1.9 ALH In a boat

Roost

Active member
Joined
Mar 4, 2019
Location
BC
TDI
1.9 alh
Ive been tossing around the idea to convert this thing to M-tdi.


I have acquired this mechanical IP pump off what is said to be "Out of a 93 Passat 1.9L TDI". I'm not certain if this pump could work or not, from what I can tell it's 9mm plunger?


As far as the project as a whole no real progress. I'll have time this winter to get things rolling. Also pleased to find out "tdconversions" adapters is a hour drive away from me.



 

Roost

Active member
Joined
Mar 4, 2019
Location
BC
TDI
1.9 alh
Looks like I have some cleaning to do.. Wont miss the egr system.

I went ahead and bought one of those cheap mini lathes. It ends up being cheaper then buying a adapter and Ill be able to use it for other parts of the project. Dial indicating engine plate madness to come..


As for the AAZ pump I have I will either attempt to convert it or send it to Giles.





 

Roost

Active member
Joined
Mar 4, 2019
Location
BC
TDI
1.9 alh
Little bit of progress. Turning a piece of steel this size on a china mini lathe didn't exactly go well, burnt up the motor controller and later the motor..

Just need to drill the holes now. Everything is hub centric.


web ho


web ho


web ho
 

PickleRick

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Joined
Nov 29, 2017
Location
Greenville sc
TDI
05 GLS BHW sedan 5 speed conversion. BHW Carver SantaCruz in progress
That's a sweet build.

Ive found newer marine tdi factory mercruiser parts. Used is rare. They made the new tdi 3.0 and 4.2 in marine versions after the cummins marriage with Mercury fell apart. I have a cummins bagded 4.2 inline 6 that is a VM diesel. Italian designed Belgium built. The small 1.7 that came pared to the alpha was an isuzu but i cannot remember if it was badged cummins or VW.


The 3.0 and 4.2 packages start around 30 to 40k.
 

Roost

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Joined
Mar 4, 2019
Location
BC
TDI
1.9 alh
4.2 would be a nice package. When I was young my dad had a i6 volvo penta with dual prop, no problem at all pushing a heavy welded aluminum out of the water.
The 1.7 ive heard have a bad rep, at 120hp I guess they wern't built tough enough for constant load.
 

PickleRick

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Joined
Nov 29, 2017
Location
Greenville sc
TDI
05 GLS BHW sedan 5 speed conversion. BHW Carver SantaCruz in progress
I dont know much about the 1.7s other than they netted good fuel savings.

120 hp is good so long as its in a boat small enough that the motor can still reach max rpm when loaded down with peoele/food/drinks/gear.

Diesels have torque that gassers need much more displacement to match.

But not many diesels like max throttle for hours on end.
 

Roost

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Joined
Mar 4, 2019
Location
BC
TDI
1.9 alh
Yeah I think it's one thing for a jet boat to have a laggy setup, jets don't bite the water like a prop. I'm wanting to maintain decent bottom end the for when the boat is loaded with people/fishing gear so it still gets out of the hole. Realistically 120hp is enough for this boat.
 

Roost

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Joined
Mar 4, 2019
Location
BC
TDI
1.9 alh
I'm still leaning towards mtdi. I have all the electronics and engine harness but this is a ocean boat, a failed senor could leave me in a bad position. I would like to maintain a vgt turbo depending if I can reliably control it. Still more research to do in that rearguard.
 

PickleRick

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Joined
Nov 29, 2017
Location
Greenville sc
TDI
05 GLS BHW sedan 5 speed conversion. BHW Carver SantaCruz in progress
The tune on the ecu will get rid of many sensors. The relays/sensors you would need spares of could fit in a tackle box.
 

Roost

Active member
Joined
Mar 4, 2019
Location
BC
TDI
1.9 alh
I don't doubt reliability could obtained with the e setup. Diagnosing and changing sensors in weather wouldn't be something I would want to do, things go bad at the worst time it seems. I always have a kicker but that wouldn't saftly get me back across the Georgia straight.

