Sway Bars
10-27-2005, 11:57 AM
#1
Race Car
Thread Starter
Sway Bars
I have an 1987 944S which I am assuming has the stock sways on in which are (if i am correct) 23.5mm front and 18mm rear. The car does not have the M030 option. I am looking to upgrade and came across a 25mm front sway. I was told to look for a 25.5mm front and a 19 or 20 mm rear to balance the car nicely. I am wondering if I should go with the 25 mm bar. Any advice/opinions are welcomed.
10-27-2005, 12:10 PM
#2
Rennlist Member
My previous 944S came with a 25.5mm front and an 18mm rear bar. I believe it was an optional package, but the rest of the suspension was the standard boge w/ standard springs. So you may want to check the front bar on your car.
There is no 25.0 mm bar, they are 25.5 mm, so if you found a "25mm" it is the 25.5 bar.
The 20mm non-adjustable bar is the 944S M030 option, and they are very rare, so you would probably be better off searching for the 968 M030 19mm 3-way adj bar.
There is no 25.0 mm bar, they are 25.5 mm, so if you found a "25mm" it is the 25.5 bar.
The 20mm non-adjustable bar is the 944S M030 option, and they are very rare, so you would probably be better off searching for the 968 M030 19mm 3-way adj bar.
10-27-2005, 12:25 PM
#3
Race Director
The stock rear bar on a 944S2 is 16mm. I would be very surprised if the 944S stock rear bar was that big.
The 19mm M030 968 rear sway is the way to go for you, IMHO.
-Z-man.
The 19mm M030 968 rear sway is the way to go for you, IMHO.
-Z-man.
10-27-2005, 12:57 PM
#4
Race Car
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Yeah, i put the 19mm adjustable on the rear of my S2 without changing my stock front bar. I like it a lot so far. The car feels...tight...a little less roll....but somehow more alert in terms. The rear seems to communicate a little more now. (maybe its just my head?)
Paragon has them pretty cheap too.
Paragon has them pretty cheap too.
10-27-2005, 01:55 PM
#5
Three Wheelin'
I have an 1987 944S which I am assuming has the stock sways on in which are (if i am correct) 23.5mm front and 18mm rear.
Keep in mind that Z-man and Blue S2 would have the stiffer 26.8 mm front stabilizer bar, so they would have a slightly different balance with a 19 mm M030 bar than you would. OTOH, the 19 mm bar is 3-way adjustable, so you could tune for the balance you want.
10-27-2005, 02:26 PM
#6
Race Car
Thread Starter
Originally Posted by Waterguy
Stock sway bars for an '87 944S were 20 mm or 21.5 mm solid front bar, no rear bar. HOWEVER, according to the FSM "including part of production with M 404 supplied as standard equipment = tubular front stabilizer 25.4 x 4 mm dia. and solid rear stabilizer 18 mm dia." So your car may indeed already have the 25.5 mm front/18 mm rear bars as standdard equipment, and may or may not carry option code 404. The only sure way to find out is to measure them.
Keep in mind that Z-man and Blue S2 would have the stiffer 26.8 mm front stabilizer bar, so they would have a slightly different balance with a 19 mm M030 bar than you would. OTOH, the 19 mm bar is 3-way adjustable, so you could tune for the balance you want.
Keep in mind that Z-man and Blue S2 would have the stiffer 26.8 mm front stabilizer bar, so they would have a slightly different balance with a 19 mm M030 bar than you would. OTOH, the 19 mm bar is 3-way adjustable, so you could tune for the balance you want.
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10-27-2005, 02:49 PM
#9
Nordschleife Master
A vernier scale (AKA Vernier Caliper) lets one read more precisely from an evenly divided straight or circular measurement scale. It is fitted with a sliding secondary scale that is used to indicate where the measurement lies when it is in-between two of the marks on the main scale.
It was invented in its modern form in 1631 by the French mathematician Pierre Vernier (1580-1637). In some languages, this device is called a nonius, which is the latin name of the Portuguese astronomer and mathematician Pedro Nunes (1492-1578) who invented the principle.
Home Depot has them, not expensive at all. Though you wil probably need to convert inch to MM. That will give you a ballpark idea as to what your swaybar size is. They are usually located in the 'tool coral' section where you would find drill bits...etc.
I have a good one i use for machine shop, if you can wait until next week ill bring it to the last autocross.
http://en.wikipedia.org/wiki/Vernier_caliper
Scroll down a bit till you see Vernier and Dial Caliper.
It was invented in its modern form in 1631 by the French mathematician Pierre Vernier (1580-1637). In some languages, this device is called a nonius, which is the latin name of the Portuguese astronomer and mathematician Pedro Nunes (1492-1578) who invented the principle.
Home Depot has them, not expensive at all. Though you wil probably need to convert inch to MM. That will give you a ballpark idea as to what your swaybar size is. They are usually located in the 'tool coral' section where you would find drill bits...etc.
I have a good one i use for machine shop, if you can wait until next week ill bring it to the last autocross.
http://en.wikipedia.org/wiki/Vernier_caliper
Scroll down a bit till you see Vernier and Dial Caliper.
10-27-2005, 03:00 PM
#11
Rennlist Member
Tighten a crescent wrench down on the bar and remove it and measure the gap, or use a set of open ended wrenches and see which one fits on the bar.
ie, if you have a good assortment of metric wrenches, a 27mm wrench works nicely to to check for a 26.8mm bar. Obviously a 24mm wrench wont fit on a 25.5mm bar, and a 27 will be loose. So you can figure it out that way.
But keep in mind that the paint/coatings on the bars may throw off any measurement method by a little bit.
ie, if you have a good assortment of metric wrenches, a 27mm wrench works nicely to to check for a 26.8mm bar. Obviously a 24mm wrench wont fit on a 25.5mm bar, and a 27 will be loose. So you can figure it out that way.
But keep in mind that the paint/coatings on the bars may throw off any measurement method by a little bit.
10-27-2005, 03:01 PM
#12
Race Car
Thread Starter
Wow Jon, I feel like I am back in school. I will let you know. Thinking of trying to do this before the next autocross so I might be off to Home depot. I will let you know if I need it. Thanks.
Yeildsign - unfortunately I am not in school so I have no access to a college physics lab. I would attempt it if the repurcussions wouldn't be a breaking and engering charge.
Yeildsign - unfortunately I am not in school so I have no access to a college physics lab. I would attempt it if the repurcussions wouldn't be a breaking and engering charge.
10-27-2005, 03:02 PM
#13
Race Car
Thread Starter
Originally Posted by Oddjob
Tighten a crescent wrench down on the bar and remove it and measure the gap, or use a set of open ended wrenches and see which one fits on the bar.
ie, if you have a good assortment of metric wrenches, a 27mm wrench works nicely to to check for a 26.8mm bar. Obviously a 24mm wrench wont fit on a 25.5mm bar, and a 27 will be loose. So you can figure it out that way.
But keep in mind that the paint/coatings on the bars may throw off any measurement method by a little bit.
ie, if you have a good assortment of metric wrenches, a 27mm wrench works nicely to to check for a 26.8mm bar. Obviously a 24mm wrench wont fit on a 25.5mm bar, and a 27 will be loose. So you can figure it out that way.
But keep in mind that the paint/coatings on the bars may throw off any measurement method by a little bit.
10-27-2005, 03:18 PM
#15
Race Car
Thread Starter
Originally Posted by Techno Duck
Yea, that is a pretty good idea!
Dan, i better see you beat Mingst now.
Dan, i better see you beat Mingst now.