4-Valve DOHC engine

mally914 · Post by **mally914** » Sat Jul 12, 2008 9:54 am

blown away with the heads they look and sound fantastic are you planning on putting them into production soon and have you figured out prices yet , will it be a kit to convert your engine , i have put a link up on 914club .com as they love new ideas they genarated lot of interest on the us site mate

pae · Post by **pae** » Sat Jul 12, 2008 12:55 pm

Very, very nice. I love these projects - it's great to see some quality engineering development work taking place. Good luck with it and please keep us informed.

Phil

bugat5speed · Post by **bugat5speed** » Sat Jul 12, 2008 5:14 pm

as the engine will be a complete piece of engineering it will be a complete engine that will be sold. Only heads will not help anyone (or perhaps only a few people).
Can´t say much about prices now, but I can tell you that it will be in an area comparable to the high-end type 4 motors that the famous type 4-tuners sell.
Might be that we later make a conversion for 911-engines, as the heads fit 911-engines also. But for this new camboxes and camshafts would have to be made. But first let´s see how they work.

@ Mally: thanks for putting the link to 914world.com

Martin

bugat5speed · Post by **bugat5speed** » Mon Mar 02, 2009 9:38 am

Hi,

wanted to give you an update on the status of the heads/the engine.

Robert Bernauer now did the first few flowbench tests with the heads. The results are really impressive and we expect a very good performance of the engine. The heads with no adjustments made (only mounted) were already better than the best type 4 race heads he had compared.
He made 3 further tests with each time smalle adjustments and the flow data let us hope on a very good performance of the engine.
Flow at 25" is:

1mm - 38,2
2mm - 70,9
3mm - 107,9
4mm - 144,1
5mm - 183,3
6mm - 210,7
7mm - 230,7
8mm - 245,8
9mm - 256,0
10mm - 263,7
11mm - 267,6
12mm - 272,2
All measurements without manifold.
12 mm with a primitive manifold 285,4
13 mm with this manifold 289,1.

There are still some things to be done, so that we can expect a further improvement. But even if it stays like this we are very satisfied with what we have.
Next week I will finally have the die/mld for the manifolds. As soon as we have the first casted manifolds Robert will test the whole range again with manifolds.
More info to follow.

Martin

fourteener · Post by **fourteener** » Mon Mar 02, 2009 9:32 pm

Very interesting! Didn't someone in England engineer a flat 4 with 964 heads and the cams were belt driven?

hot66 · Post by **hot66** » Mon Mar 02, 2009 10:01 pm

fourteener wrote:Very interesting! Didn't someone in England engineer a flat 4 with 964 heads and the cams were belt driven?

yes, Russ Fellows

mally914 · Post by **mally914** » Wed Mar 04, 2009 9:57 pm

im in the early stages of building a 2.1/2.2 engine with a long stroke crank in my 914 i was looking into poss running throttle boddies instead of carbs any info on how these heads would work with this combination how close are you to production and any idea on costs for the heads yet thanks john

bugat5speed · Post by **bugat5speed** » Wed Apr 08, 2009 5:52 pm

Hi,

today I received the first casted manifolds. They will be on my CNC mill the next days. Afterwards we will make new flowbench-tests.

We now have an engine to test the heads and everything. Will still take a while, but an end is at sight.

Will keep you informed

Martin