Post exact weights of weight reduction you have done!
Jun 21, 2012, 07:55 AM
#1381
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Made this the other day
Sorry for the crappy picture.
Still using the rear section of my apexi noir exhaust because it's nice and quiet for the street, buy I will be making an aluminum tailpipe section with quick pinned hangers to swap out at the track and what not. The mid section in aluminum only weighs about 4 pounds and is surely much less restrictive than the other one I had on there! The steel one weighs about 19 pounds. Willing to bet the rear section will drop another 15-20 pounds if not more. I could probably make more of these if anyone wants one!
Sorry for the crappy picture.
Still using the rear section of my apexi noir exhaust because it's nice and quiet for the street, buy I will be making an aluminum tailpipe section with quick pinned hangers to swap out at the track and what not. The mid section in aluminum only weighs about 4 pounds and is surely much less restrictive than the other one I had on there! The steel one weighs about 19 pounds. Willing to bet the rear section will drop another 15-20 pounds if not more. I could probably make more of these if anyone wants one!
Jun 23, 2012, 02:41 AM
#1385
evodan did you see that Magnus is making chromoly rear subframes?
saves 40lbs
facebook link
http://www.facebook.com/photo.php?fb...5163036&type=1
saves 40lbs
facebook link
http://www.facebook.com/photo.php?fb...5163036&type=1
Jun 23, 2012, 07:52 AM
#1387
evodan did you see that Magnus is making chromoly rear subframes?
saves 40lbs
facebook link
http://www.facebook.com/photo.php?fb...5163036&type=1
saves 40lbs
facebook link
http://www.facebook.com/photo.php?fb...5163036&type=1
Jun 23, 2012, 09:46 AM
#1388
That's a nice looking piece. I posted a question, hope it gets answered there. I asked if that weight savings includes the full factory mustache bar that I assume get's deleted? We looked at doing those at one point and with all the aluminum structure in the back Gary (our chassis) guy didn't think there would be much weight savings, 40 pounds is freaking HUGE though! Hell I may need to buy one.
I saw them in person when he was making them three months ago and saw the finished product Thursday when I was up there, they are nice looking piece.
Dave, I would assume with the way this has a backing plate that bolts directly to the diff and seeing the car he was making this for still had the stock mustache bar in place that the weight savings is vs a completely stock setup. Also this quote off FB, "Total wight 16lbs. Saves over 40 lbs over the stock setup."-Marco
I didn't look closely in person but I'm not seeing a sway bar mounting location, if its not there I would imagine some of the weight loss would be associated to the removal of that as well.
Jun 30, 2012, 05:14 PM
#1391
Subframe: 21.6lbs
Diff Front Support: 7.6lbs
Diff Side Mounts: 9lbs
Rear Sway Bar + mounts: 12.3lbs
Mustache Bar: 15.9lbs
66.4 lbs total
The replacement subframe replaces/eliminates the above items for 16 pounds total, so you are looking at -50 pounds. Definitely a significant amount of weight. However, compared to the Buschur lightweight stuff and pulling the rear sway bar, that piece will save you about 12 pounds.
Looking at it, it looks like it would reduce rear chassis stiffness. It kind of makes the diff a stressed member in the frame. That could cause some case flex in the rear diff under hard cornering which is never good for gear sets. Not really an issue for drag racing though.
I wonder if it stuffs a 3000GT diff in there as they are supposed to be a good deal stronger.
Diff Front Support: 7.6lbs
Diff Side Mounts: 9lbs
Rear Sway Bar + mounts: 12.3lbs
Mustache Bar: 15.9lbs
66.4 lbs total
The replacement subframe replaces/eliminates the above items for 16 pounds total, so you are looking at -50 pounds. Definitely a significant amount of weight. However, compared to the Buschur lightweight stuff and pulling the rear sway bar, that piece will save you about 12 pounds.
Looking at it, it looks like it would reduce rear chassis stiffness. It kind of makes the diff a stressed member in the frame. That could cause some case flex in the rear diff under hard cornering which is never good for gear sets. Not really an issue for drag racing though.
I wonder if it stuffs a 3000GT diff in there as they are supposed to be a good deal stronger.
Jul 9, 2012, 12:19 AM
#1393
Cost and the fact that there is no safety with them. I would never use a CF door unless I had a proper roll cage in the car before hand. CF is not going to be good in a collision and nether are gutted OEM doors, but people that are usually gutting there OEM doors have a cage so It would be okay in that case 
Jul 9, 2012, 09:41 AM
#1395
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Depends on who makes the doors.
I have the front AMS Performance doors (http://www.amsperformance.com/cart/A...ont-Doors.html) and I piled all of the hardware, door trim & moulding, and lexan windows that will be getting mounted to the doors, and I'm estimating mine will be right around 19 lbs when all said and done. That works out to a 70 lbs weight savings (35 lbs per door).
The OEMs were ~54 lbs, so with the bare CF doors weighing ~9 lbs each, that means I'm sticking another 10 lbs of stuff on the doors. In a race application where you don't need windows, I'm sure you could be closer to 12-13 lbs. I chose to add back all the rubber door seals and windows, because there's a pretty good chance I may have to race in the rain.
Dave
I have the front AMS Performance doors (http://www.amsperformance.com/cart/A...ont-Doors.html) and I piled all of the hardware, door trim & moulding, and lexan windows that will be getting mounted to the doors, and I'm estimating mine will be right around 19 lbs when all said and done. That works out to a 70 lbs weight savings (35 lbs per door).
The OEMs were ~54 lbs, so with the bare CF doors weighing ~9 lbs each, that means I'm sticking another 10 lbs of stuff on the doors. In a race application where you don't need windows, I'm sure you could be closer to 12-13 lbs. I chose to add back all the rubber door seals and windows, because there's a pretty good chance I may have to race in the rain.
Dave