bugat5speed
Newbie
 Offline
Posts: 19
|
|
« on: June 24, 2008, 02:51:27 pm » |
|
Hi, gave a first info about my project a while ago (in another thread). Here a short update: Just finnished milling the latest batch of heads on my mill. This time even the fins were cut. There were some changes made to the mold since the first cast-run. The engine will be a 4 valve DOHC aircooled engine with a 5-bearing crankshaft (own crankcase also). Revvs of more than 8.000 wonīt be a problem. Displacement max. around 2.6 litres. 100 PS per 1000 cc is our minimum expectation. Cooling system more classic-style (like 356 Fuhrmann Carrera engine). Engine will only be about 1-2 cms wider than a type 1, so will fit well into Beetle. Try to upload some pictures (hope it works) Martin Bott Bug @ 5-Speed Germany www.bugat5speed.de |
|
|
|
|
Logged
|
|
|
|
|
petevw
|
|
« Reply #1 on: June 24, 2008, 04:01:37 pm » |
|
Martin, thanks for showing your work. Looks like a cool project.
Pete
|
|
|
|
|
Logged
|
|
|
|
|
jimr
|
|
« Reply #2 on: June 24, 2008, 05:37:21 pm » |
|
love to hear more progress as it happens..... very intriguing.
Like to see Fuhrmann-style cooling system as well....will it be dual entry fan like Carrera?
congrats on the achievement.
|
|
|
|
|
Logged
|
Der Kleiner Panzers VW Club
|
|
|
|
scott s
|
|
« Reply #3 on: June 24, 2008, 08:20:23 pm » |
|
love to hear more progress as it happens..... very intriguing.
Like to see Fuhrmann-style cooling system as well....will it be dual entry fan like Carrera?
congrats on the achievement.
At one time, Jake Raby was working on a Carrera style fan/shroud. Don't know the latest on it though.. Oh, and those heads are bad ass! |
|
|
|
|
Logged
|
Pull the pin and count to what?
|
|
|
derek
Junior
Offline
Posts: 147
|
|
« Reply #4 on: June 24, 2008, 11:02:11 pm » |
|
Awesome. I was wondering when some one would design a set of DOHC heads for an Aircooled VW.
|
|
|
|
|
Logged
|
|
|
|
|
Alexander_Monday
Guest
|
|
« Reply #5 on: June 25, 2008, 08:49:05 am » |
|
|
|
|
|
|
Logged
|
|
|
|
|
Jake Raby
|
|
« Reply #6 on: June 25, 2008, 01:36:44 pm » |
|
The carrera cooling system is still in development.. I have had to make CNC every single part from scratch and will have to reconstruct another version of it for Martin's heads..
I hope to be testing the system by this time next year, but its a slow process with the amount of detail I am using to create the system. I am not shooting for appearance nearly as much as effectiveness.
I spnt a week at Bill Doyle's Rennwagen Motor Company in Jackson WY last year gathering data and designing parts.. The main hood of the shroud was pulled from a factory 547 4 cam hand built aluminum unit from a 1955 Spyder, so it is as authentic as they come!
Martin,
I sent you an email but have not gotten your reply. I'll be needing heads soon if you want a version of this developed for your arrangement.
Here are some solid works screen shots of the parts we are making now. I am keeping the DTM design and calling this DTM V 3.0. The dual inlet fan is the biggest expense of the project. All parts are being made in the USA.
|
|
|
|
|
Logged
|
|
|
|
kafercup
Newbie
Offline
Posts: 26
|
|
« Reply #7 on: June 28, 2008, 07:43:59 pm » |
|
Jake, can you repost the pcs of the DTM 3.0? They aren't showing up. I'd love to see the latest variant of the design. What are the principal changes?
|
|
|
|
|
Logged
|
|
|
|
micheloaks
Newbie
Offline
Posts: 1
|
|
« Reply #8 on: January 09, 2009, 09:42:13 am » |
|
Martin great project!!!!! Can you provide any pricing informaiton and other technical information? Jake can you post the pics of the shroud you mentioned...They didn't show up?? Look forward to seeing the project unveiled in mid 2009?  |
|
|
|
|
Logged
|
|
|
|
jeff68
Junior
Offline
Posts: 248
|
|
« Reply #9 on: January 09, 2009, 09:56:40 am » |
|
Definitely forward thinking. A four cam flat four air cooled VW would be incredible. I admire the amount of work and dedication to work toward something like this. Awesome work.
|
|
|
|
|
Logged
|
|
|
|
|
elmo
|
|
« Reply #10 on: January 09, 2009, 02:49:21 pm » |
|
Since this thread has been brought back to life, is there any current info or updated pictures?
|
|
|
|
|
Logged
|
Semper ubi, sub ubi.
