914/LS vs 914/6 Options

[Cracker]

whats the caster at?

We don't know where caster is set...easy to overlook I know (I stated that in the first post). I'll change the rear toe today - if I can sneak into the garage for a bit.

Rich - Thanks for the "paint/shoe pollish" suggestion - good idea. This car had run with the same suspension setup, tire/wheel sizes, etc and had no problems. Another friend, however, did have a little issue with the new R7's having a more squared off shoulder - a little rubbing ensued (and adjustments made). Could be the case here too.

Tony

[stugray]

In the front, again, the tub will dictate what you can do with the stock setup.
If you don't car about stock, and the racing body won't add points for mods, using a die grinder you can oval out the three upper mounting holes and get more negative camber, but go slowly, once again the car will rub up front at the limit.

I just had my head in my wheel well looking at what mods I need to do to get more camber up front.
It looks like the limiting factor with the stock setup (if you hog out the holes and cut the sides off of the hats where the bushings are) is that the top of the shock will hit the body on the inside.
There is no way the tire will rub at the top on the inside as the shock will hit the body first.

I am considering using the offset ball joints to get a little more camber without hitting.

[brant]

Stu. Check in with me at some point. There are a few mods that will give you a little more

[messix]

find what the caster is set at. i bet its pretty low and more would give you a better on center feel and reduce the "twitchy" feel at speed.

some a/x set ups dont use much caster to reduce steering effort.

[Cracker]

find what the caster is set at. i bet its pretty low and more would give you a better on center feel and reduce the "twitchy" feel at speed.

some a/x set ups dont use much caster to reduce steering effort.

Thanks for the tip. Please define, in your words "low caster and more caster" please? I understand caster as positive and negative. Please advise. Chris Foley was telling me the same thing yesterday. I'll try that too.

Argh! Just found I busted a rear shock! Ain't race cars full of fun...

Tony

[r_towle]

find what the caster is set at. i bet its pretty low and more would give you a better on center feel and reduce the "twitchy" feel at speed.

some a/x set ups dont use much caster to reduce steering effort.

Thanks for the tip. Please define, in your words "low caster and more caster" please? I understand caster as positive and negative. Please advise. Chris Foley was telling me the same thing yesterday. I'll try that too.

Argh! Just found I busted a rear shock! Ain't race cars full of fun...

Tony

That could explain the squirrelly behavior you described.

Stu, front tire rubs at lower rear against inner fender at the bottom.
Lock to lock...with fat tires.

[Cracker]

LOL. It felt better today WITH the blown shock. I did take it out for about 20 minute spirited drive this morning. Later in the day, for the first time, I found a small puddle of oil directly under the shock. I must have some binding on the raised shock mounts. Will fix...will be at track in 8 days!!!

Tony

That could explain the squirrelly behavior you described.

[r_towle]

The wing is too small....that will fix it.

[Cracker]

You do have a thing with my wing... (IMG:style_emoticons/default/shades.gif)

T

The wing is too small....that will fix it.

[Dave_Darling]

Thanks for the tip. Please define, in your words "low caster and more caster" please?

Put as much caster in as you can get. That means shock towers all the way aft; should be 6 degrees of caster or more. I think that's positive caster.

--DD

[Cracker]

Thank you Dave...I know what that is but was curious as to how he was defining what he was suggesting.

Tony

Thanks for the tip. Please define, in your words "low caster and more caster" please?

Put as much caster in as you can get. That means shock towers all the way aft; should be 6 degrees of caster or more. I think that's positive caster.

--DD

[mgp4591]

Think of negative caster as what the grocery cart has on the front- the pivot point is forward of the wheel axle and the cart follows bumps and slopes in the floor but is very easy to steer. Translates into high speed instability on a car. Actually ANY speed instability on a car. Positive caster is what your bicycle has- you can take your hands off the bars and it will travel in a straight line. The pivot point is behind the wheel axle and you have more high speed stability on a car but more effort to the steering wheel at low speeds. BMW and Mercedes (and I'm sure others too) have around 7 degrees positive caster to promote high speed stability on the fast roads.
Clear as mud? (IMG:style_emoticons/default/wacko.gif)

[messix]

a low number would be 0 to +3, higher number would be +3 to what ever the chassis i capable of.

i wouldn't even imagine that any suspension tech would set any car up with neg caster.


keep in mind that the more + caster the more steering effort you will have but more "on center" feel at speed. you can dial back some camber with more caster.

imagine a bicycle or motor cycle when you turn the handle bars....... and what the front tire does.

[messix]

cliff notes or front set up for dummies http://www.vikingspeedshop.com/suspension-...caster-and-toe/

[Cracker]

Thanks fella's. I understood "caster" from the get go but was just asking messix to explain his use of terminology. Clear as mud? (IMG:style_emoticons/default/poke.gif)

Tony

[Dave_Darling]

I don't think you can set a 914 up with negative caster, unless you do some Sawz-All work! So any mention of caster in our cars has to be positive caster.

--DD

[r_towle]

Push the top of the strut back towards the windshield as far as it will go.
Measure both sides, one side will be more than the other
Pull one side back forward to match the extreme of the other side.

Unless you cut sheet metal, or install different ball joints, that will be the limit of your chassis.

Clear as mud?

[Cracker]

Yes'm... ;-)

T

[r_towle]

Cracker, rear this

http://www.cassidy-online.com/porsche914/a...aids/index.html

[Cracker]

Thanks. I remember seeing that years ago...very interesting.

T

Cracker, rear this

http://www.cassidy-online.com/porsche914/a...aids/index.html