REAR SWAYBAR size question Options

[914forme]

Thanks for sharing, that is a great piece of information

[TravisNeff]

Using the online calculators I get different results from what the H&H page states. Anyways I can adjust the numbers on the lever arm length to get to that 70lbs per inch for a stock bar

16mm rear bar 70 lbs/inch
18mm rear bar 112 lbs/inch
20mm rear bar 171 lbs/inch

[Rand]

Is this an originality thing? Most don't run rear sways, not even the AXers. Always learning.

Guess i'm not most people then ...
(IMG:style_emoticons/default/confused24.gif)


As for the OP, i'd like to see some adjustable drop-links for the stock rear bars!
And yes, a 20mm option would be nice too.
(IMG:style_emoticons/default/driving.gif).

I confess that foremost here in decades, I want to learn. I have been told around here that rear swaybars are not used often. I am not here to be right. I am here to learn. So rear sways are back in?

[dr914@autoatlanta.com]

It is certainly understandable that you have never seen one, the sway bar package was only offered on 71 and 72 sixes NOT 70 models. Here is a pic from the factory catalog, showing the two sizes and the part numbers (don't waste your time trying to order both have been discontinued

15 front 16 rear for the four cylinder, 16 front 15 rear for the six cylinder

Never saw any OE rear bar other than a 16.... and never saw an OE bar on a 6
only added
please show an OE bar stamped 15
18 ? 20 ? don't know

[Bobby Smith]

Is this an originality thing? Most don't run rear sways, not even the AXers. Always learning.

Rand, I think a rear bar is a personal preference thing. I've been autocrossing 914's for 35 years. 1,600 lb four bangers and currently a 914/6 conversion with 3.2ltr and I've always successfully run a rear bar in order to get the car balanced and get good turn with excellent corner exit. I'm sure lots of folks have gone without a rear bar but don't dismiss them.

[Mark Henry]

IIRC there's a stock racing class that has a rear spring/lb limit, the sway bar is a free spring rate addition. Some guys run the rear on the street, the disconnect and tie up the bar at the track.
Performance tune you likely would play around with the bars.

My 3.0 /6 has both stock F/R sways and feels OK, but I picked up a tarett front bar that I'm going to experiment with.

[SirAndy]

It is certainly understandable that you have never seen one, the sway bar package was only offered on 71 and 72 sixes NOT 70 models. Here is a pic from the factory catalog, showing the two sizes and the part numbers (don't waste your time trying to order both have been discontinued

George, the picture you posted shows 15mm for the front and 16mm for the rear.

hinten = rear

(IMG:style_emoticons/default/shades.gif)

[Rand]

Is this an originality thing? Most don't run rear sways, not even the AXers. Always learning.

Rand, I think a rear bar is a personal preference thing. I've been autocrossing 914's for 35 years. 1,600 lb four bangers and currently a 914/6 conversion with 3.2ltr and I've always successfully run a rear bar in order to get the car balanced and get good turn with excellent corner exit. I'm sure lots of folks have gone without a rear bar but don't dismiss them.

Thanks Bobby, I appreciate the input.

[Rand]

It's hard sometimes to come out with a solid answer. I know every car is different, so I get the variance. But I swear, there has been so much talk on here about running no rear sway bars, I know I'm not making it up.

[TravisNeff]

You are not making it up. A few people started saying they didn't like the rear bar as it can lift the inside rear wheel in racing or autocross. Enough people parroted that statement it and now its some sort of gospel.

[dr914@autoatlanta.com]

Actually Andy, no. Maybe not written right in the translation but they are both the two rear sway bar part numbers. Here are the choices for the front sway bar:

It is certainly understandable that you have never seen one, the sway bar package was only offered on 71 and 72 sixes NOT 70 models. Here is a pic from the factory catalog, showing the two sizes and the part numbers (don't waste your time trying to order both have been discontinued

George, the picture you posted shows 15mm for the front and 16mm for the rear.

hinten = rear

(IMG:style_emoticons/default/shades.gif)

[SirAndy]

Actually Andy, no. Maybe not written right in the translation but they are both the two rear sway bar part numbers.

