The JHM LW Rotor’s if you buy all 4 at once is a good bit, but you’re shaving 26lbs total of rational mass. Also, keep in mind that I believe you can buy just the “rings” when you’re ready for replacements and keep the hats you have. If you’re looking to save a little money I’d say just get the front. You shave off 20lbs. with just the two front rotors and they’re the ones that will have a bigger impact compared to the rears.
Good thinking bcsniper. This is why I love this forum, don’t get these kinda thoughts thrown around elsewhere.
In that case we could purchased a used b6s4 brake set for around $300 off of classifieds. you really just need the calipers and hardware, not the rotors. Grab the oem rotors for the rear, and the lightweight fronts, and some pads. Bam you are looking at around $1000 for a LIGHTWEIGHT bbk Although I’m not sure how much heavier the rear s4 ones are than our rears. (s4’s are 13lbs each). I too would like to know the real world effect of losing rotating weight though, I’m not sure if it’s a shave milliseconds off your time thing or a big difference.
While Im not sure if the L/W rotors are even available for the 3.0. The L/W rotors on the S4 make a large difference.
The front 10+lbs each side is NIGHT AND DAY. It is a very noticeable gain in both braking fuel usage and performance acceleration. They really do make the car more nimble.
Sniper is right. You only have to pay the 600$ once. every time after that your just getting the rings and there not more then 150$ with hardware. With the JHM L/W rotors Ive seen a better performance from the brakes.
The L/W mods do make a large difference.
The old saying every 10lbs of weight lost is 1 available hp. Every 10lbs of rotational weight lots is like 10 available hp.
so you’re saying that getting both front and rear l/w rotors would be like gaining 25 hp!?!?!?
edit: Wait… 1 hp for every lb?? that cant be true. I would really like to know the value of rotational weight loss. There must be a formula…
Found this on a google search. Interesting thread on the bimmer forums about rotational weight loss.
http://forums.bimmerforums.com/forum/archive/index.php/t-79243.html
Well guys this might be best off starting a new post for this one.
Rotational mass and dead weight are two different things and the difference isn’t linear for rotational mass.
Simple test you can do by your self to FEEL the difference.
Take a string or rope make it 4ft long. Tie a 10lb weight to it and try to swing it in a circle while you have it swinging in a circle try to accelerate that to a faster pace. Now add a 5lb weight and do the same.
Rims and rotors are a big difference performance wise. From the point of off line acceleration and acceleration from a roll.
What makes this a difficult thing to do the math on is the distance from center mass and the parasitic draw of other components.
L/W flywheels will help but the faster your going and the higher gears your using the effect on the benefits of loss change. Somewhat the same is true with rims and rotors.
In the rotors and rims Due to the fact that the weight is removed so far from the source of power its a much larger difference. Still there is no direct calculation that covers all the permators on how beneficial it is.
In conclusion rotational weight loss makes for about a 2:1 benefit from dead weight loss in some cases it makes for a 4:1 loss AT X speed and Y load with M request for acceleration
I made a new post and copied the knowledge you dropped on us into it 
now more talk about beating 1.8T’s!
I love each RWD, FWD, and AWD each for different reasons. I currently own each and each have different aspects that are better than the other under certain situations/circumstances.
Maybe your “RWD is king” argument holds true in the topic at hand? I live in Montana where during the Fall and Winter months when we have snow/ice, RWD is a FAIL.
Now granted I haven’t ever owned a RWG German car, I have owned several RWD American cars including a few muscle cars. I loved them very much but me personally i’ve always loved driving FWD more. Now that I have my Audi, I love Quattro even more.
The comment I made about beating RWD cars with my MKI GTI was because beating these high HP guys in a little bunny rabbit makes my day especially after they point and laugh at the little GIT because who would race such a little boxy car?
Last laugh is on them! ;D
Bottom line is that personal driving habits and conditions determine whether FWD, RWD, 4WD, or AWD is optimal for a driver in my opinion.
WOW that was a great video…gave me the biggest smile
It is great to hear that the JHM tune adapts to the fuel that you put in, becuase in the land of OZ we have 95 and 98 octane to choose…I run shell 98 (sorry use to run lol)
The goal with my car is not to beat a S4 or a 1.8t (modded) cause they are rare as a clean hooker, but I want to be able to beat home grown muscle. One of my mates has a 185Kw (220hp I think) HSV Maloo (5.0 V8 ute, its an older car) and he constanly tells me how much better his car is than mine and I made the mistake well when this tune is all said and done he will be eating quite alot of humble pie his face will be priceless, especilly when I can lay all that power to the ground in the wet 
Great work again guys keep it up
It really is a great video isn’t it, I can’t wait to see rendition 2,3,4,etc as each part on the car is figured out. Tune(2)+DP’s is where it’s REALLY gonna wake up I believe!
Also, just for reference, (I’m not quite sure where you live overseas) but my understanding is the European RON standard for gas pretty much comes out to be that the European “98” actually equals the U.S. 93, it’s just a slightly different calculation and labeling, but the octane is basically the same (i.e. EU 95 = U.S. 91, etc)
You would think that they would keep it all the same through out the world…guess america likes to be different ;D
I am from Australia - and I am hoping to have the fastest 3.0 in australia for a while and then spread the JHM word, it would be nice to have the fastest B6 A4 but there are only handful of BT 1.8’s floating around and I really do mean only a handful.
That would be pretty darn cool!
I’m kinda hoping to have the fastest n/a 3.0 in Canada myself ;D
ok ok ok.
You guys asked for it. So here it is. The new video.
http://audirevolution.net/videos/75/take-2-1.8t-stage2-vs.-jhm-3.0-stage2
please keep in mind that the 3.0 still isn’t all finished project wise. There are still more parts to be tested that we didn’t have time for and still more advancements to be made in the TCU tune.
This car has OEM hogged pipes the catless aftermarket 2.5 pipes should help even more when there ready.
haha fucking awesome… cant wait till they release this stuff.
Count, do you know if they need any beta testers with a manual trans car and BGN motor?
thats siiick! I really want to throw some rocks on AZ so all the asses can eat their crow they deserve but I will try to be the bigger person and restrain myself, lol
Wow. I can’t wait to get this tune in my car. When’s it gonna come out!?
I say we keep all the 1.8 guys in the dark and then blow them away when its realeased and throw up some actual numbers. This is completely awesome though. I can not wait for this to be bolted up to my machine
The tunes are available now. We just have to send in our ECU’s. After retruning my test ECU I took out both of my ECU"s and sent them out.
Just Email the V8@jhmotorsports.com adress thats what I did.
As for the video that is exactly what it feels like. While its a na car and were not getting 100,000,000 hp there is a much different feel to the car. Its something you will enjoy and be able to feel the difference. The power was very noticable.
Im going to dyno my car stock and jhm modifyed. For me I don’t care about the numbes because the seat of the pants is real and its much more fun to drive. Im more interested in getting it to the track and seeing the difference. The dyno is kinda a waste if you ask me so Im not very motavated to do that.
We should definitely keep az a lil left out of the loop for a little bit. Until we all have ours up and running. God I can’t wait till Tuesday night. I hope all you guys get this greatness soon!
Wow the hogpipes really wake the car up a good bit (in addition to the revised tune). I can’t wait to see it with aftermarket DP’s on there