Jump to content
SAU Community

Recommended Posts

hmm i might try that tomorrow then.

there is ignition timing and additional boost on the nismo - actually not sure about the boost increase.

well i know the arx MUST be tune differently as from factory it runs a few psi extra.. and who knows if nissan advanced abit of timing to compensate for the extra ass...

Getting back to informeter and modifying the signals from these 2 pots, when I made changes to increase opening from 80% to 90%, the informeter would read LESS than 80% (closer to 70% actually) and then the ECU would back off the fuel (cause it thinks I don't have the throttle opened as much as I do) so I would see the injector pulse width drop down (meantime I'm going faster) & of course the knock sensor would put an end to it pinch.gif I'm hoping for better results at the lower end of the spectrum though. There's more fuel at launch and that is where we want the benefit anyway soooo.... we'll wait & see.

seeing as i've got a wideband in maybe me n scott will also figure this one out. but im starting to think it may have something to do with the fuel map as Cihan cant tune the car under 3000rpm when in third, as if he floors it it will kick down to first and jump off the dyno..

so it could also be a possbility that the low end fuel map is muck, as mine does strange things according to the wideband, but once it gets to 3000rpm, ratio sits at about 12v and everything hammers

maybe we could talk Ian into sticking his spare motor on an engine dyno to see if Gihan can tune the emanage to suit! :P

Not that it would really concern Ian or I....but we do like to help when we can.

maybe we could talk Ian into sticking his spare motor on an engine dyno to see if Gihan can tune the emanage to suit! :P

Not that it would really concern Ian or I....but we do like to help when we can.

I think if the transmission has anything to do with it, just an engine dyno wouldnt work i dont think.. Cihan needs to do a track coughroadcough tune from standing still, to full ball in first. Maybe we can get around it with just that(i like to dream)

maybe we could talk Ian into sticking his spare motor on an engine dyno to see if Gihan can tune the emanage to suit! :P

Not that it would really concern Ian or I....but we do like to help when we can.

Now that's a generous offer :thanks: guys.

Edited by Commsman

just food for lhought guys

the voltage range on most tps's is 0-5V

when you hook up an ecutalk display you can configure it to show tps volts or %

but for the % to show correctly you have to calibrate it as WOT isn't actually the max range of the sensor

is there any way to calibrate your display thingos?

and has anyone run the throttle out of the car and seen how far the butterfly is open at 86%?

yeah we already know its a range calibration on the informeter, i mentioned that one page back. at 86% its WOT

thats not the problem. being BTW the ECU retards the throttle to limit torque, we want it back. at almost any cost :P

I reset the Voltage range for the throttle this morning on the the informeter and now see throttle in the 40% bracket when stalling. It was a very brief stall and not completed so this may be a little higher in reality.

I will try to get a proper number later today.

I reset the Voltage range for the throttle this morning on the the informeter and now see throttle in the 40% bracket when stalling. It was a very brief stall and not completed so this may be a little higher in reality.

I will try to get a proper number later today.

by doing the Throttle position reset or?

is there a way to do it in the informeter??

just food for lhought guys

the voltage range on most tps's is 0-5V

when you hook up an ecutalk display you can configure it to show tps volts or %

but for the % to show correctly you have to calibrate it as WOT isn't actually the max range of the sensor

is there any way to calibrate your display thingos?

and has anyone run the throttle out of the car and seen how far the butterfly is open at 86%?

VQ's have twin TPS signals, 0-5v and 5-0v.

The 36% at stall opening is the big issue, not the 86% once it opens.

Perhaps the issue at stall is just an input to the ecu from the brake. Maybe the nismo has this turned off but for those of us without "awesome", we could just cut the wire....

my thought exactly. i said it earlier but im not too confident in exactly which wire that is.

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

    • I guess one thing that might be wrong is the manifold pressure.  It is a constant -5.9 and never moves even under 100% throttle and load.  I would expect it to atleast go to 0 correct?  It's doing this with the OEM MAP as well as the ECU vacuum sensor. When trying to tune the base map under load the crosshairs only climb vertically with RPM, but always in the -5.9 column.
    • AHHHH gotchaa, I'll do that once I am home again. I tried doing the harness with the multimeter but it seems the car needed a jump, there was no power when it was in the "ON" position. Not sure if I should use car battery jump starter or if its because the stuff that has been disconnect the car just does send power.
    • As far as I can tell I have everything properly set in the Haltech software for engine size, injector data, all sensors seem to be reporting proper numbers.  If I change any injector details it doesnt run right.    Changing the base map is having the biggest change in response, im not sure how people are saying it doesnt really matter.  I'm guessing under normal conditions the ECU is able to self adjust and keep everything smooth.   Right now my best performance is happening by lowering the base map just enough to where the ECU us doing short term cut of about 45% to reach the target Lambda of 14.7.  That way when I start putting load on it still has high enough fuel map to not be so lean.  After 2500 rpm I raised the base map to what would be really rich at no load, but still helps with the lean spots on load.  I figure I don't have much reason to be above 2500rpm with no load.  When watching other videos it seems their target is reached much faster than mine.  Mine takes forever to adjust and reach the target. My next few days will be spent making sure timing is good, it was running fine before doing the ECU and DBW swap, but want to verify.  I'll also probably swap in the new injectors I bought as well as a walbro 255 pump.  
    • It would be different if the sealant hadn't started to peel up with gaps in the glue about ~6cm and bigger in some areas. I would much prefer not having to do the work take them off the car . However, the filler the owner put in the roof rack mount cavities has shrunk and begun to crack on the rail delete panels. I cant trust that to hold off moisture ingress especially where I live. Not only that but I have faded paint on as well as on either side of these panels, so they would need to come off to give the roofline a proper respray. My goal is to get in there and put a healthy amount of epoxy instead of panel filler/bog and potentially skin with carbon fiber. I have 2 spare rolls from an old motorcycle fairing project from a few years back and I think it'd be a nice touch on a black stag.  I've seen some threads where people replace their roof rack delete with a welded in sheet metal part. But has anyone re-worked the roof rails themselves? It seems like there is a lot of volume there to add in some threads and maybe a keyway for a quick(er) release roof rack system. Not afraid to mill something out if I have to. It would be cool to have a cross bar only setup. That way I can keep the sleek roofline that would accept a couple bolts to gain back that extra utility  3D print some snazzy covers to hide the threaded section to be thorough and keep things covered when not using the rack. 
    • Probably not. A workshop grade scantool is my go to for proper Consult interrogation. Any workshop grade tool should do it. Just go to a workshop.
×
×
  • Create New...