Quote Originally Posted by niky View Post

The SGI kit requires no holes to be bored in your intake manifold... it'll use your stock injectors, with a computer-controlled valve system to seamlessly switch between gas and LPG on the run. There's also a bundled ECU (which probably explains the price... most ECUs cost 20-40k pesos) that'll monitor the system and switch back to gas if anything goes wrong. The whole system uses your stock timing maps and fuel maps...

niky,

I am really curious how they are able to use your stock injectors to feed propane into your intake manifold. The stock injector only handle liquid fuel (not gas like lpg), unless they propose to inject liquid lpg through the same injector. The pressure requirements for liquid lpg would mean that the injector must handle upwards of 300 psi!

I have been researching and only GTI in Australia has developed such an injector and it has to replace your stock injectors! I suspect they will use an ordinary mixer to feed your intake manifold and use an emulator to "fool" your injectors when operating on lpg. That way no extra vapor injectors, no extra holes!

Sequential Gas Injection usually requires vapor injectors in each cylinder, its best to find out exactly what hardware you are getting, you may be paying more than you need to.

BTW, what car and engine are you installing it in?

regards,

steve