IS38 1.8T Info/Discussion

[Ironshade]

Was curious. If drivetrain loss is same awd vs fwd.. wheres these big differances in mpg come from? Def not the 200lbs causing it alone

 

[crxgator]

Did this today going up a slight incline. Hot and humid as balls too.

Sent from my iPhone using Tapatalk

 

[Ironshade]

Did this today going up a slight incline. Hot and humid as balls too.

Sent from my iPhone using Tapatalk

Is this with draggy? I seriously gotta get one if it is

 

[Armchair Racer]

Who said it was the same? I don't recall anyone. You said the drivetrain loss difference was 15%. I said it's more likely closer to 1-2%.

Which two specific models are you referring to that have a big difference in MPG?

Was curious. If drivetrain loss is same awd vs fwd.. wheres these big differances in mpg come from? Def not the 200lbs causing it alone

 

[Armchair Racer]

Are these the MPGs you're referring to? (See the bottom of the second page):

https://newspress-vwusamedia.s3.ama...2018GolfSportWagenTechnicalSpecifications.pdf

If so, it's a combination of the following:

A couple hundred pounds more weight for the Sportwagen 4Motion to move. That hurts gas mileage.

The DSG trans and 6-speed manual transmissions in the 4Motion are both shorter and more closely spaced than the 5-speed manual transmission and automatic in the FWD TSI. This means on average the 4Motion is always going to be turning a higher RPM, even just cruising down the highway.

And lastly, yes, the AWD system itself hurts gas mileage.

 

[crxgator]

Is this with draggy? I seriously gotta get one if it is

Yup. Dragy is awesome. Looking back at my other times and these were a bit slower. :/


Sent from my iPhone using Tapatalk

 

[Ironshade]

Are these the MPGs you're referring to? (See the bottom of the second page):

https://newspress-vwusamedia.s3.ama...2018GolfSportWagenTechnicalSpecifications.pdf

If so, it's a combination of the following:

A couple hundred pounds more weight for the Sportwagen 4Motion to move. That hurts gas mileage.

The DSG trans and 6-speed manual transmissions in the 4Motion are both shorter and more closely spaced than the 5-speed manual transmission and automatic in the FWD TSI. This means on average the 4Motion is always going to be turning a higher RPM, even just cruising down the highway.

And lastly, yes, the AWD system itself hurts gas mileage.

They have a 6th gear final man. Pretty sure rpms similar. Differance is drivetrain loss. 25/34 vs 22/29 is a big deal. Telling you ok maybe 15% was a long shot but 10% drivetrain loss is very realistic.

 

[4MotionWagen]

Was curious. If drivetrain loss is same awd vs fwd.. wheres these big differances in mpg come from? Def not the 200lbs causing it alone

The 6 speed manual is geared lower and the DSG is geared even lower. I don’t remember the exact numbers but the 4motion wagen is geared lower than the Golf R.

Basically the GTI is geared lower than the TSI. The R is lower than the GTI and the 4motion is lower than the R.


Sent from my iPhone using Tapatalk

 

[Ironshade]

armchair racer. Any info on your s6 setup and time slips? That speedo looked much quicker then other cars on youtube. And something just dosent add up.

 

[4MotionWagen]

Was curious. If drivetrain loss is same awd vs fwd.. wheres these big differances in mpg come from? Def not the 200lbs causing it alone

They didn't have data on 4motion manual at the time I bought my car so this is what I had. The GTI falls in between the TSI and Golf R. When you multiply the ratios with the final ratio you will get overall gearing per gear and there is a good difference.


Golf R
Manual DSG
1st 3.36 2.92
2nd 2.09 1.83
3rd 1.48 1.31
4th 1.09 0.97
5th 1.10 1.04
6th 0.91 0.81
Reverse 3.99 3.26
Final I 4.24 4.77
Final II 3.27 3.44

4motion Wagen

DSG
1st 3.46
2nd 2.05
3rd 1.30
4th 0.90
5th 0.91
6th 0.76
Reverse 3.99
Final I 4.38
Final II 3.33

TSI Wagen
Manual Automatic
1st 3.78 4.46
2nd 2.12 2.51
3rd 1.27 1.56
4th 0.87 1.14
5th 0.66 0.85
6th -- 0.67
Reverse 3.60 3.19
Final 3.39 3.23

 

[Blade3562]

Scaled 2800 full tank no rear seat, 3030 with my fatass. Lol. I can't get any traction but first two passes were 110 and 109 all of that coming from the back half. It has a lottttt more to give.

 

[TwinDad]

They didn't have data on 4motion manual at the time I bought my car so this is what I had. The GTI falls in between the TSI and Golf R. When you multiply the ratios with the final ratio you will get overall gearing per gear and there is a good difference.


Golf R
Manual DSG
1st 3.36 2.92
2nd 2.09 1.83
3rd 1.48 1.31
4th 1.09 0.97
5th 1.10 1.04
6th 0.91 0.81
Reverse 3.99 3.26
Final I 4.24 4.77
Final II 3.27 3.44

4motion Wagen

DSG
1st 3.46
2nd 2.05
3rd 1.30
4th 0.90
5th 0.91
6th 0.76
Reverse 3.99
Final I 4.38
Final II 3.33

TSI Wagen
Manual Automatic
1st 3.78 4.46
2nd 2.12 2.51
3rd 1.27 1.56
4th 0.87 1.14
5th 0.66 0.85
6th -- 0.67
Reverse 3.60 3.19
Final 3.39 3.23

The 4mo tsi is only lower in 1st and second. 3rd through 6th the R gearing is lower

 

[Ironshade]

Scaled 2800 full tank no rear seat, 3030 with my fatass. Lol. I can't get any traction but first two passes were 110 and 109 all of that coming from the back half. It has a lottttt more to give.

Thats badass man! You running with asr off or esc sport? And crazy how light the 2 door is.

 

[TwinDad]

The R vs. TSI 4mo
13.9 15.15
8.72 8.97
6.24 5.69
4.62 3.94
3.57 3.03
2.78 2.53

 

[TwinDad]

Scaled 2800 full tank no rear seat, 3030 with my fatass. Lol. I can't get any traction but first two passes were 110 and 109 all of that coming from the back half. It has a lottttt more to give.

What 60' and trap.