www.tdiclub.com

Economy - Longevity - Performance
The #1 Source of TDI Information on the Web!
Forums Articles Links Meets
Orders TDI Club Cards TDIFest 2016 Gone, but not forgotten VAG-Com List Unit Conversions TDIClub Chat Thank You

Order your TDIClub merchandise and help support TDIClub


Go Back   TDIClub Forums > VW TDI Discussion Areas > TDI Fuel Economy

TDI Fuel Economy Discussions about increasing the fuel economy of your TDI engine. Non TDI related postings will be moved or removed.

Reply
 
Thread Tools
Old February 20th, 2020, 06:26   #301
JamesBa
Veteran Member
 
Join Date: Mar 2006
Location: Maryland
TDI(s): GOLF '02
Question Diesel-Hybrid

Quote:
Originally Posted by Drys View Post
I don't think a diesel-hybrid will ever make it to the states, at least.
Why not?
__________________
'02 GOLF TDI
JamesBa is offline   Reply With Quote
Old February 20th, 2020, 09:41   #302
oilhammer
Certified Volkswagen Nut Vendor
 
oilhammer's Avatar
 
Join Date: Dec 2001
Location: St Louis
Fuel Economy: fantastic
Default

Quote:
Originally Posted by JamesBa View Post
Why not?

Too expensive.

And we have at least one model sold here that was available in "regular", a diesel, and a [gasoline] hybrid: the NCS Jetta sedan.

Base price: $15k

TDI option: $22k

Hybrid option: $23k

So, theoretically, the "TDI+hybrid" would be around $30k... to start. Most would get tarted up, so would you pay for a $35k Jetta while the base model was sitting right next to it that started at $15k? I certainly wouldn't.

There was a diesel hybrid E-class sedan on display at the NAIAS a few years back. It was a Euro model, not ever sold here, although we did get the 4 cyl diesel like it had for three years. No idea what it cost, but it likely was not cheap.
__________________
oilhammer
www.cardocautomotive.com
oilhammer is offline   Reply With Quote
Old February 21st, 2020, 10:27   #303
NewTdi
Veteran Member
 
Join Date: Jan 2004
Location: NorCal
Fuel Economy: 58/46/39
Default

Just an update on my quest for achieving better FE. In the past I used to get very good economy before I started with all the mods; however even with the mods these cars have way better FE than 99% of other combustion cars on the road.

I have been testing the P&G method as described on the early pages of this thread. When on the freeway and I do a lot of freeway driving I use the following technique. I gently accelerate for 5 seconds and I glide for 7-10 seconds. I can achieve on a my local highways an average range between 55-60mpg however in the 3 miles that it takes me to go from the freeway exit to the front door of the office my mileage drops to 51mog. These values are measured by a ScanGauge which has a margin of error if 0.0xx gallons. When I fill up for example my ScaGauge will tell me that the fuel consumption for the tank was 12.5 gallons however when I do fill up the actual fuel pumped might be 12.55; I wish there was a way to add one more decimal value to the ScanGauge. I run the tires at 38psi.
My car is somewhat modded with a BG "S7" turbo, PP502 nozzles and RC3+ tune.
I just wanted to share my experience here. In the past (5+ years ago) I used to participate in the monthly mileage competition and 700 mile tanks were often achieved.
__________________
03 MK IV Sedan 349k miles - DAILY DRIVER
03 MK IV Wagon 508k miles - GONE TOO SOON
Thank you MATT for the continued car care
NewTdi is offline   Reply With Quote
Old February 21st, 2020, 14:52   #304
Lightflyer1
Veteran Member
 
Lightflyer1's Avatar
 
Join Date: Sep 2005
Location: Round Rock, Texas
Default

Driving isn't supposed to be such a chore. I am happy with the mileage I get just regular driving down the road. No way I am going to do that constantly every 15 seconds over and over again. You must want that extra economy pretty bad.
__________________
How to post pics:http://forums.tdiclub.com/showthread...t=post+picture
Lightflyer1 is offline   Reply With Quote
Old February 21st, 2020, 14:56   #305
NewTdi
Veteran Member
 
