Jump to content
SAU Community

Recommended Posts

Thought I'd ask in here because this is one thing that PCLink help files dont really give to much info on

Virtual Auxiliary Outputs

I can't get my head around these, Just trying to bring check engine light on under certain conditions (Temps etc) but from what I can find, the Aux 7 channel needs to be turned to a GP output. I'll copy and paste the advice from the link Forum here to save me explaining it:

1) In ECU settings set Virtual Aux 1 (or whichever virtual aux you wish to use) to CE light
2) In ECU settings set Aux 1 (or whichever aux your CE is connected to) to GP Output
3) Set Switch logic in Aux 1 to 'Cond 1 OR 2'
4) Set SW Cond 1 to Aux Virtual Value 1 = ON
5) Set Aux Virtual Value 1 = ON to 1 (or whichever virtual aux number you decided to use)
6) Set SW Cond 2 to Knock > Value1
7) Set Knock > Value1 to whatever minimum knock level you want the check engine light to come on at.

So is this basically using the Aux 7 output to do what you want (In this case warn of knock) and switch condition 1 is just a roundabout way of setting AUX 7 as a Virtual CEL (which it actually is anyway)

So bascially, its like having Aux 7 setup as a CEL as normal (through SW condition 1 (Virtual AUX set as CEL)) but with an additional 1 or 2 options to turn the CEL on (SW condition 2 + 3)

Have I got this right? Or am I way off.... lol

  • 3 months later...

Yep pyrometer not a bad idea .

Changed to straight United E85 at the bottom of the last fuel price cycle because the next tune will be on this fuel . I paid 1.30.9L and at the same time 7Eleven P98 went up to 179.9L - screw that .

When I change fuels I drive it till it starts stumbling and throw 10L of the new whatever in , and do again to get the residual down to SFA . Then fill to the top .

In the 10L stages I tune for the new brew which starts with the master fuel trim - from -12 to +5 in this case . My car was originally tuned on E70 nearly two years ago so master set a 0 isn't too far from what E85 is . It just needed a fiddle with accel settings and cold start stuff .

I have a feeling that the consumption is going to be better than I thought it would be possibly because my tuning is better than it used to be - or I stumbled upon better settings .

I don't often make changes to my timing table but the corrections get moved around a little .

My current challenge is to get up around 375 out of a tank of E85 because that's three quarters of my best efforts on E42 - 500+ km .

Tuning with E85 is a pleasure because its such a forgiving fuel , it can be a fair way out and still run with a few hick ups .

To be fair my SF740s cope better on E85 because the low down pulse widths are wider and that helps keep things a bit more accurate .Once the EV14s go in it should get better again and with enough pump the target 300 wheel wasps should be easy to achieve .

I'm lucky that I can buy E85 close to work and stash a bit so I don't run out . I would like to see more servos in southern Sydney selling E85 because my next closest is Minto .

Cheers A .

The new Vipec plugin for 350z has just been released, I may be heading this way in the future with some serious modifications to the engine loom on the VQ25det... Some impressive features on this.

post-63525-0-66051500-1405466282_thumb.jpg

We need Guilt Toy back in Oz !

Cheers A .

yeah i am back mate... just been struggling with some health issues... good news is that i have got my own shop and dyno now, just as a hobby shop to help out my friends and people who need a facility that they can come down and have a play with their cars without the angry dyno shop's breathing down their throats counting the seconds for the dyno hire / tune time.

I plan to open a proper high performance shop once i recovery properly.

send me a PM if you want to come up and have some Guilt-Toy loving.

you should keep tabs on my facebook, ive been back since october last year.

www.facebook.com/tunedbyanthony

send me a PM if you need a tune guys.

post-1240-0-44995500-1405483541_thumb.jpg

Wow that sounds really good of you ^^

Hope people appreciate that gesture. I know I'd be happy if someone local to me was willing to show some freedom with their dyno.

