Body on white is 30 pounds lighter. They probably lost 30 pounds in the battery. I’m going to guess pound-for-pound an S4 only ends up being 120 pounds lighter, so about 3800 with fluids. FWIW I’ve got my B8 down to 3590.
http://www.autoblog.com/2015/06/28/2016-audi-a4-official-photos-video/
Mine is 3995lbs with me in it and a 1/8 thank of gas. So I’m 190, so that’s puts me at 3805. No way you are 215 lbs lighter. What scale are you using?
I am. This is my corner balance from December, with a 3/4 tank and me in the car. I’ve dropped another 100 pounds from Recaro seats.
http://i62.tinypic.com/o0wcc3.jpg
Here’s some of the math I used to get there (3810 was my empty tank/trunk weight for a 6MT):
Weight 3810
front brakes -2
Rear brakes -8
cage +81
rear seats -81
battery -40
exhaust -7
flywheel -5
wheels -40
dampers -8
front seats -116
gas - 4 gallons +24
gas - 4 gallons +24
total 3632
driver +135
gas - 4 gallons +24
gas - 4 gallons +24
track total 3815
I forgot you replaced the seats.
Did they do away with the 2nd firewall and go to tubular shock tower braces instead, or am I looking at this diagram wrong?
http://fourtitude.com/wp-content/uploads/2015/06/materials.jpg
6MT unit is said to be 35 lbs lighter than the old one - but “Open gearwheels, hollow shafts and a smaller clutch reduce the transmission’s weight further with the end result that the new unit is 16 kilograms (35.3 lb) lighter than the old one.”
Wonder if the clutch changes will be the same for the S4? The existing clutch isn’t exactly known for it’s torque holding capability.
http://fourtitude.com/news/Audi_News_1/high-tech-all-the-way-the-new-audi-a4-and-a4-avant/
Your lightweight driver mod is strong!
Out-jockeying the B8 S4 Jockey himself I believe!
135? I am trying to think of the last time I weighed 135. Maybe grade 4? I was around 5’9" back then.
Those weight numbers look like mostly guesses. Also, the corner weight thing for whatever reason seems to always produce an optimistic weight number. Go to a truck scale and take a photo of the car.
No, they’re not guesses. I weighed every part I put on the car and every part I took off of the car, and posted most of the pictures on this forum as I went. I only get to weigh the car once a year (at the same shop in Mountain View) and the numbers true up, plus or minus the gasoline. Some things I couldn’t account for like the weight of the APR CPS with fluids in it - I’m not certain if it’s materially different than stock because it’s taller but thinner.
The scale is calibrated for racecars with much tighter requirements than my B8.
It’s a good thing our society isn’t stack ranked on ability to assault each other, or I’d be screwed. I gave up my hoop dreams when I was in 4th grade and started working on shit that matters.
you have a jHM lightweight flywheel right? The B6 and B7 versions shaved 13 lbs. I’d be shocked if the B8 one only shaves 5. Your back seats weigh exactly the same as your roll cage? Back seats are pretty light. Most folks have said the seatback weighs around 20 lbs. Again, that means the seat needs to weigh 61 lbs?
You saved 100 lbs from Recaro fronts? Is there only one?
The OE flywheel was about 23 pounds and the replacement was about 18, IIRC. It’s not an extreme difference and it’s not a place where you want to cut it to the bone because it makes the car hard to drive (easy to stall). It’s just taking it from a dual mass to a single mass.
In the Aftermarket Seats thread I have the entire back seat on a scale. It’s 67 pounds for the backs and 14 for the bottom foam/wire.
Rollcage tubing weighs 2 pounds per foot and my car needs 40 feet of tubing length, plus a couple of mounting boxes fabricated to the floor.
Front seats weigh 68 pounds each. The new ones are about 22. I’ve only got the driver’s side finished.