130 to 155

[Giles@PerformanceDiesel]

hey

i've not seen any reason to up the pressure more than 155, i tried more
and it made the engine very noisy and made less power.

i can't really tell you how more to modify your pump without giving away
more of my trade secrets so to speak. i will tell you that by upping the
internal pump pressure all you're doing is to give you quicker advance.

Giles

[subsonic]

hey

i've not seen any reason to up the pressure more than 155, i tried more
and it made the engine very noisy and made less power.

Giles

Thanks.  Were the 1.9's originally set at 155?
Bummed out I missed the GTG.  I may try and come up after I get my engine together.  It's a 10 1/2 hour drive.  I figure that will be a nice break in.  Perhaps in a few months.  Might ride up with a friend of mine who has a son that was drafted by the Kitchner Rangers. Tune the car, watch some hockey, drink some brews.

[Vincent Waldon]

The stock AAZ injectors have a breaking pressure of 150 bar.

[Vanagoner]

If 130 is better for economy (due to less energy expended to pump, right?) and 155 is better for working with boost, why hasn't someone tried 140's for a car with modest boost that can get good economy?  or 120's for N/A's with even higher economy?

[Giles@PerformanceDiesel]

guys these small changes in pressure don't make any difference in the
fuel economy.

if anything the higher the pressure the better atomization so better
efficeincy mixing with the air.

Giles

[Tintin]

I have just looked in Esitronic for an hour and for fun, and I have to find some interesting thing, I found several turbo diesel engine (IDI) between 1.5L and 2.0L, equipped with Bosch VE + Bosch injector at 130B, and some with 125B, and several other between 150B and 175B, also found some engine at 175B without Turbo.