weighed the FD tonight.
06-10-07 | 09:28 PM
#51
All out Track Freak!
iTrader: (263)
Joined: Jul 2001
Posts: 10,672
Likes: 412
From: Charlottesville VA 22901
Plug in any reasonable numbers you want, the weight reductions from his changes to the exhaust system are marginal. You probably eat more than that in Twinkies each day. What we seem to really be talking about here is how much gas in the car. That's where the real weight reduction came from. Running on a 1/4 or 8th of a tank is about the cheapest and easiest mod you can do.
You can loose 50lbs easily bolting up an aftermarket exhaust which may be a bag of twinkies to you but it's a keg of beer to me.
06-11-07 | 12:27 AM
#52
Senior Member
Joined: Dec 2001
Posts: 326
Likes: 0
From: My way, the highway.
06-11-07 | 12:40 AM
#53
Senior Member
Joined: Dec 2001
Posts: 326
Likes: 0
From: My way, the highway.
I happened to watch Motorweek this weekend. They tested the retractable hardtop Miata. It weighs 80 pounds more than the soft top. Even though both cars have the same engine and drivetrain, Motorweek got a faster acceleration time for the hardtop. Hey, what gives?!!!
Well, there's always a variation between individual cars, and the truth is the 80 extra pounds makes only a marginal difference.
( Or maybe the test driver cut down on his intake of Twinkies that day.)
06-11-07 | 04:26 AM
#54
Goodfalla Engine Complete
iTrader: (28)
Joined: May 2005
Posts: 3,238
Likes: 34
From: Kennewick, Washington
I just did a quick search. I don't know if the posts are exactly accurate, but they report the precat weighing 18 pounds and the stock main cat weighing 30 pounds. That sounds at least in the right ballpark to me. (not a 50 lb precat).
So once again, you're not eliminating that weight, you're replacing it with lighter components, and in the case of the main cat, you're not shaving that much off of it.
So once again, you're not eliminating that weight, you're replacing it with lighter components, and in the case of the main cat, you're not shaving that much off of it.
main cat alone is 70lbs.
Last edited by Monkman33; 06-11-07 at 04:32 AM.
06-11-07 | 09:14 AM
#55
Actually not.
50 lbs is a significant portion of 100 lbs., which is a significant amount that will yeild noticeable performance gains. Put your wife or girlfriend in the car and see if you can't tell the difference.
Such is the nature of weight reduction in a car like this. Reductions are found in small chunks of 25-50 lbs that in all, add up. There's not 500 lb. boat anchor mounted in the trunk.
Gene Felber used to have a great weight reduction page on his site, and he was obsessive about weight reduction... the result was a 2615 lb. car with a roll bar and mostly full interior, because he took the time to find the weight here and there.
50 lbs is a significant portion of 100 lbs., which is a significant amount that will yeild noticeable performance gains. Put your wife or girlfriend in the car and see if you can't tell the difference.
Such is the nature of weight reduction in a car like this. Reductions are found in small chunks of 25-50 lbs that in all, add up. There's not 500 lb. boat anchor mounted in the trunk.
Gene Felber used to have a great weight reduction page on his site, and he was obsessive about weight reduction... the result was a 2615 lb. car with a roll bar and mostly full interior, because he took the time to find the weight here and there.
06-11-07 | 09:19 AM
#56
The fact that there's varience in how the figure is calculated between organizations doesn't prove in any way that the number published and in question was calculated with less than a full tank, which is the typical practice. The FD doesn't have an unusually large or small tank, so it's unlikely it was emptied for comparison.
You conveniently left out part of it, didn't you? You know the part about, ...."organizations may define curb weight with fixed levels of fuel and other variables to equalize the value for the comparison of different vehicles" (See below for full quote.)
"Curb (kerb) weight is the total weight of a vehicle with standard equipment, all necessary operating consumables (such as motor oil and coolant), a full tank of fuel and not loaded with either passengers or cargo.[1]
This definition may differ from definitions used by governmental regulatory agencies or other organizations.
Additionally, organizations may define curb weight with fixed levels of fuel and other variables to equalize the value for the comparison of different vehicles."
So the definition isn't as hard and fast as you claim.
Have a nice day.
"Curb (kerb) weight is the total weight of a vehicle with standard equipment, all necessary operating consumables (such as motor oil and coolant), a full tank of fuel and not loaded with either passengers or cargo.[1]
This definition may differ from definitions used by governmental regulatory agencies or other organizations.
Additionally, organizations may define curb weight with fixed levels of fuel and other variables to equalize the value for the comparison of different vehicles."