This seems odd since 914.333.701.06 explicitly states that it is for the rear while 05 does not.

To me, that implies 05 is the front stabilizer bar for the 914/6 ...
(IMG:style_emoticons/default/idea.gif)

[Rand]

You are not making it up. A few people started saying they didn't like the rear bar as it can lift the inside rear wheel in racing or autocross. Enough people parroted that statement it and now its some sort of gospel.

Thanks Travis. Sometimes the gospel needs questioning.

I (duh) know it it is different between racers and their cars. My point wasn't to argue, it was to learn.

[TravisNeff]

I agree. That is why I am willing to try this out (IMG:style_emoticons/default/smile.gif)

[914_teener]

You are not making it up. A few people started saying they didn't like the rear bar as it can lift the inside rear wheel in racing or autocross. Enough people parroted that statement it and now its some sort of gospel.

Thanks Travis. Sometimes the gospel needs questioning.

I (duh) know it it is different between racers and their cars. My point wasn't to argue, it was to learn.

If you look at the spring rates it makes sense why you might not need it, especially on the street and then especially in the rear.

It lists a 20 mm bar spring rate in the front at what.....1800 lbs?

[914forme]

On the street I never noticed tire lift on my car with the rear swaybar.

On tight turns on concrete in the autocross, I did notice tire lift with tire spinning. Only solution to that would have been reduce rear spring rate. Car was very well balanced, or figure out a way to maintain forward momentum while in the corner. I chose the latter and installed a Factory ZF limited slip, which latter was replace with a Guard Limited slip due to the declaration ramps.

I like a rear swaybar always have always will.

People like JP Stein never liked them, but we ran in two different areas, and on different surfaces, with different car setups.

The 914-6 I only have the front H&H unit right now. I plan on running 150 lbs rear springs, but I have spring sets that go all the way to 300. I am going to see what I get, as the plan was not to get the welder out for that car. (IMG:style_emoticons/default/wacko.gif) The EG conversion car has 22 mm from t bars, 225 rear springs and a huge front swaybar. I will start with no rear bar, both cars are setup with a torque biased limited slip.

I would love to find an H&H for the 914-6 as it would fit the restored theme for that car. Will not know if I need one for either car until they are on the road.

[TravisNeff]

You are not making it up. A few people started saying they didn't like the rear bar as it can lift the inside rear wheel in racing or autocross. Enough people parroted that statement it and now its some sort of gospel.

Thanks Travis. Sometimes the gospel needs questioning.

I (duh) know it it is different between racers and their cars. My point wasn't to argue, it was to learn.

If you look at the spring rates it makes sense why you might not need it, especially on the street and then especially in the rear.

It lists a 20 mm bar spring rate in the front at what.....1800 lbs?

That is for a front bar (which is 36 inches long vs 42 inches for the rear). Also the front has shorter lever arms which increase the rate over the rear configuration. Check my post a few up and I have some figures for the rear 171lbs.

I was running 22mm torsion bars, 22mm sway bar and 250lb rear springs. I am going down to a smaller torsion bar up front, larger front sway bar and want to run a rear bar then switch to 150-175lb rear springs. I am after the same or a bit more roll stiffness and softer springs.

[914Timo]

That would have been H & H, and they made some nice stuff

And Andy I remember seeing someone made an adjustable rear drop link. It only had one threaded end so you had to pop them, adjust, re-install. But once done how often do you adjust them afterwards?

Thats my setup. Pics are from 2004. Still have it.

[gandalf_025]

Think this was in late 1973

[bdstone914]

15 front 16 rear for the four cylinder, 16 front 15 rear for the six cylinder

@dr914 @autoatlanta.com

I have never seen a 16mm front or a 15mm rear on any 914 or 914-6.

No references in PET to those sizes. What is you source for that information George ?