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Bad Harmonic w/ Comptech SC -> Is this normal?

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Old Apr 4, 2001 | 05:09 PM
  #151  
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sadness dissapointment exasperation

these are the first impressions after installing rev2 of the check valve. although the car is smoother than it was and more responsive, it still had major hesitation in spots (wasn't my shifting!) and minor hesitation between 3-4K when going from steady state partial throttle to full throttle. The major hesitation happened right after shifts at WOT. The transient was very quick (very short bog, quick recovery), but also very evident. For all I know, whatever improvement I saw was because I reset the ECU and not because of the new valve/bleeder.

After writing the above, I needed to put the car in the garage for the night and I hate starting the car and only moving it 50 ft., so I took a drive around the block (the looong way). The major hestitation described above didn't seem evident, but the minor hesitation still seemed present.

I will reserve full judgement until after tomorrow's drive to work, but I am not optimistic. I will email Shad with my impressions tomorrow evening. I think I am at the point where I have to say the mechanical solution is not going to work for me. It seems so susceptible to external conditions that I think there will always be some issues and they may come and go.

I am going to have to get serious about building a ghostbooster, but I am going to investigate the plug and play solution. The MAP looks like it was made by denso (says denso right on the sensor, so I am comfortable with this statement), so I will try contacting them to see if maybe they sell or know where to get the mating connector for the sensor.

Enough rambling for now, sorry for the long post. at least my damn wheel problem is solved!
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Old Apr 4, 2001 | 06:30 PM
  #152  
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rock, my offer of the tweeked diaphragm for the black square check valve setup still stands. It works flawlessly!

Will receive and install the SplitSecond Adjustable Voltage Clamp tomorrow and test it for the right setting (if there is one) and feed the info back to Mark so he can offer the product for sale (maybe even to Comptech). In addition, Harry is going to build a ghost pack (or two) over the weekend (THANKS HARRY!!!!!) for us to play with.
Don
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Old Apr 4, 2001 | 06:42 PM
  #153  
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From: Houston
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[QUOTE]Originally posted by RT
[B]rock, my offer of the tweeked diaphragm for the black square check valve setup still stands.
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Old Apr 4, 2001 | 06:51 PM
  #154  
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Thanks RT. Let me see how it goes over the next few days. If it improves (fingers crossed here), or at least stays the way it is now, I can hold out until a "final" fix.

I know with everything going on, something will fall out that solves the problem. It is just frustrating, because you get the feel of the potential of the SC, but not the satisfaction of having a 100% system.

Question: does the Helm manual list part numbers for connectors and harnesses? I sent an email to a U.S. Denso division about the electical interface connector for the MAP, but I am sure this is not the right division and am not sure I will get a response to the email.
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Old Apr 4, 2001 | 09:16 PM
  #155  
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[QUOTE]Originally posted by rocketman
[B]Thanks RT.
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Old Apr 4, 2001 | 10:03 PM
  #156  
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[QUOTE]Originally posted by Wesmaster
[B][QUOTE]Originally posted by RT
[b]rock, my offer of the tweeked diaphragm for the black square check valve setup still stands.
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Old Apr 4, 2001 | 10:13 PM
  #157  
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[QUOTE]Originally posted by RT
[B][QUOTE]Originally posted by Wesmaster
[b][QUOTE]Originally posted by RT
[B]rock, my offer of the tweeked diaphragm for the black square check valve setup still stands.
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Old Apr 4, 2001 | 10:45 PM
  #158  
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thanks Keith, we'll see what Wes want to do
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Old Apr 4, 2001 | 10:51 PM
  #159  
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Has anyone considered taking a MAP reading before the supercharger inlet? It may or may not work, but this method will never show boost. The vacuum level will correspond to throttle opening, the only question being whether or not it will map (no pun intended) directly to the reading sensed after the supercharger in the current application.

Provided that the fuel pressure regulator still obtains manifold pressure after the supercharger, fuel enrichment will continue as before.

Just something to consider. Perhaps Comptech has a reason they didn't do this (non-linear boost curve of a centrifugal blower?). If you try it, listen carefully for detonation.

UL
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Old Apr 4, 2001 | 11:14 PM
  #160  
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Something to consider but I'm pretty sure it won't work because the MAP doesn't work like a flow meter, it
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