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 )

3 Pages V  1 2 3 >  
 Reply to this topicStart new topic
> Custom Suspensions, Need info on Dual A-Arms or 5Link setups?
914_1.8t
post May 6 2011, 06:07 PM
Post #1


Member
**

Group: Members
Posts: 302
Joined: 3-June 04
From: East Bay
Member No.: 2,149
So, I'm in the process of aquiring a 914 project and am trying to plan as far forward as possible, In particular the suspension.

Plan is to modify the trailing arms and turn them into either a 5-Link suspension or uneven length A-Arms. I'm looking for any pics or details on those who have gone this route.

In particular, with an dual A-Arm setup in the rear, what lengths/angles should I use for the A-Arms? What about 5-link? I know the question is a bit vague and I don't have many details at the moment but I'll be working towards finalizing something soon. Appreciate any feedback and PICS.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
VaccaRabite
post May 6 2011, 06:12 PM
Post #2


En Garde!
**********

Group: Admin
Posts: 13,616
Joined: 15-December 03
From: Dallastown, PA
Member No.: 1,435
Region Association: MidAtlantic Region
Are you going tube frame or something?

What you are describing is... not easy.

Zach
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
914_1.8t
post May 6 2011, 06:18 PM
Post #3


Member
**

Group: Members
Posts: 302
Joined: 3-June 04
From: East Bay
Member No.: 2,149
QUOTE(Vacca Rabite @ May 6 2011, 05:12 PM) *

Are you going tube frame or something?

What you are describing is... not easy.

Zach

Yes, tube frame and not expecting easy (IMG:style_emoticons/default/smile.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
bondo
post May 6 2011, 06:35 PM
Post #4


Practicing my perpendicular parking
****

Group: Members
Posts: 4,277
Joined: 19-April 03
From: Los Osos, CA
Member No.: 587
Region Association: Central California
I wouldn't do the rear... unless you plan to put the transmission someplace else. (IMG:style_emoticons/default/smile.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
914_1.8t
post May 6 2011, 06:51 PM
Post #5


Member
**

Group: Members
Posts: 302
Joined: 3-June 04
From: East Bay
Member No.: 2,149
QUOTE(bondo @ May 6 2011, 05:35 PM) *

I wouldn't do the rear... unless you plan to put the transmission someplace else. (IMG:style_emoticons/default/smile.gif)

I'm thinking something along these lines:


Attached image(s)
Attached Image Attached Image
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Chris Hamilton
post May 6 2011, 07:00 PM
Post #6


Senior Member
***

Group: Members
Posts: 611
Joined: 7-March 06
From: Berkeley, CA
Member No.: 5,687
Where are those photos from?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
bondo
post May 6 2011, 07:41 PM
Post #7


Practicing my perpendicular parking
****

Group: Members
Posts: 4,277
Joined: 19-April 03
From: Los Osos, CA
Member No.: 587
Region Association: Central California
Wow, somebody did it! (or at least started doing it)

I'm skeptical that by the time you make the compromises necessary to get it into the available space you would have any measurable performance benefit. Of course if you go mega-widebody anything is possible (IMG:style_emoticons/default/smile.gif)
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
rohar
post May 6 2011, 08:45 PM
Post #8


Senior Member
***

Group: Members
Posts: 924
Joined: 25-October 08
From: spokane
Member No.: 9,685
Region Association: None
I've thought of just grabbing one of these, some 1" 16 gauge and a welder. Move everything that's in the way and stick it in:

(IMG:http://www.914world.com/bbs2/uploads_offsite/www.supermotors.net-9685-1304736318.1.jpg)

It's a touch wider than stock track but should fit nicely under flares. $300 at the local pick and pull. Maybe after the engine conversion is done.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
quadracerx
post May 6 2011, 09:03 PM
Post #9


Member
**

Group: Members
Posts: 427
Joined: 3-July 06
From: WA
Member No.: 6,366
Region Association: Pacific Northwest
So what is that suspension from? I cant really tell if it has provisions for the CV Shafts or what? But Im old and blind too....

Looks like fun though....

Steve
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
bam914
post May 6 2011, 09:15 PM
Post #10


Member
**

Group: Members
Posts: 342
Joined: 23-November 03
From: Atlanta, Ga
Member No.: 1,378
Region Association: None
Looks like a Miata rear suspension
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
rohar
post May 6 2011, 09:34 PM
Post #11


Senior Member
***

Group: Members
Posts: 924
Joined: 25-October 08
From: spokane
Member No.: 9,685
Region Association: None
Yup, Miata. It's been a while since I worked on 'em, but from memory they should come pretty close to fitting around the 901 tranny. The locost guys have been working with miata rear suspension and worked up their own rear framing diagrams. I'll see if I can't find them.

Hubs might get a bit sketchy...
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
andys
post May 6 2011, 09:44 PM
Post #12


Advanced Member
****

Group: Members
Posts: 2,165
Joined: 21-May 03
From: Valencia, CA
Member No.: 721
Region Association: None
If you graft in a Boxster suspension and 5 speed trans, it will bolt up to that 1.8T....if that's indeed the power plant you're looking to do. I seem to recall someone doing one, but was pretty secretive about it.

byndbad914 has a tube framed A arm suspended racer (with SBC). Though he recently re-configured the suspension, it originally had a 5 link rear.

