PIX, Pix Of Enlightenment Options

[veekry9]

I recalled an animation from a few yrs ago.


https://www.youtube.com/watch?v=wh7J8DSDZAg


edit:this animation shows the crank in an interspersed configuration.
a 4cyl crank in the middle,another split and joined at each end,hence the harmonics.
The successful 908 crank is 2 4cyl cranks joined at 90* angle.

http://www.jabiru.net.au/



Engine Features
4 Stroke
3300cc (200 cubic inches)
6 Cylinder Horizontally Opposed
1 Central Camshaft
Fully Machined Aluminium Alloy Crankcase
Over Head Valves (OHV) - Push Rod Operated
Ram Air Cooled
Wet Sump Lubrication - 4 litre capacity
Direct Propeller Drive
Dual Transistorised Magneto Ignition
Integrated AC Generator
Electric Starter
Mechanical Fuel Pump
Naturally Aspirated - 1 Pressure Compensating Carburetor


This is the 5L -8
It is,at this date out of production.



http://en.wikipedia.org/wiki/Jabiru_5100

https://www.google.ca/webhp?sourceid=chrome...8#q=jabiru+5100

The 8 sounds real good

For those who aren't moneyshy,not cheap.
High quality,aero-style.

see more:
http://www.914world.com/bbs2/index.php?showtopic=250515

animation of types:

https://www.youtube.com/watch?v=hvpFcSPtDV0

nice work.

[Dr Evil]

Aircraft engines are not good candidates for car engines. They do not rev the same and the cams are meant to get power in a narrow band. Same is true for a converted corvair engine.

[veekry9]

Aircraft engines are not good candidates for car engines. They do not rev the same and the cams are meant to get power in a narrow band. Same is true for a converted corvair engine.

Oh Yeah.
The aircraft billet engine is for aircraft,that said,the idea that the average m/c shop
equipped with modern tools can crank out specials is valid.
I'm still hankering for the 4valve heads that Martin Bott developed for T4's
The Jabiru from Oz isn't the only fully cnc'd engine type.


https://www.youtube.com/watch?v=QsmiIeAkE-o

F1?Prostock?Prototype
/
http://rennlist.com/forums/911-forum/93509...ne-cases-2.html
/

[veekry9]

A fellow up here in Ontario,also known as TasmanDevil.
Unrecognisable as a Fiero.TPI V8 Transverse.
Gorgeous Paint(Jag BlackCherry Metallic)Full Leather.
Absolutely Impeccable.
http://www.fiero.nl/cgi-bin/fiero/Ultimate.cgi
For those of you interested in an American MidEngine as a 2nd car,and an object of worship on the alter of the jackstands.

/

[Dave_Darling]

Unrecognisable as a Fiero.

Unrecognizable? "Fiero" was the first thing that went through my head when I looked at the picture...

--DD

[Dr Evil]

What pic? That link takes me to a list with no pics

[Dr Evil]

Never mind, the Fiero pic loaded in the thread. I looks like a Fiero (IMG:style_emoticons/default/confused24.gif)

[veekry9]

UhHuh.
So it's true then,a leopard can't change it's spots.
But a V8 into a 914 or Fiero can enhance your power trip.
An entire aftermarket exists for your personal magic carpet.
Some parts not included.
Some assembly required.
The lowly Fieros and 914s made new and improved.

https://www.youtube.com/watch?v=UtkP5gTX6Hc

[veekry9]

Any Takers here?
Quote
Flat 8 Porsche Engine
A mate is making a flat 8 engine for a replica 908. He has used two 2.7lt magnesium blocks that we wirecut at my work and has welded them together in a jig. First time he has welded mag and it is a steep learning curve with the pre heating/jigging and post stress relieving. Here are the photos of his second attempt. He still has 1mm of bend after welding but is making a different jig that will be stronger and keep the heat more stable (he was saying 5 mins after welding and it was cool enough to handle).
Unquote


http://performanceforums.com/forums/showth...-Porsche-Engine

from '11

[Woody]

Any Takers here?
Quote
Flat 8 Porsche Engine
A mate is making a flat 8 engine for a replica 908. He has used two 2.7lt magnesium blocks that we wirecut at my work and has welded them together in a jig. First time he has welded mag and it is a steep learning curve with the pre heating/jigging and post stress relieving. Here are the photos of his second attempt. He still has 1mm of bend after welding but is making a different jig that will be stronger and keep the heat more stable (he was saying 5 mins after welding and it was cool enough to handle).
Unquote


http://performanceforums.com/forums/showth...-Porsche-Engine

from '11

Why not use an aluminum case?

[balljoint]

I looks like a Fiero (IMG:style_emoticons/default/confused24.gif)

(IMG:style_emoticons/default/idea.gif)

Yes. Yes, you do.

[Dave_Darling]

Because RACECAR!! (Mag is lighter.)

--DD

[veekry9]

Found some old links re:flat-8 at PerformanceForums

http://jalopnik.com/5799726/emerson-...kswagen-beetle


https://www.youtube.com/watch?v=tXKcpbFF7WI

"Excellent, the pressure is great, Today is March 19th, 2009, and tomorrow, we will be recorded for the show,
'Auto Esporte'. Good work Marco, Good work Arlindo"


https://www.youtube.com/watch?v=Zto2UDCUyoY

The vids have be online a few years.
These guys make it look easy.Wanted a Flat-8,Made one.


https://www.youtube.com/watch?v=nF9j6G4bkZg


(IMG:style_emoticons/default/smilie_flagge24.gif)

[veekry9]

Some headway's been made

Custom flat-8 crank from Oz.





http://www.performanceforums.com/forums/sh...he-Engine/page2

Can't be cheap.
Building a 908 tribute from scratch,to a fine resolution.

[veekry9]

Fer sail

Wider to fit,with or without flares.

early corsa

late corsa 8
(what a '77 914/911/944 morph looks like)


nice crank.corvair aero app
they are able to do -8's
to similar specs 2.5K+
/

[billh1963]

Any progress on welding the 2.7 cases together?

[veekry9]

billh1963:
I looked at the performanceforum thd recently,and from what was described the case weldment requires further welding.
Magnesium castings are no doubt difficult to do to a machined tolerance.He was able to get within 1mm(0.039")runout through the mains bores,
which all things considered,is a notable success.So,some layup on the mainbores and parting faces to be remachined,to straighten it up X2.
A ton of very difficult work.Inspired by their efforts,a minor change in plans will be applied to my own P14.
The intent was to run the 2L until I found some issues with the valve guides,and since I now have the Corvair 6's,I believe the initial cost of a 14-6 will be tolerable,
originality deferred temporarily.The idea of creating a flat 8 using Corvair blocks welded and machined can't possibly be original,though the net has not revealed an attempt.
The CNC shop doing the billet corvair cranks are a likely source for a 90-degree 8 pin crank.A fewer number of main bearing pins may be a serious problem for the
vibration characteristics of such a long crank.More research is needed.
Here is a site (edit:11/05//15(http://www.pattakon.com/))that makes balance software available.
The Porsche drawing I've posted here shows the 90 degree pins interspersed with the 0 degree pins.
The 2 billet cranks made in Australia appear to be the other method,which I believe is the solution Porsche used to tame the harmonic vibrations inherent with the original design.
The price of a crank made to these specs is not cheap,so what to do if you're really hankering for a flat 8?Cut weld...? (IMG:style_emoticons/default/lol-2.gif)
Seriously,a talented welder with some rod may git er done.A lot of work.

[veekry9]

OK.here's the plan..
Get 2 sets of cases,and weld them together after machining the front and rear off each respective set.
Front 2 and rear 2.Makes a long case to carry 8 cylinders.
Look,if the guy in Aus can weld magnesium cases,it would have to be easier to do the same to 356 T6 alloy cases.
Marginally easier admittedly,but possible to achieve the exalted F-8.
Fun with TIG,in an oven,inert gas flushed...
/
(edit:08/08/16):


Samba-2-4-6-8
http://www.thesamba.com/vw/forum/viewtopic.php?t=399470


Well,the fellow in Australia has the right idea,wire edm cutting the cases to key each other together.
Still,tubular shafts,ground to the mains and cam dia +0.0004"/-0 for alignment is essential.
Otherwise,a near hopeless adventure,preparation of the weld groove is critical,minimum weld added.
Tough job,all around.For sure a worthy aspiration,wanting -8,pushrod even.More cylinders,more better.
(IMG:style_emoticons/default/biggrin.gif)


Even these cases could be sixed,356-6.Custom crossflow center head too.
(IMG:style_emoticons/default/evilgrin.gif)


A VW Boxer Six,a neato version of the Corvair engine.
Clearly,a welded crank.Note the main journal's discoloration and heat affected zone.
The -8 crank is done in a similar way,two -4 cranks welded together,90* apart.

http://carocha.forumeiros.com/t477-transfo...com-8-cilindros


Mounted Mid in a 914,this is the right side of the engine,pretty nice looking.
I want to build a few,and I know,some of you want one too.


Some real expertise demonstrated here,kudos.Note the cam nose profiles,long duration,mushroom lifters,a revver.
(IMG:style_emoticons/default/clap.gif)
/

[rick 918-S]

I like this! (IMG:style_emoticons/default/sawzall-smiley.gif) (IMG:style_emoticons/default/welder.gif)

[bulitt]

There was a guy....on Ferrari chat with some amazing machinist and tig welding skills, and allot of energy. He decided to make his own 12 cylinder engine. He had a machine shop in his basement. The thread ran for years. It blew up.

So I think it is cool you are attempting this, and wish you the best of luck! You may want to try and source every existing part that would fit and design around them.

Me, I would just drop an LS engine in there. But I seriously get where you are coming from!

Here is the thread. It's 101 pages long. It will suck you in! And, there is no ending because some nastiness occurred and the admins shut it down.

http://www.ferrarichat.com/forum/308-328/1...ion-begins.html