Tune Greddy Profec B Spec 2

[Deathvalley]

i just checked it is infact connected properly to the solenoid does it mean that the solenoid is not working then?

is there a chance that it might not be getting enough power to control the solenoid becasue i connected the power line which comes from the greddy unit to the line which came from the back of my cigerette lighter?

Edited April 18, 2014 by Deathvalley

[Deathvalley]

i figured out the problem.its the valve uni harness.the white thing that connects to the greddy main unit came right off.probably thats why it wasnt controling the solenoid.

is there anyway to fix that?or should i just order a replacement?

can anyone tell me how to check the solenoid.i want to see that it is working properly before i spend any money on this thing.

[Ben C34]

Can you cable tie the plug to hold it in?

To check it is working connect a bike pump to the gauge pressure line for the controller and with ignition on pump some pressure into it .

You should hear the solenoid pulsing quickly.

Edited April 18, 2014 by superben

[Deathvalley]

cant the white thing at the end that plugs into the greddy main unit is pretty much broken.

if i could find that white pin i could put it back on.

[GTSBoy]

If it were me, I would open up the main unit, solder on a couple of wires to the pads where the external socket is, bring those outside the case to a new multi-pin connector from Jaycar or similar, cut off damaged white plug and replace with matching connector from Jaycar. Job done. 15 minutes plus trip to Jaycar.

[Deathvalley]

@gts boy man great idea.

i checked in jay car

http://www.jaycar.com.au/productView.asp?ID=PP2020

the small one is the picture is the one that will connect to the greddy unit if i can get them to connect the wire to the pin then i dont need to take the main unit apart i think.

i will take that route if i m unable to find a solution.

thnxx alot mate.

[Deathvalley]

SUCCESS!!!

Thanks a lot @gtsboy your advice worked.i bought the white thing from jaycars and it pluged up straight to the main unit.hit 9 psi just in one run.

now i have some questions regarding tuning.

1-since i am auto should i tune it in 2nd or 3rd?

2-lets say my start boost is 8 psi and desired boost is 11 psi.DOES THAT MEAN IN A PROPER TUNE it will boost from 80 to 110?AND THERE SHOULD BE NO FALL IN THE BOOST WHEN ITS OPEN THROTTLE?

3-I am not sure what boost spike is i did only one run until 80 not sure in what gear but i saw the boost go up to 90 around 4500rpm but then it fell.IS THAT BOOST SPIKE?

thanks a lot in advance for all your help guys!!.

:yes: :yes: :yes:

[GTSBoy]

Good stuff.

Tune in 2nd to start with. 3rd will have you going very fast whilst trying to see what's going on with boost. But after you've got it set up you shoudl check what it does in 3rd also. You might want to adjust it a bit.

With ref to your point 2....yes and yes. Although boost may still drop off at the top end. And that may especially happen if you're getting into R&R territory and there is just too mush fuel and too little ignition advance to keep the fires stoked. The Profec's gain setting is what you should use to try to stop the boost falling away at the top end.

With ref to your point 3....if your start boost is 8 and you're aiming for 11, then 9 is not a spike. If your setpoint was actually 8 at the time, then yes, 9 is a spike.

[Deathvalley]

ya that what i was thinking if i try to tune it in 3rd gear it already goes up to 150 kmh in 5500 rpm.my car is boost 8 psi stock so i am gona tune it for 11.tomorrow i am driving to grampians so hopefully i will get it done there.

so basically spike is if it goes above my desired boost level.for eg i want 11 psi goes up to 12 at some point thats spike.

if boost goes to 11 around 5500 rpm but falls later on that means i need to adjust gain.

all good.

lets see what happens tomorrow.

[GTSBoy]

Spiking usually occurs just as boost rises to max. Goes past max. Usually occurs due to poor control, which in relation to EBCs tends to mean either the gate is set too high (start boost is set too close to target boost) or the gain is too high.

[Deathvalley]

couldnt wait until grampians. so went out to tullamarine just now.

i achieved 111 with

set 33

gain 33

set gain 70

the gain is too high but i could achieve constant boost throughout the rpm.

with this setting there was a slight drop like 109,108,then it was 110 and just before shifting to 3rd 111.will try to fine tune it tomrrow but is this good enuf?

[GTSBoy]

Oh, I wouldn't be too worried about boost dropping from a target of 11 to 10.5 or so anyway. You've got it essentially dead flat. So if you think you've got too much gain on board, just back it off a touch.

[hardsteppa]

if your target boost is 11psi you can probably bring up the set gain from 70 (7psi) to 90 or 95, bit closer to your desired boost level.

[Ben C34]

  On 22/04/2014 at 2:45 AM, hardsteppa said:

if your target boost is 11psi you can probably bring up the set gain from 70 (7psi) to 90 or 95, bit closer to your desired boost level.

Or not.

The turbosmart eboost 2 recommends the set point (same as set gain on ptofec) yo be 5 psi less than setting.

But try it and see to be sure.

[hardsteppa]

He's not using the turbosmart eboost. He's using the profec.....which recommends set gain a cpl of psi below target boost. Why would he follow the instructions of a different manufacturer for a completely different boost controller rather than that of the one he is using...?

[Ben C34]

Thanks for pointing out the thread title

I am aware of what he is using. I added that info so he is aware other manufacturers don't suggest setting the set point so close to the target as it can cause spiking.

Have you ever set up a profec? I have found if the set gain is too close it will spike, using a profec.

At the end of the day I don't care what he does, using it on a stock car is a waste of money.

[Deathvalley]

ya setting set gain too close to wanted max boost gives boost spike.

i have it pretty much tuner actually i think its ok.

@superben.

man i just came back from grampians the roads are really nice and without any cameras so i tested out the car several times in stock boost and high boost.

i donno why u keep sayin putin the boost controller is a waste but 100-180 in 11 psi was really a lot alot faster then the stock boost.

i was actually selecting my mod list according to the HPI R34 VIDEO on youtube.

with a full turbo back exhaust system and 10psi boost they got 33kw gain on wheels.

i know i havent dynoed my car but even if i have 20 kw gain after the boost controller i dont think thats that bad.

[Ben C34]

What I was saying (badly) is that an electronic controller is a waste in your case . A cheap bleed valve would have achieved the same result for less cash.

Never the less,I'm glad it has made a decent improvement for you.

[Deathvalley]

ouu,ok.ya but i didnt really spend a lot for the boost controller.and a bleed valve and new boost gauge will cost me almost the same i guess so its all good.