Suspension swap, Swap 911/930 front suspension to my 914 |
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Suspension swap, Swap 911/930 front suspension to my 914 |
spyder9014 |
Feb 9 2003, 02:14 PM
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#1
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Newbie Group: Members Posts: 2 Joined: 9-February 03 Member No.: 274 |
What are the benefits of using 911/930 front suspension on a 914.
I have installed gas shocks, turbo tie rods but I have seen it recommended to use the 930 front suspension. Is this just to get the brakes or is this for struts/brakes/torsion bars? If I upgrade the calipers and rotors will it be just as good as a complete swap? |
J P Stein |
Feb 9 2003, 02:51 PM
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#2
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Irrelevant old fart Group: Members Posts: 8,797 Joined: 30-December 02 From: Vancouver, WA Member No.: 45 Region Association: None |
Most guys do the 9eleben front end to get bigger brakes/vented rotors and 5 bolt wheels.
You can do strut only....which bolts to the 914 A arms (73 & later). You can use 911 A arms, which gives a wider selection of torsion bars. You can also use the aluminum rack support from the 911...it all bolts in. Caliper selection is very limited for the 914 struts. The caliper mount spacing is 3 inches. The 911 strut to caliper mounting is 3.5 in. |
Jeroen |
Feb 9 2003, 08:32 PM
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#3
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914 Guru Group: Members Posts: 7,887 Joined: 24-December 02 From: The Netherlands Member No.: 3 Region Association: Europe |
Early 911 struts have 3" caliper mount spacing as well
And I believe you can get torsionbars for the 914 a-arms up to 23mm cheers, Jeroen |
Mueller |
Feb 9 2003, 10:52 PM
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#4
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914 Freak! Group: Members Posts: 17,146 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None |
IMHO.....swapping over to the 930 front end and parts are really only for very serious big track guys or for bragging rights (IMG:style_emoticons/default/smile.gif)
One positive of the the 930 front hubs is that the track is two inches wider due to the hub being of a different design....this way for guys running GT flares and 15x7 or 16x7 rims you can bring the wheel further out to increase the track and fill up the fender well without using spacers. For your average Joe, regular 911 front suspension will be fine...if you want a little more, then get an SC or Carrera suspension...both of these also give you the option to easily upgrade to Big Reds or Monoblocks. |
pnewman |
Mar 4 2006, 07:20 PM
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#5
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Member Group: Members Posts: 371 Joined: 15-February 05 From: Lincolnshire, IL Member No.: 3,606 Region Association: Upper MidWest |
QUOTE(Jeroen @ Feb 9 2003, 06:32 PM) Early 911 struts have 3" caliper mount spacing as well And I believe you can get torsionbars for the 914 a-arms up to 23mm cheers, Jeroen what size torsion bars come in oem 911 a arms? 21 mm? thanks |
brant |
Mar 4 2006, 07:41 PM
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#6
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914 Wizard Group: Members Posts: 11,625 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
QUOTE(pnewman @ Mar 4 2006, 06:20 PM) QUOTE(Jeroen @ Feb 9 2003, 06:32 PM) Early 911 struts have 3" caliper mount spacing as well And I believe you can get torsionbars for the 914 a-arms up to 23mm cheers, Jeroen what size torsion bars come in oem 911 a arms? 21 mm? thanks 19mm |
pnewman |
Mar 4 2006, 09:04 PM
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#7
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Member Group: Members Posts: 371 Joined: 15-February 05 From: Lincolnshire, IL Member No.: 3,606 Region Association: Upper MidWest |
QUOTE(brant @ Mar 4 2006, 05:41 PM) QUOTE(pnewman @ Mar 4 2006, 06:20 PM) QUOTE(Jeroen @ Feb 9 2003, 06:32 PM) Early 911 struts have 3" caliper mount spacing as well And I believe you can get torsionbars for the 914 a-arms up to 23mm cheers, Jeroen what size torsion bars come in oem 911 a arms? 21 mm? thanks 19mm question: I have 180 lb rear coil springs, rear oem sway bar, front oem sway bar, and am converting to 911 struts (I was told that the struts were out of a 1988 no a arms included.) What size front torsion springs should I go with 21mm? I think that I swapt out my oem's w/ a pair of used 18 or 19 mms about 6 yrs ago. Just trying to get a good balance. Were oem torsion springs for all 911's incl. 1988 19mm? thanks, Pete (IMG:style_emoticons/default/beer.gif) |
Spoke |
Mar 4 2006, 10:37 PM
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#8
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Jerry Group: Members Posts: 6,985 Joined: 29-October 04 From: Allentown, PA Member No.: 3,031 Region Association: None |
I converted my 71 914 to 911 a-arms, torsion bars, aluminum crossmember mainly for the sway bar which fits right onto the a-arms without drop links. This configuration really stabilized body roll and firmed up the ride.
