N52 Cam in to N55

[mfindigital]

Interesting result here. Picked up 11whp with zero tuning, then 60whp with tuning (100whp at 5500rpm). Anyone heard of this or actually done this?

[Elderado82]

This is interesting. I wonder why BMW decided to go with a cam tuned more towards 5000 rpm instead of 5500 rpm in the N55 and less aggressive. Would this be for better fuel economy maybe? 60 hp gain off of one part is amazing news.

Also, what is the cost for something like this and is it difficult as a DIY?

[ShocknAwe]

This was discussed pretty heavily on another BMW forum (sp00lstreet). Consensus was that the gains are questionable and it was not an apples to apples comparison.

Edit: had to spoof the name due to senseless censorship. This hampers information sharing and is totally counterproductive.

[mfindigital]

Originally Posted by ShocknAwe

This was discussed pretty heavily on another BMW forum (sp00lstreet). Consensus was that the gains are questionable and it was not an apples to apples comparison.

Edit: had to spoof the name due to senseless censorship. This hampers information sharing and is totally counterproductive.

I actually saw your comments over there after posting this, but it got extremely technical. Basically they were claiming that the dyno's weren't valid because his 60whp gain could be accounted for by a better tune only, therefore the cams made no difference. But I didn't see anyone have a valid claim against the 11whp (pre-tune), and an upgraded cam should allow you to add timing. His new tune claims to have had no change to boost levels, only timing, which seems to make sense.

But 11whp for the cost of a cam off a junked motor is pretty good, especially if the car pulls harder higher in the rev band. Something that needs more research at the least. I can't believe there still aren't any real upgraded cams for these cars. That's what allowed the old 2jz's to make nasty power.

[ShocknAwe]

Originally Posted by mfindigital

I actually saw your comments over there after posting this, but it got extremely technical. Basically they were claiming that the dyno's weren't valid because his 60whp gain could be accounted for by a better tune only, therefore the cams made no difference. But I didn't see anyone have a valid claim against the 11whp (pre-tune), and an upgraded cam should allow you to add timing. His new tune claims to have had no change to boost levels, only timing, which seems to make sense.

But 11whp for the cost of a cam off a junked motor is pretty good, especially if the car pulls harder higher in the rev band. Something that needs more research at the least. I can't believe there still aren't any real upgraded cams for these cars. That's what allowed the old 2jz's to make nasty power.

The problem (if I recall anyway, grain of salt here) is that 11 whp is within the standard error of the Dyno. You could run back to back and see 20+ HP variation run to run based on a ton of environmental and mechanical variables.

I could show gains for just about anything if I cherry picked my sheets. A few vendors have lost serious credibility on various platforms I've been on over the years for doing just that.

[mfindigital]

Originally Posted by ShocknAwe

The problem (if I recall anyway, grain of salt here) is that 11 whp is within the standard error of the Dyno. You could run back to back and see 20+ HP variation run to run based on a ton of environmental and mechanical variables.

I could show gains for just about anything if I cherry picked my sheets. A few vendors have lost serious credibility on various platforms I've been on over the years for doing just that.

I get that, but these guys aren't trying to push the cams for sale and aren't doing their own tuning, so I don't know what they'd have to gain outside of posting one thread on Sp00lStreet. Would be nice if someone else gave it a shot, if I ever get a second car I may take the plunge. 530whp on 93 and meth is nothing to scoff at, seems like they built a great n55. Not many are in that power range.

[ShocknAwe]

Originally Posted by mfindigital

I get that, but these guys aren't trying to push the cams for sale and aren't doing their own tuning, so I don't know what they'd have to gain outside of posting one thread on Sp00lStreet. Would be nice if someone else gave it a shot, if I ever get a second car I may take the plunge. 530whp on 93 and meth is nothing to scoff at, seems like they built a great n55. Not many are in that power range.

No doubt of that.

Id want to approach it in a stepwise manner with PS2 turbo and meth first though. I'm inclined to believe you'll hit the target without having to crack the head.

[desertman123]

Wonder how it'd pair with MILVS

[mfindigital]

Originally Posted by desertman123

Wonder how it'd pair with MILVS

There is discussion on that as well on Sp00lStreet. The conversation got extremely technical towards the middle of the thread with all types of info I don't really understand. Basically turned into a couple of people who sound like they have mechanical engineering degrees arguing over tiny minutia.