10-02-2015, 11:26 AM
I've looked into this severely before - great ideas, but there's a few things you need to be aware of.
Fitting a LR pump gives you the advance curve for a 2.5 litre, low revving, long stroke engine which is designed to rev to about 3200rpm and pull tree stumps out, but you're trying to build for a 2.0 litre almost square engine in comparison which will rev relatively well. You'll find that the VW guys tried this a lot and repeatedly found you basically have to completely recalibrate the advance curve for the smaller lighter revvier engine.
Also as you've found, these engines are adjusted on the vernier pulley, not on the slots - so either you find a correctly sized vernier pulley for the pump which fits the LR shaft or you grind out the slots in the pump. One is reasonably difficult to find and the other is a total f*cking bodge! The way to do it correctly is to build it into the 306 pump, but find out what affects the advance curve and swap it over
Also I don't know if the register on the snout is the same diameter - so you need to check that too if you do plan on the LR pump - which I wouldn't recommend.
The injectors are NOT as simple as "bang some 300tdi ones in" when doing this to an 8v engine - whilst they may *fit* they are by no means correct, you need to look at cone angles and plane angles, not to mention mounting offsets when swapping nozzles - trust me, it's a nightmare, 8v HDi guys simply can't find nozzles to fit in a CR application that are a real decent upgrade - I seriously considered this as an option and unless you want a ~140hp engine, which an XUD will do reliably, you're pretty stumped in terms of nozzles, unless you plan on risking wrong angles and just praying you don't turn the piston into a molten gob of mess. The JTD CR nozzles are also fairly useless in terms of our application, iirc they won't fit anyway and they're pretty small, but they can run 1200bar...
![[Image: ca03dce5.jpg]](http://i155.photobucket.com/albums/s313/FrankenCar/ca03dce5.jpg)
A'la above.
Fitting a LR pump gives you the advance curve for a 2.5 litre, low revving, long stroke engine which is designed to rev to about 3200rpm and pull tree stumps out, but you're trying to build for a 2.0 litre almost square engine in comparison which will rev relatively well. You'll find that the VW guys tried this a lot and repeatedly found you basically have to completely recalibrate the advance curve for the smaller lighter revvier engine.
Also as you've found, these engines are adjusted on the vernier pulley, not on the slots - so either you find a correctly sized vernier pulley for the pump which fits the LR shaft or you grind out the slots in the pump. One is reasonably difficult to find and the other is a total f*cking bodge! The way to do it correctly is to build it into the 306 pump, but find out what affects the advance curve and swap it over
Also I don't know if the register on the snout is the same diameter - so you need to check that too if you do plan on the LR pump - which I wouldn't recommend.The injectors are NOT as simple as "bang some 300tdi ones in" when doing this to an 8v engine - whilst they may *fit* they are by no means correct, you need to look at cone angles and plane angles, not to mention mounting offsets when swapping nozzles - trust me, it's a nightmare, 8v HDi guys simply can't find nozzles to fit in a CR application that are a real decent upgrade - I seriously considered this as an option and unless you want a ~140hp engine, which an XUD will do reliably, you're pretty stumped in terms of nozzles, unless you plan on risking wrong angles and just praying you don't turn the piston into a molten gob of mess. The JTD CR nozzles are also fairly useless in terms of our application, iirc they won't fit anyway and they're pretty small, but they can run 1200bar...
A'la above.