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Go Back   TDIClub Forums > TDI Model Specific Discussions Areas > VW MKIV-A4 TDIs (VE and PD)

VW MKIV-A4 TDIs (VE and PD) This is a general discussion about A4/MkIV Jetta (99.5-~2005), Golf(99.5-2006), and New Beetle(98-2006). Both VE and PD engines are covered here.

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Old April 23rd, 2018, 17:04   #1
bbexotics
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Fuel Economy: 51mpgs in 96 passat,41mpg in 2004 passat,42mpg in 2006 jetta
Smile ALH MPGs timing

From past experiences, what is the best timing for maximum fuel mileage????? Donít care about more power, just maximum MPG. Want to hear opinions. thanks
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Old April 23rd, 2018, 17:47   #2
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The top of the timing graph in VCDS is said to be good for both MPG and power.
As is going up a size in nozzles if they're new. You can also adjust the IQ.
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Old April 23rd, 2018, 18:45   #3
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Between spot on and advanced timing. I haven't noticed significant differences between factory perfect and on the line advanced, with a new and healthy fueling system.
If tuned, you should set it on spot on timing, because the tuner will raise timing already
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Old April 24th, 2018, 03:42   #4
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Quote:
Originally Posted by Enabled View Post
Between spot on and advanced timing. I haven't noticed significant differences between factory perfect and on the line advanced, with a new and healthy fueling system.
If tuned, you should set it on spot on timing, because the tuner will raise timing already


Iíve always thought and read itís the other way around. When tuned, you want to be in the upper range of the timing graph near the green line, and iq adjusted accordingly.


Bajan
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Old April 24th, 2018, 04:46   #5
jettawreck
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I got my best mileage numbers when static injection timing was set near the top line on the graph and then set the adaptation numbers near the max. (I do have Sprint 520 nozzles, if it matters much). Managed some 900 mile tanks with those settings)
Have long since gone back to more conventional settings when I started to occasionally do some towing with the TDI.
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Old April 24th, 2018, 06:35   #6
bbexotics
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Best IQ setting and timing for stock engine. No injectors or tune, just plain stock.
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Old April 24th, 2018, 11:14   #7
BobnOH
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Conventional wisdom says close to the green, but like most conventional wisdom.....oh well.
Here is a very thorough thread from an old vet.
TDI Timing Revisited - TDIClub Forums
IQ likes to be around 2.2 all stock. Spec is 2.2 to 9.0.
Both have a pretty wide range and can also be modified using Adaptation.
Both are going to change dynamically by the ECU.
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Old April 24th, 2018, 16:11   #8
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Quote:
Originally Posted by red16vdub View Post
Iíve always thought and read itís the other way around. When tuned, you want to be in the upper range of the timing graph near the green line, and iq adjusted accordingly.


Bajan
When the tuner does a proper and correct job on the timing maps, you do not need to add timing to their timing maps by fidgeting with the adaptations or static timing.


Raising it by adaptations or static will also raise the minimum possible timing value (when you raise the ceiling you also raise the floor), so you lose dynamic range.
Dynamic range is great when you take advantage of it properly.
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-2003 Jetta TDI GLS Manual (Mods: SBC II Daily, .681 5th, VNT17 & PP520, Self Tuned)
-BMW 328is Manual (heavily modded 220whp, track toy)
-BMW Z3 Roadster (Fun in the sun car)
-BMW Z3 M Coupe (1 of 36)
-BMW 328d wagon (Self tuned ~230hp)
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