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Old December 6th, 2008, 07:25   #1
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Default ALH vs BEW

What is the difference between the ALH engine and the BEW engine
Thanks
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Old December 6th, 2008, 07:29   #2
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10 Horse power, 22 Lb/Ft and a very different torque curve.

And the fuel system.
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Old December 6th, 2008, 07:36   #3
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I am driving a Jetta 2002 TDI, how can I know witch one I have?
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Old December 6th, 2008, 07:36   #4
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ALH is a VE-type Bosch DFI system, EDC15.

BEW is a PD-type Bosch DFI system, EDC16.

ALH has 90hp, BEW has 100.

ALH has 155tq, BEW has 177.

ALH gets bolted to a rando-fail 01M (4 speed) slushbox option.

BEW gets bolted to a Jatco 09A (5 speed) slushbox option.

ALH requires 505.00 oil.

BEW requires 505.01 oil.

BEW has a sturdier crank and rods, and camshaft driven higher pressure injectors. ALH still uses an injection pump.
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Old December 6th, 2008, 07:37   #5
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BEW replaced the ALH in North America for the 2004 model year. 2002 has an ALH.
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Old December 6th, 2008, 07:39   #6
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Super, thanks oilhammer!!
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Old December 6th, 2008, 07:45   #7
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Rando-fail? Is that a VW Copyrighted name?
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Old December 6th, 2008, 11:06   #8
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Quote:
Originally Posted by whitedog
Rando-fail? Is that a VW Copyrighted name?
I don't thinks so. Its a common feature on many cars these days.
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Old December 6th, 2008, 16:21   #9
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Quote:
Originally Posted by whitedog
Rando-fail? Is that a VW Copyrighted name?
No of course not. This is a German car. It would be called 'Failtronic'.
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Old December 6th, 2008, 16:34   #10
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Quote:
Originally Posted by oilhammer
BEW has a sturdier crank and rods
Are the crank and rods dimensionally the same between the two (or in other words, if one were building an ALH would he want to use those BEW parts)?

Also, could somebody post dyno charts showing the difference between the ALH and BEW torque curves?
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Old December 6th, 2008, 16:42   #11
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The BEW (as all PDs) have larger rod bearing (fatter) journals at the crank. The ALH still uses the thinner 028 style rods like the AHU used.
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Old December 7th, 2008, 07:39   #12
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Default So if I want a car to Build!

Which of these is the best for a buildup? Someone said ALH, but the BEW looks better. Is it just cause the ALH was here longer - more parts available, etc.
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Old December 7th, 2008, 08:44   #13
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The ALH is simpler and cheaper to build up, and possibly more has been done with them already. Pretty much no surprises there.

However the BEW clearly has more potential for power. It has a factory 150hp sibling sold in Europe. The highest factory output VE engine is only 110hp IIRC.

While the BEW's lower end is certainly sturdier, it is not a common occurrence for ALH rods, even on heavily modded engines, to fail. They are still quite robust.

There have been talks of putting an ALH head on a BEW block, so you could get the benefits of the PD's sturdier lower end.

Really the issue comes to how much fuel you can get in and atomized correctly. Since the PD's DFI system injects fuel at a MUCH higher pressure, and can deliver WAY more fuel than the engine can burn, it would seem clear the power potential of the BEW is much higher. But as of right now, I am not sure what all turbochargers are available for the BEW whereas the ALH has all kinds of stuff available.
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Old December 7th, 2008, 09:11   #14
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Modding an ALH vs a BEW, eh? Nothing like a loaded question...

you're going to get strong opinions on both sides of the fence.

I have a BEW (significantly modded, as you can see below). There are pros and cons to both. In its most extreme modified state (guys over in Europe can attest to this a bit better), the PD's can easily be modified well over 200hp.

Not sure which to recommend to you, because it's mainly a factor of how far you intend to go. I will say though, if you're only looking for a moderate bump in power, it's easier to start with a PD. With a reflash alone, you're looking at a 30-40% power increase, with no other mods. On an ALH, you'll need to reflash as well as upgrade the injector nozzles.

Upgraded turbos: available for both the ALH and the BEW.

Injectors: readily available for the ALH, are relatively inexpensive, however are going to be necessary fairly soon in the mod stages of the engine.
Injectors for the BEW are available, however are *very* expensive (well over $1500 for a set new last I checked) - but are really only necessary on the BEW if you plan on going over about 160hp. Stock BEW injectors are very robust.

Exhaust and Intercooler mods are essentially the same for both cars.

Air intake - The BEW has a better intake pipe. Some ALH owners actually upgrade to the BEW intake piping. You wouldn't really need to modify it on the BEW (I'm a bit over 160/280 and I'm running the stock one.)

Fueling: BEW's are equipped stock with a lift pump located in the fuel tank. some ALH owners choose to install these in their cars, as it reduces stress on the traditional injector pump. At high mod levels, it can help the ALH injector pumps deliver additional fuel. (BEW doesn't have a traditional injector pump, instead has a tandem fuel pump supplying the injector rails).

Before someone jumps on me, I'll be fair - there are a couple "cons" to the BEW in the eyes of some people: You need to be careful that only specific oils are used (VW 505.01 oil requirement). Before someone chimes in and whines about the oil requirement, it's READILY available online (tdiparts, boraparts, worldimpex to name a few). There's also been TONS of discussion due to lifters (and corresponding cam wear) on these cars - some BEW's in 04's and 05's have lifters which aren't quite up to the task at high mileages.. this is one of the main reasons for the oil specification, and these parts have since been redesigned. I'm not all that worried about it personally, if you're spending $$$$ on mods, another couple hundred to replace a set of lifters (worst case scenario) at a timing belt interval isn't the end of the world in comparison.

I'm sure there is stuff I've overlooked, but those were the most important things that come to mind immediately. Others can feel free to chime in.

If it were me, I'd go with the BEW. Just make sure it's been properly maintained (specifically WRT (1) the oil requirements, (2) proper fuel having been used - i.e. if you're looking to build one up, especially avoid a car that's run grease, (3) timing belts (if applicable) done properly, by someone qualified with proper tools, and on schedule). Mods for the BEW will cost a bit more, but there's more potential in that engine, IMO. Couple that with the fact that it has a stronger bottom end, and it really makes it a no-brainer. The ALH gives you a touch more of a kick-in-the-arse feeling down low and can make a bit more torque. The BEW's strong point is that it's easier to make bigger HP higher in the rev band.

Like I said, it all depends on how far you're willing to go with it and what you're ultimately looking for.

... Just my $0.02
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Old December 7th, 2008, 10:34   #15
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Thanks:

Thats a good start.

1. What about propane injection.

2. Is it impossible to adapt to different injectors? There's a ton of em out there and surely there's something that will fit. Doesn't VW use an off the shelf type of injector? Has this been researched? Wait I'll check.
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