Jaycar Boost and Fuel Control

[AlexCim]

2 stage boost?

[chrissso]

I got my car retuned today after fitting a new fuel pump.

Outcome, I'm getting more power with richer fuel ratios and less timing!!!

To explain more,

The green line is the end result of the last tune with the DFA before I got the fuel pump replaced. We had to add fuel in up the top as the fuel pressure was not enough.

The blue line is when the fuel pump was put in.

The red line is the tne result from the DFA and fuel pump, we had to retard the timing as it was advancing up top due to pulling out fuel, and starting to ping. We had to add fuel in down the bottom to get it to 12:1, so I lost a bit there but you can really feel it pull hard at 4500.

Please note that the dyno is 10% pesimistic, and not done in shootout mode. Approx 183rwkw

Edited February 2, 2006 by chrissso

[crazyas]

Hey was wondering if anyone can help me out.. got the DFA built but having issue's to calibrating the unit..

It seems that TP2 reads -4.30V and OUTPUT reads -0.60V all the time, doesn't matter how much i play with the trimpots it wont change

ive had a look at the board but can't find any faults or maybe after looking at it so much im just overlooking it hehe,

attached some pics maybe someone can spot something?

Cheer,

AS

[ian]

Well there you go, I didn't know this!! I thought mine had shat it's self...

Am I right in saying that it's reponse is slow?

Chriso

Nope, it's response is reasonably fast. I get changing values through the consult interface about every 60mS, ie from one of my recent test runs (with my new program) (and ignore what units the boost etc are in) (and no, not a hard launch!) -

Time RPM Speed km/h Throttle Injection Time ms Timing (degree BTDC) Boost

0.517 712.5 2 0.82 3.19 12 1

0.546 712.5 2 0.82 3.52 11 1

0.576 712.5 2 0.82 3.84 10 1

0.620 762.5 2 0.82 3.66 14 22

0.649 800 2 0.82 4.01 20 22

0.678 825 2 0.82 4.16 20 22

0.709 912.5 2 0.82 4.34 20 55

0.757 987.5 2 0.82 4.19 22 55

0.786 1037.5 2 0.82 4.24 23 55

0.811 1125 2 0.82 4.31 23 89

0.859 1187.5 2 0.82 4.46 26 89

0.889 1250 2 0.82 4.43 26 89

0.914 1300 2 0.84 4.44 27 113

0.962 1350 2 0.86 4.40 27 113

0.991 1387.5 2 0.88 4.43 28 113

1.016 1412.5 2 0.92 4.48 27 125

1.064 1437.5 2 0.92 4.49 27 125

1.093 1437.5 2 0.94 4.37 27 125

1.123 1437.5 2 0.94 4.38 27 134

1.158 1412.5 2 0.94 4.43 27 134

1.187 1400 2 0.94 4.46 27 134

1.216 1362.5 2 0.94 4.42 26 137

1.260 1350 2 0.94 4.50 26 137

1.290 1312.5 2 0.94 4.51 25 137

1.319 1300 2 0.96 4.61 25 137

1.363 1275 2 0.98 4.73 24 137

1.392 1250 2 0.98 4.70 23 137

1.421 1237.5 2 0.98 4.80 22 136

1.465 1175 2 1.00 4.90 22 136

1.494 1175 2 1.00 5.15 22 136

1.524 1150 2 1.00 5.21 21 143

1.568 1125 4 1.00 5.26 21 143

1.597 1125 4 1.00 5.28 20 143

1.642 1087.5 4 1.00 5.31 20 149

1.670 1075 4 1.00 5.41 20 149

1.700 1037.5 4 1.00 5.39 20 149

1.729 1037.5 4 1.00 5.40 19 155

1.781 1012.5 4 1.00 5.51 19 155

1.810 987.5 4 1.00 5.43 19 155

1.841 975 4 1.00 5.49 18 157

1.884 987.5 4 1.00 5.53 19 157

1.913 1025 4 1.00 5.53 18 157

1.951 1087.5 4 1.00 5.52 19 163

1.980 1087.5 4 1.00 5.40 20 163

2.009 1125 4 1.00 5.49 21 163

2.054 1187.5 4 1.00 5.46 21 165

2.083 1200 4 1.00 5.34 22 165

2.112 1225 4 1.00 5.42 22 165

2.156 1237.5 4 1.00 5.40 22 165

2.185 1275 4 1.00 5.29 22 165

2.214 1275 4 1.00 5.36 23 165

2.245 1287.5 4 1.00 5.32 23 166

2.293 1287.5 10 1.02 5.34 23 166

2.323 1312.5 10 1.02 5.34 23 166

2.360 1362.5 10 1.04 5.20 24 168

2.389 1400 10 1.06 5.23 24 168

2.419 1437.5 10 1.06 5.20 24 168

2.450 1462.5 10 1.08 5.21 25 180

2.498 1500 10 1.12 5.24 25 180

2.542 1512.5 10 1.16 5.40 25 180

2.552 1525 10 1.22 5.55 24 191

2.600 1525 10 1.26 5.63 25 191

2.629 1575 10 1.30 5.75 25 191

Ian

[Sydneykid]

