and last question if i get an LPG kit can i also get an edit that runs on lpg with one setting and ulp performance on another setting??

Thanks for the heads up! Any chance you might have a web link with some info on this vapous inj system your getting??

car runs smoother but you loose a bout %10 power

Maybe on the dynoqueen, but my mixer ring fed EB 5.0L will do EXACTLY the same lap times at Wakefield Park on LPG as it does with the ring removed & 98RON premium unleaded. Vapour Injected & with the petrol tank removed I'd expect to go faster!!

Comparing before & after conversion acceleration back to back (G-tech, WSID etc) the main 'loss' will come from the 70kg or so added weight from having a 2nd tank. The added range of dual fuel = added weight. Ditching the EFI & tank means the weight of a full tank of unleaded vs a full tank of LPG will be almost the same.

So as not to hijack the thread. First thing is have you tried it on petrol without the ring?? What was the back to back difference & at what rpm??

The ID of my mixer ring is only 43mm. It will be a limitation on the racetrack once the motor ceaces to be stock, but for now it provides more torque than I need as I can get inside wheelspin exiting DOWNHILL sweepers. My motor is (for now) a stock E-series 5.0L from the airbox to the 'Y' piece after the cats. Bear in mind this motor has peak torque at 3000rpm & peak hp at 4500rpm. Revs high enough for the LPG mixer to be a choke & the motor is wheezing from the unported HO manifold & E7TE heads already anyway.

I've done some basic experiments & my car will idle with no mixer ring at all (piped straight into the air stream before the throttle) as there is enough vacuum effect from the ISC valve. It is also driveable & has power but only if the engine is kept constantly above 3500rpm. The reason is there is a massive flat spot in between. I have figured out a way (in theory) to setup a twin mixer ring/twin throttle setup that will allow it to idle & cruise (which a 60mm won't allow) as well as supply enough air & fuel for 347ci & 6200rpm, but it will (in my case) be put on a carby manifold. I have not yet worked out how to fit external EGR (still controlled by the EECIV) cheaply.

For your AU, the only solutions I can present are:
-Upgrade to a vapour injection setup like Cooper69s. Costs $$$ & will not be dual fuel from what I understand.
OR
-Think outside the box & make a twin throttle/twin mixer primary/secondary setup on the EFI manifold. For someone with you mechanical abilities this is a realistic option.

My eb uses the stock 1DGA EECIV (1991 5.0L auto, i changed nothing when i put in the t5) and when on lpg, the fuel function is taken over by the landi renzo lamda control http://www.landi.it/eng/prodotti/scheda ... 89000.html which intercepts and turns off the petrol injectors & starts feeding the gas, reading the throttle position & the o2 sensors to keep the stoichiometric mix under all conditions, effectivley making the system 'self tuning' (as long as the ego sensor is accurate). much more effecient than a vacuum system (my v8 has always used less gas than my dads 4.1L ute, including after re-tuning).
2 'disadvantages' (compared to petrol) are no lean throttle cruise (ie. when the eeciv activates the egr & replaces some petrol with exhaust to prevent detonation whilst lean) & the ignition map is still stock to suit 91ron. runs great though, much cheaper & like i said before, same speeds & times on track no mater which fuel (even without mixer ring while burnin 98).

Thanks for the heads up! Any chance you might have a web link with some info on this vapous inj system your getting??

Check out this web site www.gas-injection.com.au/ his injectors aren't avaliable yet as he can't get financial backing in Australia but i do believe they are at the cutting edge of lpg technology