Porting question on exhaust bowl - pic attached
I disassembled a spare head today and was thinking of trying my hand in lightly porting a set.
The intake valve seat looks to be pretty well blended into the intake bowl in stock form.
The exhaust valve seat, not so much.. Is this a casting flaw of this particular head, or is this pretty typical? (see picture - seems the exhaust valve seat is smaller than the bowl.)
Obviously I can't just take the dremel/porting bit to the valve seat.
Is this something that a machine shop can taper in when doing a performance multi angle valve job? or is the only way to correct this by going with larger valves and seats?
1994 Thunderbird SC Auto #2 - 45k original miles.
1994 Thunderbird SC Auto #1 - Police package heads/96 N/A motor test mule. SOLD
1992 Thunderbird SC 5 speed. Mostly stock now, former 345.5 rwhp/402.8 rwtq monster. - SOLD after 12 years of ownership
2000 Grand Prix GTP -Turbo conversion, billet precision 5858 CEA turbo .63 T3 hotside. Stock supercharged longblock with N/A top end, numbers coming soon.
|Display Modes||Rate This Thread|
|Thread||Thread Starter||Forum||Replies||Last Post|
|Exhaust question||ORION||Super Coupe Club of Ontario||14||09-05-2010 05:07 PM|
|header porting question||scxr7||Technical Forum||12||05-26-2010 06:40 PM|
|exhaust question||white90sc5spd||Technical Forum||4||10-27-2009 02:49 PM|
|Need a pic of Exhaust||fastsc92||Non Technical Forum||9||02-02-2005 10:10 AM|
|another exhaust question (I'm sorry)||moore89||Technical Forum||6||11-05-2004 06:40 PM|