Happy to see people still doing it for the love :) hope you get back up 100% soon

The new Vipec plugin for 350z has just been released, I may be heading this way in the future with some serious modifications to the engine loom on the VQ25det... Some impressive features on this.

yeah we manually wired in a Vipec V88 into a 2004 model 350z, i setup the ethrottle and the vvt.

it worked great! a plugin would be even easier.

Injector Dynamics short EV14 850s . They are intended to be an alternative for later Chev alloy V8s amongst other things . I wanted something in between 740 and 1000 and since Anthony ran his 740 side feeds out at I think 360 RWKW on his RB30 I figured 850s should be fine .

Anthony it would be great to get up to Newie and talk tuning , I'm interested to know if it's still possible to get an RB2530 past the emissions test to make it legal and insurable .

I don't do social networking like facebook or twitter but other members of my family do . I have a bit of time ATM if your health is up to a run on the rollers .

Will PM soon cheers Adrian .

I started using it about a week ago in small amounts to get the old 50 50 mix out . When filled the first half tank only got me 170 kays but that included a bit of road tuning .

Have two dramas ATM , the Tech Edge is playing up and I'm not sure if its the box the probe or a power supply issue . Taking the box and probe down to them next week and if the box tests ok I'll get another LSU 4.9 probe and they can calibrate the box for it .

Stone cold starting is difficult ATM but once it fires it seems ok . I've imported the original tunes warm up map after mucking around with mine and It'll get another cold start this evening .

I probably need to get one of my Maxima alternators in so there's a bit higher output to cover everything . The original Mitsubishi has 140+ on it and is probably tired .

I was going to see where you were up to next week if the TE gear checks out ok , a plug change would be good too .

Cheers A .

It winds over ok but it takes a little longer to fire than I'd like . I don't remember it being like this on E70 .

It may need a bit more cold cranking timing to light up a slower burning fuel like 85% ethanol .

A .

Found a couple of typo silly mistakes in crank enrichment and time out going back a couple of revisions so fixing this should be straightforward .

Basically not enough crank enrichment for too long , decimal point one step wrong way on timeout .

A .

I use a neat little feature called "add dwell on crank" it aids with starting as the voltage drops however if your injector dwell tables are correct vs. Voltage then you would not need to use that feature at all

  • 2 months later...

Hey guys,

Is there a good way to take my base map in Datalogit and dump it into the Vipec Fuel Table? I don't understand how the fuel calculation in Vipec works.

Thanks

Off the top of my head, loosely - some algebra (ignoring any extra trims)

m = Master fuel (ms)

p = Pressure (MGP in kPa)

a = Target AFR

t = Fuel table value

i = Injector pulsewidth

If Open Loop AFR is off...

i = m x ((t/100) x ((p+100)/100))

If Open Loop AFR is on...

i = m x ((t/100) x ((p+100)/100)) x (14.7/a)

I think that's more or less right, just kinda brain spewed but should give the general idea.

Anyone here played around with closed loop boost control on Vipec?

Mine has always been set to open loop but I'm finding that when running higher boost (2bar) the boost holds well in higher gears but in 1st and 2nd I'm getting a lot less (1.5-1.7bar). I know I can run boost trims in each gear but rather than messing around and setting that up is it just easier to run closed loop?

Strictly speaking I'm not sure if you really should need closed loop - I guess I don't know how tricky your setup is, but I would have thought open loop should be sufficient with a good external gate setup to hold a pretty consistent boost level, unless it's actually just physically difficult to build that much boost in the lower gears with your setup and it's more a lag thing than a boost control one?

Either way, I've never used it - even with internal wastegates if you don't have any tricky stuff you are trying to achieve the open loop setup is pretty good. I think (/thought?) the gear trim thing was more to reduce or increase boost for each gear as opposed to aid it in reaching the target boost. .3+bar sounds to me more than what I'd have thought was the intention behind closed loop boost control, I figured it as just being there to tidy up slight deviations from the target.... getting near half a bar is like a whole different target though I could be off point here.