So the definition isn't as hard and fast as you claim.
Have a nice day.
06-11-07 | 09:22 AM
#57
Do you even own one of these cars?
The original post reports a '93 base model without a spare tire and jack and with aftermarket exhaust parts and 1/8th tank of gas weighing 2660 pounds.
The published curb weight for the '93 base car is 2,789 lbs.
I've guesstimated the following weight savings.
-12 downpipe replacing precat
-8 high flow main cat
-1 jack removed
-18 spare tire removed
-103 (16.5 gal. removed from full tank at 6.25 pounds per gal.)
142=Total weight savings.
2789 curb weight
-142 removed
= 2647 pounds.
And as Chaosseven reminds us, "No fat chicks."
The published curb weight for the '93 base car is 2,789 lbs.
I've guesstimated the following weight savings.
-12 downpipe replacing precat
-8 high flow main cat
-1 jack removed
-18 spare tire removed
-103 (16.5 gal. removed from full tank at 6.25 pounds per gal.)
142=Total weight savings.
2789 curb weight
-142 removed
= 2647 pounds.
And as Chaosseven reminds us, "No fat chicks."
06-11-07 | 02:16 PM
#59
Senior Member
Joined: Dec 2001
Posts: 326
Likes: 0
From: My way, the highway.
So now 50 pounds = 100 pounds?!! LOL!
Let's go back to the starting point, shall we?
The original poster claimed a weight of 2660 lbs for his base model '93.
I, and some others, questioned that reduction based on the modest amount of his mods. So, I crunched some numbers.
2789 lbs = weight of '93 base model.
2660 = weight of poster's car.
129 pound difference.
So, how did he do it? Well, he reported some exhaust mods and said he was running about 1/8th of a tank of gas.
It turns out, the missing approx. 16.5 gallons weighs about 103 lbs. That's where the overwhelming amount of the weight reduction came from. The exhaust mods amount to a marginal weight savings of about 26 lbs.
26 lbs. does not equal 100 lbs.
06-11-07 | 02:31 PM
#61
Senior Member
Joined: Dec 2001
Posts: 326
Likes: 0
From: My way, the highway.
Actually, the exhaust mods amount to less than 26 lbs. The original poster reported he also had removed his jack and spare tire which amount to about 19 lbs. So play with the numbers within any reasonable limits and you can see the exhaust weight savings in this case are indeed marginal.
06-11-07 | 02:42 PM
#63
The components in question have been weighed and compared with aftermarket components, and the information with regard to potential savings has been verified and available to RX7 owners for years. You don't have any idea what you're talking about.
Actually, the exhaust mods amount to less than 26 lbs. The original poster reported he also had removed his jack and spare tire which amount to about 19 lbs. So play with the numbers within any reasonable limits and you can see the exhaust weight savings in this case are indeed marginal.
06-11-07 | 02:45 PM
#64
+1. I don't think I've ever heard of the weight savings from a downpipe and HF Cat or midpipe being called "marginal".
06-11-07 | 02:50 PM
#65
Reread the sentence. That isn't what I said, is it... so I'm not quite sure what you're laughing at.
First you said the weight savings wasn't possible. You were proved wrong.
Then you argued pointlessly about how much gas was responsible for the published curb weight, for no real reason because;
The exhaust system has been proven to offer enough potential for enough weight savings to account for the posted weight even with some varience in fuel level... often upwards of 40-50 lbs, which is NOT a marginal amount in these cars...
Not sure what you still think you're argueing about.
First you said the weight savings wasn't possible. You were proved wrong.
Then you argued pointlessly about how much gas was responsible for the published curb weight, for no real reason because;
The exhaust system has been proven to offer enough potential for enough weight savings to account for the posted weight even with some varience in fuel level... often upwards of 40-50 lbs, which is NOT a marginal amount in these cars...
Not sure what you still think you're argueing about.
06-11-07 | 05:15 PM
#66
06-12-07 | 01:25 AM
#67
sold--no longer in debt
Joined: Dec 2002
Posts: 1,659
Likes: 11
From: Cleveland, Ohio
black fd base model w/ stock twins (lightly modded, 306rwhp) = 2680 with a 1/4 tank (a/c and p/s still intact)
red fd base model single turbo (460rwhp) no a/c no p/s = 2860 with a full tank
red fd base model single turbo (460rwhp) no a/c no p/s = 2860 with a full tank
06-12-07 | 01:39 AM
#68
Senior Member
Joined: Dec 2001
Posts: 326
Likes: 0
From: My way, the highway.
