[EfiniX]

I've just picked up my first 335d. It was a miraculous find @ $16k w/ 81,000m and a full intake cleaning (to the tune of $4400) a mere 1000 miles ago. I'd like to keep the intake clean, and I know meth will do it (at least in my experience w/ turbo petrol cars).

The diesel is a different beast. Dumping meth into my VR4 would have required updates to the VE table at the very least, changes to global fuel settings at the most. And of course, turning up the timing if I wanted to reap the real benefits. With a diesel, I wonder if these sorts of things are required if. Undoubtedly I'm leaving performance on the table without a custom tune, but if my goal is to just keep the intake clean(er) as the years go by, do I need to touch the tune? Diesel motors rev based on fuel volume, so am I really at risk of being "rich" like I would be with a petrol motor?

I do plan on adding a JDB, so I suspect meth will help me run that at a high setting.

Thanks in advance from this diesel noob.

[Torqu3]

Also interested in this. I believe you can run meth without a tune. However, I read way back when that it inhibits DPF regeneration.

[Hoooper]

You can run meth without a tune, and it doesnt seem to inhibit DPF regen, at least as long as you arent spraying tons of meth all the time. I ran without a tune, with meth and dpf, for over 60k miles (went on the car at 60k miles, off at 120k miles) and the DPF was still doing normal distances between regens.

[Torqu3]

Originally Posted by Hoooper

You can run meth without a tune, and it doesnt seem to inhibit DPF regen, at least as long as you arent spraying tons of meth all the time. I ran without a tune, with meth and dpf, for over 60k miles (went on the car at 60k miles, off at 120k miles) and the DPF was still doing normal distances between regens.

How did you have your controller set up?

[EfiniX]

Originally Posted by Hoooper

You can run meth without a tune, and it doesnt seem to inhibit DPF regen, at least as long as you arent spraying tons of meth all the time. I ran without a tune, with meth and dpf, for over 60k miles (went on the car at 60k miles, off at 120k miles) and the DPF was still doing normal distances between regens.

This is the sense I've been getting. And for my part, I can understand why one might consider methanol something that would hinder DPF regen. It does have the effect of cooling the EGT's, but I have to imagine that the car will still hit 240C in the exhaust even with meth. It's just not that hot.

[Hoooper]

Originally Posted by Torqu3

How did you have your controller set up?

I'm using an aem controller with built in map sensor right now. Comes in at 15 psi, full at 28 psi. Similar to what it was when I was otherwise stock.

During a regen you shouldn't be into the pedal enough for methanol injection to have any real impact on egts. Not to mention, at 50/50 or so mix it doesn't really reduce egts much if at all

[335dlci]

I have a torqbyte controller. Almost done wiring it up.

[335dsleeper]

1+

Originally Posted by Hoooper

You can run meth without a tune, and it doesnt seem to inhibit DPF regen, at least as long as you arent spraying tons of meth all the time. I ran without a tune, with meth and dpf, for over 60k miles (went on the car at 60k miles, off at 120k miles) and the DPF was still doing normal distances between regens.

[335stoner]

I almost made the same post Thursday. .... I was looking into using one of the aem or snow setups... I have also been looking through my left over turbo kits and other parts and almost have everything to part together a kit... really just need a solenoid and a jet for the water and a gods switch. ..

Just looking to spray some to keep clean after I do a cbu clean

[Andy198712]

Does it have a cleaning action? I know in the chamber it pretty much steam cleans in there which is great but will it work EGR and down stream?

[Torqu3]

Originally Posted by Andy198712

Does it have a cleaning action? I know in the chamber it pretty much steam cleans in there which is great but will it work EGR and down stream?

Yeah, it'll clean everything. EGR, intake manifold, valves, etc.