For my 74, I'm going with a complete front end from an 88 Carrera including the struts, calipers, and vented rotors, 5-lug hub, aluminum crossmember, a-arms, torsion bars, and I may even use the steering rack. Spoke Attached image(s) |
brant |
Mar 4 2006, 10:39 PM
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#9
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914 Wizard Group: Members Posts: 11,625 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
All 911's were 19mm
in fact its not even really a full 19mm its actually like 18.8 or something (while the 914 bars are 17.9mm) if you are not using the 911 A-arms then that means you are still using the 914 A-arms and thus the 18's (for example if your just changing struts) I imagine some of the really special 911's might have come with bigger bars, the turbo's might have ? but otherwise all 911's were 19mm from 1965 until 1989 brant |
army dude |
Mar 4 2006, 10:49 PM
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#10
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The answer is 42 Group: Members Posts: 218 Joined: 12-December 05 From: Sarasota, Fl Member No.: 5,265 |
(IMG:http://www.914world.com/bbs2/html/emoticons/blink.gif) OK Spoke, ya got me!! You are telling me that everything frontend wise from the 88 Carrera will BOLT IN????? Everything? Bolt in? HUH?? (IMG:http://www.914world.com/bbs2/html/emoticons/blink.gif) (IMG:http://www.914world.com/bbs2/html/emoticons/blink.gif)
So for my 74 with a v8 I could ,in effect, go to junk yard, or someone else ,get this suspension and have it done for a weekend project?? Confused in Iraq (IMG:http://www.914world.com/bbs2/html/emoticons/blink.gif) |
Aaron Cox |
Mar 4 2006, 10:59 PM
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#11
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
QUOTE(brant @ Mar 4 2006, 09:39 PM) All 911's were 19mm in fact its not even really a full 19mm its actually like 18.8 or something (while the 914 bars are 17.9mm) if you are not using the 911 A-arms then that means you are still using the 914 A-arms and thus the 18's (for example if your just changing struts) I imagine some of the really special 911's might have come with bigger bars, the turbo's might have ? but otherwise all 911's were 19mm from 1965 until 1989 brant i concur with brant... |
Dr. Roger |
Mar 4 2006, 11:00 PM
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#12
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A bat out of hell. Group: Members Posts: 3,944 Joined: 31-January 05 From: Hercules, California Member No.: 3,533 Region Association: Northern California |
yes. =-) \see my progress thread on th elast few entires. same deal. '74 even. =-) |
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Dr. Roger |
Mar 4 2006, 11:06 PM
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#13
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A bat out of hell. Group: Members Posts: 3,944 Joined: 31-January 05 From: Hercules, California Member No.: 3,533 Region Association: Northern California |
prolly swap in some new brake lines while it's apart. =-)
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brant |
Mar 5 2006, 09:24 AM
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#14
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914 Wizard Group: Members Posts: 11,625 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
Pete,
19mm would be a good match for 180 rear springs. measure what you already have. if you in fact have 17.9 then consider upgrading to 911 A-arms and T-bars while you are there... but even if you have the stock 17.9's then that is not bad with the 180's either. brant |
pnewman |
Mar 5 2006, 10:00 AM
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#15
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Member Group: Members Posts: 371 Joined: 15-February 05 From: Lincolnshire, IL Member No.: 3,606 Region Association: Upper MidWest |
QUOTE(brant @ Mar 5 2006, 07:24 AM) Pete, 19mm would be a good match for 180 rear springs. measure what you already have. if you in fact have 17.9 then consider upgrading to 911 A-arms and T-bars while you are there... but even if you have the stock 17.9's then that is not bad with the 180's either. brant Brant, Thanks for the advise on the 911 a arms. What other benefit is there for going w/ 911 a arms w/ their stock 19 mm t bars vs. going w/ (let's say) 21 mm t bars for the oem 914 a arms? note: I have compiled through hull sway bar assembly w/ all new bushings and hardware so I am not necessarilly looking to use an under body sway bar, although it seems easier to install. I have not yet removed any of my front end yet and my used front "1988 strut assemblies" come this week. I don't plan on getting to this part of the project for atleast month or two so I have time. thanks, pete |
