I'm not sure if this is psychological or real.... I have been noticing a distinct difference in engine behavior with the VDC program turned off compared to having it on.
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09-01-2011, 11:54 AM | #1 (permalink) |
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VDC quirks after UpRev
I'm not sure if this is psychological or real.... I have been noticing a distinct difference in engine behavior with the VDC program turned off compared to having it on. All of this after I got my ECU UpRev tune.
With the VDC turned on: No noticable engine knock, better torque "feel" at low (under 2k rpms) revs, no initial start-up knock. With VDC turned off: a noticable engine knock at low rpms (under 1K), slight hestiation between 2000 to 2800 rpms, and a slight knock at initial cold start-up. Someone tell me I'm crazy... or is this real? (Serious responses only, please)
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Andrew 2009 370Z Sport/Touring 6MT sold 2013 Honda Civic Si coupe D/D |
09-01-2011, 12:05 PM | #4 (permalink) |
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Can you log on Cipher to see what the timing is doing and throttle position?
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09-01-2011, 12:28 PM | #5 (permalink) | |
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It's really not an issue. I find that the engine is perfect with the program on. I was just wondering if anyone else has noticed this. Since I mostly drove the car with the program turned off. But since the tune, I drive it with the program turned on.
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Andrew 2009 370Z Sport/Touring 6MT sold 2013 Honda Civic Si coupe D/D |
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09-01-2011, 12:30 PM | #6 (permalink) |
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Hmmm I wonder if my cable will allow us to log with Cipher? I'll check into that
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09-01-2011, 01:02 PM | #7 (permalink) |
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I don't think so. Your license is different than mine. And when the software seaches my VIN, it won't allow a different license to have access. (The license software is built into the cable.)
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Andrew 2009 370Z Sport/Touring 6MT sold 2013 Honda Civic Si coupe D/D |
09-01-2011, 01:06 PM | #8 (permalink) |
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Your Crazy!!!!!!!!!!! LOL J/k. I never had these issues but I do feel a difference with the VDC off in a good way. On I feel the car hold back more often almost like I'm losing traction when I should not be. I have even had VDC blink on my dash if I pop her down to like 3rd at highway speeds and punch it. I know I'm not losing traction just weird.
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09-01-2011, 01:08 PM | #9 (permalink) |
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Does the knock happen while on the aggressive map only? What happens when you switch to the normal UPrev map then turn VDC off. I'm planning on getting the tune done but wouldn't really want to deal with glitches or bug related to UPRev.
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09-01-2011, 01:09 PM | #10 (permalink) | |
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Yeah, I've noticed the wheel spin indicator lamp on the dash light up under a full-throttle burn too (with the program turned off). That's the abs sensor noticing a very slight (you'd never feel it) "wheel starting to spin" situation.
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Andrew 2009 370Z Sport/Touring 6MT sold 2013 Honda Civic Si coupe D/D Last edited by 6MT; 09-01-2011 at 01:11 PM. |
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09-01-2011, 01:35 PM | #11 (permalink) |
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If you've made changes to the tire diameters (new tires and/or wheels) that could affect VDC's sensitivity as well. But the engine knock / hesitation thing is troubling. Have you tried reflashing to stock and back again, and experimenting with both?
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09-01-2011, 01:58 PM | #13 (permalink) | |
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Quote:
My question was; is anyone else noticing this issue with the VDC on/off?
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Andrew 2009 370Z Sport/Touring 6MT sold 2013 Honda Civic Si coupe D/D |
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09-01-2011, 02:13 PM | #14 (permalink) |
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I only had one map done and I cleared the OEM one. I didn't see any point in switching maps for the kind of driving I do.
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Andrew 2009 370Z Sport/Touring 6MT sold 2013 Honda Civic Si coupe D/D |
09-01-2011, 02:35 PM | #15 (permalink) | |
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