S2000 Forced Induction S2000 Turbocharging and S2000 supercharging, for that extra kick.

Got my dyno sheet scanned.

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Old Sep 28, 2006 | 11:37 AM
  #31  
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Just to clarify, the OP's problems are on PARTIAL throttle.

To my understanding, I dont think that your FPR settings will affect your partial throttle settings too much.

As we discussed over instant messanger EK9max, on partial throttle your ECU is still adjusting for AFR. So if you feel a bog, its doesnt necessarily mean its due to rich conditions. If your FPR is giving too much pressure, I would assume the ECU would reduce the duty cycle of your injectors to compensate for the extra fuel pressure. Your graph above is of WOT, so I think its pretty irrelevant when trying to troubleshoot your problem.

I think your belt routing is highly suspect. If your belt is routed improperly, or perhaps is rubbing a bolt, then it may cause your car to "fight" or resist partial throttle acceleration. I'd pay close attention to the belt or any strange noises coming from the belt. Also check for irregular belt wear.

my two cents...
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Old Sep 28, 2006 | 11:40 AM
  #32  
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Originally Posted by elusiv,Sep 28 2006, 11:37 AM
Just to clarify, the OP's problems are on PARTIAL throttle.

To my understanding, I dont think that your FPR settings will affect your partial throttle settings too much.

As we discussed over instant messanger EK9max, on partial throttle your ECU is still adjusting for AFR. So if you feel a bog, its doesnt necessarily mean its due to rich conditions. If your FPR is giving too much pressure, I would assume the ECU would reduce the duty cycle of your injectors to compensate for the extra fuel pressure. Your graph above is of WOT, so I think its pretty irrelevant when trying to troubleshoot your problem.

I think your belt routing is highly suspect. If your belt is routed improperly, or perhaps is rubbing a bolt, then it may cause your car to "fight" or resist partial throttle acceleration. I'd pay close attention to the belt or any strange noises coming from the belt. Also check for irregular belt wear.
Well it is partial AND WOT. If I'm at 2000 rpm and WOT it. Then it's still a dog.

it's more of a low rpm thing rather than a WOT and partial throtle thing.

And above 6000 it feels ok. But that migh tjust be because it's faster than before when i didn't have a sueprcharger.....
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Old Sep 28, 2006 | 11:42 AM
  #33  
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Originally Posted by xviper,Sep 28 2006, 11:35 AM
OK, this is where it was unclear. I thought you drove it from the dyno for a little while and it was "OK" and the latest problems started after the initial drive home.
In this case, I would suggest you try one turn and see if it changes anything for the better or worse. Don't go beyond the 3 turns that was done. Maybe go to another dyno facility.
I was thinking the same thing. Turn it back one turn.


On the dyno when he read LEAN. We turned it once. And that really didn't maek a difference. So we turned it 2 more times. That's when the AFR's went richer.

I'm starting to think that a faulty wideband at davenport may be the culprit. However at idle I coudl see that iwas reading great at 14.5-14.7 range.
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Old Sep 28, 2006 | 11:43 AM
  #34  
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its hard to say...

im running 6.5 psi with a smaller pulley and my car is definitely a dog at 2000rpm regardless of throttle position...
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Old Sep 28, 2006 | 11:48 AM
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Originally Posted by elusiv,Sep 28 2006, 11:43 AM
its hard to say...

im running 6.5 psi with a smaller pulley and my car is definitely a dog at 2000rpm regardless of throttle position...
yea but It's more of a dog that stock. And way more of a dog prior to the "tune"

When I leave the lights, I have ride the cluthc a bit to prevent bogging/stalling
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Old Sep 28, 2006 | 02:07 PM
  #36  
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Well I got my esm connections checked. They are soldiered and have good contact.

All vacuum lines and everything is hooked up properly with no leaks.

I turned the FPR back 3 turns. So it's set back to what it was out of the box.

And teh car is running better/peppier. I haven't gone above 6000rpm because i'm scared now.
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Old Sep 28, 2006 | 02:49 PM
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2000 rpm and WOT? Thats almost idle , every s2000 is a dog and since you have a SC it might be worse than a none SC at that RPM.
Who knows... good luck!
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Old Sep 28, 2006 | 03:41 PM
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Yea but 2000 rpm in 1st and 2nd gear..... it was a dog.
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Old Sep 28, 2006 | 04:45 PM
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Sounds like you're running too rich before boost. Low tens before boost may cause the car to stutter/stumble - have you noticed any black smoke during those conditions?

Something which might be worth reiterating at this point is that you've added a freer flowing exhaust which may be the culprit for your higher AFRs after vtec.
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Old Sep 28, 2006 | 10:02 PM
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Originally Posted by s0rted,Sep 28 2006, 04:45 PM
Sounds like you're running too rich before boost. Low tens before boost may cause the car to stutter/stumble - have you noticed any black smoke during those conditions?

Something which might be worth reiterating at this point is that you've added a freer flowing exhaust which may be the culprit for your higher AFRs after vtec.
yah I was worried about that after I installed the kit....


However now I'm stuck in a pickle.... Daily drivability, or safe VTEc.

I'm still thinking that the dyno's wideband was wrong for some reason.
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