The Cal-look Lounge

Hi,

maybe there will be a new aftermarket cylinder head for oxyboxer and/or 4" bore conversions available very soon. The first batch of 3 pairs (edit: 4 pairs) have just been finished on the CNC mill and the first set will be tested on an 86x100mm oxyboxer this spring.
The heads are constructed by Thorsten Pieper from germany (some of you may know his tool steel type 1 lifters and dry sump oilpumps...) and are completely CNC milled. These heads are aimed especially for street use so they are extensively finned and there are air channels between the ports as well. They feature a o-ringed cosworth style inlet flange, 50cc combustion chambers, twin spark ignition, and a maximum of 50x40mm valves is possible.
Thorsten isn´t sure if there will be more sets made but if you are interested in a set I can forward you with his contact details (PM please).
What do you think about it?  

Bye,

Tobi

[attachment=1][attachment=2][attachment=3]

More pics...

[attachment=1][attachment=2]

They sure looks nice. Any CFM numbers and price?

-BB-

No, unfortunately not...at least not at the moment - sorry!

Some more pics...

[attachment=1][attachment=2]

And the last two pics.

[attachment=1][attachment=2]

Vary nice!

Wow!  :o
They belong in the Tate Modern  8)

wooowww ....  :o

I like the way they glow blue from certain angles, cool  ::)

NICE, VERY nice.. ok texas tom, better place your order soon..

Even more intresting if you could order them with custom CNC- program for different valve, spark plug locations (bigger intakes) and bolt patterns.
This might be the ultimate head configuration for big cc N/A racing engines, definitely thumbs up. Not interested in relocating intake and exhaust guides for cast production heads. Add enough material for extreme porting and consider them sold :)  

Hi Tobi,
Can you define "twin spark'?

Not sure what you mean, I sort of see 2 possible holes for 2 sparkplugs per cylinder, but then no extra plugs in pictures, and If i'm looking correctly, the plugs would be next to each other in the same side of the cylinder?

Please correct me if I'm totally off base.

thanks,

Greg

Hi Greg,

just have a look at the 3rd pic and you can see the position of the two spark plug holes in each combustion chamber. But you are right: there´s just one sparkplug installed in the pic. ;)
BTW: the pics don´t show the final finish of the heads. After the milling they are glass blasted and a final anodizing is possible as well.
Thorsten decided to have a fourth pair machined in the first batch as he had ordered two spare aluminium blocks just for the case that anything would have been wrong with with the first heads. Fortunately everything was fine. :)
On the attached pic you can see all eight heads of the first batch. The pair on the left is already glass blasted.

[attachment=1]

Bye,

Tobi
 

These heads are defenatly top notch! The ultimate Daily driver head.

I'd say make the shafts split per cylinder and 3 studs each that would be perfect.

nice ;D

Nice heads. :)

I take it they are being send to the US for independent testing. As they have been make over here in Europe and we don't want OC67VW coming along saying they are not going to work as good as the originals. :P

Sure! ;D

Beautiful!!  It's great to see that so much innovation is happening recently.   8)

Which rocker layout will they use?

They look very nice, but the chamber needs some work in my opinion.
What aluminium quality has he used?

Looking nice! it's only a 'raw' cnc cutout Roman i think..  ;)

Hi,

as mentioned above these heads are primarily a private project which does not necessarily get marketed so these heads are no "plug&play" deal! The heads that are done right now will all receive stock style rockers (2-bolt design) but looking at the material left in the rocker arm area (sorry, I don´t know the right word for it) it should be possible to mount others like JPM rockers but that all would require machine work.

Thorsten wants to test these heads very soon on the streets - that means long distance autobahn driving with top speeds above 180km/h for him! ;D - and if they should work (regarding power, cooling and reliability) he will maybe make some more of them (complete sets with seats, valves etc. or maybe bare as well) if there should be enough interest.

Tobi

Hello Roman,

what exactely would you change on the chambers? Thorsten asked a lot of different tuners (Porsche, VW, jaguar, BMW motorcycle...) about their opnions in chamber design and the results can be seen on the pics. We will see if it works... ;)

But of course these heads - like any other head - can be further worked on by hand! In fact there is still some handporting left! At least to remove some marks on spots that the mill didin´t reach perfectly.

The aluminium quality is sort of a secret, yet but I will ask Thorsten if it´s okay to post it here.

Tobi

Yesterday I received my pair of heads which will be used for my next engine (86x101,6mm oxyboxer).
Attached are some more pics of the heads.

