[jpsimon]

here's the info on PAW's website:
http://pawmotorsport.squarespace.com...shed-head.html

here's part of the post

PAW Motorsport is offering a cylinder head upgrade for N54 based BMW vehicles. There is a substantial gain in port flow velocity without a sacrifice in low lift situations. Flowbench charts show an increase of about 35% with gains from 161 cfm to 227 cfm. Both intake and exhaust ports have been ported and polished along with modified intake and exhaust valves. The claimed power gains with the head alone are in the 40 hp range. Charts and pictures are below.

Expect before and after results on a PAW DCT N54 project car in the next few weeks. For those interested in this upgrade there is a core charge in the $2800 range which obviously is refunded when the core is received.

[dzenno]

Here's the first email back from PAW Motorsports (Lenny) answering to some of my questions on their cylinder head:

======
Please attached find PDF info of our cylinder head. We have left out some info on the PDF cylinder head; like port velocity numbers; be able to use higher heat range besides using stock N54 Bi-hex yttrium plugs types & to be able to use any compatible higher heat range E9x S60B40 i.e.: Bosch motorsports spark plugs (Silver type). Pricing will be at USD3995.00 + Core charge with overnite shipping included in the US.
Also, VAC Motorsport has not done any N54 yet; they will not have CFM numbers, port velocity numbers, or pictures of the N54 in their site. They will sell the N54 package on their site, which would end up someone as a tester probably.
If you have any further questions, please feel free to contact us.
======















======
Another email:

Good friend PEI330ci (Adam ****) posted those charts on that forum and they were from our results done for the N54 & S54 head cylinder. We had provided the info to Adam so he can have collection of data to compare his development on the M54 & P54B20 (Not related to P54B32).

We had done a stock 135i with just a flash tune that gained additional ~40Hp at the wheels using stock TD03L-10T at same boost level by just simply bolting up the upgraded head. An upgraded bi-turbo & cylinder head upgrade would complement by allowing more volume in lb/min to be crammed & lower intake charge; thus we indicated an estimate up to 100hp gains possibility (I.e: Rob Beck turbos).

The coldest heat range found for bi-hex yttrium plugs are Heat 7 & we don’t think they will be producing something colder by Bosch or NGK. We have decided to machine the cylinder head to allow it to use other type of colder plugs that can be found in the NGK, Bosch or Brisk Racing catalog for the S60 engine.
======

These guys are apparently now also working on upgraded cams which will raise CFMs and VE to S54 levels which will be amazing...

[Jason]

Moved.

[cn555ic]

Wow dollar to HP is quite expensive!

[Sniz]

now THAT is a good mod for these cars. they need some better breathing up top big time. Seems BMW really wanted to give good mid range TQ but at the expense of the upper RPM band.

reworked head and cams along w turbo swap and you've got a true sportscar powerband.

[Potty_Pants]

Originally Posted by cn555ic

Wow dollar to HP is quite expensive!

true but the work involved and ultimately this HP would be on top of any tunes (may need to upgrade turbos).

how much HP is this upgraded head guarenteed to handle ?

ppp

[dzenno]

Originally Posted by cn555ic

Wow dollar to HP is quite expensive!

Yes, but, it's a proper thing to do..nos is great for hp to dollar but you're risking a lot

[Sniz]

Originally Posted by dzenno

Yes, but, it's a proper thing to do..nos is great for hp to dollar but you're risking a lot

+1

I would have no interest in using NOS on my street car, at all.

upgrade the breathing of the engine and everything is a win win.

[dzenno]

Originally Posted by Sniz

+1

I would have no interest in using NOS on my street car, at all.

upgrade the breathing of the engine and everything is a win win.

absolutely! yes the price is steep a bit but in all honesty did anyone expect this to be a lot cheaper? there's R&D work here...procede v1 was selling for 1500 and it was just a boost controller...Downpipes are close to a 1000 and people buy them and I'd say THAT's sad and definitely a rip off...this, while it could be a bit cheaper, actually had quite a bit of thought involved..

i also think that we might see a few more cylinder heads come out in the next few months that will be more competitive in pricing and maybe we do get a sub 3k performance head....

what will really tell a story here is once they bolt this up with RB turbos (which PAW will be doing in a few weeks) and see if it flows 100hp more than the stock head, same boost..

