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Title: VAG 1.8t - VVT for performance/spool Post by: rotax on February 09, 2017, 06:01:13 AM Hi
When digging into the VVT and what's it is used for the most common answer on the net is that it's purely used to reduce emissions. Some are suggesting that in some factory calibrations it's really used to enhance performance and low end torq and spool characteristics. I'm looking for the facts here, are there any known factory 1.8t calibration that really uses VVT to enhance spool and low-end torque? Title: Re: VAG 1.8t - VVT for performance/spool Post by: Pynoxim on February 09, 2017, 11:21:53 AM Hi When digging into the VVT and what's it is used for the most common answer on the net is that it's purely used to reduce emissions. Some are suggesting that in some factory calibrations it's really used to enhance performance and low end torq and spool characteristics. I'm looking for the facts here, are there any known factory 1.8t calibration that really uses VVT to enhance spool and low-end torque? Yeah, 8L S3, B6 and B7 Audi all use VVT for performance AFAIK. It was enabled by default on my B7 1.8T. Title: Re: VAG 1.8t - VVT for performance/spool Post by: prj on February 11, 2017, 02:29:17 PM All 1.8T K04 with VVT.
B5 S4 2.7TT B5 RS4 2.7TT All B6 and B7 1.8T. C5 RS6 4.2TT Title: Re: VAG 1.8t - VVT for performance/spool Post by: nyet on February 11, 2017, 03:01:00 PM Yea, this guy is stoked that his emissions footprint is so awesome:
(http://images4.wikia.nocookie.net/__cb20071019141512/uncyclopedia/images/7/7b/Vtec_kick_in_yo.jpg) Title: Re: VAG 1.8t - VVT for performance/spool Post by: rotax on February 12, 2017, 01:28:58 AM All 1.8T K04 with VVT. B5 S4 2.7TT B5 RS4 2.7TT All B6 and B7 1.8T. C5 RS6 4.2TT Great! Would you say there are code/logic differences between a file such as mentioned above and a VVT(emission reducing oriented) file? Or are there just differences in the mapping between them? Title: Re: VAG 1.8t - VVT for performance/spool Post by: fknbrkn on February 12, 2017, 01:39:54 AM there is a topic somewhere about vvt
ive made some runs with and without vvt overlap during spool violet lines - actual pressure green - requested blue - cam degree (https://a.d-cd.net/d89cf6es-960.jpg) Title: Re: VAG 1.8t - VVT for performance/spool Post by: prj on February 12, 2017, 03:38:23 AM You should not be looking at pressure, it is meaningless.
The correct way is to plot it on the dyno. There are so many things overlap affects and pressure is probably the least important one. Title: Re: VAG 1.8t - VVT for performance/spool Post by: 4ringpieces on February 13, 2017, 08:19:09 AM Anyone know the camshaft specs for a BAM engine and how much overlap the vvt changes?
You can crudely change set points vs acceleration rate, but that was simpler when older cars (not vag) only had rpm set on and off points and not load and rpm set points Title: Re: VAG 1.8t - VVT for performance/spool Post by: aef on February 14, 2017, 12:14:14 AM http://nefariousmotorsports.com/forum/index.php?topic=8961.0
Here is a stock file log from S3 8L K04 facelift car. BAM/AMK should have: intake: 7,67mm, 190°, 18° after TDC exhaust: 9,3mm, 210°, 10° before TDC Title: Re: VAG 1.8t - VVT for performance/spool Post by: tom-k on October 07, 2020, 02:31:05 AM I`m looking for CDNWS in BEX file 8E0909518AS (my tuned below), becaue VVTi it`s still advanced after started engine
Title: Re: VAG 1.8t - VVT for performance/spool Post by: Auriaka on October 07, 2020, 02:59:17 PM 0x181AF
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