Getting back to the original question, i believe the terms are Over Square, and Dwell Angle. The 1.9 stroke is too long to try 1.5 rods as well.
Over Square: From what I recall, for moters with the same displacement, the ones that have a bigger bore and shorter stroke will have a tendency to rev higher.
Dwell Angle: Longer rods give a better dwell angle at TDC and produce more power.
My appologies, the above is somewhat fluffy, but its true to the best of my recolection.
However, I'm in the process of building a 1.5TD. What does the 1.5 offer us? Same bore as the 1.6, shorter stroke, and longer rods. So it looks like we have a motor that is more "Over Square" and has a better "Dwell Angle" than the 1.6. And from my recolection of driving a 1.5 rabbit with the right gear box, they revved higher than a sewing machine
The reason for the build is to produce a winter rabbit. My '79 round eye has never seen snow, and as long as I'm alive, never will. I prefer to drive Rabbits so I have been in need of a winter rabbit.
I've obtained a clean '84 with a trashed 1.5 diesel, and have been contemplating doing this for years. The rebult long block is back in the Rabbit. I have to put ALL the externals on, IE Manifolds, Rebuilt Turbo (Thanks Jake for the rebuild Kit) alternator, starter, IP, coolant spiggots...
It will be instrumented with preturbo EGT, and Boost gauge. No, it does not have the oil jets under the pistons, but it does have the turbo exhaust valves, and with the putzing I've done with my 1.6TD, i think I can avoid piston melt down with out the jets. Initial set up will be conservative.
Snow is in the forecaste here, so the '79 might be going into the hangar for the winter. The project urgancy is now elevated. Hopefully, I'll be able to report in a month or so my findings.
I have also rat holed an extra 1.5 crank and rods to mybe put in my 1.6td if the 1.5td program yields good results.
(Flame suite on)
Topic: 1.6 crank on 1.9 (Read 2636 times)
