16 Valve Heads

theo_m24 · Post by **theo_m24** » Wed Apr 14, 2004 8:37 am

I wondering how much more possible HP a 16 Valve head would make???

I wrote the guys at Arao and this is what they sent me........

The website will be updated in about a month. But they are a bolt on
16v head with valve area equal to a single 71mm intake valve and 60 mm
exhaust valves

http://www.araoengineering.com/VWheads.htm

roo · Post by **roo** » Wed Apr 14, 2004 9:55 am

anybody know what cylinder is being used on the pic on the above link. also did you get prices? i hope they're not out of everyone's league.

_INDY_ · Post by **_INDY_** » Wed Apr 14, 2004 11:54 am

16v aircooled? WOW

Glenn · Post by **Glenn** » Wed Apr 14, 2004 12:03 pm

Those cylinders are HUGE.

Honda's Killer · Post by **Honda's Killer** » Wed Apr 14, 2004 12:43 pm

I dont think its that comany, but there have been a company @ drag day selling them. The head is huge! I want to hear it run

turbobug56 · Post by **turbobug56** » Wed Apr 14, 2004 12:46 pm

Honda's Killer wrote:I dont think its that comany, but there have been a company @ drag day selling them. The head is huge! I want to hear it run

It is the same company...... Those heads have been in the proptype phase for 10+ years....... I have yet to see them run.........

Kenny2428 · Post by **Kenny2428** » Wed Apr 14, 2004 2:33 pm

Damn! Thats awsome.

stretch · Post by **stretch** » Wed Apr 14, 2004 6:04 pm

i cant wait. hope there not more than 910s.

Wally · Post by **Wally** » Wed Apr 14, 2004 11:06 pm

That would be interesting indeed!
Especially since Porsche decided that a 4 valve aircooled head could not be cooled properly for road use: the middle two exhaust ports would have a problem. Porsche then made the heads watercooled.
If they make it for drag racing only, it would not be a problem, but I'am more into street applications.
More info if you search with 'Apfelbeck'

A friend of mine, Roberto, is working on the completion of a 3-valve OHC head for the type 4 for road use. Initial flow figures were very promising!
Should be a year or so before completion.

Greetings,
Walter

64hardtopbug · Post by **64hardtopbug** » Thu Apr 15, 2004 2:39 am

if money wasn't an issue, run the nickies, squish pistons, and porsche fan shroud. things might be interesting there.

theo_m24 · Post by **theo_m24** » Thu Apr 15, 2004 6:25 pm

Wally wrote:That would be interesting indeed!Especially since Porschedecided that a 4 valve aircooled head could not be cooled properly for road use:
the middle two exhaust ports would have a problem. Porsche then made the heads watercooled.

Posches 4-Cam Motor was Bad ass.... If I remember right the 550 porsche last Flat four Racer..... After that they went back and forth between 6 and 8 cylinder motors to compete with the bigger motors of the Competition......

roachghia70 · Post by **roachghia70** » Thu Apr 15, 2004 6:49 pm

have you guys seen the rocker arm setup in the arao heads? doesn't look promising for anything faster than about 1500 rpms, but maybe that is still in the works.

Wally · Post by **Wally** » Fri Apr 16, 2004 12:22 am

Hi Theo,
Very nice picture! Impressive indeed, but a 4 cam motor is something different than 4 valve per cylinder engine!

Haven't seen that arao cam set-up. Where is it on their site?

Walter

roo · Post by **roo** » Wed Apr 21, 2004 3:24 pm

just out of curiosity why does no one use the 4 cam heads on a T1? we've all seen the sohc heads adapted you'd think more options would be possible with the 4 cam like variable timing and such.

Brian Murray · Post by **Brian Murray** » Wed Apr 21, 2004 3:28 pm

I saw the price at DragDay and it was in excess of $2k if you have that kind of money, go for it! Hopefully the price will drop as supply catches up with demand and the casting is perfected.