How are you driving the tach? Off the W wire? That isn't likely to be anywhere near correct without one of the converter boxes or modifying the tach.
Thanks for all the help guys. Tried to post yesterday but I kept getting an error.
What is the RPM range these engines are happiest at?
Interesting thread, but hardly scientific.
I like that someone claims that it's impossible for a 1.5N/A to do 80Mi/h just because their 1.6TD is reluctant to.
I think that's called vortex logic.
If they are talking stock 200k motors, especially much above sea level, they are likely correct. Taking 5 miles to get to a given speed don't count either
It's easy to forget how slow a tired, bone stock, un-optomized example of one can be. People say old Mercedes diesels are slow too, and a lot of em are, most even. But it isn't by design.
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Interesting thread, but hardly scientific.
I like that someone claims that it's impossible for a 1.5N/A to do 80Mi/h just because their 1.6TD is reluctant to.
I think that's called vortex logic.
Yeah that's bull crap; I got my 1.6 NA up to 82 merging on the Dumfries on ramp near 66, and that's with somebody else in the car much bigger than me. 70 wasn't too bad at all, just a little noisy. Just keep the damn things maintained and they'll take at least 90% of what the road throws at them.
My 89 NA Jetta is loud as hell over ninety.
Thanks for all the help guys. Tried to post yesterday but I kept getting an error.
What is the RPM range these engines are happiest at?
I try and keep my AAZ between 2000 and 3500 rpm. I don't know if it's happier there, but it makes power, and doesn't unhappy. With the N/A, I would always be between 3000 and 4500 just so it was making enough power to keep me moving (the 4-speed meant that I was over 4000rpm cruising at 120km/h). It screamed, but still got good mileage.