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Vendor & GroupBuy items for sale VW TDI/Diesel related items for sale by vendors and Groupbuys. The only commercial posts to these forums are that of Vendors with TDI related equipment. To start a post, you must be a Registered Vendor. You may periodically post a note about products you may have for sale/services so long you indicate clearly you are from the company selling these products/services. The right to discontinue this practice & remove excessive posts remains with the operators of TDIClub. Please note there is also a webpage of TDI Vendors" Group-buys are permited if sponsored by a registered vendor.

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Old April 20th, 2011, 11:36   #1
Mark@MaloneTuning
 
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Default Stage 0 Tune Now Available (Natural Aspiration)

The Stage 0 "SDI" tune is designed for VE and PD TDIs without boost (no turbocharger). We have tuned a MK4 Golf ALH without a turbocharger and it surprisingly keeps up with traffic. No smoke according to the rear view mirror!

The tune appeals to any of the following:
  • Industrial applications.
  • Simple engine swaps.
  • Those who want a potentially lower cost alternative to replacing the turbo.

EDC16 PD engines: The fault code / limp mode associated with a deleted PD VNT "smart actuator" is completely eliminated.

A different exhaust manifold is needed after turbo removal. Stock or aftermarket 4-in-1 exhaust headers for 2.0L gas engines will fit the 1.9L TDI. An air intake from a NA VW is also needed.
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Old April 20th, 2011, 13:00   #2
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Hmm. Could be interesting for people going for max longevity. Doing it right would involve a trans from a 1.8T, to get optimal gearing (code EHA looks about right for gearing), though, IMO.

It'd be interesting to see that on a dyno, and then compare to dyno results from a stock AQM (the factory 1.9 SDI).

(Not interested in it myself, but it's still interesting.)
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Old April 20th, 2011, 15:30   #3
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That is an interesting development, and I'd love to hear feedback from someone who has reverted to "SDI" in this manner!

I think the P-D version of SDI had something like 68 horsepower stock, and it's possible to get a bit more by chip-tuning them.
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Old April 20th, 2011, 20:07   #4
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what do you think would be the mpg change? i'm sure it's take a while to get up to speed, but maybe it would be worth it at the pump?
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Old April 20th, 2011, 21:12   #5
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Would it really be any more efficient to accelerate a weaker "SDI" car to speed (more effort) than gingerly accelerating a more powerful TDIl? I'm not sure I understand why anyone would want to do this.
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Old April 20th, 2011, 21:30   #6
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I thought I had read that turbochargers cost some amount of power to make power. And isn't fuel supposed to burn more efficiently at a higher load? Perhaps it's possible to advance timing further if there is no boost?

Even if it's not more efficient, I can still see some potential for this modification for anyone with a blown turbo who wants to get back on the road cheap. Good thinking!
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Old April 20th, 2011, 22:21   #7
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hmm, is there anything you can do to make the cruise control react slower to acceleration ?
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Old April 21st, 2011, 06:24   #8
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Quote:
Originally Posted by Stealth TDI View Post
Would it really be any more efficient to accelerate a weaker "SDI" car to speed (more effort) than gingerly accelerating a more powerful TDIl? I'm not sure I understand why anyone would want to do this.
Well, the SDI will just have less maximum power than the TDI - it shouldn't overfuel, so it should be about as efficient as a TDI that's accelerating as hard as the SDI is.

(Now, the TDI can accelerate harder. That's the advantage of the TDI.)

The biggest reason to do it has little to do with efficiency, and everything to do with increasing longevity (with no turbo, cylinder pressures are lower, the vanes can't soot up, and the turbo can't blow and dump oil into the intake) and reducing costs if you're an absolute cheapass.

That said, there is a way that an SDI can be more efficient than a TDI. The most efficient modes of operation for the TDI engine are ones in which the turbo can potentially surge, and where the turbo will get sooted up, and therefore those modes of operation are essentially off-limits. An SDI, with no turbo, has no such problems, and therefore is perfectly happy at 1500 RPM.
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Old April 21st, 2011, 07:32   #9
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Look out smart and electric cars! Wicked idea.
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Old April 21st, 2011, 11:37   #10
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Weren't the first VW diesels NA and didn't they smoke like crazy?
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Old April 21st, 2011, 11:42   #11
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abc- I wouldn't say they smoked 'like crazy' but they did make some smoke. They also had relatively primitive fuel injection systems. Unlike the MK4, those early injection pumps were fully mechanical. The point here is that software tuning can produce clean power without turbocharging in the 1.9 It's wonderful that we have access to this setup for many reasnos, but it's not a big surprise- I believe NA direct injection was a stock option in Europe.
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Old April 21st, 2011, 12:08   #12
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They only smoke like crazy when they're not running properly. And, the engine management consists of a bunch of springs, weights, and camplates, that translate RPMs and throttle position into fuel quantity and timing. Note that air isn't take into account.
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Old April 21st, 2011, 12:28   #13
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This is fantastic! I fall into the cheap-ass category with interests in longevity and economy. Sounds like a great alternative to replacing a failed turbo. I have replaced two VNT actuators and one N75 valve allready for a combined total of maybe $400 with shipping to Canada. How much would it cost to delete the turbo? Who will be the first to put together a Turbo Delete Kit for the ALH and price to compete with a replacement VNT15? Very interesting.

Also how is the real world fuel economy on this SDI ALH? What does SDI stand for exactly now?
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Old April 21st, 2011, 12:34   #14
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Someone should just make cartridge block off plates, leave the turbo manifold there, just take out the cartridge, block it and leave the downpipe there
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Old April 21st, 2011, 12:44   #15
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Quote:
Originally Posted by JFettig View Post
Someone should just make cartridge block off plates, leave the turbo manifold there, just take out the cartridge, block it and leave the downpipe there
If I have this correct, the cartridge is the center part with the oil feed and the moving parts? This is a great idea!
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