Tobi

[attachment=1] Bore is 108mm
[attachment=2] This shows where the second plug is placed

Wow they look awesome! Very happy with my TP lifters and it's very cool to see a privateer come up with these heads.

I have a wbx case for sale , ready for aircooled . If someone wants it ....ready to go with type1 lifter bushings

Udo

I have on the build also 4" bore engine, TF-1 case, 88 stroke and nickies.  This head is another excellent choice, firstly i was thinking to use JPM heads.

Very nice work!

scary i modelled about the same head design in CAD/CAM last year for virtual prototyping, seems like the need is there.

If you are interested in 'matching style' valve covers, contact me,i might have something very interesting to offer.  8)

Bump or whatever... Looks awesome! Any news?

Look here.....it´s German but many pictures to see.

http://bugfans.de/forum/wbx-fremdmotoren/7er-wbx-luft-fur-das-weisze-ungetum-t2693.html

The engine run´s very well and in the next year it will be go up to 2,8l ;D

Greetings Thorsten

Dear Thorsten

Are you able to sell me a set of your famous tool steel lifters.
I'm thinking of using them in my race engine: 2977cc T1
Do you think they will survive 8000 RPM at 550lbs to 580lbs
spring pressure at .660 lift ?

MeXX

You do not need that much spring pressure @8000 , no matter what lifters weight you have

Udo

Dear Udo

I know that it is to much, but it is just to be sure that it is enough to avoid valve float or even worse valve bounce at every RPM and everytime, otherwise it will kill power and parts.

MeXX

I do up to 9000 with my 60 gramm lifters and K-800 springs . so if you have a light weight lifter the K-800 are ok

Udo

Titanium valves I guess ? what size
What type of pushrods ?

John

50x40 titanium valves and Gene Berg silver pushrods

Udo

Can these heads be used in a type iv engine?

No, they can´t as the distance between the cylinders is different.

Tobi

These heads look very promising, is he selling them yet?  I am very interested. I was thinking to stuff them with JPM springs and retainers and some manley type 4 valves 48x38..

Hi Alex,

indeed there are some news about these heads! Thorsten's 2.7L (86x100mm) engine was used successffully last season. At first it had some minor problems with knocking so the chambers got modified and all is okay now.
It made around 215rwhp (I can´t remember the exact number) while being 100% street worthy. The heads are cooling very good, even on high speed autobahn trips.
A second batch of heads have just been finished so there will be a few oxyboxers built for the upcoming season.
The heads have been tested on a flow bench. The exhaust port proved to be very effective while the inlet port and 46mm inlet valve seems to be a little restrictive and could obviously be improved with a bigger valve and some porting.
The price for a pair of bare heads (no valves, seats and valve guides), black anodized will be around 1.800 Euros.

Tobi

[attachment=1]

Definetly want to buy these heads.   :) It looks like a good idea to have throughholes for cooling air.   I heard that twinspark setup is very beneficial. Wonder if you can harness megasquirt and eight coils to work together :) If not, then just  correct distributor.

http://www.thesamba.com/vw/forum/viewtopic.php?t=374534

Got to see these heads at the Wintermeet in Herford some days ago.
Pure cylinder head porn  :-*
(http://bugfans.de/forum/resources/ich-seh-schwarz/13930)

These heads will be a nice pair with my 4" nickies  :P

(http://img232.imageshack.us/img232/2442/24052012h.jpg)

I have heard that there is better improved version coming from Thorsten ;)  And i am getting one pair these improved heads :D

Hi Alex,

you are right. The third batch of heads with some improvements (one of which being a more efficient inlet port) is getting machined right now. Great to see some more engines with these heads very soon...! ;)

Tobi

Intake port on new version is much more straigth and smoother.  Looks also a bit bigger.  He has finished few sets, in a few weeks i will get mine  ;D


(http://img163.imageshack.us/img163/2492/20130514191806custom.jpg)


(http://img811.imageshack.us/img811/2610/20130514191746custom.jpg)


(http://img29.imageshack.us/img29/5062/20130514191826custom.jpg)



Old and new intake port  ;D


(http://img22.imageshack.us/img22/8871/oldchannel.jpg)

(http://img7.imageshack.us/img7/139/newchannel.jpg)

Any more progress on this?

Very very nice, The evo intake port is an improvement, even on stock style ports like 044 etc,  I see the mistake most tuners make by removing meterial from the intake port floor below the bump, valve Spring seat looks substantial enough too, pics show wasser stud spacing dimensions I take it?