Bump because I am sick of responding to PM's from people too lazy to do a search.

cheers

[AMS]

hmm I should really start building my kits

[benro2]

Hi guys,

This may seem like a stupid question, but I've searched all through this topic and the forums and can't seem to find the correct voltage range for a Skyline R33 GTS-T SII auto ECU. I *thought* I saw someone mention 0-5V. Is this correct? I may have the incorrect terminology here, but basically what I'm trying to do is set the voltage range for the DFA kit. So that's what I'm talking about

I have just tested my kits, except for the potentiometer test with the DFA, and I am completely amazed to find that everything has worked perfectly so far, first go! I say this because I've never built any kits at all, ever. So if I can do it, anyone can! I just made sure I double checked everything before I soldered it in, and went through the parts list beforehand and ticked everything off.

Also, if you want to look through extremely large threads like this one all in one page, a handy way to do it is to select Options > Print this topic (found at top RH corner of the page). I know a lot of people may already know this, but I just found it

I would also like to thank Sydneykid very much for helping me via PM's along the way, so I don't blame him for asking people to do a search before PM'ing him. I can only imagine how many PM's he would get every day, and he actually takes the time to carefully respond to them all without ever getting annoyed. So please search as much as you can before PM'ing him (guilty myself )!

Ben

Edited May 6, 2006 by benro2

[NewKleer]

0-5v

[benro2]

0-5v

Thanks!

[Frink]

HELP! HELP! HELP!

WOW! i just installed the boost controller and it works. it works a little too well. i just changed the plumbing of the wastegate actuator and solonoid to what SK had it on the 3rd page and no matter what settings i put into the unit, i cant keep the boost under 15 psi! dangerous... YES!!! what have i done wrong? any help would be great. have i plumbed it in wrong? i can post up some pics you like....

[AlexCim]

Your vent size is too big.

Remove the metal restrictor from the hose, drop some solder into it and redrill it to 1 or 1.25mm. Put it back in the hose and away you go.

[3intheBack]

I need an ECU pin out diagram for the S2.

I printed a diagram from this thread somewhere which I believe to be for an R34 and it was obvious from the diag. of the centre mounting block which side is left and/or right. But when I pulled off the cover to my S2 Neo ECU there seems to be no discernable way to tell which end from which.

The pinout pattern looks almost identical though I cant be sure and I am not about do something silly and burn out a $2k ecu.

[Frink]

nope, the restrictor trick didn't work. im really stumped. im gonna try a different solonoid tomorrow. the only other thing i can think of is that i haven't wired into the solonoid properly..... anyone else come across this???

also, what settings are other people using? load points and duty cycle %. im just curious....

cheers

Edited May 14, 2006 by Frink

[AMS]

Hey Guys

Had the IEBC installed yesterday... (Thanks to Andy for it!) and today I finished the Hand Controller - I'm sorry to not look through all of the 39 pages of info, but when I plug the Hand Controller into the IEBC, I get light from the screen, but no readings etc.

What could be the problem?

Cheers

Chris

[NewKleer]

contrast of lcd or u didnt connect the controller up before turning it on etc.

[AMS]

Cheers mate. I had it connected before i turned it on... But how do I change the contrast? I dunno if its that, because the screen is just completely blank. Nothing

[NewKleer]

im sure theirs a contrast potentiometer in there somewhere. a blue rectangular thing with a little turning knob in the corner?

like one of these (maybe bottom left?):

http://www.vatronics.com/trimmerpotentiometers.jpg

Edited May 18, 2006 by NewKleer

[Oosh]

Yeah that thing is a waste, it needs to cranked all the way up to show anything, it may as well just be a simple resistor.

Oh and this is what you're looking for:

Edited May 19, 2006 by Oosh

[AMS]

Thanks heaps guys That worked a treat... Now I shall try my hand at tuning the boost...

[dontfeelcold]

Has anyone thought about using the Digital Pulse Adjustor to intercept the signal coming out from other sensor or going into other inputs?

Maybe to adjust the ignition timing?

Possibly to something about that protect mode where it richens up A/F mixtures to save the engine? (not sure how it works so I could be wrong)

Adjusting the point VCT kicks in? (or if you could graft the VCT onto the exhaust side and control that)

Just throwing a few suggestions in the air, it seems like this kit has alot of potential, please correct me if I am wrong.