Brake upgrade Q4

**Steve Webb** · 18-09-11, 14:04

Are the 166 calipers the same as the Fiat Coupe 20vt ones?

**MaxiBoost** · 18-09-11, 14:39

Originally Posted by Steve Webb

Are the 166 calipers the same as the Fiat Coupe 20vt ones?

nop steve
166 caliper more than 4 holes, but measures are same (166 a little bit big, 310mm to 305mm)

you can check this brake measure from
http://www.galfer.es/asp/catalogo_bu...06&p_cataleg=C

**Xti** · 19-09-11, 19:31

Should the Fiat Coupe brake calipers be easier to mount on a Q4 than the 166 ones? Any advantages? Thanks.

**Evodelta** · 11-10-11, 08:21

I'm guessing the Q4 bar is a bit of a twisted design like the Coupe, is there a thread or some pics I can look at? If it's a pig to make i'm afraid it will be expensive.

You're right about the shipping, when the box reaches these kinds of sizes they take volume into consideration and the rates escalate alarmingly....

**Steve Webb** · 11-10-11, 08:37

Here you go, pics courtesy of Jim

Front

Rear

**Evodelta** · 13-10-11, 06:50

If Pedders make this bar and for a decent price what is the point of going any further?

**Steve Webb** · 14-10-11, 21:34

Originally Posted by Evodelta

If Pedders make this bar and for a decent price what is the point of going any further?

No technical reason to look elsewhere, but it was just for the convenience of getting it from somewhere in the EU, and avoiding all the Tax implications and cost of getting the bars shipped all the way from Oz then forwarded on to various parts of Europe.

**nick** · 14-10-11, 20:46

hi guys
brackets and disks are ready..
waiting for koni sport shock absorbers
lets some photos

**peter holst** · 31-10-11, 19:33

looks great - is it possible to buy a set from you?

Originally Posted by nick

hi guys
brackets and disks are ready..
waiting for koni sport shock absorbers
lets some photos

**Evodelta** · 16-10-11, 11:34

Their prices are very good though, you're wasting your time trying to find any better.

**corriedw** · 26-09-12, 10:08

Quote:
Originally Posted by Steve Webb:
ARB Pictures courtesy of Jim

Who made the aftermarket rear ARB? Is it still available?

I believe that is all you may need. An ARB lifts the inside wheel when there are a down force on the outside wheel. Now the Q4 have a limited slip diff at the rear, or so I am told. (I have not tested the Torsen diff, in the Q4 at the rear, for limited slip. The Torsen, Q2s that the guys are fitting to the GTA/GTVs are not)

If it is a LS diff the handling will be ok when the inside rear wheel lift in a corner. The front diff is not LS so all torque to the front axle will go to waste, when the inside front wheel lifts.

So in my humble opinion I will increase spring rates all round, but fit a stiffer ARB only at the back of the car, increasing the chances of lifting the rear wheel. Stiffer sport shocks will achieve much the same effect, without the down side, because shocks are 3 times stiffer at extending(rebound) than compression.