersSnowFlakeLogo1024x768.jpg

 

[maxracesoftware]

Cylinder # 3 Bad Port Direction 4.500 Bore Fixture No Exh Flow Pipe

will Flow test the Cylinder# 1 GPD later tonite + Post Flow Numbers
will also Flow test Exhaust Port with a Pipe to compare

and will re-Flow Test both Cyl#1 and Cyl#3 Intake and Exhaust Ports on a 4.280" Bore Fixture
just to compare 4.500" -VS- 4.280"
 

BBC_3946074_OpenChamberOvalExhPorts_after_new_VJ_and_Porting_BPD.jpg

BBC_3946074_Cyl3_BPD_2.jpg

 

[Super_Stock]

Jeebus, it looks like the Hulk took a dump on your inlet port !!LOL

[maxracesoftware]

comparing a 4.280" Bore Flowbench Fixture -vs- 4.500" Bore Flowbench Fixture
also comparing without an Exhaust Flow Pipe -vs- with an Exhaust Flow Pipe

BBC_3946074_OpenChamberOvalExhPorts_after_new_VJ_Porting_GPD_4280.jpg

BBC_3946074_OpenChamberOvalExhPorts_after_new_VJ_and_Porting_GPD.jpg

BBC_3946074_OpenChamberOvalExhPorts_after_new_VJ_Porting_BPD_4280.jpg

BBC_3946074_OpenChamberOvalExhPorts_after_new_VJ_and_Porting_BPD.jpg