Coilover question-

Volk Z

Ok I've installed probably 15 sets of coilovers but here's where I'm at.
Pic provided.... to get it where I wanted for a drop I had to max out the rear.
I have shaved around 80 pounds off the rear but this is still odd to me.

The spring was ableto wiggle about a 1/4inch in the perch before i set pre-load. It's sung in there now but I wanted to seeifanyone had thoughts. I've always had the spring snug when bolting the .back perch in the rear

Attached Images

IMG_20170118_161735.jpg (352.3 KB, 32 views)

__________________
AMUSE * TOMEI * STILLEN * CRAFTSQUARE
RECARO * 3M * TOP SECRET * SLICKCARBON

Jhill

Are you shortening the shock at the same time making sure the car isn't just sitting bottomed out in the bump stop?

phreak9i6

Typically the adjustment you're showing in the picture is actually the pre-load. You want to adjust the shock in it's mount up or down first, otherwise you'll be riding on bump stops.

__________________

Volk Z

I set the pre-load with the strut/shock. I install the spring and tighten the perch up. Then I raise that 3/8 of an inch and then line the bottom of the strut up with the hole which would set preload.

The issue here is with all the weight I reduced it seems I had to go maxxed out low on the spring and when it's in the perch BEFORE pre-load is set it can wiggle about a 1/4 inch. Normally the spring would not be able to move up and down.

So I set extra pre-load on the spring and it's snug but I've never encountered needing to go max lowering like this.

__________________
AMUSE * TOMEI * STILLEN * CRAFTSQUARE
RECARO * 3M * TOP SECRET * SLICKCARBON

Jhill

Well I'm not sure if I am following you but of course the springs will winggle with no preload, that is why you preload the spring. If you are trying to find out what "max" low is for BC then undo the shock from the knuckle, adjust the spring collars all the way up, use a floor jack under the spring and jack up until you compress the spring 7mm (according to BC they want 7mm preload). Now adjust the shock until the bolt hole lines up with the knuckle. Secure the shock and lock the shocks collar, remove jack. Now you will have you 7mm preload at max lowering. That is your lowest ride height.

ChaseZ

I had BC's but not with the Swifts so that is likely the difference. Full low was seriously SLAMMED with the BC springs though so it's hard to imagine Swift 'upgrade' making that much difference. And by slammed I mean like full airbag undriveable low.

BC preload is 10mm if I recall, so like 3/8"

Volk Z

I have M7 Japan coilovers. I got it all squared away today

I've installed BC before. 1/4-1/2 is normal preload or until the spring doesn't move basically.

__________________
AMUSE * TOMEI * STILLEN * CRAFTSQUARE
RECARO * 3M * TOP SECRET * SLICKCARBON

Volk Z

The issue really was reducing close to 100 pounds above my trunk area... it raises the car up like a half inch plus.

__________________
AMUSE * TOMEI * STILLEN * CRAFTSQUARE
RECARO * 3M * TOP SECRET * SLICKCARBON

ChaseZ

Yep it's amazing the difference that makes. I took my small sub box out yesterday and it rose like 1/2". That's not including that I already don't haul around a spare tire, jack, took or much of anything else that isn't necessary for the function of the car. Even all that foam in the back is gone lol

Jhill

Ah that makes more sense. I missed the part about reduced weight, may need to drop a spring rate now.