Apfelbeck head on flowbank (pic)

raygreenwood · Post by **raygreenwood** » Mon Feb 16, 2004 7:16 pm

Cool article! Thanks. But.....what the gentleman is adjusting in the picture is actually the MPS not the fuel pressure regulator. Reporters...just can't trust em

Ray

roberto · Post by **roberto** » Wed Feb 25, 2004 1:19 pm

MASSIVE TYPE IV wrote:Sweet! Let us know how they flow!

First test results
Inlet 271 cfm 0.500" lift at 27" ( compleet whit manifold etc.)
Exhaust 215 cfm 0.500"lift at 27"

And still a lot to improve

Greetings Roberto

MASSIVE TYPE IV · Post by **MASSIVE TYPE IV** » Wed Feb 25, 2004 1:32 pm

DAMN!

Wally · Post by **Wally** » Wed Feb 25, 2004 1:46 pm

Thanks Roberto!

And I know that was with two 36mm intake valves and one 42mm exhaust valve.
According to the book Apfelbeck wrote, two 38mm intake and one 46mm exhaust is possible!

Thanks for the update!

Walter

Alpine · Post by **Alpine** » Wed Feb 25, 2004 3:55 pm

Very cool! What's the story behind these heads? Are they made specifically for the Type 4 motor? Will they be going into production? I think I'm in love.

Paul Illick · Post by **Paul Illick** » Thu Feb 26, 2004 3:16 pm

How are the cams driven? Simple gears and timing belt off the crank pulley?

Cam · Post by **Cam** » Thu Feb 26, 2004 10:57 pm

Nice!

dstar5000 · Post by **dstar5000** » Fri Feb 27, 2004 7:36 am

notice it was measured at 27" .......

Flow rate would be a little lower,
if measured at the normal 26".

Don

Wally · Post by **Wally** » Sun Feb 29, 2004 11:27 pm

Hi Don,
Yes, you're right: Roberto went through the documentation of the SuperFlo machine and it has a re-calculation sheet from 27 to 25" that is a 3 or 4% difference. So what. Flow numbers are very high in his first (!) attempt anyway.
It should be mentioned that he measured flow WITH the manifold (a temporary one) and a throttle body (45mm). Normally the flow numbers of heads are quoted without carb/thottle body and manifold. This would be more than a 3-4% difference when left off.

Alpine, yes these heads were specificly designed for the type 4. The designer of those heads even stated that on a 2 liter type 4, 230 (DIN) hp would be possible!
As for production, it would be possible I suppose, but who would be willing to pay more than even the ('big daddy') Remmele heads cost? After all, besides the heads themselves, you would also need the special pulleys, intermediate shaft, intake manifolds and special camshafts. It adds up quickly also because its all custom. Consider just only the problem of different strokes with regard to your cam drive: you would need a different cam belt for each engine configuration and stock cambelts of car manufacturers only come in specific lengths; Its just one of those 'minor' problems, although I heard Roberto thought of something clever for that one...

Paul, I hope that answered your q as well. AFAIK, the cams will be belt driven from the pulley and probably with an intermediate shaft for the left cylinderbank (nr. 3 and 4) to overcome the otherwise too long of a cam extention.

Greetings,
Walter

Stroker 40 horse · Post by **Stroker 40 horse** » Mon Mar 01, 2004 12:37 am

What is the source for the valves/seats/springs/guides

Wally · Post by **Wally** » Mon Mar 01, 2004 12:51 am

Stroker 40 horse wrote:What is the source for the valves/seats/springs/guides

Not sure; all I know is that he used a stock 42mm 914 2,0 ltr intake valve to be used just for flow testing purposes as an exhaust valve. There's a wide range of aftermarket and OEM for valves, springs etc, so I'am sure he'll find appropiate ones.
Why do you want to know?

Walter

Stroker 40 horse · Post by **Stroker 40 horse** » Mon Mar 01, 2004 1:34 am

I am trying to assert their practicality...

bash555 · Post by **bash555** » Sat Apr 17, 2004 10:03 pm

check out these two books by Ludwig Apfelbeck

http://www.amazon.de/exec/obidos/ASIN/3 ... 45-1173325

http://www.amazon.de/exec/obidos/ASIN/3 ... 45-1173325

also check this

http://www.amazon.de/exec/obidos/ASIN/3 ... 45-1173325

thats the Porsche/TAG V6 Turbo Indy Engine ( i think)

too bad i cant read German

Wally · Post by **Wally** » Sun Apr 18, 2004 8:46 am

Hi Bash555,
In the book you mentioned "Wege zum 4 Takt Hochleistungsmotoren" the molds and heads that Roberto has aquired are discussed and pictures of them are in that book also.

I have a german copy of the book and also seen the heads and molds in person. Very exiting stuff!

He's now working on the cam drive. It will take some time, but he will definately get there!

Greetings,
Walter