Inliners International Forums General Discussion Hi Performance Hybrid cylinder head!

The key to success here is to get the price of the head down to $1000 for a complete head.

John's idea of an escrow account is the correct way to proceed this way no one has to worry about their cash vanishing into thin air.

Issues that will need to be solved is runner and chamber volumes. For a 250 ci motor most likely the intake runner should be around 170cc (think 327 sbc) and for a 292 around 195 or 200cc (think 400 sbc). For a real high output 250 the 200cc head would most likely be fine, but to big for a mild to med. street motor.

If the chambers were sized to the 250 stock volume with enough deck material to allow milling to sub 194 volume would this satisfy everones needs?

Also personally I'd like to see bosses cast into the intake runners to allow direct fuel injector mounting along with the needed hole to hold the fuel rail in place.

To ease installation the proposed head should maintain the inline head bolt pattern and valve train geometry - comments?

Other items that would need to be agreed upon are intake manifold flange and exhaust header flange. Obviously keeping the stock exhaust flange would be best for most folks.

Intake manifolds would also need to be designed and fabricated.

Does anyone here have pattern making exeperience?