bradkazz

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Hello All Time to dig up an old one again. I recently killed my LPG powered GTS by over reving, prior to this I got it up to 400rwhp with a GT35R. Sold after fitting new engine. We never found a willing customer, so I now have a 96 R33 GTR and it's going on gas. Brad

Used Apexi Power FC with hand controller. Currently fitted to 1996 R33 GTR, factory engine with upgraded turbos. $900ono Located in Perth but willing to post interstate. Brad

Some of the post I have read indicate that the ATTESA and ABS also use a tacho signal, the factory ECU outputs a tacho signal from pin7. I assume you will need to connect the Microtech tacho out to this same wire.

From what I have read, once the idle voltage is adjusted to 0.4v the Attesa will function, but becuase the ramp rate is not exactly as expected the system will apply more front bias at a lower throttle opening. An additional circuit should not be required, but it would make the system function exactly as intended. Perhaps your issue is related to the tacho signal.

Hello I am researching the same issue for an ECU install. So Far I have; The ATTESA requires 0.4V to 3.5V TPS signal The factory ECU has an inbuilt amplifier that generates the required signal. When using an aftermarket ECU, that does not offer TPS out, the RB26 wiring loom requires modification to the wire connected to pin 56 TPS output signal. The wire at pin 56 needs to be cut off and T connected to pin 38 TPS input signal. The TPS sensor needs to be manually adjusted to provide 0.4V when idling with the throttle closed. Your Microtech should have three wires connected to the TPS Ground 5V power TPS Signal (connect to Microtech and ATTESA) I have not tested this option, but provided my research is correct, you need to connect the wire that was originally connected to pin 56 to the TPS Signal wire on the Microtech and adjust the tps until it reads 0.4V at idle with the throttle closed. I beleive the ATTESA also requires an RPM signal which is generated by the factory ECU at pin7. I intend to build a simulation amplifier and will post the design once complete

Apart from the cost there is no problem running two tanks. The triple tanks are all connected together and they only have one outlet, so unfortunately they don't help. Some may say I am ill informed about how to get the power out of a single tank, however I know exactly how to do it but the Australian Standards for LPG do not allow any modifications to high pressure components.

Unfortunately most of my time is being spent on customers cars, plus the skyline is my daily, so it's been on hold. 13.9s gets me to work. I have a new engine in my RX7 which should do 11 seconds, just finishing off the cooler piping. The only problem with 300rwkw is the tank, they have an excess flow limiter. You may need to run two tanks.

RAGE Racing is our WA Distributor, they are using our ProFIRE system. They don't have a website, have a look at www.profire.com.au, we have info of a few of their cars.

We have added a couple of pics of the RB20 powered Hilux to our website, so far its made 241rwhp at the recent Motorvation dyno comp. I have just purchased a 1993 R33 GTS, I will be fitting a toroidal tank tomorrow and will hopefully have it running on LPG within a couple of weeks. I intend to install 12 LPG injectors (staged) and 2 regulators. I have also been looking at the horsepowerinabox.com RB25 turbo upgrade kit, has anyone got any first hand experience with these? http://horsepowerinabox.com/HPIAB2/category50_2.htm

Hello All Just thought I would provide an update, we have finally put a skyline engine on LPG, a baby one at least. We have fitted our ProFIRE system to an RB20 powered hilux, the latest issue of Perth Streetcar mag has an article on it. Runs well and was easy to tune, after we replaced the iridium plugs, they are not very compatible with LPG.

It is true that LPG Liquid injection would be a very complicated system, which is why our system like all of the other current LPG injection systems is vapour injection, not liquid. The water pipes that you are talking about are actually used to heat the lpg to cause it to vaporise. The LPG is delivered to the engine via LPG injectors as a high pressure vapour. The injector flow is massive in comparison to a petrol injector.

the actual address is profire.com.au but either one will get you there

How do I answer this one..... Sprint gas, Bohemo, Appolo gas, etc all have gas injection systems but they are not aimed at the performace market. I have seen some of them and they work very well on standard cars. They do not have ignition control so the mileage would not be as good as it could be and like I said previously I don't think they will work with forced induction but it is worth asking them. I have basically just described the design brief for our system. I/We have been running lpg on many different cars for many years and have seen all of the benifits but it has never run exactly right. For example the gas research throttle body is a great idea and produces very good power but usually runs rich so emmissions and economy are not the best. A standard gas mixing ring gives good economy but at the expense of power. So thinking that it would be an easy project we set out to design a system that could do everything, 3 years, several board revisions and 15,000 lines of code has finally provided what we were after.

sorry don't know what happened with my last post I don't have any contacts over east at the moment. In the future we intend to have distributors in your area. Most gas installers should be able to setup our system - you could contact some local people and ask them to contact us, via our website. We can provide all the information they would require. Some of our competetors also have gas injection systems, but I am not sure if they can do turbos, it may be worth making a few calls.