Rail pressure factory optimization

by **alex_sk** » Wed Dec 12, 2012 12:25 pm

I propose to discuss this map from stock Renault Espace 2.2dci 2000-2002.

pic1.gif

Look at 1500-3000rpm area. Keep in mind, this engine have max. torque at 1750 rpm and 2000rpm=95km/h 5th-gear.
What you think about?

by **Relic** » Wed Dec 12, 2012 1:04 pm

Might be trying to increase pump life.

Most people would probably be cruising below 2000rpm and 30mm3 is probbaly enough to maintain 80mph on a flat.
So it might be they want to use as low rail pressure as possible at constant speed.

Not pretty though is it :/

by **alex_sk** » Wed Dec 12, 2012 4:46 pm

I not hear about problem with lifetime pump BOSCH CP1.
This shape of map only at Espace-III. Espace-IV 2.2dci G9T have smooth map.

by **ecucartuner** » Mon Dec 31, 2012 11:45 pm

hi
What about to increase it by 4% starting with 1800 Rpm and 38% Load
?
Good Idea ~~~!!!!

regards

by **alex_sk** » Tue Jan 01, 2013 10:49 pm

For what?

by **ecucartuner** » Sat Jan 05, 2013 10:05 pm

Hi
For better consuming ,, and smooth moving

by **opelbravo** » Thu Jul 11, 2013 10:07 pm

---And lower vibrations on the motor.

by **zok** » Fri Jul 12, 2013 10:11 am

alex_sk wrote:I not hear about problem with lifetime pump BOSCH CP1.

The only problem is the lifetime of internal seals. Anyway, the seal kit can be bought off ebay for 20 GBP including shipping, and the replacement is very simple: demounting the timing belt, unbolting the sprocket and pump itself, disassembling, replacing the seals and everything in reversed order - 1 or 2 hr job, depends on the position and ease of acces to the pump.

Done it many times. :thumbup:

I have noticed that mine original setup (1.9 dCi 74 kW) isn't that smooth either (attached). Could be the emmission related cause. :yawn: Or maybe the injectors' lifetime...?

by **alex_sk** » Fri Jul 12, 2013 11:20 am

I modeling combustion process in my engine with Diesel-RK program. This engine have injectors with big productivity and at low-middle RPM and IQ injection too short in time when RP have common shape. With pilot-injection ignition delay short and short injected fuel fast burn with big and fast pressure increasing and hard diesel work. Lower RP retard injection and result is more soft combustion.
This is crazy, but 130hp Espace-III have about 1.5 time more productively injectors than 150hp Laguna with same G9T engine.