Still undecided however most my vehicles mechanical, I just prefer it that way.
 

PickleRick

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Joined
Nov 29, 2017
Location
Greenville sc
TDI
05 GLS BHW sedan 5 speed conversion. BHW Carver SantaCruz in progress
I work on quite a few diesels, many times the obd system makes diagnosing issues a little quicker than mechanical.

I also find electric controlled diesels smoother and often more economical.

That being said, if m-tdi is easier for you it makes no sense to keep electronic. Ive yet to find a boat break down convenient. Even if just a leaky water faucet.
 

Theterror

New member
Joined
Oct 8, 2020
Location
Manitoba Canada
TDI
2001 automatic
What did you figure out with the cooled exhaust side? I just got a 01 Alh I wanna put into a alpha one drive, but I'm looking at doing it on an aluminum boat.
 

PickleRick

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Nov 29, 2017
Location
Greenville sc
TDI
05 GLS BHW sedan 5 speed conversion. BHW Carver SantaCruz in progress
Does the aluminum boat have an enclosed engine hatch or is it open? If open you won't need to worry about cooled exhaust,
 

PickleRick

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Nov 29, 2017
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Greenville sc
TDI
05 GLS BHW sedan 5 speed conversion. BHW Carver SantaCruz in progress
Enough ventilation could take care of it. It will be trial and error but that's the set up I've been brain storming. I was thinking big turbo with lots of boost to keep egts down.

There was a gap in time lines when vw/mercruiser and cummins/mercruiser both provided marine diesels, they did have some 120 to 170 hp inline 4 cyl motors attached to alpha 1

As far as I know those were rebadged isuzu motors with less than stellar reputations. Many people ran these motors wot everywhere which probably had a hand in. building that reputation. The rebadging is no new concept, they marketed my VM as a cummins....a cummins it 100% is not. I have 3 independent cylinder heads on this inline 6. I think vm produced a 4 cyl either 3.0 or 2.5 or both engine as well.

If anyone has any more into on 4 cyl vw diesels begin used between the late 90s to today in factory marine applications that could give us a good deal of info and possibly access to n.o.s. inventory.

I searched part numbers for the v6 and v8 tdi motors used in recent years by mercruiser, some of the part numbers to the marine manifold, cross over tubes, exhaust pipes and turbos are now listed as OBS or NLA.

Some of what i found suggested dieselgate pushed VW to bail on the marine division.
 
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Dannyboy

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May 25, 2013
Location
Mb
TDI
2014
Several versions are used in forklifts too. Rotary, PD and common rails. Harness is a bit easier and simpler
 

CasaEd

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Mar 18, 2017
Location
Portugal
TDI
VW Passat TDi B4, VW Passat TDi B4 GL, VW Passat B3 PD AWX Conversion
If you're thinking of going M-Tdi I'd throw that 1.9 TD pump in the bin and source yourself a Landrover 200 or 300 tdi injector pump, comes as standard with an 11mm head , more or less plug and play.
 

Theterror

New member
Joined
Oct 8, 2020
Location
Manitoba Canada
TDI
2001 automatic
I have found a boat, it's aluminum, and a old mc1 drive (very similar to the alpha one) as far as adapting the motor is easy, the old engine was a Chevy bolt pattern (lots of adapters for those),

Also the motor is a 1.9 Alh from and auto, 11mm pump

my biggest thing now is to try and find a turbo and injectors that I wanna use, I'm looking for around 160-170hp (needs to be reliable and run cool) want to make a water cooled exhaust manifold, I feel like that's my best option for safety reasons, was kinda looking at gtb2056vl because there water cooled (get as much heat out as possible). Anyone run one of these good bad? Would need to spool reasonably quick but I want to stay mostly stock with the remainder of the engine.

Would really need to keep my egts down during plane, around 2500-3500rpm, was thinking of uping the oil pressure just for reliability sake

Any thoughts?
 
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