That's going to be awesome. You keep this up and you ARE going to end up with the LeMans X5 sound/feel. :thumbup:

Is it going to require additional tuning? I think you said you are using a DME that is a one-off type thing.

It was a dream Crystal.. LoL… It was supposed to stay a dream. :rant: Do you know how much concrete I would have in my back yard right now!! :explode:

:bustingup Yeah riiight! ZHP Cams, and Big Brakes, and it’s pretty much there. Sheesh! :shakehead:

So I have 3 types of electronics in my E53. DME, E85 ECM, and a secondary injection ECM. The BMW Doctor states that, the collectors as he calls them, provide more power based on the rearrangement of the exhaust gas discharge dynamics.

It makes sense, make more power by making things more efficient. My 2 Stroke with a carb, made waaay more power with a chamber that was extremely tuned!

So, where I luck out is, my E85 ECM is constantly tuning in real-time. It’s a byproduct of the system, because it’s an actual Flex-Fuel system. So if there is E10, E50, E85, E100, etc. it has to tune accordingly. So far the DME has been consistent at throwing timing at the system.

So, if the head is running cooler with the ethanol, and the exhaust discharge is creating a cooler environment as well with less heat and pressure, then one can assume the DME will throw more timing. Where the end is at, is anyones guess.

One thing I can say is, my boost should be greatly affected in a positive way. My blower will no longer be blowing directly into the cats. This should allow it to produce boost more quickly and efficiently, and may even allow the pressure to rise a minuscule amount. I’ve seen it hit 11lbs before. If it were to get closer to 12lbs, that would be in my opinion the most boost acceptable on stock internals. It’s right there!

We will see soon! :bmw:

Lord I wish I could do this but alas in CA I wouldn't pass emissions anymore. Now any ECU tuning will make it impossible to pass a smog...much less a cat delete. I will have to live vicariously through you! :)

OH BOY! :wow:

Thank you for helping me gain access to these headers! They are fantastic! I was so close to giving up on trying to order them! :2thumbs:

https://vimeo.com/670448812

:thumbup:

You had that monster dyno'd yet? :D

No, but I am a bit curious now myself.

I thought that maybe they would just make it sound a bit more aggressive, but that was not the case. They totally changed the power output. More low end, which totally caught me by surprise, and the top end is kind of intimidating, being 2 ton and all.

The revs in that quick vid, were only to 3800 rpm.

I don’t know about feeling anything thing like the P75 as far as power output (only half the engine, LoL).

But the sound is bonkers!

Putting the cats in the manifolds is brutal for power output. The M54 left a lot on the table from the factory.

I'd imagine that a blower would feel that even more.

Yeah they completely changed the power curve. It was a bit of a surprise. The blower is most definitely running more efficiently now, than before.

I was worried, because I have used headers on other applications before, and although top end was better, I had a distaste for the rest of the band. I get caught up in the exhaust note, and forget there is risk to the power output when making changes to an established setup. Not the case here, substantial upgrade to this setup.

Hats off to Dr. Lavr! The product definitely delivered. I got them just in time too! It seems with the conflict in Europe, that they may not be available in the U.S. for at least the moment.

I wish I had got some for the N62 as well. :dunno: