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> Talk torsions and springs.
gnomefabtech
post Mar 21 2025, 11:20 AM
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Hello all-

So, I'm finally able to turn my attention to the suspension on my car now that it's running.

The car was hacked for a v8 when I got it and I have instead done my Hayabusa engine swap. I'll have to make a separate thread on the adaptor setup, but it's mounted north south and uses the original 901 trans. Dynos at about 300whp with turbo. 2k lbs overall weight. Narrow body.

The PO added some crazy stiff rear springs on coilover sleeves and they need to go. Also the front is way too stiff. It's all 911 front suspension and brake parts.

Questions:

I'm thinking about 140# springs in the back, but how long a spring should I use. 14"? 12"? Helper springs?

In the front I think it might have like 21mm bars, and that's way too stiff. Are normal 19mm 911 bars soft enough for a street driven 914? Or are there thinner 911 compatible bars?

Thanks!

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Posts in this topic
gnomefabtech   Talk torsions and springs.   Mar 21 2025, 11:20 AM
Superhawk996   Here is a question to think about If you are run...   Mar 21 2025, 11:53 AM
JamesM   Here is a question to think about If you are ru...   Mar 23 2025, 03:26 PM
Root_Werks   I went down to 110lb springs in the rear of my six...   Mar 21 2025, 11:59 AM
Shivers   @gnomefabtech Hey dude, I’m from LA and know t...   Mar 21 2025, 12:58 PM
mlindner   [b]@[url=http://www.914world.com/bbs2/index.php?s...   Mar 21 2025, 01:13 PM
mepstein   Make sure you identify your A-arms before buying t...   Mar 21 2025, 01:18 PM
gnomefabtech   Great replies. I am one to set stuff up pretty so...   Mar 21 2025, 01:34 PM
mepstein   Great replies. I am one to set stuff up pretty s...   Mar 21 2025, 05:04 PM
mskala   Note that the torsion bars on both the 914 and 914...   Mar 21 2025, 02:16 PM
Geezer914   I have 140 lb. springs in the rear and 19mm torsio...   Mar 21 2025, 04:08 PM
Front yard mechanic   I like soft suspension with sway front and rear i...   Mar 21 2025, 04:29 PM
worn   I like soft suspension with sway front and rear ...   Mar 24 2025, 07:35 PM
gnomefabtech   What did those 18.9 bars come in? Short wheelbase ...   Mar 21 2025, 05:36 PM
gnomefabtech   Do any of you know roughly what a type 4 weighs fu...   Mar 21 2025, 05:38 PM
JamesM   Do any of you know roughly what a type 4 weighs f...   Mar 23 2025, 03:32 PM
brant   The common answer is 250. With close to 50/50 Any ...   Mar 21 2025, 06:21 PM
gnomefabtech   Does anyone know the motion ratio of the rear susp...   Mar 21 2025, 06:43 PM
slivel   Does anyone know the motion ratio of the rear sus...   Mar 24 2025, 11:26 AM
captain awesome   Are most of the softer 100 lb recommendations with...   Mar 24 2025, 09:37 AM
flxzcat   My new to me 914-4 is 1825lbs weighed last week on...   Mar 24 2025, 02:22 PM
JamesM   My new to me 914-4 is 1825lbs weighed last week o...   Mar 30 2025, 06:38 PM
brant   thats a nice weight... guessing it is streetable w...   Mar 24 2025, 02:31 PM
gnomefabtech   Headed to the shop today to install 125# rear spri...   Mar 25 2025, 09:58 AM
flxzcat   thats a nice weight... guessing it is streetable ...   Mar 25 2025, 10:49 AM
brant   Way to go I got my -6 to about 1810 wet   Mar 25 2025, 12:35 PM
gnomefabtech   I got the rear springs in yesterday. Massive impro...   Mar 26 2025, 08:49 AM
Superhawk996   The car came with nice Bilsteins that I never kn...   Mar 26 2025, 09:01 AM
gnomefabtech   Also, you guys are talking about 1800# cars. What...   Mar 26 2025, 08:54 AM
sb914   You have pics of the engine swap.? I watched a co...   Mar 26 2025, 09:23 AM
gnomefabtech   I didn't take a lot of photos of the build pro...   Mar 26 2025, 10:01 AM
sb914   Holy rpm ! Can’t wait to see the whole car ...   Mar 26 2025, 10:23 AM
gnomefabtech   RE: Talk torsions and springs.   Mar 26 2025, 11:45 AM
yeahmag   I run extremely high spring rates, but have all te...   Mar 26 2025, 04:15 PM
gnomefabtech   I run extremely high spring rates, but have all t...   Mar 26 2025, 05:04 PM
yeahmag   I have the Mad Dog Motorsports longitudinal, inner...   Mar 28 2025, 04:24 PM
technicalninja   I just love the murdered out black car look! ...   Mar 28 2025, 06:04 PM
gnomefabtech   All that black out look was done by the P.O. but i...   Mar 30 2025, 10:43 AM
gnomefabtech   I have the Mad Dog Motorsports longitudinal, inne...   Mar 30 2025, 10:45 AM


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