LOL! I'm the only one here who has crunched any numbers. There's a lot of naysaying on your part but you've posted nothing to back it up.
Given the the 2660 claimed weight, the 1/8th tank of gas, and the weight of the jack and spare tire, precious little is left over for these extravagant claims for other weight savings. Post your numbers and make 'em fit within the given parameters. Otherwise you're just blowing hot air.
06-12-07 | 08:59 AM
#70
I don't need to "crunch numbers".
I've owned one of these cars for ten years, and this was all covered, oh, say 7-8 years ago before this forum even existed. These parts have been weighed, and the results published.
I've owned one of these cars for ten years, and this was all covered, oh, say 7-8 years ago before this forum even existed. These parts have been weighed, and the results published.
LOL! I'm the only one here who has crunched any numbers. There's a lot of naysaying on your part but you've posted nothing to back it up.
Given the the 2660 claimed weight, the 1/8th tank of gas, and the weight of the jack and spare tire, precious little is left over for these extravagant claims for other weight savings. Post your numbers and make 'em fit within the given parameters. Otherwise you're just blowing hot air.
Given the the 2660 claimed weight, the 1/8th tank of gas, and the weight of the jack and spare tire, precious little is left over for these extravagant claims for other weight savings. Post your numbers and make 'em fit within the given parameters. Otherwise you're just blowing hot air.
06-12-07 | 10:32 AM
#71
All out Track Freak!
iTrader: (263)
Joined: Jul 2001
Posts: 10,672
Likes: 412
From: Charlottesville VA 22901
LOL! I'm the only one here who has crunched any numbers. There's a lot of naysaying on your part but you've posted nothing to back it up.
Given the the 2660 claimed weight, the 1/8th tank of gas, and the weight of the jack and spare tire, precious little is left over for these extravagant claims for other weight savings. Post your numbers and make 'em fit within the given parameters. Otherwise you're just blowing hot air.
Given the the 2660 claimed weight, the 1/8th tank of gas, and the weight of the jack and spare tire, precious little is left over for these extravagant claims for other weight savings. Post your numbers and make 'em fit within the given parameters. Otherwise you're just blowing hot air.
That's it, you are either just ******* with us or you really are lost in the OZONE.
In the 1st page of this thread I listed weights and you preceeded to argue.
Later you agree but list the exhaust savings at less than 20lbs. Now you're saying it's 26lbs or something. For the love of God man it's atleast 40 and usually more like 50. Seriously my man what is your problem with understanding this very VERY simple equation. Clearly you're are making me nuts and I apologize if I'm being rude but DAMN you need a frikken math tutor.
Stock precat 22
Stock midcat 32
Stock catback 32
Aftermarket dp 8
Aftermarket hf cat 12 or midpipe 8 or less
Aftermarket catback 8 to 20
DO THE MATH!!!
06-12-07 | 03:20 PM
#73
All out Track Freak!
iTrader: (263)
Joined: Jul 2001
Posts: 10,672
Likes: 412
From: Charlottesville VA 22901
Entire car:
PFS 3rd gen race car about 2300 Kevin Wyum 31 Dec 1997
Jim LaBreck car before 20B about 2500 Jim LaBreck 09 Feb 1999
Jim LaBreck est weight reduction before 20B - 175-200lbs Jim LaBreck 20 Nov 1998
Sandy L.'s car without 50lb spare, with 15gal fuel 2520 Sandy L. 17 May 1999
Base model w/leather, cruise, no spare tire, 1/8th tank 2695-2710 Mike 12 Aug 1999
Pettit 3 rotor, 550 hp, 5 lbs/hp 2740 SCC 11/98, p53
Sandy L.'s car no spare, a/c, or ps, 5 gal fuel 2740 Sandy L. 17 May 1999
