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You may want to contact Alternative Fuel Systems in Calgary Canada. They manufacture high-flow port injectors for automotive applications (100 HP continuous flow at 5.5 bar inlet pressure) and also make an injector suitable for stationary engine applications (about 1200 HP worth of gas in...

In a previous post, thread330-142186, member rorschach referred to ASTM A 500 Grade C as "ROPS tubing": "ASTM A500 comes in three grades: ... Grade C (also known as ROPS or Roll Over Protection Systems, tubing. It is used for roll cages and cold temp structures) This material is comparatively...

A good read is "Engine Testing Theory and Practice" by Michael Plint and Anthony Martyr, ISBN 0-7680-0314-8, available through SAE. I recommend reading it before you start your installation. Richard Thomas

What do you mean by "choked flow type"? As far as I know, solenoid-type fuel injectors have a fixed open flow area and thus are affected by upstream and downstream pressures in the same way as any other restriction in a gas stream. In general, the ratio of upstream to downstream pressure...

www.afsglobal.com Large capacity injectors for LPG/CNG/H2

Keeping in mind we are talking CNG injectors, the following points should be considered: 1) Mass flow through the injector is determined by rail pressure (mostly) as long as sonic flow conditions exist at the injector metering orifice (neglecting the effects of differential pressures on...

KR1, I understand that heat treating 7075 to a T7 type temper may alleviate the tendancy for stress corrosion cracking. I don't know of the effect on the other properties though. Try contacting one of the big aluminum producers or posting in one of the metallurgy forums for an application...

Have a good look at MIL-HDBK-5 before using 7075 aluminum alloy in a critical structural application. Its mechanical properties in the T6 tempers are directional, especially with regards to stress corrosion cracking (a concern if there is any chance the part may be exposed to salty water [such...