who on here has an AAZ 1.9 turbo diesel engine?

Post by **quiksilver_jake** » 04 Feb 2006, 22:59

hello, after my 1.6 d packed in , in august i looked about and opted for aaz 19td from a seat , im running the original 4 speed and 17 inch wheels on the rear are 10mm taller than the front (tyres) , i enjoy it up to 65? it is fast to there tho! and it now has from today day a 60mm drop (wish id gone for 70mm)
what are you running your with and whats it like? thanks

Post by **philippacman** » 27 Feb 2006, 20:16

hi there im running a golf 1.9 TDI 5 speed g/box, 18inch alloys. fast as you like up to 60 then dies off a bit. i think it is the fuel pump as it is a manual cable hybrid conversion. im going to rewire to original fly by wire as soon as i get chance, also just done a 1.9td aaz conversion on my mates van he is running 18,s to but 4 speed box, slower take off and dies off slightly at 65,going to tune it a bit got some boost pins for the injection pump so we,ll see how that goes again as soon as i get chance. the AAZ is a good easy conversion as long as you have an orginal 1.6D engine for all the nessesary bits.

Post by **HarryMann** » 04 Mar 2006, 10:01

AAZ on a syncro Doka with 5.43 diff and 15" wheels with big knobbly Machos. Will cruise at 70 (about 3800) and go beyond that. Turbo a bit duff, being replaced, so hoping for more puff when cruising at 70 up Mway inclines - wheel/tyre change definitely taxed it at the top end, noticed lack of puff then, but 'tis draggy with those big Machos and a 4WD to drag around.

Pulls extremely well in gears on cold summer evenings, and before engine fully warms up - this indicates to me an intercooler is really needed. Making some mods to keep reflect heat away from compressor section and oil feed pipe - runs very close to a large chunk of red hot iron!

The large plastic pipe from compressor outlet to inlet manifold should have at least some of that shiny ally concertina insulation around it, originally had that with asbestos inside it too... so it's needed to keep charge air cool as it runs back up past exhaust.

Post by **Cate** » 04 Mar 2006, 16:52

Syncro doka with a 1.9td from a Seat Toledo, currently not running at all, at the workshop getting bores and rings checked out.

Post by **andylen** » 05 Mar 2006, 19:32

I process of fitting one on a syncro petrol.
Have just ditched fuel tank as starter was in the way.
It should be running soon.
Trying to find intercooler and where to put it though.

Post by **Diamond Hell** » 05 Mar 2006, 19:44

Trying to find intercooler and where to put it though.

Golf MKII GTD intercooler, not the biggest, but has in/out on the same end and fits in the rear quarter, neatly out of the way and can be cooled using the fan off a motorbike.

Anonymous · Post by **Anonymous** » 14 Mar 2006, 08:06

Andy and Harryman,
Look into Charge Coolers. Much more efficient on a Type 25 than an intercooler due to restrictions of where to put it.

You can usually get complete setups on ebay for sensible money.

I'm running a 2 core Pace charge cooler on the Harlequin with the 2.5 TDi, works great.

MG

Link
http://cgi.ebay.co.uk/cosworth-pace-cha ... dZViewItem

http://cgi.ebay.co.uk/VW-GOLF-G60-CHARG ... dZViewItem

Post by **HarryMann** » 14 Mar 2006, 10:11

Michael,

I do have a rather large intercooler, far too large to find anywhere to fit it yet, would get written off if I fit it where it was originally, forward of the rear cross-member and without cutting it up, cannot see it going in the rear quarter either. So might sell it to someone with a 2WD AAZ, but it'll not be cheap; big, efficient and long pipes.

As for charge coolers, I really can't see how this naming distinction has come about, either the charge air is cooled or it isn't - was going to look into a water-cooled intercooler kit. However, I like the way that the compressor outlet currently takes a very short run up to the inlet manifold, which is insulated from the surrounding heat, to an extent.

Post by **andysimpson** » 14 Mar 2006, 21:18

Charge coolers make intercoolers look useless, i have a pace 4 core that will be going on mine when engine is in. I had this cooler on a quick beetle the pipe from turbo to cooler was always way to hot to hold, the pipe out of cooler was just like touching the roof of the car.

The advantage is charge coolers take a while to get hot (much more mass) so temps are more stable, rad can be placed with a good airflow.

The disadvantge of inter coolers is they got hot very quick, temps are very eratic due to limited airflow, if there is any in a rear engined vehicle.

Post by **HarryMann** » 14 Mar 2006, 22:25

Nah, they're the same thing, just silly marketing...

Air ~ water intercoolers were on aircraft in 1940 or earlier, they were called intercoolers because that's what they do, cool the air between two compression stages, either between two stage supercharging or a single stage supercharger and an engine, which itself is a compressor...

AFAIK - it's the fact that air-air intercoolers became the norm on cars, and now in difficult situations they are using air-water intercoolers that has created this new terminology - either its an intercooler or its not, and they all are doing the same job... intercooling

Smart re-naming makes me spit, when we already have a name, which is much more descriptive than the new one, it's all 'spin' and just confuses

Post by **Simon Baxter** » 15 Mar 2006, 10:29

Charge cooler is what people know them by, and it's easier to say that than "air to water intercooler"

This could be the T3 - Type25 *spit* thing all over again.
Totally understand where your coming from though.

Post by **HarryMann** » 15 Mar 2006, 11:17

Right, thanks, at least I know the story now...

IMHO, easier to say but confuses little grey cells like mine

Post by **andysimpson** » 15 Mar 2006, 21:42

HarryMann wrote:Nah, they're the same thing, just silly marketing...

Air ~ water intercoolers were on aircraft in 1940 or earlier, they were called intercoolers because that's what they do, cool the air between two compression stages, either between two stage supercharging or a single stage supercharger and an engine, which itself is a compressor...

AFAIK - it's the fact that air-air intercoolers became the norm on cars, and now in difficult situations they are using air-water intercoolers that has created this new terminology - either its an intercooler or its not, and they all are doing the same job... intercooling

Smart re-naming makes me spit, when we already have a name, which is much more descriptive than the new one, it's all 'spin' and just confuses

I agree they do the same job, but for vehicles such as t3's the water one has a major advantge in that rad can be positioned where it will get a decent air flow which is something not possible with an air to air.

Post by **HarryMann** » 15 Mar 2006, 22:25

I have the feeling, as it sounds you do too, that it would need an exceptional installation to achieve much with a small air~air at the back of the T25, and have expressed as much before. And some, with pumping losses taken into account, zero or negative. But having been an engineer once upon a life, always happy to be proved wrong...

if the evidence is compelling

The massive air~air I mistakenly 'inherited' with my DoKa, is another matter... sling that under the vehicle and you'd get a goodly density increase and useful drop in intake temperature. Unfortuntaley, i can't though.. but on a 2WD camper with an AAZ, would be great for towing, which is what it was originally designed and used for, with a bit of extra fuelling I'm led to believe...

Post by **Ye Olde Syncrospares** » 18 Mar 2006, 11:50

Thing is with a charge cooler is that they are a bit easier to mount than trying to find a suitable location for an intercooler where it will get suitable air flow, and on a syncro not get covered in kak and become a mud warming object!
Most of the easy places are either going to get showered with stones from the wheels or be in a totally useless location.
I've already mounted an intercooler on mine, gunna suck it and see with that if I ever get time to put the b*stard thing back on the road! been parked up 12 months now. Customer eh?! who would have em!

Simon, on CJ's computer.