F31/Infiniti M30 suspension questions - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

DSMelitistPrick · 01-13-2016, 01:41 AM

I figured Zilvia would be a good place to ask, since these cars are basically made of a bizarre stew of parts from both cars, and F31 club is down, and has been dead for months. I saw a few members here have owned and modded these cars, as well.

My roommate (who is not a car enthusiast at all) has a bone stock M30 as a daily driver. Her struts are blown. Since stock replacements cost eleventy billion dollars because of some sonar device that should have never even been thought of, that's cost prohibitive.

I've heard a lot about S13 suspension being made to work. What I haven't found is a comprehensive list of what parts we need to buy to make it work, or what modifications need to be made. Keep in mind that she just needs a good safe strut replacement. She doesn't care about performance or stance.

Any help would be MUCH appreciated. Thank you.

slidewayz240 · 01-13-2016, 09:16 AM

When i put s13 suspension in my infiniti, i used s13 knuckles and front hubs, s13 tierods, s13 front lower control arms (in this case, s13 ball joints to press into the m30 lcas as s13 arms are longer). you also need s13 front coilovers of some sort as the stock spring is too large to fit in the front strut tower. from what i remember the s13 front strut is also shorter than the m30 strut so you really need to have something that will let you adjust height. For the rear all you need is s13 rear struts, but you have to drill a hole for the strut top, and oval out one of the m30 strut top holes. (m30 is a 3 bolt strut top, s13 is 2 hole)

when i did the s13 swap on my m30 i used s13 struts with eibach springs and ground control coilover sleeves. it rode surprisingly well and was a nice ride height but definitely much lower than stock. the front coils were adjusted all the way up, and the rears all the way down to get it to sit level.

hope this helps some.

slow_sr20 · 01-13-2016, 04:24 PM

Everything he said. www.f31club.com is the m30 forum. I ran a mixed bag of s13 & s14 front end parts with eBay china coils. Rode well.....anything will be better than the blown stock stuff at this point.

mooknmi · 01-13-2016, 07:29 PM

the front coils were adjusted all the way up, and the rears all the way down to get it to sit level.

01-13-2016, 01:41 AM	#1
DSMelitistPrick Join Date: Dec 2005 Location: Oakland, CA Posts: 45 Trader Rating: (0) Feedback Score: 0 reviews	F31/Infiniti M30 suspension questions I figured Zilvia would be a good place to ask, since these cars are basically made of a bizarre stew of parts from both cars, and F31 club is down, and has been dead for months. I saw a few members here have owned and modded these cars, as well. My roommate (who is not a car enthusiast at all) has a bone stock M30 as a daily driver. Her struts are blown. Since stock replacements cost eleventy billion dollars because of some sonar device that should have never even been thought of, that's cost prohibitive. I've heard a lot about S13 suspension being made to work. What I haven't found is a comprehensive list of what parts we need to buy to make it work, or what modifications need to be made. Keep in mind that she just needs a good safe strut replacement. She doesn't care about performance or stance. Any help would be MUCH appreciated. Thank you.

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01-13-2016, 09:16 AM	#2
slidewayz240 Zilvia Member Join Date: Jan 2011 Location: Wilmington, NC Age: 37 Posts: 299 Trader Rating: (3) Feedback Score: 3 reviews	When i put s13 suspension in my infiniti, i used s13 knuckles and front hubs, s13 tierods, s13 front lower control arms (in this case, s13 ball joints to press into the m30 lcas as s13 arms are longer). you also need s13 front coilovers of some sort as the stock spring is too large to fit in the front strut tower. from what i remember the s13 front strut is also shorter than the m30 strut so you really need to have something that will let you adjust height. For the rear all you need is s13 rear struts, but you have to drill a hole for the strut top, and oval out one of the m30 strut top holes. (m30 is a 3 bolt strut top, s13 is 2 hole) when i did the s13 swap on my m30 i used s13 struts with eibach springs and ground control coilover sleeves. it rode surprisingly well and was a nice ride height but definitely much lower than stock. the front coils were adjusted all the way up, and the rears all the way down to get it to sit level. hope this helps some.

01-13-2016, 04:24 PM	#3
slow_sr20 Zilvia Addict Join Date: Aug 2005 Location: dayton, oh Posts: 723 Trader Rating: (13) Feedback Score: 13 reviews	Everything he said. www.f31club.com is the m30 forum. I ran a mixed bag of s13 & s14 front end parts with eBay china coils. Rode well.....anything will be better than the blown stock stuff at this point.

01-13-2016, 07:29 PM	#4
mooknmi BANNED Join Date: Jan 2016 Location: CA Age: 39 Posts: 1 Trader Rating: (0) Feedback Score: 0 reviews	the front coils were adjusted all the way up, and the rears all the way down to get it to sit level.