Andys
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
enderw88
post May 6 2011, 10:32 PM
Post #13


Newbie
*

Group: Members
Posts: 35
Joined: 20-April 11
From: Tucson, AZ
Member No.: 12,960
Region Association: Southwest Region
QUOTE(rohar @ May 6 2011, 08:34 PM) *

Yup, Miata. It's been a while since I worked on 'em, but from memory they should come pretty close to fitting around the 901 tranny. The locost guys have been working with miata rear suspension and worked up their own rear framing diagrams. I'll see if I can't find them.

Hubs might get a bit sketchy...



I have accurate drawings of the Miata front and rear suspensions in the drawings section of my website.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
rohar
post May 6 2011, 10:33 PM
Post #14


Senior Member
***

Group: Members
Posts: 924
Joined: 25-October 08
From: spokane
Member No.: 9,685
Region Association: None
If I had unlimited funds, I'd go the boxster route. Use the boxster cross brace as a jig for a custom fit brace with the same suspension points contoured to the 914 chassis.

I'm already converting to an audi box so this seems the obvious next step.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
914_1.8t
post May 6 2011, 11:23 PM
Post #15


Member
**

Group: Members
Posts: 302
Joined: 3-June 04
From: East Bay
Member No.: 2,149
QUOTE(Chris Hamilton @ May 6 2011, 06:00 PM) *

Where are those photos from?

Think I got them from this site some time ago?

I'm trying to look at other cars to figure out how to design it...trying to find software online that is cheap and free with no/minimal luck. Theres Wingeo3 but susprog3 but they are not free/cheap.

Basically plan so far is to modify the trailing arm as in the pics and figure out suspension geometry from there...legth/angle of upper and lower control arms in order to get good handling. Was hoping someone may have gone this route and have some data.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Jeff Hail
post May 7 2011, 12:21 AM
Post #16


Senior Member
***

Group: Members
Posts: 1,141
Joined: 3-May 07
From: LA/ CA
Member No.: 7,712
Go for it!!

Boxster rear suspension with the crossmember can be adapted to fit a 914 with substancial modifications. All considering it is an extremely light weight add on and the geometry is within par for the 914. These can be obtained fairly cheap from P-Car dismantlers.

The front end is a different animal. Best investment is going with coil over shocks and ERP 935 setup. Not cheap but the best bang for the buck.
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
914_1.8t
post May 7 2011, 11:36 AM
Post #17


Member
**

Group: Members
Posts: 302
Joined: 3-June 04
From: East Bay
Member No.: 2,149
QUOTE(andys @ May 6 2011, 08:44 PM) *

If you graft in a Boxster suspension and 5 speed trans, it will bolt up to that 1.8T....if that's indeed the power plant you're looking to do. I seem to recall someone doing one, but was pretty secretive about it.

byndbad914 has a tube framed A arm suspended racer (with SBC). Though he recently re-configured the suspension, it originally had a 5 link rear.

Andys

I had done the 1.8t swap about 5 years ago in my old...audi/vw long motors/trans can be mounted to boxster engine/trans. I actually used a pasat/a4 fwd teams last time with boxter cable shifter and early 911 axles & hubs (with spacer at trans). New setup will be 2.7t with single turbo/o1e 6spd.

Ideally, if like to able to find a spindle (dual a-arm type) to use (and find some oem axles) and possiblyuse stock a-arms , figure out the geometry and design the frame of the car around that.

Boxster may be best way to go?
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
andys
post May 7 2011, 12:24 PM
Post #18


Advanced Member
****

Group: Members
Posts: 2,165
Joined: 21-May 03
From: Valencia, CA
Member No.: 721
Region Association: None
Doing a double A arm front suspension takes quite a bit work to get everything to work in concert. If you retrofit an existing stock suspension from car X, you may be limited with making adjustments which might evolve into significant mod's later on. An adjustable suspension would be far more forgiving and lend itself to moving things around to get the right geometry. You might look at the A arm offerings from UBC Machine (stock car stuff, and it's cheap.). That said however, I might be inclined to stay with the stock Porsche front strut to keep things simple. A lot delends on your goals, IMO.

Andys
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
roadster fan
post May 7 2011, 02:16 PM
Post #19


Project Frankenstein !!!!!!!!
***

Group: Members
Posts: 1,009
Joined: 24-November 05
From: Aptos, CA
Member No.: 5,184
Region Association: Northern California
QUOTE(Chris Hamilton @ May 6 2011, 06:00 PM) *

Where are those photos from?


Those pics are from member Slugmika's build of his 914 race car. The thread is here: slugmika build

Has some interesting fabrication and suspension stuff on that car.

Jim
User is offlineProfile CardPM
Go to the top of the page
+Quote Post
Dave_Darling
post May 7 2011, 04:49 PM
Post #20


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

Group: Members
Posts: 15,063
Joined: 9-January 03
From: Silicon Valley / Kailua-Kona
Member No.: 121
Region Association: Northern California
Someone has put a 993 rear suspension, complete with subrame, into a 914 before. I think it may have been Ron Mistak in his 911GT-1 clone 914-6 racer. It was pretty darned cool, and the cast aluminum subframe is unmistakeable.

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

3 Pages V  1 2 3 >
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: 27th December 2024 - 05:48 AM
Invision Power Board v9.1.4 © 2024  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 ...