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 )

 
 Reply to this topicStart new topic
> 950 CC Type 4, 2 cylinder "big bore"
Al Meredith
post Jan 29 2015, 04:32 PM
Post #1


Senior Member
***

Group: Members
Posts: 973
Joined: 4-November 04
From: Atlanta, ga
Member No.: 3,061
I've wanted to do this for years! I just finished a 2 cylinder Ty 4 engine. I had a case that was not in real good shape and a couple of 1.7 heaqds that were OK. I welded up the oil holes on #2 & 4 and welded up 4 cam folowers , had the 1.7 heads fly cut for a big bore (96MM) P & C and have 1/2 of a 1911. For now and for simplicity I installed a standard 32/36 setup. I installed it om my engine start up stand and it started right up and ran fine , 60 PSI oil pressure at idle. No need to send a picture because it looks just like a regular engine although it sounds like a motorcycle.
I have a question for the forum, any suggestions on a carb set up?? I have a couple of old 1.7 bus carbs with the manifolds , I can use one of these carbs and center mount it . I can just continue to use the 32 MM weber and block off the 36 MM side??? any help. AL
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
76-914
post Jan 29 2015, 04:48 PM
Post #2


Repeat Offender & Resident Subaru Antagonist
**********

Group: Members
Posts: 13,738
Joined: 23-January 09
From: Temecula, CA
Member No.: 9,964
Region Association: Southern California
You might get some info from Leonard Millholand, if he is still around. He was doing that for years. Google "the legal eagle light plane". He also used to say "don't cut that case" or advertised as the "better 1/2". Good luck! (IMG:style_emoticons/default/beerchug.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mueller
post Jan 29 2015, 05:16 PM
Post #3


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

Group: Members
Posts: 17,155
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None
Neat, however you need to take it to the next level!


http://thekneeslider.com/ducati-v-one-twin...gle-conversion/

Convert those other 2 cylinders into a supercharger!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
SirAndy
post Jan 29 2015, 06:37 PM
Post #4


Resident German
*************************

Group: Admin
Posts: 42,257
Joined: 21-January 03
From: Oakland, Kalifornia
Member No.: 179
Region Association: Northern California
QUOTE(Mueller @ Jan 29 2015, 03:16 PM) *
Neat, however you need to take it to the next level!
Convert those other 2 cylinders into a supercharger!

(IMG:style_emoticons/default/agree.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Elliot Cannon
post Jan 29 2015, 08:06 PM
Post #5


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
Do you have pictures, or are you just making shit up? (IMG:style_emoticons/default/av-943.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
siverson
post Jan 29 2015, 08:08 PM
Post #6


Advanced Member
****

Group: Benefactors
Posts: 2,458
Joined: 5-May 03
From: San Diego, CA
Member No.: 654
Region Association: Southern California
> No need to send a picture

WHAT?!?!?!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
siverson
post Jan 29 2015, 08:09 PM
Post #7


Advanced Member
****

Group: Benefactors
Posts: 2,458
Joined: 5-May 03
From: San Diego, CA
Member No.: 654
Region Association: Southern California
(IMG:style_emoticons/default/thisthreadisworthlesswithoutpics.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
poorsche914
post Jan 29 2015, 08:19 PM
Post #8


T4 Supercharged
****

Group: Members
Posts: 3,139
Joined: 28-May 09
From: Smoky Mountains
Member No.: 10,419
Region Association: South East States
> No need to send a picture

Perhaps not a picture but how about a video? (IMG:style_emoticons/default/idea.gif)

(IMG:style_emoticons/default/driving.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mark Henry
post Jan 30 2015, 07:59 AM
Post #9


that's what I do!
***************

Group: Members
Posts: 20,065
Joined: 27-December 02
From: Port Hope, Ontario
Member No.: 26
Region Association: Canada
I take it that this is for a kit plane?
Wouldn't heavier T4 case, welding up the holes on a full case and a full crank make for a heavy engine?
Do you cut the heads in half?
I don't get the purpose....

(IMG:style_emoticons/default/confused24.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mueller
post Jan 30 2015, 09:36 AM
Post #10


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

Group: Members
Posts: 17,155
Joined: 4-January 03
From: Antioch, CA
Member No.: 87
Region Association: None
I guess you could also convert it into a portable gas powered air compressor!
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
MJHanna
post Jan 30 2015, 09:41 AM
Post #11


Does this 911 make my butt look big?
***

Group: Members
Posts: 806
Joined: 23-January 03
From: Lowry Crossing, Texas
Member No.: 185
On the one I built I just cut a Weber in 2 and used it. (IMG:style_emoticons/default/w00t.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Mark Henry
post Jan 30 2015, 10:45 AM
Post #12


that's what I do!
***************

Group: Members
Posts: 20,065
Joined: 27-December 02
From: Port Hope, Ontario
Member No.: 26
Region Association: Canada
QUOTE(Mueller @ Jan 30 2015, 10:36 AM) *

I guess you could also convert it into a portable gas powered air compressor!

But wouldn't you keep the extra 2 cylinders (IMG:style_emoticons/default/confused24.gif)
There used to be a type one kit to do this:

http://www.thesamba.com/vw/forum/viewtopic...098&start=0
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Al Meredith
post Jan 30 2015, 11:44 AM
Post #13


Senior Member
***

Group: Members
Posts: 973
Joined: 4-November 04
From: Atlanta, ga
Member No.: 3,061
My initial plan was to use this as an emergancy power unit for use due to a power failior. After I looked into the cost of 3K to 5K generators I'm loosing interest. New generators cost more than you can buy a Chinese power unit with a 6 HP motor . I;m now thinking of buying a 914 tub and installing this 2Cylinder and see if I can 40MPG. OH no need for a picture since with the tin on it looks the same as any T4. Al
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
stugray
post Jan 30 2015, 01:08 PM
Post #14


Advanced Member
****

Group: Members
Posts: 3,825
Joined: 17-September 09
From: Longmont, CO
Member No.: 10,819
Region Association: None
QUOTE(Mueller @ Jan 29 2015, 04:16 PM) *

Neat, however you need to take it to the next level!


http://thekneeslider.com/ducati-v-one-twin...gle-conversion/

Convert those other 2 cylinders into a supercharger!


I thought about this very idea and was considering seeing what Jake thought.

If you take a 6 cyl, and put the smallest jugs on the outer 4 cyls, and the biggest jugs you can get on the middle two cylinders,
Then you make some custom heads & cams that use the middle two cylinders as a supercharger.
Each compression stroke, one center cyl would force the intake air charge into the outer cylinders alternating forward/rear on alternating cycles.

So you would convert a 6cyl into an internally supercharged 4 cyl.

I did the calcs once on commercially available jugs and I think the boost was over 6PSI which is ballpark "worth it" as an experiment.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Al Meredith
post Jan 30 2015, 02:40 PM
Post #15


Senior Member
***

Group: Members
Posts: 973
Joined: 4-November 04
From: Atlanta, ga
Member No.: 3,061
I was at Chuck Becks (beck speedster and beck 550) house about 5 years ago and saw a 4 cylinder 911 engine he made many years ago. I heard that he sold it.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Dave_Darling
post Jan 30 2015, 04:32 PM
Post #16


914 Idiot
***************

Group: Members
Posts: 15,200
Joined: 9-January 03
From: Silicon Valley / Kailua-Kona
Member No.: 121
Region Association: Northern California
Al, that was probably a "Polo motor". Google that and you'll see a bunch of those, they are popular with some of the 356 and 912 guys nowadays.

--DD
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
« Next Oldest · 914World Garage · Next Newest »
 

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: 12th July 2025 - 10:51 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 ...