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Search took 0.55 seconds. Search: Posts Made By: jamal
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 11-22-2020, 02:12 PM
Replies: 23
Views: 4,282
Posted By jamal
The 4-pots make slightly more brake torque (about...

The 4-pots make slightly more brake torque (about 6%), while the 2-pot rears have slightly less (~9%).

My numbers are
65.3/34.7 %f/r for the stock brakes
66.6/33.4 with just 4-pot fronts...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 06-18-2020, 10:30 AM
Replies: 3
Views: 1,883
Posted By jamal
That guy's piston size numbers are wrong for the...

That guy's piston size numbers are wrong for the stock front caliper as are his effective radius numbers so that whole chart has some issues.

I have what I think is a slightly better one. My...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 06-10-2020, 03:52 PM
Replies: 20
Views: 2,867
Posted By jamal
If you have an adjustable endlink, you can get...

If you have an adjustable endlink, you can get the car on a flat surface unbolt them, and take out any preload.

But before you get into that, has the car been corner balanced? Might want to do...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 06-07-2020, 09:00 PM
Replies: 23
Views: 4,282
Posted By jamal
Pretty sure I've made a few comments about brake...

Pretty sure I've made a few comments about brake bias with the assumption front calipers had the bigger pistons.
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 06-06-2020, 09:51 PM
Replies: 23
Views: 4,282
Posted By jamal
My understanding is that the brz 2-pot has...

My understanding is that the brz 2-pot has smaller front caliper pistons than the regular wrx/impreza part. Which by my spreadsheet moves the bias forward a touch.

Also with EBD I wonder how much...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 05-23-2020, 11:21 PM
Replies: 39
Views: 5,949
Posted By jamal
Are you sure that it's increased mass transfer...

Are you sure that it's increased mass transfer that increases grip? Then how does a larger swaybar work?



The reality is there are more than one possible outcome from applying throttle in a...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 05-23-2020, 04:24 PM
Replies: 39
Views: 5,949
Posted By jamal
Lack of negative front camber is what stands out...

Lack of negative front camber is what stands out to me.

Also knowing your spring rates and swaybar sizes/settings would be helpful.
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 11-21-2019, 01:32 PM
Replies: 12
Views: 3,048
Posted By jamal
So you have one box with 4 total pads, or two...

So you have one box with 4 total pads, or two boxes with 8 pads that are all the same?

And yes the rear pads are smaller and different. Regardless of brembos or not.
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 10-09-2019, 01:12 PM
Replies: 46
Views: 14,070
Posted By jamal
I have a hard time getting the math to work out...

I have a hard time getting the math to work out where a 150lb/in rear spring will work. Like, it's going to compress around 5" just sitting still. How much shock travel is there, how much bump travel...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 10-05-2019, 07:23 PM
Replies: 74
Views: 21,855
Posted By jamal
Because the monoblock is a block of aluminum, the...

Because the monoblock is a block of aluminum, the 2-piece caliper has a bunch of steel going through it.

Steel is about 3x stiffer than aluminum and being made out of a forged monoblock or...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 10-05-2019, 06:54 PM
Replies: 74
Views: 21,855
Posted By jamal
On the other hand, I've heard the bolted 2-piece...

On the other hand, I've heard the bolted 2-piece calipers are stiffer because of all the steel from the bolts vs having the same thing made out of a single piece.


Also, while a 1-piece rotor is...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 09-28-2019, 09:59 PM
Replies: 46
Views: 14,070
Posted By jamal
I'm not sure how much the shocks matter when the...

I'm not sure how much the shocks matter when the suspension is bottomed out and basically not moving anymore.
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 08-10-2019, 03:18 PM
Replies: 3
Views: 3,134
Posted By jamal
Appears to just be another relabeled bc/isc/megan...

Appears to just be another relabeled bc/isc/megan etc. Seems like every 6 months some "new" coilover brand comes out. Who cares. It's all the same.

For 1000-1500 you can actually get something...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 08-06-2019, 11:44 PM
Replies: 19
Views: 8,231
Posted By jamal
You could buy a different kind of caliper and...

You could buy a different kind of caliper and measure them yourself.


also wtf do zenki and kouki mean
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 08-06-2019, 12:34 AM
Replies: 19
Views: 8,231
Posted By jamal
I was under the impression the fronts were 42.8mm...

I was under the impression the fronts were 42.8mm and the rears 40.4.