Join Date: Jan 2004
Location: NorCal
Fuel Economy: 58/46/39
Default

Quote:
Originally Posted by Lightflyer1 View Post
Driving isn't supposed to be such a chore. I am happy with the mileage I get just regular driving down the road. No way I am going to do that constantly every 15 seconds over and over again. You must want that extra economy pretty bad.
After a while it becomes second nature and to some degree I agree with you, get in the car and drive/go. Bit I am glad to get those extra 3-5mpg without much effot.
__________________
03 MK IV Sedan 349k miles - DAILY DRIVER
03 MK IV Wagon 508k miles - GONE TOO SOON
Thank you MATT for the continued car care
NewTdi is offline   Reply With Quote
Old February 27th, 2020, 07:18   #306
Cbus27
Newbie
 
Join Date: Feb 2020
Location: PA
Default Upgrades for fuel economy?

Hello,

This is the first time posting anything so forgive me if it’s not correct area or not enough info. I have a 2002 Jetta ALH w/ 5 spd manual and it’s stock. It has 297k miles and the turbo is about ready to go. I’m getting High boost PSI faults so I assume the VGT is sticking on turbo. I also assume it’s leaking a little oil which is common for the mileage and age.

I will be driving 115 miles all highway one way starting this summer 5 days a week. I am currently getting 43 mpg.

I contacted KermaTDI about a new turbo they suggested VN-17, new injectors 520 and a tune. I was quoted $2k for everything I need. I told them I wasn’t looking for a lot of power over stock but an increase in mpg or at least stay with what I’m getting now.

My question has anyone do this upgrade ? What mpg gain if any did you see ? Is it worth putting $2k into a 300k car. Mechanical it’s a great car and the body is good. Interior is excellent. I will just be using it to commute. I only paid $300 for the car and have put 15k miles on it already.

Thanks in advance.

Last edited by Cbus27; February 27th, 2020 at 07:20. Reason: Miss spelling
Cbus27 is offline   Reply With Quote
Old February 27th, 2020, 07:44   #307
Lightflyer1
Veteran Member
 
Lightflyer1's Avatar
 
Join Date: Sep 2005
Location: Round Rock, Texas
Default

I would find the trusted mechanics list here and find someone close to you and have the car evaluated first. IDparts has a reman stock turbo for $529 if needed.

https://www.idparts.com/vnt-15-turbo...an-p-4608.html

I would skip the tune and injectors and just do a dieselpurge instead.

http://forums.tdiclub.com/showthread...t=diesel+purge

You will never recoup the money spent for the tune and injectors from fuel savings. So don't do that unless you really need new injectors and want a tune. Stick with what is needed to run. If you can do your own work you should be able to keep it under $1k easily.

I would just keep it stock and get it in the best shape you can. You may not even need a turbo just yet. You have a number of trusted mechanics around you there.

https://www.google.com/maps/d/viewer...10828396875002
__________________
How to post pics:http://forums.tdiclub.com/showthread...t=post+picture

Last edited by Lightflyer1; February 27th, 2020 at 07:47.
Lightflyer1 is offline   Reply With Quote
Old February 27th, 2020, 08:07   #308
Cbus27
Newbie
 
Join Date: Feb 2020
Location: PA
Default

I did a Moly diesel Purge back when I purchased the car. I have a lift and my good friend and I own 6 VW’s between the 2 of us. The labor will cost me nothing and I understand I will never recoup the actual $2k investment. Just wanted to know if anybody has replaced all these ? If there are any other better options out there ? I understand KermaTDI is a good company but as with any good salesman they push their products because the are in the business to make money.
Cbus27 is offline   Reply With Quote
Old February 27th, 2020, 08:31   #309
Lightflyer1
Veteran Member
 