Hung-Jen Hung's cornerbalanced car w/GC GAB Super R's 2743 Hung-Jen Hung 25 Aug 1998
CAR mag test for '99, probably a Mazda figure 2778 CAR review posted by Wael 20 May 1999
Stock 93 base model, 3/8 tank gas, 10.9 lbs/hp 2780 Max Cooper 23 Aug 1998
93 RX7 2789 Mazda sales brochure
93 Base with 1/4 tank fuel 2800 Sean Adee 28 Mar 1999
R1 2801 Dennis Pedersen 16 Jul 1998
Jeff Witzer's R1, no driver, 1/2 tank, stock wheels? 2835 Jeff Weitzer 21 Nov 1998
93 RX7 2840 Sept 93 C&D posted by Felix 30 May 1998
Touring with manual transmission 2862 Dennis Pedersen 16 Jul 1998
Gordon Monson's car 2870 Gordon Monson 21 Apr 1999
93 Touring with Bose etc. 2870 R&T 4/92, p81
Mazda Australia one-off prototype SPII 2910 Jeff Smith 08 May 1999
Engine:
T2 engine w/accessories 350-375 Max Cooper 09 Feb 1999
13BT 86-88 T2 375 Max Cooper 17 May 2000
13BREW with flywheel, turbos, No AC, air pump or PS 320 Les D. May 2001
Transmission:
Stock 5 speed dry 112 Jim LaBreck 18 Apr 2001
Stock 5 speed without fluids 116 Shannon Ward 16 Jan 2000
Stock 5 speed without bellhousing, with shipping box 90 Christopher (Krzysiu013) 16 Jan 2000
Borg Warner T56 133 Jim LaBreck 15 Jan 2000
Borg Warner T56 dry 122 Jim LaBreck 18 Apr 2001
Tremec TKO or TR-3550 74 Jim LaBreck 15 Jan 2000
Accessories:
Airpump 20 Steve Cirian 08 Aug 1998
Power steering pump and pressure side hose
Power steering and A/C, brackets, pulleys, etc 38.6 RudylRx7@aol.com 20 Sep 1999
Front engine eye hook w/both bolts 0.73 "anonymous"
Rear engine eye hook w/1 bolt 0.18 "anonymous"
Stock air sep tank w/both pressure hoses, top bracket & bolts 0.97 "anonymous"
Stock turbos, center housing, wastegate, pre-ctrl actuators 28.2 Max Cooper 30 Apr 2000
(Not exhaust manifold and DP studs)
Pulleys:
Stock steel pulley w/bolts and little stamped plate 3.4 Gene Felber 31 Dec 2000
Stock belts, each 0.3 "anonymous"
Greddy pulley kit (alloy wp and alt pulleys) 1.4 "anonymous"
Greddy belt for no air pump 0.16 "anonymous"
Pettit main pulley, alloy, w/ allen screws 1.4 "anonymous"
Flywheels:
Stock 23 Dale Black 03 Feb 1999
Stock 22 Thom Chow 03 Feb 1999
Stock 22 Gene Felber 12 Dec 2000
Auto trans counterweight, required for RB aluminum 3-4 Guess by Felix M. 09 Jun 1998
Auto trans counterweight, required for RB aluminum 5 Dale Black 03 Feb 1999
Centerforce 11 Alan Beder 27 Jan 1999
Exedy chrome-moly lightweight 10.8 SCC 7/99 p215
Mazda Competition with rivited on friction surface
MazdaTrix 12 Nelson Starbranch 04 Apr 1999
Mostly Mazda 8lb 8 Nelson Starbranch 04 Apr 1999
Mostly Mazda 11lb 11 Nelson Starbranch 04 Apr 1999
Pettit w/replacable surf 8.5 Jeff Witzer 09 Feb 1999
Pettit 8.5 Nelson Starbranch 04 Apr 1999
Pettit 11.5 Nelson Starbranch 04 Apr 1999
Racing Beat alum w/steel friction surface incl counterweight? 11.5 Nick Riefner 03 Feb 1999
Racing Beat aluminum 12.5 Racing Beat website
Racing Beat aluminum(8.2lb, 4lb cntrwt, .6lb hrdwr & pckging) 12.8 Max Cooper 03 Nov 1999
Racing Beat lightweight steel 17.7 Racing Beat website
Rotary Performance 8.5 Nelson Starbranch 04 Apr 1999
Rotary Performance 9.25 Nelson Starbranch 04 Apr 1999
RX-7 Fashion 8 Nelson Starbranch 04 Apr 1999
Shane Racing 9.5 Nelson Starbranch 04 Apr 1999
TriPoint aluminum 8.5 Richard Thomason 03 Feb 1999
Wholesale Hyperformance chrome moly 11.9 Andreas Darmawan 20 Mar 1999
Driveshaft:
Stock 3rd gen RX7 ?
RE Amemiya carbon fiber for 3rd gen RX7 ?
Advance Carbon Technology, Japan carbon fiber for 3rd gen RX7 ? Brooks 02 Jun 1999
Power Plant Frame:"
Stock 20.3 Bernd Kluesnener 21 Jun 1998
Mazdaspeed 20.3 Bernd Kluesnener 21 Jun 1998
Downpipes:
Stock pre-cat 22.5 ? 08 Aug 1999
Stock pre-cat w/O2 sensor) 22.6 Max Cooper 25 Aug 1999
Stock pre-cat 24
Applied Technologies (ATR) SS ?
