Head R16 race head kit E22 lay out bigger valve Z40 cam profile

This is a new proto type head with over size valves 25mm inlet  22mm Exhaust

Deeper combustion to deal with over size valves and you have the option for higher comp pistons.

Very nice castings.

We have stock of 20 limited heads same lay out externally as E22

Whats included:

• Cast head unpainted
• Standard cam 7.00mm lift
• Cam sprocket 28 teeth 2 bolt
• Cam bearings (2 bearings)
• Cam sprocket bolts (2 bolts)
• Inlet valve 25mm
• Exhaust valve 22mm
• Valve guides (2 guides)
• Valve seals (2 seals)
• Collets (4 collets)
• Valve spring (dual type) (2 springs) 40 psi race
• Top cap (retains collects) (2 caps)
• Rockers (2 rockers)
• Rocker shafts (2 shafts)

This head is all assembled and ready to fit with the valve gaps set but we reccomend you check the gaps after installation.

Important

Piston to valve clearance should be checked at 12 degrees before and after TDC, minimum 2mm is required to be safe.

We do a 52mm matched piston to head see link below

PISTON

This works well with 47mm to 52mm diameter cylinders. Ideal for C90 conversions upgrading the existing head to include a bearing type camshaft for better performance, tuning and less drag.

Technical data:
Exhaust gap:    0.12mm
Inlet gap:          0.10mm
Head torque:     10ft/lbs

Recheck the head torque when the engine has cooled down from its first run.
Check gaps every 350-500 miles or every 5-7 hours of Race use.