K-Tuned Roll Center Adjusters - Worth It?

Chaos Pilot said:

A 1 1/2 inch drop is not that much. Some Honda Techs will tell that you dont need anything suspension/steering wise for a 1 1/2 drop except adjustable sway bar links. Dropping the car pre-loads the sway bar. This reduces the sway bars rotational arc and and will most defiantly effect handling.

Honda suggests 0 toe because under acceleration the tires toe in. If you lower the car you will have more pronounced toe in under acceleration. You may want to go a degree or 2 toe out to help the car turn in. Adjusting toe is easy with some string, a ruler and flat surface.

Also, check to make sure your compliance bushing is in good order. Small cracks are fine but long and deep cracks are bad. This bushing when bad allows too much front to back movement of the LCA. Especially while accelerating while turning. Big improvement to handling when re-placed.

Front adjustable camber bolts. Get 2 for each side and you will be able to have the front camber adjusted to account for your drop.

All of these items will be less than the cost of a pair of roll centers and your entire front end will be much better off. I used a suspension geometry program to lay out my suspension and roll center is impacted little by a 1 1/2 inch drop. Toe, camber, and sway bar are more negatively impacted than roll center.

Link to the suspension program below

MacPherson Geometry Calculator

Click to expand...

Chaos Pilot said:

The bolts replace the lower 2 strut bolts, the bolts that hold the strut tube to the steering knuckle. The camber bolts have a cam in them that push the strut in or out.

I am including a link to the magnetic camber reader as well. It attaches to your disk brake so you can adjust your camber to match the road your on or type of driving your doing.

Amazon, ebay, and most parts stores have these. Easy install, easy to use... Enjoy

https://www.carparts.com/details/Honda/Civic/Dorman/Camber_Bolt_Kit/2009/RB545508.html?TID=bngpla&origin=%7Badtype%7D&msclkid=8ef121a850911d00206743db24ae3a39&gclsrc=ds&gclsrc=ds

Robot or human?

Click to expand...

SlowLaneLuke said:

I recently installed Koni STR.T shocks, H&R lowering springs, and K-Tuned adjustable rear camber arms on my '08 Si, and it lowered my car by about 1.25 inches all around. Now it feels a lot more stable when cornering, but I noticed that the car doesn't turn in quite as quickly as it used to, even after getting my car aligned as close to OEM specifications as possible. It's not dangerous; I'm not going to understeer into a tree or anything, but I do notice that the steering isn't as sharp as it was before. I did some research and learned that a pair of K-Tuned Roll Center Adjusters can help the precision of the steering. If anyone else has installed these parts, I'd love to hear your thoughts on whether or not they're worth buying. Thanks!

Product link: KTD-RCA-611-Roll Center Adjusters </br>8th Gen Civic

Click to expand...

Chaos Pilot said:

A 1 1/2 inch drop is not that much. Some Honda Techs will tell that you dont need anything suspension/steering wise for a 1 1/2 drop except adjustable sway bar links. Dropping the car pre-loads the sway bar. This reduces the sway bars rotational arc and and will most def effect handling.

Honda suggests 0 toe because under acceleration the tires toe in. If you lower the car you will have more pronounced toe in under acceleration. You may want to go a degree or 2 toe out to help the car turn in. Adjusting toe is easy with some string, a ruler and flat surface.

Also, check to make sure your compliance bushing is in good order. Small cracks are fine but long and deep cracks are bad. This bushing when bad allows too much front to back movement of the LCA. Especially while accelerating while turning. Big improvement to handling when re-placed.

Front adjustable camber bolts. Get 2 for each side and you will be able to have the front camber adjusted to account for your drop.

All of these items will be less than the cost of a pair of roll centers and your entire front end will be much better off. I used a suspension geometry program to lay out my suspension and roll center is impacted little by a 1 1/2 inch drop. Toe, camber, and sway bar are more negatively impacted than roll center.

Link to the suspension program below

MacPherson Geometry Calculator

Click to expand...