Automatic 1.6 TD

[8v-of-fury]

How do you think the engine will feel cruising at 3400-3800 rpm's?

I know the engine is physically capable of sustaining such rpm's and that it will spin along without any real issue..

I guess what I am trying to ask is, what kinda boost will it be cruising at at this rpm? It will most likely be a stock mk2 unit mated up to an automatic transmission.. If I can't find one that has a usable 5spd to swap in that is..

[vanbcguy]

It'll be loud as all get out...

Boost will have a lot to do with the amount of load on the engine, but it wouldn't surprise me at all to find you could sustain 10 PSI while cruising.  I know I certainly can at highway speed around those RPMs.

Provided you've got a modified pump that will spin up higher you should be ok - the biggest drawback I can see is hitting the governor with a stock pump.  You'd basically be unable to accelerate since there's not really much RPM range left to drop a gear if you're in to the mid 3k's.

[CRSMP5]

with big original mk1 sized turbo. abt 5psi.. tdi sized turbo 10+psi.. and that baby will be revin pretty good..

[8v-of-fury]

Ultimately I have a very clean 90 wolfsburg Jetta.. That is a 3spd with the high compression 1.8L. I want it to be diesel so badly that I will suffice with it being automatic if I have too! Lol if it weren't a german car with practically new everything (complete brakes and suspension all 4 corners) I'd just sell it and buy another vw..

So really what would be best is to find a scrapped/rusted/crashed mk2 TD 5spd that I can take everything from. Motor, trans, axles (this 3spd has 100mm I believe), shifter rods, clutch cable and pedal.. To do a full on swappage on a weekend.

[RabbitJockey]

i liked my old automatic diesel rabbit, no turbo.  but it was really wound out on the highway, cruising along at 60-65 wasn't bad, but going much faster just seemed to be pushing it.  i think i went almost 80mph in it tho.  it got good fuel economy too, comparable to a manual

[8v-of-fury]

I am pretty sure the diesel 3spds came with a much lower R&P.. Something like 3.13? As compared to the 3.41 I think of the one I have. 115 km/h will put me at about 3400rpm. And with a TD it should have great power up there with the turbo just ready to go at any point.. Shouldn't ever have to kick down.

[burn_your_money]

Depending on what the code is on your tranny it may rev lower than a diesel auto.

Probably the biggest thing you will miss is the E mode. It drops it into neutral when you aren't on the throttle. Personally I think it's just so it doesn't rattle your teeth out when you are in D but not moving. You'll probably find yourself manually switching it into N quite a bit.

You need to find the diesel auto throttle cable and throttle cable mount on the pump, or rig something up to work.

[RabbitJockey]

haha i agree on the e setting being a dental feature.  i think the later automatics were all geared higher, they also had a more robust clutch, i think it had 2 extra discs.

[nathan_b]

chris, can you please describe a 1.5d automatic with a/c on?

thanks

[R.O.R-2.0]

haha i agree on the e setting being a dental feature.  i think the later automatics were all geared higher, they also had a more robust clutch, i think it had 2 extra discs.

negative, all the VW autos had 3 clutches.. the audi autos had the 5 clutches, and more robust..

[CRSMP5]

now nathan... that has nothing to do with his question...    he refers to a different thread on whoretex.. it was part of a add ac to a 1.6na autotragic kubvan.. would be gettin into a vanagon diesel aspect on speed/accel..

he has no E on this set up.. he wants to reuse his mk2 autotragic and add a diesel.. at least that show i read it..

1 major question for ya though.. if you do make it auto.. how to stall engine if the silinoid fails on the pump?? auto diesels have a mechanical lever to use if such things happen.. also the auto to pump throttle cable is a odd ball.. and they have 2 really odd hoses to run the oil cooler on auto tragic diesels gassers lack. cannot rember but i think gassers lack the cooler too.. may be a e only thing..

does the car have a tach stock?? the 89-90ish one i getta drive.. is a dog.. will not pull hills my 1.6idi na 5 speed does.. and its damb near 4k at 70mph..

[RabbitJockey]

haha i agree on the e setting being a dental feature.  i think the later automatics were all geared higher, they also had a more robust clutch, i think it had 2 extra discs.

negative, all the VW autos had 3 clutches.. the audi autos had the 5 clutches, and more robust..

b4s is one of the 010 gurus incase u don't know

I had an 010 on a G60 in my rabbit years back.  Lasted great, and was a bone-stock, never-rebuilt one.  It did slip after about a year's abuse, but a slipping trans is sooooooooooo easy to repair It's also REALLY easy to strengthen them, and manual valve bodies are now available. AVOID the Omni trans IMO.  I had one, but traded it away because it's a serious amount of custom work.  Not to mention that if anything happens to the case, you're boned.  The shop I traded it to spent $1000 CAN getting it built up...only to drop it, crack the case, and have to wait months for another one.  The 010 can EASILY be built up to the same level, it's just not as well known.
The MkII boxes have 4 clutches in the front drum and 3/4 clutches in the rear drum, vs the 3/3 of the Mk1 box.  The drums are all the same, just the spacer thicknesses inside are different.  I've disassembled a couple of them and it would be cake to bump that up to 5/5 if not 6/5 with some machining.  Couple that with a manual valve body and uprated chromoly pump drive (input shaft basically), and you've got a box that's ready for MUCHO hp.

[R.O.R-2.0]

How do you think the engine will feel cruising at 3400-3800 rpm's?

I know the engine is physically capable of sustaining such rpm's and that it will spin along without any real issue..

I guess what I am trying to ask is, what kinda boost will it be cruising at at this rpm? It will most likely be a stock mk2 unit mated up to an automatic transmission.. If I can't find one that has a usable 5spd to swap in that is..

dude, just wait till you can find a decent 5 spd to swap in there at the same time..

have you ever driven a GC equipped 4 speed car? you know how buzzy those feel at 100kph? well an auto would be WORSE..

my rabbit, with the AUG close ratio box i just swapped in, is only turning 2900 @ 100kph..

another 800 revs on top of that to go the same speed? that seems a bit ridiculous to me..

im a firm supporter of making due with what you have.. but for how many rare parts your gonna need to just make it work, i think i would wait till i can find a good manual trans swap..

the auto trans DOES INDEED have 100mm inners.. cant remember if it takes specific axles tho..

i bet, even if you got all the correct pieces to use the auto, i bet it would only get high 30s for fuel economy.. thats not that much better than whats in there now..

if the auto trans had an OD, instead of direct drive, it MIGHT be worth the hassle. it would also be nice if they had lock-up torque converters..

the only good thing about an auto, in my eyes, is that you can power brake it and build boost before you take off..

[RabbitJockey]

mine did 40-42 mpg in a rabbit,  mk2 boxes are geared higher, and i think but i'm not 100% sure the later trans actually had locking torque converters.  the real issue with them is driving on the highway, it just sucks,  i mean they go along fine but they are very loud and wound out at those speeds. if u plan on doing much highway driving using a 5 speed is really the way to go

[R.O.R-2.0]

mine did 40-42 mpg in a rabbit,  mk2 boxes are geared higher, and i think but i'm not 100% sure the later trans actually had locking torque converters.  the real issue with them is driving on the highway, it just sucks,  i mean they go along fine but they are very loud and wound out at those speeds. if u plan on doing much highway driving using a 5 speed is really the way to go

how LATE is a LATER TRANS?

im basically positive that nothing before mk3 had a locking TQ..

ive seen lots of mk2 autos, and not one has had a locking TQ..

i thought the locking torque converters were only on the 4 speed OD boxes?