Hi all,
Has anyone used something like this successfully? It looks like a fixed ring so I am concerned with a possible lack of vacum...

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what do u mean by lack of vacuum?

I think there has to be a certain amount of vacum for the LPG at the throttle body and that is the reason why conventional rings keep the opeing narrow, restricting air flow and creating the required vacum.
But if I am wrong that would be great coz this might work??
'

i've never seen one that design before but if that centre hole mates up to the gas inlet passage it would work the same. im not a fan of the big flat restriction where the gas inlet is though

I have not seen this before....it may work but no idea how well or if it is an improvement on a regular ring...

really if u must have have lpg on a performance EF the choice really is only GRA...
i guess that aint the cheapest option but it is proven to work...id say ud have to budget at least $2000 including some dyno tuning....your gunna need pretty much the full kit....

I guess if this ring is cheap its worth a shot....u can get GRA mixers 2ndhand on abay around the $250 mark...add $200 for convertor + fitting + brackets + line re-route + bits and pieces + tuning
starts to add up...

only other alternative is injection = $4000...

I have used one of those and took it of straight off after i lost half my power and doubled the fuel consumption u need to find an airod vairble mixer they are the shiz.