Grecian White/Apache Red 225

[Craig Allardyce]

Sonic injection are doing a run of Su manifolds to suit the 12 port head. No one else has ever made them. Keep your carb size to a minimum. If they are too large your mixture spread will be uncontrollable.

[Errol62]

Yes, that is the source I was referring to. 1 3/4” it is and thanks for the advice.


FB ute fixer upper, EK van on rotisserie

[Craig Allardyce]

Started finishing off the set up work for the dyno. Getting close to annoying the neighbors.

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[Blacky]

I hope you are going to video it for our listening pleasure .......

[Craig Allardyce]

This dyno unit has been a drama. It's had to be drained and pulled out for repairs to leaking fittings that are welded in. Contending with 500 litres of oil is a pain, especially hand pumping.
All welds were ground back, cleaned, pressure tested, re welded, pressure tested again, and final sealed with loctite Wick In. The leaks were mostly due to porosity in the welds.
After reassembling the unit and refitting the engine, tuning runs started in ernest. Light load ignition mapping was done. After getting stuck into full load testing the dyno let go. I saw around 2500psi at around 2000 to 2500 rpm. The split flange fitting on the pump outlet failed. The oring flange was brazed to the pump outlet pipe. This pipe sees full pressure between the pump and relief valve. Luckily it's inside the dyno reservoir. Pressure readings so far indicate good HP for around 1/2 throttle. They equate to about 109 hp at 4200 rpm so far. I'm not expecting anything over 120 hp realistically.

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