So if I were to say the best PnP N5x FMICs currently available are:
Stepped: Wagner evo 3
Non-stepped: VRSF 7 HD
(Assuming track use, hybrids, 400-500hp, cost no object)
Would anyone disagree?
Yes, horses for courses.
Are you doing hybrids WTAC style, 1 lap dash for about 60-100seconds?
20minute sessions?
6 / 12 hr endurance races?
All would be different.
All would prefer light as possible upfront.
All would be drastically different from a drag racing config (ie, one that blocks or restricts flow to the radiator and overall cooling system).
@RSL It'd be better to compare the same core, endtank design to evaluate larger inlet piping. So yes, I would in addition to the ambient temp (6F is a non-issue imo), it is unfair for the aforementioned reason. For OEM tiny turbos pushing 42lb/min, it shouldn't be necessary. Cleaning up the merge of twins, and how twin turbos impact this - I don't know. Maybe that's where gains are seen. I will probably ask a local shop that fiddles regularly with RB26 twin setups for their observations. Solely based on the inducer/exducer spec of our turbo, the compressor outlet ID" - it makes zero sense.
I drive with nothing but the most highly rated Michelins. Either AS 3 Plus or Super sports. And I never let them go bald. Yeah, many people buy bbk for the wrong reasons. My reason is 490-500 whp is too much for the way I drive to stop safely. At 300 crank stock...they work fine.
If you change brakes, never do it in pieces, always get recommended sets so that brake bias is not all over the map. KNOW your new brake bias on the new kit and make proper driving adjustments. Every modification requires changes on your part. You cannot expect to be as safe as before if you modify your car each time and you don't modify your driving technique. So if get upgraded brakes, you better know what you are doing and how they will be different from stock.
I would say you are under-tired for your power. For cold braking on street, your OEM brakes way out power the PSS/AS3P tires, and you won't see any decrease in stopping distance by upgrading to BBK. Your brake might bite more if you select pads with higher cold friction coefficient, and your brake pedal may feel nicer with fixed pistons, but your braking distance wont decrease in emergency cold stopping scenarios. You are 100% tire limited in terms of emergency braking in the scenario you described.
I was shocked when I realized this after upgrading myself. Brakes feel awesome, and inspires confidence, but the data clearly shows that maximum deceleration is decided by the tires.
Do know that tires with plenty of thread may have less grip due to age. You cannot expect tires produced in 2016 to have anywhere near the same grip as tires produced in 2018. You can check the production date on the sidewall of the tire, I believe Michelin uses the format WWYY.
Sounds like you might need to change your driving style if you're having this many close calls on the street. You might be the one giving BMW owners a bad rep.
Same tire brand, same car, since 2013 - three different rotors of varying levels of price, three different pad brands and types... all have different characteristics, all performed differently, NOT because of the tire, but because of the type of rotor and pads. NOT because of steel lines or rubber lines. I don't know how you are doing things but there is absolutely a big difference in braking distance when you upgrade to BBK. I have seen this on many cars that have upgraded and ran the same exact tires. Distances were immediately shortened. You are arguing something that has already been witnessed by me personally multiple times, not just theory. If you like your stock pads and calipers, good for you. I am upgrading so I don't slam into anyone under sudden braking emergencies.
Consider that stock components are the bare minimum the makers install that yield acceptable safety and costs. They simply cannot install BBK levels of performance and make a profit at that price point. And if they do, such as in the M series... the price skyrockets. So let's not kid ourselves. And having driven M cars vs. my 335i...yeah, not even a debate, BBK do outperform the stock 335i brakes by a long shot. Same tires.
Here's my OEM performance, sunny day | Here's my BBK performance, cloudy day |
If you make it sound like you're driving like a dick then you can't blame people for assuming you're driving like a dick. I'll leave it at that and we can get back to intercoolers..
M cars typically have better tires. Also drilled rotors look great, but are arguably not the best choice for serious driving... but lets not argue about this as well.
I would still claim, if the cold ABS-activated braking distance was shortened, it was because you had better grip. If you have problems with brakes overheating, you need different pads + fluid.
Here's data to support my claim. Below you will find a comparison between my 100% stock brakes and my current BBK kit. Same tires (AD08R), just 3 months older on the BBK run.
Here's my OEM performance, sunny day
View attachment 26462Here's my BBK performance, cloudy day
View attachment 26463
I have driven many BMWs -- some stock, some highly modified -- on street and track. With proper pads and fluid, I've never had a problem on the street. In fact, if you can trigger ABS -- as you might in a panic stop -- you know that that the limit on the stopping distance is the tires, not the brakes.
I've gone to BBK on my track car primarily because of increased feel/brake modulatibility and because of increased resistance to fade during long sessions on track involving repeated threshold braking from very high speeds (150 mph+).
Neil
I would say you are under-tired for your power. For cold braking on street, your OEM brakes way out power the PSS/AS3P tires, and you won't see any decrease in stopping distance by upgrading to BBK. Your brake might bite more if you select pads with higher cold friction coefficient, and your brake pedal may feel nicer with fixed pistons, but your braking distance wont decrease in emergency cold stopping scenarios. You are 100% tire limited in terms of emergency braking in the scenario you described.
I was shocked when I realized this after upgrading myself. Brakes feel awesome, and inspires confidence, but the data clearly shows that maximum deceleration is decided by the tires.
Do know that tires with plenty of thread may have less grip due to age. You cannot expect tires produced in 2016 to have anywhere near the same grip as tires produced in 2018. You can check the production date on the sidewall of the tire, I believe Michelin uses the format WWYY.
M cars typically have better tires. Also drilled rotors look great, but are arguably not the best choice for serious driving... but lets not argue about this as well.
I would still claim, if the cold ABS-activated braking distance was shortened, it was because you had better grip. If you have problems with brakes overheating, you need different pads + fluid.
Here's data to support my claim. Below you will find a comparison between my 100% stock brakes and my current BBK kit. Same tires (AD08R), just 3 months older on the BBK run.
Here's my OEM performance, sunny day
View attachment 26462Here's my BBK performance, cloudy day
View attachment 26463
I would say you are under-tired for your power. For cold braking on street, your OEM brakes way out power the PSS/AS3P tires, and you won't see any decrease in stopping distance by upgrading to BBK. Your brake might bite more if you select pads with higher cold friction coefficient, and your brake pedal may feel nicer with fixed pistons, but your braking distance wont decrease in emergency cold stopping scenarios. You are 100% tire limited in terms of emergency braking in the scenario you described.
I was shocked when I realized this after upgrading myself. Brakes feel awesome, and inspires confidence, but the data clearly shows that maximum deceleration is decided by the tires.
Do know that tires with plenty of thread may have less grip due to age. You cannot expect tires produced in 2016 to have anywhere near the same grip as tires produced in 2018. You can check the production date on the sidewall of the tire, I believe Michelin uses the format WWYY.
All i know is, I slammed on the brakes the other day to avoid collision and the car kept going... no skids, no ABS...simply kept going. Plenty of pad left, new fluid. Pedal was slammed to the floor as hard as I could. On BBK cars I have driven, you slam the brakes, you get whiplash...
Yes, tires are very important. However, I measured 20 ft. of difference between a stock setup vs. brembo upgrade on the same car at 45 mph. You can send all the data pics you want, but that ain't gonna change this experience. Same car, same tires.