weighed the FD tonight.
#101
All out Track Freak!
iTrader: (263)
Join Date: Jul 2001
Location: Charlottesville VA 22901
Posts: 10,672
Received 412 Likes
on
250 Posts
~105k miles on chassis
~45k miles on reman engine (installed in 2003, not exactly sure on the mileage, but compression and waterseals are fine)
~25k miles on turbos (i replaced the turbos with turbos that had a documented 16k miles on them)
full non-sequential conversion if everything is removed -5
full emissions removal air pump stuff -15
ACT S/S clutch SS OMP lines add a pound for the clutch and lines
custom downpipe -14
magnaflow hi-flow cat -10
Racing Beat single-tip catback exhaust -10
Apex'i intakes, aftermarket silicon couplers for IC piping about the same
battery very nicely relocated into the hatch area behind the rear divider -10 if it's a sm battery
Dynamat +10
all cooling mods are done:
koyo radiator +4
water temp gauge, boost gauge and pettit ast +2
no coolant leaks
water temps stay right at 180 even when flogging the car at the drag strip or autox (only autox'd it once)
64 - 16 = 48
car weight 2780 - 48 = 2732
Jacob,
This is approx what your FD weighs with a full tank and as I previously mentioned in the 3rd post or so of this thread the scales didn't lie
~45k miles on reman engine (installed in 2003, not exactly sure on the mileage, but compression and waterseals are fine)
~25k miles on turbos (i replaced the turbos with turbos that had a documented 16k miles on them)
full non-sequential conversion if everything is removed -5
full emissions removal air pump stuff -15
ACT S/S clutch SS OMP lines add a pound for the clutch and lines
custom downpipe -14
magnaflow hi-flow cat -10
Racing Beat single-tip catback exhaust -10
Apex'i intakes, aftermarket silicon couplers for IC piping about the same
battery very nicely relocated into the hatch area behind the rear divider -10 if it's a sm battery
Dynamat +10
all cooling mods are done:
koyo radiator +4
water temp gauge, boost gauge and pettit ast +2
no coolant leaks
water temps stay right at 180 even when flogging the car at the drag strip or autox (only autox'd it once)
64 - 16 = 48
car weight 2780 - 48 = 2732
Jacob,
This is approx what your FD weighs with a full tank and as I previously mentioned in the 3rd post or so of this thread the scales didn't lie
#102
Rotary Enthusiast
Join Date: Jun 2002
Location: abingdon, maryland
Posts: 1,447
Likes: 0
Received 0 Likes
on
0 Posts
**** mine reads 3210 on the driver door too. how did they make it heavier? it has the same **** as the other tourings. where do you go to weight the car? i tried to use the bathroom scale and it shattered when i drove up on it kvn
#104
Team Benjos Captain
iTrader: (2)
Join Date: Aug 2005
Location: Greenwood/Hartsville, SC.
Posts: 2,720
Likes: 0
Received 1 Like
on
1 Post
Wrong! The original poster reported a weight of 2660 lbs. not 2619.
When you subtract the weight of the missing gas from a full tank, the jack, and the spare tire from the 2789 curb weight you don't have much left over for exhaust component weight savings.......despite the claims made elsewhere on this thread.
It's all gotta add up people.
When you subtract the weight of the missing gas from a full tank, the jack, and the spare tire from the 2789 curb weight you don't have much left over for exhaust component weight savings.......despite the claims made elsewhere on this thread.
It's all gotta add up people.
Apparently, you don't read so well in any case. I took the average of the weights of the exhaust systems that we had information on. The stock system weighs in at 85.6 lbs. with the AVERAGE aftermarket exhaust weighing in at half that. 45lbs. from the exhaust alone is significant. Using the Greddy Ti exhaust you end up saving about 58-60lbs. of weight savings. You're doubling the weight you'd get if you used other weight savings mods like carbon fiber hoods or trunks. If you don't agree that it's significant, we'll you're just an idiot and we should all stop debating. But the bottom line is that you CAN drop that much weight from changing just your exhaust system.
