2 Mods - Strut And Chassis Brace.......

[Rest]

K&N air filters are great and I fully support using them. The problems happen when people over oil the filter, causing issues from the excess oil.

[Boo]

I have the BT Tech Stiffening Plate installed. I also have the Strut Tower Brace but have not installed it yet.

I believe there are several or many who have installed both braces on their standard or Touring Prius, e.g., GadgetDad (Touring), Efusco (standard), NoMoShocks (standard), BobbyB (standard), Cairo94507 (standard).

I have read hundreds of posts on the Stiffening Plate and every post on the Strut Tower Brace.

For the Stiffening Plate, the most frequent comment is that the car is more stable at highway speeds and in cross winds.

For the Strut Tower Brace, the most frequent comment is that the car's turn-in lean (and to a lesser extent, body roll) is reduced.

I do not recall a single post that said that the brace(s) affected the comfort/harshness of the ride.

[donee]

Originally Posted by cairo94507

Well I have the BT strut tower brace, the chassis plate (one of the first BT Prius products I think) and IO also have the TRD suspension and 17 X 7.5 rims. I also did a larger rear suspension bar (kind of like the old pan hard bars) that goes between the rear shocks. Some call it a sway bar, I do not believe it is a sway bar.
My car handles nice and it is not harsh or rough at all. I drive a canyon road four days per week and can roll through it at 65 and stay with almost anything else without much effort. I think it kind of unnerves the BMW, Mercedez and Porsche crowd when they look in their rear view mirror and see my little Prius staying with them. Hee Hee Hee.

Hi Cairo,

A Panhard rod is the rod that goes from a live rear axle to the chasis. Its purpose is to keep the live rear axle from deflecting sideways under cornering loads and driveshaft torque variations. My first car was a Opel Manta, which had a Panhard rod, and a sway bar. These were seperate parts. It could do cloverleafs at speeds that stock Trans-Am / Camaro's would do a loop-de-loop. Later on the Panhard rod was added to the Trans-Am / Camaro suspension, but in the mid to late 70's this was not a stock item on these cars. And people wonder why "Unsafe at any speed" was a million copy selling book. GM is just too cheap for its customer's goods sometimes.

The Prius has the torsion bar-trailing arm suspension, and the torsion bar is secured to the chasis left-right, but can twist and rotate. So, no need for a Panhard rod. You probably installed an add-on sway bar, to improve the anti-roll characteristics. The torsion bar suspension uses the forward horizontal member as a combination sway bar and trailing arm support. So, rather than beefing up an existing sway bar, one has to add one on.

[Boo]

Originally Posted by cairo94507

.... I also did a larger rear suspension bar (kind of like the old pan hard bars) that goes between the rear shocks. Some call it a sway bar, I do not believe it is a sway bar....

Cairo,

What's that rear bar you're talking about or where did you get it?

Is that one of the TOMs' braces?

[BT Tech]

The majority of our customers that purchased our BT Tech strut tower brace and stiffening plate are using the stock wheels/tires.

As there are a lot more "standard" Prius' out there, the majority have installed our parts on this version but we have sold a good number to those that have the "touring" version as well.

Originally Posted by Genoz World

HELLO.............time for some mods..................i read the related threads but they're not too clear about the COMBO of these two mods. also, i'm thinking about the K&N air filter, NOT for performance, but for longevity.

so, here goes my questions:

#1) on a standard #6 prius, has anyone done both the strut and chassis brace? if so, what are the results of these modifications? is it a bone jarring ride.........or docile enough to only feel it through the turns? would you all consider this a very good addition for a stock prius?

#2) the dealer said that the oil on the K&N air filter will contaminate the sensors on a Scion TC.......is this the same precaution on a 2008 prius? forget about the performance - it's NOT what this is about, it's the longevity and my ability to be able to clean and re-oil whenever i want.

ALSO, i do not plan on changing the stock rims and tires anytime soon. would you all consider the braces a waste of time if the tires are stock goodyear integrities?????

thank you all in advance.

[lazysheep]

Originally Posted by Boo

Cairo,

What's that rear bar you're talking about or where did you get it?

Is that one of the TOMs' braces?

ditto. been reading up on suspension mods for a few days but haven't heard of this bar

[bac]

Originally Posted by Boo

For the Strut Tower Brace, the most frequent comment is that the car's turn-in lean (and to a lesser extent, body roll) is reduced.

I do not recall a single post that said that the brace(s) affected the comfort/harshness of the ride.

ThanX for the summary. Very nice!

One question ..... what do you mean when you state that the "turn-in lean" is reduced? In other words, what's the difference between "turn-in lean" and body roll? ThanX!

... Brad

[Genoz World]

NOW, we're getting somewhere. OK. here goes...............

i'll get the chassis plate and the front strut braces. seems to me like it's good to have them both and they will really shine when i need it, but when the car is driven in a docile manner, i wont know that they're there at all,,,,,,,,,,,,,,,,,AM I RIGHT?

CAIRO - i think you were the one in the previous page that does the canyon driving? wow, too cool. did you notice a drop in MPG when you got the 17" rims? what kind of rims and what tires are you running. you seem to have a very nice "sleeper" Prius!! thumbs up! that's the direction i want my prius to head to.

while i'm on the subject of rims,,,,,,,,,,,,,,,,is there ANY POSSIBLE WAY to get a very light rim and tire combination that will NOT decrease the fuel efficiency of the prius????

[Boo]

Originally Posted by bac

ThanX for the summary. Very nice!

One question ..... what do you mean when you state that the "turn-in lean" is reduced? In other words, what's the difference between "turn-in lean" and body roll? ThanX!

... Brad

The way Drees explained it to me they're somewhat similar. But "turn-in lean" can be viewed as the initial part of body roll when making a turn.

BTW Drees started an excellent thread on the subject of improving the Prius' handling:

How to get go cart handling (in theory at least)