 Rear Springs for my 914-6 GT Build? |
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| Tom1394racing |
 Jan 22 2023, 02:46 PM
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#1
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Member  Group: Members Posts: 410 Joined: 25-August 07 From: CT Member No.: 8,039 Region Association: North East States 
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My 914-6 GT Tribute car will for sporting street use with a twin plug carbureted 3.2SS engine. I am not sure if I should be using 100 or 150 lb springs.
Any suggestions? |
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| Miguel K R |
Feb 20 2023, 04:51 AM
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#2
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Newbie Group: Members Posts: 20 Joined: 12-December 19 From: Portugal (Europe) Member No.: 23,732 Region Association: None |
Hi,
I am building a 914-GT replica and I am confused with the spring rate recommendations for Street use. Without getting into the specifics of my car (weight of a 993 engine and Boxster S trans) I often see people suggesting 140-160Lb/in springs, or 160 or 180 progressives. I guess that is for using with Bilstein shocks without threaded adjustment (I guess those springs have a 4.1 to 4.25" Outer Diameter, and a Free Length of 15"). On the other hand, Patrick Motorsports sells threaded adjusters and for Street they recommend 175-225 Lbs springs (I would consider 225 Lbs due to my heavier engine and trans). They mention that these are 2.50” I.D. x 8.0” Length It does not matter if a Spring is short or long, if it has a small or large diameter, nor its preload. Once he suspension starts going down, for each Inch of stroke the spring applies an extra force in Lbs determined by its spring rate. This means that Patrick Motorsports recommends stiffer springs, or am I missing something ? |
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Posts in this topic
Tom1394racing Rear Springs for my 914-6 GT Build? Jan 22 2023, 02:46 PM
scallyk9 I have a 1974 914 3.2L conversion that is running ... Jan 22 2023, 03:06 PM mlindner Tom, I went with 180lb for my 2.2S. Street and tra... Jan 22 2023, 04:09 PM mb911 I use stock on mine. My car rides perfect Jan 22 2023, 04:57 PM Cairo94507 I have 140 pound springs on my car with Elephant R... Jan 22 2023, 05:37 PM East coaster I had 165 progressive rate springs on my 3.6 car a... Jan 22 2023, 08:32 PM infraredcalvin I think I have a set of 165 progressives…. Let ... Jan 23 2023, 03:00 PM Justinp71 I run 200lb rear springs on my 3.2 conversion car.... Jan 23 2023, 04:03 PM Steve I ran 140’s in the rear with my 3.2 and 914 tran... Jan 24 2023, 08:04 AM slivel During the years of Club Racing, I ran a variety o... Jan 24 2023, 10:59 AM r_towle 140 rears, stock front torsion bars
Add an adjusta... Jan 24 2023, 02:37 PM Chris914n6 I got talked into 180s when I did the swap. Droppe... Jan 24 2023, 03:24 PM r_towle teeth and lower back cost money to fix. Jan 24 2023, 03:26 PM
mb911
teeth and lower back cost money to fix.
:agree: Jan 24 2023, 08:34 PM Cairo94507 Hi Miguel, I think you have a good understanding o... Feb 20 2023, 08:14 AM zoomCat Here’s what the factory thought:
I don’t kn... Feb 20 2023, 09:06 AM Justinp71 Each to their own really depending on usage and lo... Feb 20 2023, 01:26 PM |
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