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Old May 20th, 2017, 12:04   #181
Owain@malonetuning
 
Join Date: Jul 2016
Location: Vancouver
TDI(s): PD wagon
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Thank you Brian for the non stop knowledge and real world experience.

Speaking of high pressure fuel pump failures and soft camshafts... how about that freevalve tech progression?

https://www.youtube.com/watch?v=S3cF...annel=%2FDRIVE

Qoros, a Chinese manufacturer, is currently testing a camless motor in their 3-hatchback. Traditionally it's a port injected 1.6T 16V with 160HP/175lb-ft. Koenigsegg is claiming a ~45% power and torque increase, 15% fuel economy, and 35% fewer emissions (mostly due to cold start improvements). They currently have 150K/yr production and are well underway testing this system. Many companies have looked into this extensively but other than fiat we haven't really seen much in terms of weird valve designs in mass produced vehicles.

The valves can be controlled individually and infinitely, it has 8 inlet and 8 exhaust port.
- No need for a wastegate as 4 exhaust outlets don't enter the turbo, so those four valves can be opened more as needed
- No need for a throttle body
- No need for a cam/HPFP assembly
- The pre-cat converter can be removed, since the exhaust can be heated much faster and most pollution occurs during cold starts
- The entire engine assembly is approx 15kg lighter, 50mm shorter, 70mm shorter and narrower in this application.
- You could probably run a single drive belt
- Square valve profile race use
- Raised CR from 9 to 12:1
motors don't need to get any smaller, they need to get smarter first. Part of that is with simplicity, HPFP failures cost more than a mk4 tdi typically and walnut blasting isn't fun. Twin injection is a good start. Hopefully this will get a running shot against those dull hybrids. With VGTs and plasma ignition this should see 50+MPG easily, just a matter of getting the price down.
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Last edited by Owain@malonetuning; May 21st, 2017 at 02:03.
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Old Yesterday, 10:34   #182
tikal
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Location: Southeast Texas
Fuel Economy: 37 MPG (~ 45% city)
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Quote:
Originally Posted by oilhammer View Post
The BPY for whatever reason was never as bad about gunking as the CCTA. etc. engines. Other than some pretty abysmal oil consumption, and some HPFP cam follower failures, the BPY was (is) a pretty good engine.

There may be a link between the cam/follower failure and constantly running low on a oil, too. Not to mention so many people using the wrong oil.

One of my customers has a 2007 GTI, and he bought it new, which was early on but already we knew about the BPY's appetite for oil. I gave him strict warnings about this, armed him with an extra 5L jug of oil after each service to take with him. And 200k+ miles later, it still runs like a top, and it still uses every bit of that extra 5L of 502.00 spec 5w40 between its 10k mile oil changes... same as it did when new. And I have never done a single thing to that engine besides spark plugs, coils (of course ) and scheduled timing belts. That's it. Cam, follower, HPFP, etc. all original. It is starting to get some seepage at the rear chain cover, which is not a big deal to fix on the transverse applications... the longitudinal ones are a bit trickier.
This is where the Renewable Lubricants oil would come handy (instead of VW 502):

http://renewablelube.com/files/8914/...tor_Oil_LA.pdf

https://www.bobistheoilguy.com/forum...21#Post1173819
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Old Yesterday, 12:21   #183
atc98002
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I don't give a hoot about engine sizing, up or down. Give me my diesel back!
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Old Yesterday, 17:22   #184
POWERSTROKE
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My bet is passenger diesels will be eliminated from the US market eventually.
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Old Yesterday, 18:04   #185
PlaneCrazy
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Fuel Economy: Passat 7 L/100 km Golf Wagon 4.8 L/100 km avg, Golf TSI 6.0 L/100 km avg (summer)
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Quote:
Originally Posted by POWERSTROKE View Post
My bet is passenger diesels will be eliminated from the US market eventually.
Not just the US, they're attracting more and more attention in Europe as well. Attention of the negative kind.

I've given up on them for N. America, the Rube Goldberg plumbing required to make the cheat... er... pass emissions is just a maintenance nightmare. With gas engines getting better, the added cost just won't be worth it. My 1.8 TSI averages exactly 1.0 L/100 km more than my previous TDI, and right now diesel is 3 cents more per litre than RUG where I live, and was much more than that over the winter.

Now FCA is in trouble for the cheating with their diesels on the RAM and Grand Cherokee.

It was fun while it lasted...
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Old Yesterday, 20:03   #186
atc98002
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Fingers crossed that Mazda still brings the CX-5 diesel to the US. And the Traverse is still supposed to be coming. But I have a hunch a hybrid will be in my future. The new Tiguan coming this summer with the powertrain from the Jetta Hybrid would be nice. I was quite impressed when I drove a Jetta (admittedly a short drive).
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