ISC tophats VS. NB tophats
#1
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I just installed my Bilstien/ebay coilover sleeve/ QA1 spring coilover combo today. The car rides much better than stock, however I'm too high for my liking. F 12.75 R 13.25ish. That's wound all the way down.
The ISC top hats apparently drop you an additional 3/4''. Do the NB tops to the same thing? NB's are significantly cheaper and OEM Mazda, which I like.
I know the springs will settle a little bit, but not enough to bring me to the height I want. I want to be ABLE to go to 12'' if I need, but I'm planning to run F12.25/R12.5.
The ISC top hats apparently drop you an additional 3/4''. Do the NB tops to the same thing? NB's are significantly cheaper and OEM Mazda, which I like.
I know the springs will settle a little bit, but not enough to bring me to the height I want. I want to be ABLE to go to 12'' if I need, but I'm planning to run F12.25/R12.5.
#6
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
Did you see the FCM installation instructions? Unless I'm missing something, it doesn't look difficult.
http://www.fatcatmotorsports.com/FCM...U_bushings.pdf
http://www.fatcatmotorsports.com/FCM...U_bushings.pdf
#13
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
http://www.amazon.com/Energy-Suspens.../dp/B000CN5GEA
Cut them down to size. You need upper and lower bushing and upper and lower washer from NB. Go to Rosenthal Mazda for them.
I'm having a hard time deciding on polyurethane or MCU.
Cut them down to size. You need upper and lower bushing and upper and lower washer from NB. Go to Rosenthal Mazda for them.
I'm having a hard time deciding on polyurethane or MCU.
#14
Boost Czar
![](/mt2011/images_td/ranks/supporter1.gif)
![](/mt2011/images_td/ranks/admin.png)
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,688
Total Cats: 4,113
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
just go to http://www.finishlineperformance.com. you need the tophats, upper and lower bushings, and upper and lower washers.
With my konis, since the threaded is so short, I could only use the lower bushing.
With my konis, since the threaded is so short, I could only use the lower bushing.
#16
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
just go to http://www.finishlineperformance.com. you need the tophats, upper and lower bushings, and upper and lower washers.
With my konis, since the threaded is so short, I could only use the lower bushing.
With my konis, since the threaded is so short, I could only use the lower bushing.
Then assembly like the FCM kit?
What about a shock isolator for the top? Is it nessicary?
#17
Boost Czar
![](/mt2011/images_td/ranks/supporter1.gif)
![](/mt2011/images_td/ranks/admin.png)
iTrader: (62)
Join Date: May 2005
Location: Chantilly, VA
Posts: 79,688
Total Cats: 4,113
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
not sure with the bilsteins to be honest, but I'd assume so. Since the konis are adjustable if I used that nut I'd have no way to adjust the suspension (not like I do alot) with some custom **** to reach down...
#19
![Default](https://www.miataturbo.net/images/icons/icon1.gif)
I can have a set of 4 NB tophats for $80 CAD. So it is a fair bit cheaper than ISC.
Not sure on bumps yet... I'm just running cut stock ones right now until I either order some ES or FCM bumps.
I've driven the car a fair bit over the last two days and it's settled a bit. Right now I'm at about 12.5 in the front and a hair over 13 in the rear. The NB will bring me down to my ideal 12.75 and 12.5... perhaps a bit lower.
In regards to the shock insulator on the top... it is needed for the NB tops? How will that effect the overall lowering the NB tops give you?
Not sure on bumps yet... I'm just running cut stock ones right now until I either order some ES or FCM bumps.
I've driven the car a fair bit over the last two days and it's settled a bit. Right now I'm at about 12.5 in the front and a hair over 13 in the rear. The NB will bring me down to my ideal 12.75 and 12.5... perhaps a bit lower.
In regards to the shock insulator on the top... it is needed for the NB tops? How will that effect the overall lowering the NB tops give you?