Lightflyer1's Avatar
 
Join Date: Sep 2005
Location: Round Rock, Texas
Default

That is probably about what you should expect to spend no matter who you got this stuff from. Tune, injectors and turbo. Just from my reading here and experience.
__________________
How to post pics:http://forums.tdiclub.com/showthread...t=post+picture
Lightflyer1 is offline   Reply With Quote
Old February 27th, 2020, 08:33   #310
Cbus27
Newbie
 
Join Date: Feb 2020
Location: PA
Default

Well thank you all for the replys. I have some thinking to do. I plan on keeping car till I can’t fix it anymore
Cbus27 is offline   Reply With Quote
Old February 28th, 2020, 08:09   #311
Cbus27
Newbie
 
Join Date: Feb 2020
Location: PA
Default

I have another question. If I up grade just the turbo to a VN-17 and the MAP sensor will I need a tune so it doesn’t over boost since it’s a larger turbo than what is on the car already
Cbus27 is offline   Reply With Quote
Old February 28th, 2020, 08:47   #312
amit9
Veteran Member
 
amit9's Avatar
 
Join Date: Oct 2004
Location: Toronto/Scarborough
Default

Check/Lube the lever on the VNT actuator arm, it helped restoring some power in my case.
Refer to: https://www.myturbodiesel.com/pages/tdi-wiki/
"VNT turbo actuator adjustment and repair/replacement on TDI engine-mk4"

Bigger turbo/Injectors/Tunes are all desirable upgrades, and as Lightflyer1 said, their costs will never be recouped.

Check/Clean the EGR valve and the intake manifold. At this age and mileage, those are probably clogged. Cleaning them is not much cost assuming you're DIY, and will give you some mpg increase.
Check/Adjust the rear brake parking cables, if the wheels are not rotating freely. The MK4 rear wheels are highly prone to sticking/dragging, and will lower the mpg.
Check all vacuum lines.

Quote:
Originally Posted by Cbus27 View Post
Hello,

This is the first time posting anything so forgive me if it’s not correct area or not enough info. I have a 2002 Jetta ALH w/ 5 spd manual and it’s stock. It has 297k miles and the turbo is about ready to go. I’m getting High boost PSI faults so I assume the VGT is sticking on turbo. I also assume it’s leaking a little oil which is common for the mileage and age.

I will be driving 115 miles all highway one way starting this summer 5 days a week. I am currently getting 43 mpg.

I contacted KermaTDI about a new turbo they suggested VN-17, new injectors 520 and a tune. I was quoted $2k for everything I need. I told them I wasn’t looking for a lot of power over stock but an increase in mpg or at least stay with what I’m getting now.

My question has anyone do this upgrade ? What mpg gain if any did you see ? Is it worth putting $2k into a 300k car. Mechanical it’s a great car and the body is good. Interior is excellent. I will just be using it to commute. I only paid $300 for the car and have put 15k miles on it already.

Thanks in advance.
__________________
2003 GLS "SilverJet" TDI, Zerostart 1000W, Defender-Tech skidplate version 2
amit9 is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 3 (0 members and 3 guests)
 
Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Newbies and Vets: Tips for better fuel economy! BleachedBora TDI Fuel Economy 952 June 20th, 2019 08:24
Fuel Economy Tips Ric Woodruff TDI Fuel Economy 25 December 6th, 2012 08:22
2010 Fuel economy tips HansenTDI TDI Fuel Economy 8 December 30th, 2010 06:40
Fuel Economy tips from VW amorfeusz TDI Fuel Economy 40 August 15th, 2004 12:10
Economy Tips valois TDI Fuel Economy 17 February 23rd, 2000 06:09


All times are GMT -7. The time now is 01:50.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2020, Jelsoft Enterprises Ltd.
Copyright - TDIClub Online LTD - 2017
Contact Us | Privacy Statement | Forum Rules | Disclaimer
TDIClub Online Ltd (TDIClub.com) is not affiliated with the VWoA or VWAG and is supported by contributions from viewers like you.
1996 - 2017, All Rights Reserved
Page generated in 0.15189 seconds with 12 queries
[Output: 116.04 Kb. compressed to 98.38 Kb. by saving 17.67 Kb. (15.22%)]