ratter

I'm hopeing Karhma takes out Rick Kelly

Some are quick turds

Just go home

At this point of time it appears the gas Injectors manufactured for Icom will not be able to match the flow of seimens 60 lb injectors which are the most common replacement injector fitted to the turbo 6. The boys at ALPGW have tried drilling injectors to increase flow rates, but drilling them actually makes them flow less. Icom can not believe we have street cars running around using this size injectors and making the power we do. They are sure they can match the flow of the 42 lb'ers as apparantly they beleive this is what some of the Roush trucks use in the states which Icom supply liquid kits for. Any body with a modded turbo contemplating fitting liquid LPG Injection should consider using Bosch 42 lb injectors. These injectors as capable of flowing enough fuel for approx 350 rwkw and normally have better idle control, but do come at a dearer price

Beat me to it

What your thinking is true in theory, but you need to keep things as cool as possible to keep the power up and consistant. Although it could be tuned out to a certain extent, your air intake temp scalers are going to be pulling heaps of timing advance out. Yes the combustion temps will be lower because of the cooler intake charge, but this is taking place at the cylinder head port and not from the where the intake temps are measure from, so the ECU will think the air charge is still hot or hotter than normal. Basically the cooler the air intake charge is, the cooler the eventual combustion charge will be

ouch!

Your welcome I guess you could always use the gas for a BBQ and cook some snags for the punters at the track

Cheer up mate it's not too bad! You are in good hands with the gas problems and it will get sorted out for you in good time. For anyone interested, worms car was originally stock when he booked in for the conversion, between booking it in and actually getting it done, he went from stock to 335 rwkw which included new injectors. The problem he now has is the gas injectors are flow matched to the petrol injectors, so they don't need a seperate ecu to control their duty cycle. Using the seimens 60 lb'ers and having the injector slopes adjusted correctly for petrol, they are only in the vicinty of 70 % duty cycle to get the correct fuel flow, now this injector duty cycle is what the gas injector also uses, and these injectors at this stage, even with the biggest calibrator drilled out, will not flow enough gas at 70 % duty cycle to support this power level. If worm used 42 lb injectors and if they made power to this level, the duty cycle would be close to the 100 % figure, so then the gas injector would also get 100% duty cycle there is a chance that it would flow enough gas to support this power. ALPGW have ordered the largest gas injector available from Italy and are prepared to try these when they arrive and in the meantime they are looking at possibly drilling the gas injectors out to increase the flow capabilities which again would be finally controlled by the correct size calibrator. If this all fails,there is the possibility of having duel gas injectors which would require a bit more hardware. The next problem may be gas supply to the injectors, they beleive the intank Walbro pump will be adequate, but if not, they can fit a 2nd intank pump to keep up the demand. This technology although new to Australia has been fitted to hundreds of thousands of cars in Europe and America for quite a few years, but the Australian range of cars is being left to ALPGW to develop. They were not planning on doing any modified cars at this point of time, but as worms car has changed, so has their time frame.

To overcome the problems you are experiencing, so conversions will switch back to petrol under boost, that may be an option for you or the only other choices are a different vapour injection kit or rip the whole lot out and put it on liquid, but that would be a very costlt exercise coinsidereing what you have allready spent.

Unlike vapour injection lpg, the liquid injection system does not use an ecu to control injector flow rates to get the correct air fuel ratio for the gas. The liquid system has to have the flow of the gas injectors matched to the existing injectors. In your case, you have to have both ecu's tuned.

There will not be any drama's from the ALPGW, they have some of the best LPG people in aust on their payroll, just got to get them fired up on my car.

Yeah that's fine, but the car will not be able to be started for a while though. But I need to pin the guys down about a few issues anyway, at least this way they will have no escape

It's not actually an ECU, it's an ICU. does not have any control on the injector flow etc etc, it only controls the switch over and the priming of the gas system.

How about some interior pics ?? the 2 cars together last night looked cruising round together

Thanks mate.

How was the fit up of the kit Danny, I'm assuming being Harrops, it would be fairly straight forward and things would fit precisely. Did they allow for the underdrive pulley when supplying it for a certain boost level or is it get and and see what it does? Should be an interesting car ride when finished, keep us informed of your progress

Thev'e been racing like that for the lst 4 or 5 race meetings due to safety concerns after Scott Kalitta was killed

Depends on how wide they are. most manufacturers have the tyre and rim info on their websites. Don't forget that the taller tyre is going to affect your gearing,

You might have to get a set of stocky brakes put back on to run the slicks and front runners, could be another tength or 2 just in that. You will have to run crossply front runners if you run the slicks on the rear.

Congratulations Danny, well done Yes slicks can sometimes help even though you have no wheel spin, because they are a lighter tyre, so there is less rotational mass, but too big can also loose some mile per hour from extra drag again conratulations, you're hard work is paying off

and the weight difference

the Boss 290 does not use knock sensors, so it will gain no performance by using 98 octane fuel, just possibly better mileage. the BA XR6T is tuned to run on 92 octane fuel but recommend 95 octane for better performance. Pretty fair comparison of stock cars. this was not posted to start the V8 Vs 6 war, it was to show some facts, which seem be lacking sometimes in these threads

Although not an XR8, here's my car when it was stock against the wifes when it was stock XR6 T

is that on gas? too much of a stretch on petrol for the mods you have, but we'll find out in a few weeks