Author Topic: 92 passat diesel (Read 5053 times)

vanagonturbo · « **Reply #15 on:** January 04, 2009, 05:14:35 pm »

i dont think that would be possible. I have never heard of a final drive ratio of 2:60 on any o2a.

TurboJ · « **Reply #16 on:** January 04, 2009, 11:19:41 pm »

You can search the web for 02A gear ratios.
The tallest available final drive ratios are about 3.1 IIRC.

BUT, if you'd use a diesel 02A, you would get pretty interesting ratios:

0.71 fifth gear and 3.1 final drive would come to 249 kmk/h at 5000 rpm and a cruise speed of 120 km/h at 2400 rpm....

The gasser ratios are also pretty long in Passats, just look at the tables and you know what I mean

TurboJ · « **Reply #17 on:** January 04, 2009, 11:21:59 pm »

Also, some Passats have the infamous dual mass flywheel - which is fine - if you're not after any serious power.. If you are, just replace it with a solid G60 flywheel and you're good to go.

holoffs · « **Reply #18 on:** January 05, 2009, 04:33:02 pm »

I did some ratio research and comparison today. Here is what I found out but first a little background. I have an 86 2 door jetta non turbo diesel with the AGS trans which I found too buzzy on the highway (3.94 final drive and .75 5th gear equaling 2831 rpm at 110 kph.) I'm just finishing a trans swap to the ACN 5 speed (3.67 final drive and .75 5th gear which should be about 2637 rpm at 110kmh

). My Passat has the 3 CES trans which has a 3.68 final drive combined with a .837 5th gear equaling 2950 rpm at 110 kph

). The TDI Passats came with a 3.94 final drive and a .717 5th gear working out to 2706 rpm at 110 kph.

. How about this. Could a TDI 5th gear set be swapped into my CES trans resulting in 2500 rpm at 110 kph?

. Tire sizing for all the above examples are 195-60-14.

TurboJ · « **Reply #19 on:** January 05, 2009, 04:36:39 pm »

Yes it could. But maybe easier to source a longer-ratio gearbox instead?

There are some versions of the 02A that have really long ratios. Something like 0.71 5th and 3.1 final...

vanagonturbo · « **Reply #20 on:** January 05, 2009, 08:08:19 pm »

keep in mind that with super long ratios, that passat may never see 110kmh. 52hp just wont cut it.

to the guy from Finland, in North america, we never got any transverse Passats with dual mass flywheels and pretty sure Europe didnt either :p

A 3:94 final and a .71 should work out fairly well if the engine is still in good shape. Still dunno about the 110kmh though. That could take some time.

holoffs · « **Reply #21 on:** January 05, 2009, 09:47:13 pm »

The engine I have for the passat is a turbo diesel and my goal is to get it up to 100 hp so I think 110 km/h cruising is no problem. I can do 110 with my non-turbo Jetta (sans hills of course). The TDI passat trans would work but I'm not sure about availability. I didn't see the ultra low ratio 02a (.71/3.1) on the search I did. Can anyone give me a number or application for that trans so I know where and what to look for. Also, any ideas where I can source gears for these transmissions?

TurboJ · « **Reply #22 on:** January 06, 2009, 05:28:05 am »

I'll see if I can find the gear ratio chart again, later today.

As for your cruising speed goal - 100 hp should do fine. My ALH Skoda Octavia had 90 hp and the top speed was 182 km/h....

About the dual-mass flywheel - well, if that's really the case then it's all easier. Someone told me the 351 Passats have it, but if not, no clutch problems then!

TurboJ · « **Reply #23 on:** January 06, 2009, 04:20:32 pm »

Quote from: "holoffs"

I didn't see the ultra low ratio 02a (.71/3.1) on the search I did. Can anyone give me a number or application for that trans so I know where and what to look for.

OK. The gearbox code ASD

1st: 3.300
2nd: 1.944
3rd: 1.308
4th: 1.09
5th 0.717
Final: 3.16

Those are pretty tall ratios already.