#105
you smell somethin?
iTrader: (4)
_____________Originally Posted by matty
cause u got fucked. u bot one of the heavy ones. mazda made 2% of the rx-7s produced weigh more in an effort to bring up the average weight of the total vehicle product line._____
**** mine reads 3210 on the driver door too. how did they make it heavier? it has the same **** as the other tourings. where do you go to weight the car? i tried to use the bathroom scale and it shattered when i drove up on it kvn
__________________
does any know why this is and were the weight was added?
cause u got fucked. u bot one of the heavy ones. mazda made 2% of the rx-7s produced weigh more in an effort to bring up the average weight of the total vehicle product line._____
**** mine reads 3210 on the driver door too. how did they make it heavier? it has the same **** as the other tourings. where do you go to weight the car? i tried to use the bathroom scale and it shattered when i drove up on it kvn
__________________
does any know why this is and were the weight was added?
#108
Top's always down
iTrader: (5)
_____________Originally Posted by matty
cause u got fucked. u bot one of the heavy ones. mazda made 2% of the rx-7s produced weigh more in an effort to bring up the average weight of the total vehicle product line._____
**** mine reads 3210 on the driver door too. how did they make it heavier? it has the same **** as the other tourings. where do you go to weight the car? i tried to use the bathroom scale and it shattered when i drove up on it kvn
__________________
does any know why this is and were the weight was added?
cause u got fucked. u bot one of the heavy ones. mazda made 2% of the rx-7s produced weigh more in an effort to bring up the average weight of the total vehicle product line._____
**** mine reads 3210 on the driver door too. how did they make it heavier? it has the same **** as the other tourings. where do you go to weight the car? i tried to use the bathroom scale and it shattered when i drove up on it kvn
__________________
does any know why this is and were the weight was added?
The weight stamped on the plate inside the door says 3210 on ALL FDs. It's the GROSS vehicle weight, which means it's the most that car could ever possibly weight while remaining functional. This is calculated by curb weight + maximum payload.
#111
~17 MPG
iTrader: (2)
This thread, although rediculous, should remind us of a few things:
1. When trying to quantify weight savings, it's best to be as specific as possible, because weight weenies are very picky people.
2. There are LOTS of ways to add or reduce weight in your car. For instance, a worn set of tires often weigh 1-3lbs less per tire than when they were new. Aftermarket speakers usually weigh 1-2 lbs more than the OEM speakers they replace.
3. If you're trying to make a very accurate comparison (for instance, trying to take 10lbs worth of brackets and sound insulation out of the car), it would be best to do both before & after measurements with a full tank of gas. Use a gas can if needed...
Just for kicks, my car (1994 base model) weighed in at 2691 lbs. More info, including corner weights, in this thread: https://www.rx7club.com/race-car-tech-103/had-my-fd-corner-weighed-advise-comments-suggestions-430565/#post6062976
-s-
1. When trying to quantify weight savings, it's best to be as specific as possible, because weight weenies are very picky people.
2. There are LOTS of ways to add or reduce weight in your car. For instance, a worn set of tires often weigh 1-3lbs less per tire than when they were new. Aftermarket speakers usually weigh 1-2 lbs more than the OEM speakers they replace.
3. If you're trying to make a very accurate comparison (for instance, trying to take 10lbs worth of brackets and sound insulation out of the car), it would be best to do both before & after measurements with a full tank of gas. Use a gas can if needed...
Just for kicks, my car (1994 base model) weighed in at 2691 lbs. More info, including corner weights, in this thread: https://www.rx7club.com/race-car-tech-103/had-my-fd-corner-weighed-advise-comments-suggestions-430565/#post6062976
-s-
#113
Senior Member
Join Date: Dec 2001
Location: My way, the highway.
Posts: 326
Likes: 0
Received 0 Likes
on
0 Posts
Which is just another way of saying you can't make it come out your way. Once we know that that gas tank is mostly empty....doesn't matter if it's 1/4 or 1/8...that accounts for the majority of the weight reduction. You're stuck with the poster's 2660 total weight and that leaves very little for the exhaust system weight savings you suppose. Which is why you keep talking but can't plug in numbers to make your case.
Last edited by trickshot; 07-09-07 at 10:06 PM.
#114
Senior Member
Join Date: Dec 2001
Location: My way, the highway.
Posts: 326
Likes: 0
Received 0 Likes
on
0 Posts
The lack of gas in the tank accounts for the overwhelming majority of the weight reduction in the original poster's case. Even if you assume the tank is 1/4 full instead of 1/8 full once you know his total weight of 2660, and you account for the missing jack, etc, you don't have an amount left over that would show a big exhaust system weight savings. It's simple math.
#115
Senior Member
Join Date: Dec 2001
Location: My way, the highway.
