What length bolt to lower rear?

Reply Subscribe

Thread Tools

Search this Thread

Oct 19, 2011 | 09:39 PM

skeeters65

Thread Starter

Burning Brakes

Joined: Sep 2011

Posts: 1,196

Likes: 1

From: Norwich CT

What length bolt to lower rear?

What length bolt are you guys using to lower the rear of your C5Z?

Thanks

Oct 19, 2011 | 10:40 PM

lionelhutz

Race Director

Joined: Apr 2007

Posts: 11,150

Likes: 890

From: South Western Ontario

Lowered on stock bolts will drop the suspension travel down to be around 1". So, when you go with the typical 2" longer bolt with 1" of thread you have no suspension travel left.

Peter

Oct 20, 2011 | 07:34 PM

TriplBlk

Safety Car

Joined: Jun 2009

Posts: 3,888

Likes: 2

From: Frederick, Maryland

stock bolt is good, unless you want more thread 6" grade 8

Oct 20, 2011 | 07:42 PM

cptinjak

Burning Brakes

Joined: Jan 2008

Posts: 941

Likes: 3

From: Grand Rapids MI

Mine are 7". Yes, you can and will run out of shock travel if you go too low, but this can be combatted in other ways.

Oct 21, 2011 | 08:23 AM

leadfoot4

Team Owner

Joined: May 2001

Posts: 87,298

Likes: 1,579

From: Western NY

For me, in the rear, stock bolts with a couple of threads showing at the top.

Oct 21, 2011 | 11:56 AM

Pfadt Racing

Safety Car

Joined: Dec 2009

Posts: 3,724

Likes: 9

A modest drop on stock bolts does really improve the looks of these cars... but keep in mind you will eat into suspension travel. The best way to maintain proper suspension travel with an aggressive stance really are with coilovers. A ton of our coilover customers were at one time slammed on lowering bolts and hated the ride, and now wouldn't go back.

Oct 21, 2011 | 12:49 PM

leadfoot4

Team Owner

Joined: May 2001

Posts: 87,298

Likes: 1,579

From: Western NY

Quote:

Originally Posted by Pfadt Racing

Unfortunately, I didn't think of that when I ordered my C-5, and I went ahead and ordered the F45 suspension.........

Oct 21, 2011 | 01:41 PM

Pfadt Racing

Safety Car

Joined: Dec 2009

Posts: 3,724

Likes: 9

It's never too late. There are a couple different ways to eliminate the Magnetic ride shocks and run either conventional shocks or Coilovers. We have had success running our coilovers on both C5 and C6 cars originally equipped with Mag ride switching over to our coilovers.