|
|
|
1946vw
Newbie
Offline
Posts: 32
|
|
« Reply #11 on: January 13, 2009, 01:46:41 am » |
|
The new 1680
|
|
|
|
|
Logged
|
|
|
|
1946vw
Newbie
Offline
Posts: 32
|
|
« Reply #12 on: January 13, 2009, 01:48:40 am » |
|
More new 1680
|
|
|
|
|
Logged
|
|
|
|
|
JVance
|
|
« Reply #13 on: January 13, 2009, 09:12:19 am » |
|
That's pretty wild, Brian! Did you design the heads with a 2-valve chamber or multi-valve chamber?
|
|
|
|
|
Logged
|
Thanks Rocky Jennings, DRD, and Pauter -Stripped66
|
|
|
|
Mike Lawless
|
|
« Reply #14 on: January 13, 2009, 10:42:42 am » |
|
I like the VW logo lover machined into the cover!
Pretty tricky stuff Brian!
|
|
|
|
|
Logged
|
|
|
|
bugat5speed
Newbie
Offline
Posts: 19
|
|
« Reply #15 on: March 02, 2009, 09:02:17 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 compared.
He made 3 further tests with each time smaller 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 above 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
|
|
|
|
|
Logged
|
|
|
|
|
Tom Simon
|
|
« Reply #16 on: March 02, 2009, 02:38:32 pm » |
|
The new 1680
for the NHRA G Dragster effort? |
|
|
|
|
Logged
|
|
|
|
bugat5speed
Newbie
Offline
Posts: 19
|
|
« Reply #17 on: March 02, 2009, 03:17:00 pm » |
|
flowbench figures above are from the Bug @ 5-Speed 4valve DOHC heads.
Not of the new 1680s
Donīt know their flow-data.
Martin
Bug @ 5-Speed
|
|
|
|
|
Logged
|
|
|
|
|
Old VW racer
|
|
« Reply #18 on: March 04, 2009, 12:22:26 am » |
|
Tom Simon, the NHRA rules for G dragster say two valves per cylinder only. To take advantage of that much flow the 1680 engine needs to turn about 17,000 Rpm.
|
|
|
|
« Last Edit: March 04, 2009, 12:31:45 am by Old VW racer »
|
Logged
|
|
|
|
|
Tom Simon
|
|
« Reply #19 on: March 04, 2009, 07:59:48 pm » |
|
Hi Larry, I think you missed a subtle point...
there are two distinct separate heads and pictures on this thread... the ones bugat5speed shows are 4 valve with flow numbers (the Porsche 6cyl. looking ones).
posts by 1946vw are 1680cc DOHC but we don't see valves (Brian Hyerstay I think) Since I think these are Brian's new billet heads, he chases G Dragster, I can't assume 4 valve from the pictures (you can't tell w/valvecover on, all I can see is two sparkplug holes and two cam tunnels), and will assume they fit the class.
Maybe 1946vw will 'come back' and add a little.... Brian?
|
|
|
|
« Last Edit: March 04, 2009, 08:02:52 pm by Tom Simon »
|
Logged
|
|
|
|
|
Ohio Tom (DdK)
|
|
« Reply #20 on: March 04, 2009, 08:16:35 pm » |
|
One question:
How are you going to compensate for the thermal expansion of the motor?
I know it will grow in width more than 1/8".
|
|
|
|
|
Logged
|
Ohio Tom Simpson. Home of the Killa' Bee.
|
|
|
|
JVance
|
|
« Reply #21 on: March 04, 2009, 11:34:13 pm » |
|
Considering both Porsche and Subaru have had to deal with the same considerations, I'd confirm the desired cam timing at the operating temperature. If the cam timing is retarded when the engine is cold, no big deal...as long as the timing advances with expansion to where you want it to be.
|
|
|
|
|
Logged
|
Thanks Rocky Jennings, DRD, and Pauter -Stripped66
|
|
|
1946vw
Newbie
Offline
Posts: 32
|
|
« Reply #22 on: March 06, 2009, 01:29:56 am » |
|
OK Two valves, Two plugs, And they flow alot. As soon as it hits the Dyno, I will post a number or two. Brian
|
|
|
|
|
Logged
|
|
|
|
|
Old VW racer
|
|
« Reply #23 on: March 08, 2009, 12:08:02 am » |
|
Hi Tom, your correct, I was confused. Looks great Brian.
|
|
|
|
|
Logged
|
|
|
|
2275ss
Newbie
Offline
Posts: 8
|
|
« Reply #24 on: October 22, 2010, 07:01:11 pm » |
|
Any updates?
|
|
|
|
|
Logged
|
|
|
|
|
marty hiskey
|
|
« Reply #25 on: October 26, 2010, 09:01:16 pm » |
|
wow that is some serious stuff right there. very nice work. the twin spinning arrows cnc'd into the timing belt/chain cover look like detroit diesel logo's. i love seeing people trying to invent something way out of the norm. great job looking forward to seeing it all run next.
|
|
|
|
|
Logged
|
|
|
|
|
