Ok this is all about my quest to find an uprated oil pump for the xe.
As some of you might of seen I bought a new pump from vx for a 160bhp ecotec engine (engine code X20XER), after Steve at SBD had one (but not used it) and had said it's gotta be better than the origonal xe one due to it's different deisgn.
I'm trying to get data to back this uprated performance up. I'm therefore trying to find out the output info of these 2 pumps.
To this end I looked in my Haynes Cav manual last night and found the following info:
Oil pressure at idle (engine warm)
20XEJ & C20XE = 2.5bar
X20XEV = 1.5bar
1st question (yes I'm a bit thick) - how many psi to 1 bar?
2nd - why is the ecotec engine only needing 1.5bar and the xe 2.5? (any thoughts?)
I need to track down the gen on the XER pump. It's part number is: 024402722.
I believe it fits not only the '99 onwards astra 2 ltr engone (160bhp), but also the Z20LET (new vx turbo engine), as well as the 2.2 ltr engines in the Sinetra (sp?), omega, frontera etc.
Anyone got a Haynes manual for one of these (NOTE: think it's gotta be post '99 car)? If so does it give oil pressure and can you tell me it please?
I anyone can find this info out on this pump I'd appreciate it (anyone work for vx & has acces to heir technical info?), as I don't want to carry out the mods required on this pump, (pick up pipe connection etc), without being certain it is better than the xe pump.
what do you believe an 'uprated' oil pump should acheive?
My view is that it should give a good operating pressure lower in the revs, and be able to maintain a higher maximum pressure in high revs. Is this your take on this subject?
I've given idle pressure as at the moment this is all the information I have found on the origional pumps, although I think it is of interest that the 2 have different pressures. Have you got any thought on why this might be? (block/oil way design??).
0dders you're a techy kind of quy usually with the data to back it up - any ideas how I can track down 'performance' data on these oil pumps, any useful sites or sources?
well i think the top of the list for high revving high power normally aspirated engines is not actually getting more pressure, but making sure the pump gear doesnt shatter and eat every bearing and mating surface in the engine.
Up to about 230bhp, maybe more the standard pump is fine, as far as pressure goes anyway, but obviously with steel gears to replace the sintered tat thats fitted as standard.
from then on your looking at dry sumps and dedicated standalone belt driven oil pumps.