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Old 10-30-2012, 10:47 PM   #165
Scooby Specialist
Member#: 242700
Join Date: Mar 2010
Chapter/Region: Tri-State
Location: Pittsburgh, Pa
2015 Impreza Wrx




Alright, on to the heads...

As I stated previously in other posts, the setup I was previously running has been changed greatly after an intake camshaft lobe from my Kelford 220-C was ground down and made its way through my bucket, broke off the valve stem, put a small crack in the head and sent metal everywhere which was amazing to see when disassembling the longblock

I guess the worst part of this failure is that we can not clearly determine the cause of the failure but oh well and time to rebuild!!!

Installed Ferrea "Drag Racing" dual valve springs, seat locators, titanium retainers, lockers
and seals
Installed Ferrea Competition Plus 1mm+ intake & exhaust valves
Installed new valve seats
Installed/clearanced Kelford 220-D camshafts(min. clearance .0060")
Stick-welded the crack inside of the heads
Roughen up intake ports to fix very slight fuel puddling for better atomization
Super-Flow flow bench tested= 340CFM
Valve spring seat pressure= 90lbs
Valve spring open pressure= 315lbs
Net valve lift:
Intake= 11.55mm
Exhaust= 11.00mm

Coming Together Nicely!!!

Tight Clearances FTW!

Awesome Intake Port Work

New Valve Seats!

Exhaust Port-n-Polish

Crack Repaired With Stick-Weld
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Last edited by baseballdbk1; 11-01-2012 at 10:00 PM.
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