[enrita]

Originally Posted by dzenno

absolutely! yes the price is steep a bit but in all honesty did anyone expect this to be a lot cheaper? there's R&D work here...procede v1 was selling for 1500 and it was just a boost controller...Downpipes are close to a 1000 and people buy them and I'd say THAT's sad and definitely a rip off...this, while it could be a bit cheaper, actually had quite a bit of thought involved..

i also think that we might see a few more cylinder heads come out in the next few months that will be more competitive in pricing and maybe we do get a sub 3k performance head....

what will really tell a story here is once they bolt this up with RB turbos (which PAW will be doing in a few weeks) and see if it flows 100hp more than the stock head, same boost..

100 hp more same boost?

[luca335i]

What's the labour time on this u think?

[dzenno]

Originally Posted by enrita

100 hp more same boost?

I know, well, that's what they're claiming...should know soon enough as they'll be bolting this up on their 135i with RBs...keep in mind this is not at 8psi or 14psi or with stock turbos...this is probably 20-21psi on upgraded turbos where the stock head is apparently a lot more restrictive...at 14psi they saw improvement of around 40whp with stock turbos vs. stock head

Also keep in mind that all you need to do is shift the torque to the right a bit, which this will do, and same torque at higher RPM = higher peak whp

[Jeff@TopGearSolutions]

Originally Posted by Sniz

now THAT is a good mod for these cars. they need some better breathing up top big time. Seems BMW really wanted to give good mid range TQ but at the expense of the upper RPM band.

reworked head and cams along w turbo swap and you've got a true sportscar powerband.

+1

[Forcefed3]

So who is going to try it out? I wonder how fast these cars will be in a year or two.

[Brian135i]

Originally Posted by gbreeE90

So who is going to try it out? I wonder how fast these cars will be in a year or two.

Somebody should be able to hit 10.xx@130+ in the 1/4 mile this year.

[vasillalov]

Bigger valves means they *might* be a bit heavier. This can become a serious problem if the valve springs are not upgraded to handle the possible added weight of the valves. Potentially, this could lead to "floating valves", a situation where the valve spring is not strong enough to return the valve in the desired position.

Nevertheless, this looks like things are moving into the right direction and I am happy to see more shops getting into the N54 game!

[Forcefed3]

Originally Posted by Brian135i

Somebody should be able to hit 10.xx@130+ in the 1/4 mile this year.

If I remember correctly someone hit 11.01, but the fastest time on dragtimes.com is around 11.3. Maybe they didnt report it there?

[vasillalov]

Another question here: it seems that this will help the engine deliver more power at the upper rpm range, potentially allowing us to rev the engines higher.

I have no prior experience with VANOS, so I am wondering if the current VANOS system can handle the higher rpms, or will it barf?

[Brian135i]

Originally Posted by gbreeE90

If I remember correctly someone hit 11.01, but the fastest time on dragtimes.com is around 11.3. Maybe they didnt report it there?

The quickest 1/4 mile time is 11.1x as of right now, by OldBooster.

[Aridk]

The way I see it 75hp from Rb turbos and 25hp for the headwork
No way the fueling system can support 75-85 from the Rb and then an additional 100 hp

Enrita did´nt you have some work done on your head?

[dzenno]

Originally Posted by Aridk

The way I see it 75hp from Rb turbos and 25hp for the headwork
No way the fueling system can support 75-85 from the Rb and then an additional 100 hp

Enrita did´nt you have some work done on your head?

Pure speculation...on n54tech a thread has been started on the topic of looking into the OEM fuel system upgrade...everything so far is pointing at the LPFP, not HPFP or injectors..

[DesertDude]

OK. So we get more air through the engine, but how do we get more fuel? Do they have a solution to the fuel limitations people are currently seeing under higher boost pressures?

^^ Looks like some other forum members where wondering the same thing.