Home  |  Forums  |  914 Info  |  Blogs
 
914World.com - The fastest growing online 914 community!
 
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG. This site is not affiliated with Porsche in any way.
Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners.
 

Welcome Guest ( Log In | Register )

6 Pages V « < 3 4 5 6 >  
 Reply to this topicStart new topic
> Anyone tried an aircooled Flat 8, With two fours?
alpha434
post Feb 27 2006, 09:22 PM
Post #81


My member number is no coincidence.
****

Group: Members
Posts: 3,154
Joined: 16-December 05
From: Denver, CO
Member No.: 5,280
Region Association: Rocky Mountains
QUOTE (lapuwali @ Feb 27 2006, 07:18 PM)
The wackiest design I've seen was a "V8" made by simply gearing the output shafts of two complete ZX-9 engines together to a common output shaft (one through an idler), with the engines sitting "cheek to cheek". This made complete engine changes very easy, as long as you had a supply of used ZX-9 engines. It was very wide, but was built for a class of sportcar racing that required two side-by-side seats, anyway, so the width wasn't a problem. I believe a pair of ZX-12 engines were used by the same guy in a different car.

Like a W12?

Where do you guys find that stuff? These are Formula classes? All we have around here is SCCA.... F. Vee and Mazda star stuff.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Brett W
post Feb 27 2006, 09:23 PM
Post #82


Advanced Member
****

Group: Members
Posts: 2,859
Joined: 17-September 03
From: huntsville, al
Member No.: 1,169
Region Association: None
Sorry I was referring to a 180 degree V8. Don't know much about the flat 8. I would guess it would be pretty close to balanced.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
JmuRiz
post Feb 28 2006, 09:31 AM
Post #83


914 Guru
*****

Group: Members
Posts: 5,584
Joined: 30-December 02
From: NoVA
Member No.: 50
Region Association: MidAtlantic Region
QUOTE (DuckRyder @ Jan 31 2005, 03:45 PM)
QUOTE (jwalters @ Jan 31 2005, 04:47 PM)
Ala Ducati--if the Duc had four cylinders.......

Trying to make a desmo valve system work without overhead cams would be ... probably impossible.

Once you've adjusted the valves on one, you won't ever try to convert something TO Desmo.

And there is a 4 cylinder Ducati, the DesmoDeci (vs DesmoDue)

Well, there are a zillion styles of demodromic valvetrains. I came across this site a while back, TONS of info, movies and pics of different systems. You can have gear driven valves w/o OHC engine...it's just not as easy (IMG:http://www.914world.com/bbs2/html/emoticons/wink.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
r_towle
post Jul 21 2012, 04:37 PM
Post #84


Custom Member
***************

Group: Members
Posts: 24,705
Joined: 9-January 03
From: Taxachusetts
Member No.: 124
Region Association: North East States
It's time for this to finally happen
Parts heading to the machine shop with a goal of a spring firing
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sixnotfour
post Jul 21 2012, 05:26 PM
Post #85


914 Wizard
**********

Group: Members
Posts: 10,905
Joined: 12-September 04
From: Life Elevated..planet UT.
Member No.: 2,744
Region Association: Rocky Mountains
wow a Aircooled Pushrod Flat 8
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
seanery
post Jul 21 2012, 05:45 PM
Post #86


waiting to rebuild whitey!
***************

Group: Retired Admin
Posts: 15,857
Joined: 7-January 03
From: Indy
Member No.: 100
Region Association: None
QUOTE(r_towle @ Jan 28 2005, 02:49 PM) *

Has anyone tried to build a flat 8 with two type 4 motors?

Theoretical questions.
Assumptions
2 motors each producing 100 HP and 100 Lb/ft of Torque

The motors are end to end, front to rear.
The cranks are fastened together either bolted or welded.

1) Would you get 200hp and 200 lb/ft or torque? or is there some multiplier...seems like you would produce more torque..

2) could it be done with a single ignition system available for sale off the shelf.

3) could you do it without two distributors? crank fired ignition system..I am thinking that there could be a wheel placed in between the motors to give you something to time from.

4) I am assuming either a nice FI system, or four carbs.

Has anyone done this?
I would like to see some articles or web pages if this has been done in the aircooled world...

Thanx in advance
Rich


And I'm crazy for wanting to put a 928 in an old GMC? (IMG:style_emoticons/default/shades.gif) (IMG:style_emoticons/default/biggrin.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
r_towle
post Jul 21 2012, 05:48 PM
Post #87


Custom Member
***************

Group: Members
Posts: 24,705
Joined: 9-January 03
From: Taxachusetts
Member No.: 124
Region Association: North East States
Yes, you are.
At least it am staying in the family.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
BigD9146gt
post Jul 21 2012, 06:02 PM
Post #88


OCD member
**

Group: Members
Posts: 376
Joined: 24-January 05
From: Sydney, Australia
Member No.: 3,502
Region Association: Australia and New Zealand
Theres a guy down in Melbourne who has made flat 8's out of 6's, says they are really easy and has moulds for the 908 style fan shrouds... problem is my last boss has been trying to get parts off him for some years now. This is one of my all time projects I wish to make. Cudo's to you for trying it with the type 4 stuff... will be fun to fallow your progress.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
rick 918-S
post Jul 21 2012, 06:07 PM
Post #89