Posts: 326
Likes: 0
Received 0 Likes
on
0 Posts
are you all still arguing?
of those arguing, have any of you weighed your modded FD's (preferrably R1 or base models) with mods? i have a custom 3" downpipe, 3" magnaflow hi-flow cat, and RB single catback. it's heavy, maybe slightly lighter than stock.
i had 17 fewer gallons of gasoline, a removed spare tire and jack. i'm not sure why everyone is still arguing about the 2660.
of those arguing, have any of you weighed your modded FD's (preferrably R1 or base models) with mods? i have a custom 3" downpipe, 3" magnaflow hi-flow cat, and RB single catback. it's heavy, maybe slightly lighter than stock.
i had 17 fewer gallons of gasoline, a removed spare tire and jack. i'm not sure why everyone is still arguing about the 2660.
I'm certainly not arguing with you. All your numbers add up for me. I gained some insight from your original post.
I guess the only thing I'd be curious about is for you to put the jack and the spare back in the car, and fill it up to the top with gas. Then weigh the car. I'm going to guess it'll be fairly close to 2789 lbs. ....maybe 2778 ...something like that.
#116
Senior Member
Join Date: Dec 2001
Location: My way, the highway.
Posts: 326
Likes: 0
Received 0 Likes
on
0 Posts
[QUOTE=Fritz Flynn
car weight 2780 - 48 = 2732
Jacob,
This is approx what your FD weighs with a full tank and as I previously mentioned in the 3rd post or so of this thread the scales didn't lie [/QUOTE]
Wait, you're telling him what his car weighs based on what your car weighs?! LOL!!!
Too, too funny. Yeah, that's real science for 'ya. A telepathic scale.
"Fritz Flynn - psychic weigher" Haven't I seen your act on the carnival midway?
"I can guess your weight, or you win a cupie doll." Too, too funny.
car weight 2780 - 48 = 2732
Jacob,
This is approx what your FD weighs with a full tank and as I previously mentioned in the 3rd post or so of this thread the scales didn't lie [/QUOTE]
Wait, you're telling him what his car weighs based on what your car weighs?! LOL!!!
Too, too funny. Yeah, that's real science for 'ya. A telepathic scale.
"Fritz Flynn - psychic weigher" Haven't I seen your act on the carnival midway?
"I can guess your weight, or you win a cupie doll." Too, too funny.
#117
Lives on the Forum
iTrader: (9)
Actually, it DOES matter.
The only thing anyone is "stuck" with are the established weights of the components that we are talking about (exhaust, aftermarket exhaust, spare, etc.). They've been weighed individually by numerous reputable FD owners years before you crawled out from under a rock, and numbers posted. They are inarguable, gas or no gas.
The only thing anyone is "stuck" with are the established weights of the components that we are talking about (exhaust, aftermarket exhaust, spare, etc.). They've been weighed individually by numerous reputable FD owners years before you crawled out from under a rock, and numbers posted. They are inarguable, gas or no gas.
The lack of gas in the tank accounts for the overwhelming majority of the weight reduction in the original poster's case. Even if you assume the tank is 1/4 full instead of 1/8 full once you know his total weight of 2660, and you account for the missing jack, etc, you don't have an amount left over that would show a big exhaust system weight savings. It's simple math.
#118
All out Track Freak!
iTrader: (263)
Join Date: Jul 2001
Location: Charlottesville VA 22901
Posts: 10,672
Received 412 Likes
on
250 Posts
I'm certainly not arguing with you. All your numbers add up for me. I gained some insight from your original post.
I guess the only thing I'd be curious about is for you to put the jack and the spare back in the car, and fill it up to the top with gas. Then weigh the car. I'm going to guess it'll be fairly close to 2789 lbs. ....maybe 2778 ...something like that.
I guess the only thing I'd be curious about is for you to put the jack and the spare back in the car, and fill it up to the top with gas. Then weigh the car. I'm going to guess it'll be fairly close to 2789 lbs. ....maybe 2778 ...something like that.
Once you put the jack or anything else he removed back in the car it would weigh the same.
Thanks for finally helping me figure this out.
It's been a tremendous thrill being envolved in this mind altering experience and I'm so thankful that you've been willing to share your great wisdom concerning weights and measures.
I've clearly gleaned all I can from this thread and once again thanks for your help
Thread
Thread Starter
Forum
Replies
Last Post