Spitfire1974 » Restoration » Engine » Cylinder Head

email Dave Braun at dave@dbraun99.com (click here)

The car came with a standard 1500 218139 cylinder head. CC is 44.9cc, the inlet valve is 1.438 and the exhaust is 1.171. We are looking at a 1296 cylinder head 515573. CC is 37.4cc and the inlet is 1.303. The rocker shaft is toast. I have a theory about cylinder these cylinder heads, bigger valves don't always work better. For low end torque I'm sticking with the extra swirl I believe I'll get witht he smaller valve. Headwerks of Bloomington, MN will be doing the smoothing and seats.

Rockers both sides of cork gasket was glued down	1500 head 218139	Testing valve sealing 30 min later	1500 head rocker shaft and studs	1500 rocker shaft cotter in front
Breakdown of 1500 rocker shaft (1)	Breakdown of 1500 rocker shaft (2)	Breakdown of 1500 rocker shaft (3)	Breakdown of 1500 rocker shaft (4)	1500 shaft wear on 3, 4, 5 deep scoring (1)
Standard rocker shaft and rockers	New Rockers	compare old and new rocker shafts (1)	compare old and new rocker shafts (2)	Installing end pedastal and rocker
Building rocker assembly (1)	Building rocker assembly (2)	New rocker assembly complete (1)	New rocker assembly complete (2)	1296 head 515573 (2)
1296 head 515573 (3)	1296 head 515573 (4)	1296 head 515573 (5)	Compare 1296 head top with 1500 head (1)	Compare 1296 head top with 1500 head (2)
Compare 1296 head left with 1500 head	Compare 1296 head right with 1500 head	Rocker oil galley plug 1296 head	Headwerks of Bloomington MN (1)	Headwerks of Bloomington MN (2)
Examining 1296 head at Headwerks	Exhaust valves quite worn on 1296 head	Headwerks. (952) 884-6306. 9010 Pillsbury Ave S, Bloomington, MN 55420. New exhaust seats, blended into port. New intake and exhaust Mag/Bronze guides. Radius cut exhaust valves and seats, multi-angle intake. Clean up short side radius into seats. Mill head to 34+ cc, 2.961 inch thick	All valves are within 0,018 inch	Oring seals not much oil gets up here
Narrow waist of valve stem	Finished combustion chambers radius cut exhaust multi angle inlet (2)	Combustion chambers are 34 + cc

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