Hey nice rack! -Celette
***************

Group: Members
Posts: 21,008
Joined: 30-December 02
From: Now in Superior WI
Member No.: 43
Region Association: Northstar Region
Totally do-able with some planning. I'll be watc (IMG:style_emoticons/default/popcorn[1].gif) hing this one!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Woody
post Jul 21 2012, 07:43 PM
Post #90


Sandbox Rabblerouser and head toilet scrubber
****

Group: Members
Posts: 3,858
Joined: 28-December 10
From: San Antonio Texas
Member No.: 12,530
Region Association: Southwest Region
(IMG:style_emoticons/default/popcorn[1].gif) (IMG:style_emoticons/default/popcorn[1].gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
jwhcars
post Jul 21 2012, 08:58 PM
Post #91


Member
**

Group: Members
Posts: 76
Joined: 25-February 07
From: Central Pa
Member No.: 7,563
The 2 factory 914/8 cars had 908 engines in them. The orange one had the full race MFI engine, and the grey one had carbs and was de-tuned for street duty.
There is one in the Porsche museum.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Dr Evil
post Jul 21 2012, 09:11 PM
Post #92


Send me your transmission!
***************

Group: Members
Posts: 23,041
Joined: 21-November 03
From: Loveland, OH 45140
Member No.: 1,372
Region Association: MidAtlantic Region
(IMG:style_emoticons/default/popcorn[1].gif) I will be doing this someday if no one else does...probably even if they do.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sixnotfour
post Jul 21 2012, 09:17 PM
Post #93


914 Wizard
**********

Group: Members
Posts: 10,905
Joined: 12-September 04
From: Life Elevated..planet UT.
Member No.: 2,744
Region Association: Rocky Mountains
Doc you should do a flat 12 Covair






V16 inspiration
http://www.gtspirit.com/2012/02/01/video-c...ith-v16-engine/
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sixnotfour
post Jul 21 2012, 09:33 PM
Post #94


914 Wizard
**********

Group: Members
Posts: 10,905
Joined: 12-September 04
From: Life Elevated..planet UT.
Member No.: 2,744
Region Association: Rocky Mountains
(IMG:style_emoticons/default/beer3.gif)

and these heads;

http://members.home.nl/r.vd.meulen/photopa...pics/dist07.jpg


Attached image(s)
Attached Image Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
sixnotfour
post Jul 21 2012, 09:48 PM
Post #95


914 Wizard
**********

Group: Members
Posts: 10,905
Joined: 12-September 04
From: Life Elevated..planet UT.
Member No.: 2,744
Region Association: Rocky Mountains
http://home.swipnet.se/motor/custom/
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
seanery
post Jul 22 2012, 06:04 AM
Post #96


waiting to rebuild whitey!
***************

Group: Retired Admin
Posts: 15,857
Joined: 7-January 03
From: Indy
Member No.: 100
Region Association: None
QUOTE(jwhcars @ Jul 21 2012, 10:58 PM) *

The 2 factory 914/8 cars had 908 engines in them. The orange one had the full race MFI engine, and the grey one had carbs and was de-tuned for street duty.
There is one in the Porsche museum.


There are two in the Porsche museum (IMG:style_emoticons/default/wink.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mueller
post Apr 13 2018, 07:43 PM
Post #97


914 Freak!
***************

Group: Members
Posts: 17,155
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None
Back to the flat 8 talk....

Found out Ferrari uses flat-plane crankshafts in some of their V8's so I went on eBay and voila... I found this crank from a 328, 73mm stroke instead of the Porsche 908 66mm stroke.

Guy wanted $850 plus shipping, I offered about half that, he didn't quite tell be to F off, but I think he wanted to with his response, asked me to call if serious.

Anyway, while not as accurate as the 908 crank it seems like a cheap alternative.

Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Elliot Cannon
post Apr 13 2018, 10:12 PM
Post #98


914 Guru
*****

Group: Retired Members
Posts: 8,487
Joined: 29-December 06
From: Paso Robles Ca. (Central coast)
Member No.: 7,407
Region Association: None
There was a guy, Richard I think, who used to show up at the G&R all the time who planned to build an 8 cyl. type IV. Richard are you out there?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
billh1963
post Apr 14 2018, 04:41 AM
Post #99


Car Hoarder!
****

Group: Members
Posts: 3,408
Joined: 28-March 11
From: North Carolina
Member No.: 12,871
Region Association: South East States
Isn't there a guy working on casting new 3.6 cases? Maybe he could cast one for an 8
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
DRPHIL914
post Apr 14 2018, 05:47 PM
Post #100


Dr. Phil
*****

Group: Members
Posts: 5,828
Joined: 9-December 09
From: Bluffton, SC
Member No.: 11,106
Region Association: South East States
QUOTE(billh1963 @ Apr 14 2018, 06:41 AM) *

Isn't there a guy working on casting new 3.6 cases? Maybe he could cast one for an 8

i cant even begin to imagine what that would cost!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

6 Pages V « < 3 4 5 6 >
Reply to this topicStart new topic
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:

 

Display Mode: Standard · Switch to: Linear+ · Switch to: Outline

Track this topic · Email this topic · Print this topic · Subscribe to this forum

- Lo-Fi Version Time is now: 4th July 2025 - 09:22 AM
Invision Power Board v9.1.4 © 2025  IPS, Inc.
All rights reserved 914World.com © since 2002
914World.com is the fastest growing online 914 community!
We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ...