Jet fuel purchase...

[Happy]

Originally Posted by Fifty150hs

When you put in the supercharger did you upgrade your bottom end? Pistons? Rods? Head bolts? If not, adding nitro-methane isn't likely to end well.

No, no upgrades. I was informed that, the bottom end is pretty much the same as the S54, other than the block material, and the pistons. I was also told, adding forced induction to a M54 versus S54 was safer, and would be more reliable. Although, I still had to replace my rod bearings.

Originally Posted by X5chemist

Nitromethane will provide oxygen to burn the methanol. It's harder to ignite than petrol fuel. Plus it burns slower too. Cooling will be important if successfully injected to burn. I don't have the knowledge to make it work in an engine.

The primary fuel powering my E53 is ethanol. Also, the nitromethane will be cut with methanol, and water.

It’s all about the mixture not separating, and remaining stable.

The total amount of nitromethane per one gallon mixture, will 8 ounces.

[andrewwynn]

Remove the inner fender Plastics to access the SAP screws.

[X5chemist]

I dropped the hard to reach third bolt. Since I had a 10 mm socket out, I remove the lower plastic skid plate to retrieve it. The bolt was not there. The front corner has a separate open area. Since two screws are missing, pulled the panel back and found the bolt. I saved the bolt for later installation. Once I found it, I wondered if I could reach up and screw it on. My smallest ratchet will work better to reach it. Two zip ties were used to secure the panels. Next time I have time, I'll reach through fog light hole to install it.

[X5chemist]

The new pump works great. You can hear it run. It’s not as annoying as the jet sound start. The old pump impeller has a lot of play. Through the top hole, I can pull it up a bit. If you shake it, it’s all loose inside. I guess all the bearings inside are toast. I may take it apart just to see what it looks like.

[andrewwynn]

I did an autopsy on mine. I never figured out how to non destructively remove the impeller but the design is interesting inside was worth taking apart.

[X5chemist]

Two non OEM pumps were returned for setting low flow alarms. I ordered an OEM HELLA 722166390 FROM RockAuto. Well, it's different but can fit. The plug is not extended though. HELLA 722166390 has the connector built into the lower motor case. Plus, mounting bolts are bolts and not studs. Should I find bolts and mount? Or return it another for a rubber stud mount unit? What size are the bolts? M8X&&???

[workingonit]

Originally Posted by X5chemist

Two non OEM pumps were returned for setting low flow alarms. I ordered an OEM HELLA 722166390 FROM RockAuto. Well, it's different but can fit. The plug is not extended though. HELLA 722166390 has the connector built into the lower motor case. Plus, mounting bolts are bolts and not studs. Should I find bolts and mount? Or return it another for a rubber stud mount unit? What size are the bolts? M8X&&???

Your thread spurred my interest in the smog pump system, which I never took much notice of, before. Mine's obviously well-used and has been there awhile (from the dirty hoses), so It must be working OK (no codes).

Looking at the part numbers visible without mirrors and such, I saw that the air cleaner and air valve were as listed elsewhere as correct for my '01 X5, but not the secondary air pump itself. I could see that it's a Pierburg PA6-GF30 (which comes up to also be a Hella 722738080), which most of the sites I saw listed it to be a VW-Audi_Lamborghini part. And just googling PA6-GF30 will bring up "boost controllers".

So. I guess if my VW part fails in the future, just about any secondary air pump will do, so I'll start with cheaper VW parts (used) and work my way up to Lambo parts. HAHA.

[X5chemist]

Ok, hopefully a third time is a charm. The first pump was returned since it set emission codes. The second one had different mounting hardware. The third is a HELLA 728124190. The most expensive one RockAuto sells. It was installed yesterday. I didn't hear any loud bearing noises. Yet, I don't know how it works when the engine is hot. I know it definitely runs on first cold start up.

[Fifty150hs]

Originally Posted by X5chemist

Ok, hopefully a third time is a charm. The first pump was returned since it set emission codes. The second one had different mounting hardware. The third is a HELLA 728124190. The most expensive one RockAuto sells. It was installed yesterday. I didn't hear any loud bearing noises. Yet, I don't know how it works when the engine is hot. I know it definitely runs on first cold start up.

It only runs at cold start up. If you're not hearing bad noise at cold start and not getting codes, you're probably good.

[X5chemist]

Two cold start ups and no bearing noise. It definitely runs. You can hear a slight humming sound. All good so far. Registration is due in Jan. I'm waiting on power steering hoses and a reservoir. Once installed, it will go for inspection. Three months out gives me time to fix anything that pops up.