How much adjustment on Ground Control coil sleeves

[DreamZproject]

Hey guys,

I've found myself some some nice 15" rims for the upcoming Retrospeed race weekend and I've realised that my old set of rims and tyres were grossly oversized so the ride height was set at what I presume is nearly stock levels. 
My car came with Ground Control coil sleeves, so I am able to adjust down, but I am just wondering what is safe with the following coils;

Eibach 10" long spring 200 lbs/in front, 175 lbs/in rear. 

I am unaware of what the inserts are. 

I appreciate your time and expertise. I am unsure when it comes to this kind of set up vs. normal coil overs.

[DreamZproject]

[C.A.R.]

You need at LEAST 100mm of bump travel at ride height Robbie.

 

[DreamZproject]

So 100mm before it hits the bumpstop at ride height? 

 

Cool should be able to tweak it a few times before finding that sweetspot.

 

Cheers!

[DreamZproject]

So this is the clearance I found on the front...

No idea how they've chosen to set this suspension up, but it looks as though it's riding right on the bumpstops but still sits high up in the air... 

Where do I need to take the height off? Top hats or below the strut?

[C.A.R.]

That's a bump stop Robbie..

Regardless there isn't enough bump travel there. To fix that isn't a small job - gimme a call and I'll discus options with you.