Originally Posted by G37Sam That's weird, my rev limiter was bumped up to 8k and the rpm cutoff was also narrowed down Have you actually driven it all the way
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04-29-2010, 09:11 PM | #91 (permalink) |
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Have you actually driven it all the way to 8k though? Because mine was bumped up too. But then we discovered that the rev limiter still kicks in at 7500.
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04-29-2010, 09:38 PM | #93 (permalink) |
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No need. I believe you. I wonder if it's just a matter of some ROM files being more 'agreeable' to the parameter changes than others. I don't know how else to explain the inconsistency of results with some cars accepting the rev limiter bumps and others just ignoring them.
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04-29-2010, 09:42 PM | #94 (permalink) |
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If you also noticed in the video's I recorded of my exhaust, you can hear the aggressive rpm cut-off. The cutoff band was set to around 200rpm before the tune, I had it brought down to 50 rpms after the tune.
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04-29-2010, 10:19 PM | #95 (permalink) |
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so I think this has already been kind of answered but does anyone know what type of power could be achieved when the vvel gets unclocked?
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04-29-2010, 10:47 PM | #96 (permalink) |
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Just guessing i would say you could tune out maybe 20whp N/A and maybe 40+ F/I . I dont think the total gains are going to be as important as the ability to keep power up thoughout the power band. Also will help a lot with keeping turbo lag low. Most gains will be in the low end do to the vvel trying to keep emissions low.
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04-29-2010, 10:57 PM | #98 (permalink) | |
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The fact that those are efficiently tuned from Nissan makes them a challenge on our engines though. I wouldn't be surprised if tuning the VVEL made zero gains on a stock VQ37. Don't forget the exhaust cams will also have to be upgraded
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04-29-2010, 11:52 PM | #99 (permalink) |
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My charts got screwed up when they tried to save them, but Chris and I just got back from tuning from Uprev and found and extra 15-17hp (depends on the mapping) and 5lb-ft of torque on all maps. It was a lot hotter out today from my posted dyno results but that is what we found from the base dyno pulls today. really happy with the results and failsafeperformance's tuning ability with Osiris Uprev software. He was able to answer all my questions and explain what he is doing with each adjustment. So I feel really good about instead of butterfly from messing with my ECU. We have to do a few more so hopefully will be able to post those results with the final mapping.
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04-30-2010, 11:53 AM | #100 (permalink) | |
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Oh, and I'll try to get some graphs posted up today. |
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05-01-2010, 03:05 PM | #101 (permalink) |
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I am stoked for the track, and can't wait to get the final map done and adjusted to tweak every little bit of performance out of the current set-up.
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05-01-2010, 08:35 PM | #103 (permalink) |
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SEMTEX - I think the limiter issue has to do with the tuners input, you have a limit for throttle and two for fuel, the idea that one is a gradual decline and one is a hard stop etc
Your throttle limit should be set lower then your fuel cut. Sam - awesome ride man
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05-01-2010, 09:00 PM | #105 (permalink) | |
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