The non-us 277mm fronts should still have 42.8mm pistons, that's the size in literally every subaru 2-pot caliper. However,...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 07-31-2019, 02:20 PM
Replies: 135
Views: 101,098
Posted By jamal
I think the PP rear brembo caliper has 38mm...

I think the PP rear brembo caliper has 38mm pistons, and would assume those are the same. But I'm not completely sure on that.

The GM 4-pots have 42mm pistons, no staggered bore sizes.

The fsm...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 07-26-2019, 06:00 PM
Replies: 22
Views: 8,087
Posted By jamal
04 sti rear rotors DO NOT FIT. The rotor size and...

04 sti rear rotors DO NOT FIT. The rotor size and bolt pattern and parking brake drum do match but the offset from the hat to the rotor ring is different. They will not line up with the caliper.
...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 07-24-2019, 03:12 PM
Replies: 22
Views: 8,087
Posted By jamal
KNS does appear to be the only place that has...

KNS does appear to be the only place that has those more basis "street series" plain DBA rotors in this specific fitment, and they do appear to be dual drilled. I assume this is the link you wanted...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 07-23-2019, 10:36 PM
Replies: 22
Views: 8,087
Posted By jamal
That year range you gave has 3 different rear...

That year range you gave has 3 different rear rotors btw.

04 sti REAR rotors, which are the only year for 5x100 in the us, do not fit. A rotor for the 08-17 fits if it's dual drilled. Like many...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 06-22-2019, 12:18 PM
Replies: 45
Views: 6,465
Posted By jamal
I can't tell from that picture if your rotors are...

I can't tell from that picture if your rotors are vented or not. You need to look at the edge of the disc.

In the US, none of these cars got solid rear rotors as far as I know. I don't know about...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 06-10-2019, 07:45 PM
Replies: 27
Views: 5,105
Posted By jamal
Are you trying to get them from in Canada or...

Are you trying to get them from in Canada or would you be willing to use a shipping depot at the border? They're showing in stock at the place I buy them (which is accurate and gives me actual...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 05-24-2019, 06:43 PM
Replies: 13
Views: 2,119
Posted By jamal
Bolts stretch when you tighten them. The...

Bolts stretch when you tighten them. The important thing is having enough clamping force before the bolt starts to permanently deform or breaks (although some fasteners are designed to yield...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 05-24-2019, 04:04 PM
Replies: 13
Views: 2,119
Posted By jamal
The friction from the clamping force. That's how...

The friction from the clamping force. That's how any bolted connection actually works. Even with the 16mm bolt in 16mm hole, try loosening them both and wiggling things around- there's a good amount...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 05-22-2019, 11:33 AM
Replies: 5
Views: 3,651
Posted By jamal
As far as I know, none of these cars in the...

As far as I know, none of these cars in the US/north america came with the small brakes.

So, yeah, 47031 rear.

The rear pads are also different part numbers between the two, but I think they...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 05-03-2019, 03:03 PM
Replies: 136
Views: 55,544
Posted By jamal
Plus they are meant for drag racing, not braking...

Plus they are meant for drag racing, not braking performance.
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 05-01-2019, 12:17 AM
Replies: 5
Views: 1,284
Posted By jamal
No, that is not the problem. Firstly, those...

No, that is not the problem.

Firstly, those have a threaded lower mount. Are all those in the same spot plus is the spring preload equal?

Secondly, even with preload and height set equal on...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 04-29-2019, 11:48 AM
Replies: 10
Views: 1,765
Posted By jamal
There's definitely nothing "hit or miss" with...

There's definitely nothing "hit or miss" with eibach's race springs. Some of their lowering springs might be a little too low, but that is a completely different product line.

Generally, any...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 04-27-2019, 04:20 PM
Replies: 17
Views: 5,519
Posted By jamal
That angle between the ball joint and top mount...

That angle between the ball joint and top mount is still 15 degree or so, and it's enough to pull the upright inward just slightly faster with strut compression than the ball joint for the entire...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 04-23-2019, 12:25 AM
Replies: 17
Views: 5,519
Posted By jamal
There is a really old plot of an sti front camber...

There is a really old plot of an sti front camber curve that looks like the one posted above

http://jamalb.net/pictures/camber_bump.gif

And for a long time I took it as accurate. But I think...
Forum: Suspension | Chassis | Brakes -- Sponsored by 949 Racing 04-22-2019, 03:51 PM
Replies: 17
Views: 5,519
Posted By jamal
I mean, technically there would be a change, as...

I mean, technically there would be a change, as you are moving the suspension to a different part of the camber curve, but it's going to be very small.

And how do you know that you are losing...
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