brant |
Mar 5 2006, 10:34 AM
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#16
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914 Wizard Group: Members Posts: 11,625 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
QUOTE(pnewman @ Mar 5 2006, 09:00 AM) Brant, Thanks for the advise on the 911 a arms. What other benefit is there for going w/ 911 a arms w/ their stock 19 mm t bars vs. going w/ (let's say) 21 mm t bars for the oem 914 a arms? note: I have compiled through hull sway bar assembly w/ all new bushings and hardware so I am not necessarilly looking to use an under body sway bar, although it seems easier to install. I have not yet removed any of my front end yet and my used front "1988 strut assemblies" come this week. I don't plan on getting to this part of the project for atleast month or two so I have time. thanks, pete ok... I'll take a crack at this. bunch of random thoughts here" 911 A-arms offer no benefit in geometry or anything like that. they are splined different (for 911 bars) and there may be a tiny bit more selection in bars of that spline. overall, with either style of A-arm a through body anti-sway bar is going to give you better geometry than an underbody style. In fact for an all out track car you would really want to convert the late 911 A-arms to the through body style. both style's used early ball joints prior to 72 and late ball joints post 72. Late ball joints are theoretically better, although you don't really hear of many failure with the early style either. a 19mm torsion bar is a NICE spring rate for a street car and even track cars. A 21mm might be a tiny bit too stiff for 180lb springs, but if you have it then go ahead and give it a try.. (it shouldn't be too far off) if I were in your shoes I would base my decision upon suspension bushing condition. if your 914 a-arm has already been upgraded or had bushings replaced that is not something you would want to have to repeat on the 911 style. on the other hand, if the 911 style was cheap enough and had really good bushings in it (used) and your 914 ones were shot... then I would consider switching over. brant |
pnewman |
Mar 5 2006, 12:04 PM
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#17
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Member Group: Members Posts: 371 Joined: 15-February 05 From: Lincolnshire, IL Member No.: 3,606 Region Association: Upper MidWest |
Brant,
thanks for the info! (IMG:http://www.914world.com/bbs2/html/emoticons/biggrin.gif) I think that you have given me the info that I needed to make my decisions. I will be inspecting and measuring my stuff over the next couple of weeks. I cannot stress enough how appreciated your input is. Pete (IMG:http://www.914world.com/bbs2/html/emoticons/pray.gif) |
pnewman |
Mar 25 2006, 08:28 PM
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#18
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Member Group: Members Posts: 371 Joined: 15-February 05 From: Lincolnshire, IL Member No.: 3,606 Region Association: Upper MidWest |
Brant,
Final front end suspension. 1988 struts New pads, bearings, seals, and flex hoses New Zimmerman cross drilled rotors. I am painting the rotor hats red. 1988 calipers rebuilt and painted red koni adjustable red inserts new 197? 911 a arms w/ the old through body tabs for my oem through body sway bar. - My car didn't come with one thus I will be installing that too. - I kept the bushings and front and rear brackets from the 88' 911 a-arms as they were in much better shape. I don't like the poly or bronze? bushings as I personally find them to loud as far as transfering vibration. I have 2 different through body sway bars one oem diameter and another a monster. my old 74' 914 cross bar in great shape. turbo tie rods bump steer kit all rusty old parts have been dropped off for bead blasting and powder coating in gloss black. I will post pics when all is assembled. Pete |
brant |
Mar 25 2006, 09:33 PM
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#19
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914 Wizard Group: Members Posts: 11,625 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains |
sounds like you've worked your butt off...
thats a ton of work. would love to see the pics when you get to it. brant |
Eric_Shea |
Mar 25 2006, 10:14 PM
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#20
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PMB Performance Group: Admin Posts: 19,275 Joined: 3-September 03 From: Salt Lake City, UT Member No.: 1,110 Region Association: Rocky Mountains |
Bolt on Army Dude, Bolt on.
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