To cut or not to cut (bump stops)

MX-5 is: 2.0 NC Sport (2006)

I’m fitting Eibach 30mm Pro Sport lowing springs this weekend to my MX5.

I’ve read some cut approx 25mm off the bump stops some don’t.

What should I do ? (currently leaning towards leaving them “as is” )

Thanks Das.

Can i ask why you want to change the springs?
(Just curious to know why thats all)

I understand it will lower the center of gravity and firm up the suspension slightly.
I find the standard suspension far to soft / rolls to much for me.

(this is really an experiment, if I don’t get the desired results then I’ll upgrade to aftermarket adjustable coilovers)

Perhaps leave them as is, if experimenting with it all? Shaving off 25mm isn’t a lot and if removed a smaller bump stop offers less longevity in terms of wear, potentially?

Leave the bump stops alone, there’s no good reason to alter them.

I don’t think that you can go far wrong fitting the Eibach Pro Sport lowering springs, especially on the Sport model which has the Bilstein dampers. I wouldn’t shorten the bumps stops though they are there for a purpose and you could end up with the tryres hitting the arches on big compressions with any steering lock on.

Personally my suggestion would be go see a suspension specialist mate. You will spend far less money in the end to achieve what you want.

And no leave the suspension rubbers end stops alone. How are you going to change the springs? Do you have a spring compressor/clamp thingy?

There are many threads discussing lowering springs, probably the most recent here

I had my 2006 NC Sport lowered by 30mm with the Eibachs in 2000 by Wheels In Motion and wouldn’t go back to the longer springs. In my opinion the wheels look better in the wheel arches and the handling improved. I get no trouble with clearance on speed bumps. I’ve also fitted firmer door bushings (again, lots of discussion on the boards) which I feel firm up the car.

Regarding bump stops; I’ve left mine as is and only very occasionally feel the springs bottom out on them at speed on rougher roads.

Edit: Just looking at your original post, you mention Eibach Pro-Sport coils which are progressive. I don’t know if the ones WIM fitted are linear or progressive - I’ll have to check now.
Definitely worth getting a proper 4 wheel alignment done afterwards though, whatever you do.

Unless you’re buying/fitting new bump stops, on an '06 car, the originals will be totally and completely useless and made of dust, effectively.

Hi ckleanth, it’s a very standard mod, done by many in the past.
I have spring a spring compressor, and all the tools needed for the job.
If I buy aftermarket coilovers then I’ll probably have them setup professionally.

I’ve seem WIM’s recommended alignment settings, I think I can get it close using the kit I’ve got access to.
Thanks Das