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Engine Specific Info and Questions => IDI Engine => Topic started by: aidan on September 27, 2004, 03:53:14 pm

Title: MPH/RPM
Post by: aidan on September 27, 2004, 03:53:14 pm: Just bought a '91 Jetta 1.6 TD today, without rev counter. I was wondering if anyone knew what the mph/rpm is in each gear, it is a 5 speed?

Forgive me if this is a repeated question, I couldn't find anything with a search.
Title: MPH/RPM
Post by: VWRacer on September 27, 2004, 04:36:45 pm: Aidan, go take a look at the bottom of the bellhousing on your car's trans -- you are looking for a code like "AWY" or "AGS". Then go to this website (http://www.scirocco.org/gears/) and plug in the numbers. You can build a complete gear chart from the info on that page.

Cheers! Stan

PS - There are more VW transmissions listed here (http://volksweb.relitech.com/helmut/GEARBOX.HTM). If your gearbox is one of these, just plug the numbers into the java calculator on the website I linked to above to build your gear chart.
Title: MPH/RPM
Post by: Wingaman on September 27, 2004, 07:03:15 pm: The redline of the VW diesel is 4500rpm if you don't know it. Good to know to build a chart :)
Title: Re: MPH/RPM
Post by: chrissev on September 28, 2004, 09:42:47 am: Quote from: "aidan"
Just bought a '91 Jetta 1.6 TD today, without rev counter. I was wondering if anyone knew what the mph/rpm is in each gear, it is a 5 speed?

Forgive me if this is a repeated question, I couldn't find anything with a search.

It will be an AWY tranny. Top gear is .89, so at 100km/hr you will be doing around 3100rpm.
Title: MPH/RPM
Post by: Blades on September 28, 2004, 10:32:20 am: TD don't have the AWY transmission.

They normally have 3.94 + 0.75 5th, so 100km/h = 2750rpm
Title: MPH/RPM
Post by: andy2 on September 30, 2004, 06:04:23 pm: my 91 jetta TD has a 86 TD trans in it and at 100 km/hr its at about 2625 rpm
Title: MPH/RPM
Post by: chrissev on October 01, 2004, 07:50:36 pm: Quote from: "Blades"
TD don't have the AWY transmission.

They normally have 3.94 + 0.75 5th, so 100km/h = 2750rpm

2750 in fourth maybe. You can do 120 with the .75 and be spinning 3000 or so.
Title: MPH/RPM
Post by: dieselpower on October 03, 2004, 01:11:55 am: i couldn't tell you what kinda tranny's in my car cuz it's been rplaced too many time to sount but here are ym numbers......i used the volkwagen dealerships vag com thinng to do this so im pretty sure its accurate.

2nd gear
rpm km/h
2500 33
3000 42
3500 50
4000 56
4500 65
5000 70

3rd gear
3000 65
3500 73
4000 84
4500 93
5000 108

4th
3000 90
3500 103
4000 118
4500 130
5000 145

i dont have a working tach yet so i use my speed as shift points. sorry i didnt do 1st or 5th but i spin through 1st and i don't hit 5th when i race so i didnt bother checking them out. i'll check out my tranny tommorow but i have a 1.6L TD in it.
anyway heres what i know
mark
Title: mph/rpm?
Post by: Hammy on October 03, 2004, 06:45:55 pm: Has anyone found any ring gears, and such, to make these things longer legged. My ACH revs just over 3000 at 100 kph, and like 3600 at 120 kph. I'd like to find something more like TDI ratios. Any ideas?
Title: Re: mph/rpm?
Post by: chrissev on October 08, 2004, 08:23:11 pm: Quote from: "Moonstone"
Has anyone found any ring gears, and such, to make these things longer legged. My ACH revs just over 3000 at 100 kph, and like 3600 at 120 kph. I'd like to find something more like TDI ratios. Any ideas?

You must have an '85 1.6 diesel. The ACH had the .89 fifth. Crappy, crappy crappy. Why does VW do this to their cars? Especially when they were putting GPs and GYs (.71 fourth) in their 1.6 non turbo diesels in the early 80s. I have no idea what you can do about this lousy fifth gear situation. Maybe you want to try to find a good AGS to put in your car to solve the problem. Now if VW would only make a 5spd for their golfs and jettas with the wonderful .68 fifth gear that was in the deluxe brazillian fox. THAT car would move on the highway!
Title: MPH/RPM
Post by: Hammy on October 17, 2004, 02:45:07 pm: chrissev;
You are correct about that tranny, it came from an 85, 1.6n/a Golf. Very good assumption! I think that I am going to find another tranny, I just wish I could find one similar to our '99 TDI. It would be great on the highway.
Title: MPH/RPM
Post by: ThumperTheRabbit on October 18, 2004, 08:09:58 am: I have a 1981 Volkswagen Rabbit diesel (4-speed) and have always wondered what kind of RPM's that little engine is pulling as I drive down the highway... Anyone know about that tranny??? I was also thinking about doing a 5 speed swap into it... But I'd like to know if I'll be turning lower RPMs with the 5 speed than the 4 speed... Anyone think they can help???

Thanks!! :)
Title: MPH/RPM
Post by: janb on October 19, 2004, 11:33:34 am: Quote from: "Moonstone"
chrissev;
You are correct about that tranny, it came from an 85, 1.6n/a Golf. Very good assumption! I think that I am going to find another tranny, I just wish I could find one similar to our '99 TDI. It would be great on the highway.

I like the ACN / ASF 'gas' ratios. They are adequately tall for cruising, but I take a 10% mileage hit (seems the VW-D's like to be 'run-hard')

The AGS seems to be best of Diesel choices

I find best economy in a 4 speed, and they are available in 'tall' (e-on knob-4th- GC) or low (GP) I get best mileage with the low ratio, but the tall ratio can preserve hearing loss :wink: