914 Diesel build.... Options

[PatrickB]

Here goes nothin....
Been planning this for a while, but it was supposed to be a winter project. Wasn't quite ready yet. KEP adaptor parts have been sitting here. Timeline moved up because of a failure.
Had a chirp that turned into a BAD miss, valve seat issue on one cylinder.

Had a fresh 1.9 AAZ diesel sitting in my storage trailer that had never been fired. (honed, rings, bearings, injection pump reseal). "new" engine was destined for my daily beater . Same engine in the beater is getting a little tired, I've put at least 350,000 km on it and the compression is getting down. Still runs okay though. Swapped the "new" engine into the beater. 16 year old son is learning...

[Porschef]

I don't know the gearing letters, but maybe a nice tall 5th in the 901 is the way to go for now.

[Dave_Darling]

I don't know the gearing letters, but maybe a nice tall 5th in the 901 is the way to go for now.

The stock 914 5th gear is the tallest original gear made for the 901-based gearboxes that I know of.

To go taller, you "flip" a gear set--that is, you switch which of the two shafts the gears ride on. There's one gear that goes on the main shaft, and one that goes on the pinion shaft; you move the first gear to the pinion shaft and the second gear to the main shaft.

Usually it's a 3rd gear that gets flipped.

https://members.rennlist.com/chuxter/901&915ratios.htm

--DD

[Dr Evil]

I don't know the gearing letters, but maybe a nice tall 5th in the 901 is the way to go for now.

The stock 914 5th gear is the tallest original gear made for the 901-based gearboxes that I know of.

To go taller, you "flip" a gear set--that is, you switch which of the two shafts the gears ride on. There's one gear that goes on the main shaft, and one that goes on the pinion shaft; you move the first gear to the pinion shaft and the second gear to the main shaft.

Usually it's a 3rd gear that gets flipped.

https://members.rennlist.com/chuxter/901&915ratios.htm

--DD

Because of the base circle on the gear, you can only go so small on the driven gear in 5th. ZD is stock for 914 5th gear and is the tallest stock gear. After that, a flipped H gear set (usually a second gear) is the only other alternative. This is a conversion that has been done hundreds of times without issue. The torque of a diesel wont be an issue in 5th as you are already moving and not trying to break the inertia of being stagnant, or even slow.

[PatrickB]

I don't know the gearing letters, but maybe a nice tall 5th in the 901 is the way to go for now.

The stock 914 5th gear is the tallest original gear made for the 901-based gearboxes that I know of.

To go taller, you "flip" a gear set--that is, you switch which of the two shafts the gears ride on. There's one gear that goes on the main shaft, and one that goes on the pinion shaft; you move the first gear to the pinion shaft and the second gear to the main shaft.

Usually it's a 3rd gear that gets flipped.

https://members.rennlist.com/chuxter/901&915ratios.htm

Because of the base circle on the gear, you can only go so small on the driven gear in 5th. ZD is stock for 914 5th gear and is the tallest stock gear. After that, a flipped H gear set (usually a second gear) is the only other alternative. This is a conversion that has been done hundreds of times without issue. The torque of a diesel wont be an issue in 5th as you are already moving and not trying to break the inertia of being stagnant, or even slow.

Sounds like the solution I'll use when I get there, but I don't think it will be this summer. Can you give me a ballpark of what the revs will be at say 60 mph? That's highway cruising gear, not pound on it gear.

--DD