VB-

sort of is and sort of isnt another way around it... gas system now takes an injector signal and uses that. there is a mechanical adjustment to get the gas injectors flowing the same as the petrol ones (just a restrictor on the injector itself). in reality we need a more powerful computer so we can remove the restrictors and run the gas injectors to full flow (which is a shitload more than anything else on the car will flow). could wire them direct to emanage but there is no point as the emanage cant run two different size sets of injectors, so the gas is being held back to the same point the petrol is. mate wants to keep dual fuel, so ditching the petrol system and just running lpg isnt an option. another option is upgrading petrol injectors to 800's and changing the restrictor on the lpg injectors to also make them '800cc', same as the petrol injectors. he has a set available to him cheap, but then there is no point doing all that JUST to push the gas further, if he was to do it, he'd wanna push the pterol tune further too, but if we went this route, with 800cc injectors, i've already told him we'd be going e85 but we'll need another fuel pump, better clutch etc. + his catback will probly start to become a restriction at this point, and it all gets out of control real quick. dual fuel, E85+lpg is on the cards for the future though

yeah scotty, dual fuel. trying to set it up so that fuel 1 is as it is now, fuel 2 will have main load input as 3 bar map sensor, only to add fuel up top. so it iwll be working over the top of the primary fuel map. then going to run both ignition maps off 3 bar, but wiring in a relay to the 'external switch' on the emanage, using a signal from the lpg lockoff to swap timing maps between lpg and 98 when the fuel system swaps over. simple in theory but i'm a nugget of a tuner lol thanks heaps trent. worst case i'll just wire it all up and deal with it when we bring it down next ps: we both changed out minds, i decided keeping the td06 was a better idea, and tony caught onto liking the gt35r, so car now has a gt35r on it lol

Trent/anyone how do you set this c*nt up so that it switches between maps when the external switch is changed. now map 2 (for both ign and inj.) just makes the correction on top of map 1. i dont mind it doing it with fuel but need to have two different timing maps selected via the switch. the f*ck do i do? cheers, Ben

semi-stripped and caged drift-oriented interior with 3 subbies in back.... love it!!

haha sorry zebra samuri, your english is alright, may have been pissed/tired/both when i read your post, makes sense reading it now not up with the various types of LPG injection systems, but most dont have much of an 'ECU' as such, they are basically a complicated switch, with a mechanical restrictor of some sort to choke down the injector till it flows the same as your petrol injectors. sounds like the lpg tech may have left it a little rich.... if you tune the petrol though, it should improve the gas tune *assuming your system works the same way as most others*

i take it english is not your first language? i think what your asking is if you get it tuned on petrol, will the gas tune improve in the same way the petrol does? most likely yes, but on an NA skyline, you probably wont see massive gains anywhere, fuel economy may pics up somewhat though. how bad is the fuel economoy? within 30% of petrol?

^ this honestly, if you can stretch for it, you can get a UNITIG machine for about 2.2k with foot pedal etc, they are pretty much the cheapest machine you can go with AC TIG (what you need for Alu). you can get pretty much the same machine off ebay for ~$1200 i think, with a different name on it, although these have a tendancy to blow up. take not of what ISL33P said about the guarantee. mate of mine uses one of these and it works great! very good welder IMO.

another vote for northern if you want cheap off the shelf stuff *cheap meaning good price, NOT a poor quality product*

20B

leb-spec ferrari makes me angry, it only runs like 3psi lol, whats the point? that said i remember walking around the city one night and having a close up look at a 360 modena, factory welds in the intake mani were terrible!!

its really taking off in the states, and there are a few cars over here too, mostly on commodores from what i've seen, maybe one or two falcons, all things with big motors though, hasnt proved so popular with 'smaller' motors *small by US standards, which is anything under 5L* *lag* has proven to be not as big an issue as you would imagine it to be, plenty or cars coming on hard/quick/early intercooling is not a necesity, but probly worth while in this case. running low boost, with an alloy pipe thats under the car with constant cool air moving over it has proven to be effective enough to not need a cooler, but if you can, put one in anyway definately get pics and a dyno graph up

think i read a while ago from someone of the xr6t persuasian that swapping from .5 to .7 on a gt35 is worth 20 or 40 kw in the top end or someting, not a massive amount... i'd imagine spool would be effected relatively proportional to power

didnt read the amendmant paper but i heard on the radio the other day that your car wont be impounded immeadiately, you get done and then it has to go to court for a mafistrate to decide if it gets impounded or not (as not to incur any hardships on families etc) so it's not all bad... sort of

you can do it in one if your trying R-SPEC, dont mean to pry into your personal life, but what do you do for work? how much of the day do you spend driving? do you run your own business? 3 months isnt too long, it may be financially viable to get a driver of some sort. do you have an employee/employer that you work with all the time? maybe offer a financial incentive for them to take over the driving roll. or very quickly find another job that you can get to, even if its shit, just to hold you up for 3 months, then go back to/find another job in your field. i'm not going to suggest driving as its illegal, immoral and you are the work of the devil if you do it, but just out of curiosity, is your work car registered in your name? how often do you get pulled over while driving it?

petrol contamination is only a small part of what happens to your oil while your motor is running... oils lose viscosity over time, cleaning additives stop working and froth up, things like that arent just contamination. i guess heat cycling and running it through a pump constantly must take its toll in some way too. i'd suspect its the people who sell/install lpg that will tell you its a miracle fuel that prolongs service intervals etc i'm no expert so take what i say with a grain of salt

did it have a fan running constantly on the radiaoR (for the W2A system?) alot of people seem to only trigger fans, and in some cases even the pump(s) when it comes up on boost, cant figure out why?

rish as f*ck with no timing is what i've read from a very reputable tuner out of the states. he says up to 50% more fuel than from a petrol tune, and 0 or 5 degrees timing

yeah we were playing with it on the dyno the other day, trying to get lpg tune and shit sorted. i think hes keeping his setup now though, trent helped him decide to stick with it lol. i'll still ask anyway for you. had another guy lined up to buy it but pulled out at the last minute to hiflow his standards, he was paying 2750 for it, so thats where the price would be at i'll let you know if he changes his mind and wants to sell it

sitting at idle in traffic, with no real heatloading on the cooler core, and the water circulating through a radiator/fan combo shouldnt see a sagnificant temp rise

have you got the turbo and all that already? i've got a mate who's half half on selling his turbo kit atm, its on a jzz30. td06 25g with small as shit rear housing, with gate, manifold, dump pipe lines etc. made 275rwkw @19psi.

440's will be fine on petrol, they will see more power than your stock turbos can muster up. no chance on e85 though and how cheap is cheap? they can be had regularly for $150...

just lettin yall know http://www.autoblog.com/2010/10/03/breakin...n-south-africa/

not even that. e85 loves being rich, seen heaps of cars make more power going richer. most recent one that comes to mind was an R35 that kept gaining power as it was fattened up near 10:1 (on a lambda scale calibrated for petrol obviously). i *think* with E85, EGT's come into it more. its not balancing A:F ratio and hp, but EGT's sort of make it 3 dimensional if that makes sense?

i've had a play in an iRacing simulator, tracks are laser scanned so you 'feel' all the bumps and shit. pretty crazy. anyone in melb, its on westall road if you wanna have a bash, next to pitstop cafe (use that to find the address coz i dunno what the place is called)

noticed the american's do this alot too. in aus, popular target A:F ratio is 12:1, US etc is 11:1...