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Surely somebody has one in VIC. Have you asked at any shops?  Is this the yearly inspection or did you get a canary?
    • This is where I share pain with you, @Duncan. The move to change so many cooling system pieces to plastic is a killer! Plastic end tanks and a few plastic hose flanges on my car's fail after so little time.  Curious about the need for a bigger rad, is that just for long sessions in the summer or because the car generally needs more cooling?
    • So, that is it! It is a pretty expensive process with the ATF costing 50-100 per 5 litres, and a mechanic will probably charge plenty because they don't want to do it. Still, considering how dirty my fluid was at 120,000klm I think it would be worth doing more like every 80,000 to keep the trans happy, they are very expensive to replace. The job is not that hard if you have the specialist tools so you can save a bit of money and do it yourself!
    • OK, onto filling. So I don't really have any pics, but will describe the process as best I can. The USDM workshop manual also covers it from TM-285 onwards. First, make sure the drain plug (17mm) is snug. Not too tight yet because it is coming off again. Note it does have a copper washer that you could replace or anneal (heat up with a blow torch) to seal nicely. Remove the fill plug, which has an inhex (I think it was 6mm but didn't check). Then, screw in the fill fitting, making sure it has a suitable o-ring (mine came without but I think it is meant to be supplied). It is important that you only screw it in hand tight. I didn't get a good pic of it, but the fill plug leads to a tube about 70mm long inside the transmission. This sets the factory level for fluid in the trans (above the join line for the pan!) and will take about 3l to fill. You then need to connect your fluid pump to the fitting via a hose, and pump in whatever amount of fluid you removed (maybe 3 litres, in my case 7 litres). If you put in more than 3l, it will spill out when you remove the fitting, so do quickly and with a drain pan underneath. Once you have pumped in the required amount of clean ATF, you start the engine and run it for 3 minutes to let the fluid circulate. Don't run it longer and if possible check the fluid temp is under 40oC (Ecutek shows Auto Trans Fluid temp now, or you could use an infrared temp gun on the bottom of the pan). The manual stresses the bit about fluid temperature because it expands when hot an might result in an underfil. So from here, the factory manual says to do the "spill and fill" again, and I did. That is, put an oil pan under the drain plug and undo it with a 17mm spanner, then watch your expensive fluid fall back out again, you should get about 3 litres.  Then, put the drain plug back in, pump 3 litres back in through the fill plug with the fitting and pump, disconnect the fill fitting and replace the fill plug, start the car and run for another 3 minutes (making sure the temp is still under 40oC). The manual then asks for a 3rd "spill and fill" just like above. I also did that and so had put 13l in by now.  This time they want you to keep the engine running and run the transmission through R and D (I hope the wheels are still off the ground!) for a while, and allow the trans temp to get to 40oC, then engine off. Finally, back under the car and undo the fill plug to let the overfill drain out; it will stop running when fluid is at the top of the levelling tube. According to the factory, that is job done! Post that, I reconnected the fill fitting and pumped in an extra 0.5l. AMS says 1.5l overfill is safe, but I started with less to see how it goes, I will add another 1.0 litres later if I'm still not happy with the hot shifts.
    • OK, so regardless of whether you did Step 1 - Spill Step 2 - Trans pan removal Step 3 - TCM removal we are on to the clean and refill. First, have a good look at the oil pan. While you might see dirty oil and some carbony build up (I did), what you don't want to see is any metal particles on the magnets, or sparkles in the oil (thankfully not). Give it all a good clean, particularly the magnets, and put the new gasket on if you have one (or, just cross your fingers) Replacement of the Valve body (if you removed it) is the "reverse of assembly". Thread the electrical socket back up through the trans case, hold the valve body up and put in the bolts you removed, with the correct lengths in the correct locations Torque for the bolts in 8Nm only so I hope you have that torque wrench handy (it feels really loose). Plug the output speed sensor back in and clip the wiring into the 2 clips, replace the spring clip on the TCM socket and plug it back into the car loom. For the pan, the workshop manual states the following order: Again, the torque is 8Nm only.
×
×
  • Create New...