Bonez SS 8 Scot Kight 18 Feb 1999
Bonez (RP) SS, without O2 sensor 8 Max Cooper 25 Aug 1998
Bonez MS 11 Scot Kight 18 Feb 1999
Bonez MS, weighed on a digital bathroom scale 13 Wade Lanham 25 Aug 1998
Pettit SS DP with Jet Hot Grey 2000 Coat 7.6 Jeff A. Hackett 20 Apr 2001
Main Cat:
Stock 33.5 Gene Felber 15 Apr 2001
Stock 30 Max Cooper 12 Dec 1999
Stock 12 Steve Cirian's web site
Super Converter -30? Doug Underwood 06-Jun-1999
Mega-Flo -30? Doug Underwood 06-Jun-1999
Bonez high -30? Doug Underwood 06-Jun-1999
N-Tech SS high-flow cat with air-pump pipe, $300 11.6 Max Cooper 26-Oct-1999
N-Tech SS high-flow cat 12 Max Cooper 12 Dec 1999
Random Technology -30? Doug Underwood 06-Jun-1999
Rotary Performance hi-flo cat (stainless) 16 Ed Kim 28 Mar 2000
Rotary Performance hi-flo cat (stainless) 16 Gene Felber 15 Apr 2001
Catbacks:
Stock 33.5 Gene Felber 15 Apr 2001
Stock 33 Gene Felber 01 Dec 2000
Stock 31 Scot Kight 08 Aug 1998
Stock 33.6 Max Cooper 25 Aug 1998
Stock 33 Max Cooper 12 Dec 1999
Stock 34 Steve Cirian's web site
Stock 35 Ken Walanski 07 Apr 1999
Apex N1 29.5 Thom Chow 28 Apr 1999
ASP w/Ultraflow (midpipe + exhaust) 22 Kevin Wyum 05 Apr 1997
ATR 2 piece SS (same as Pettit?) 19 Billy Spence 12 Apr 1998
Borla 23 Steve Cirian's site
Greddy 32 Steve Cirian's site
Greddy PE 28 Max Cooper 25 Jan 1999
Japtrix 20 Steve Cirian's site
Pettit TKT w/5.25" tip 18 Jerry Josz 16 Sept 1998
Pettit TKT w/5.25" tip, 18 lbs lighter than stock 15? Pettit website
PFS 19 Steve Cirian's site
Racing Beat (RS*R) stainless steel <24 Steve Cirian's site
Racing Beat (RS*R) mild steel 24 Steve Cirian's site
Racing Beat w/4" tip, reduction over stock catback -10 SCC 5/99 p184
RS*R painted dual tip w/hardware (0.8 lbs) 30.4 Max Cooper 05 Jul 2000
RS*R stainless single tip- rear muffler only 18.5 Gene Felber 24 Mar 2001
Tanabe 39 RudylRx7 16 Dec 1998
Exhaust heat shields Honda Civic 5 SCC 5/2000 p 202
Radiators:
Stock 8.5 Yamagughi text
Mazda Comp 50% bigger ?
Brake Parts:
AP Racing 330m compared to stock, per wheel -2.6 Bernd Kluesener 05 Jun 1998
Vlaskis kit front, 355x32 Brembo disc, AP caliper, +2 Mark Valskis 21 Jun 2000
per corner wt ch compared to stock
Vlaskis kit rear 313x25.4 Brembo disc, AP caliper, -4.5 Mark Valskis 21 Jun 2000
per corner wt each compared to stock
Brake Rotors:
Stock iron rotors 11.6"x0.85" 15 SCC 4/99, p 200
Stock iron rotors 11.6"x0.85" 14.6 Shiv 02 Oct 1998
AP Racing 330x28 with aluminum mounting bell 11.9 Bernd Kluesener 23 Apr 1998
Brembo, OEM style solid face, front 15.4 Max Cooper 14 Nov 1999
Ikuta, OEM style solid face, rear 11.2 Max Cooper 14 Nov 1999
Cooltech MMC 14x1.25" one-off for Shiv 7.65 SCC 4/99, p 205
M2 AP Racing 13x1.2" 48 vane rotor 12.5 Shiv SCC p184 Nov 1999
Mandeville 13" big brake kit rotors 14-15 Wael 25 Jun 1999
Porsche 911 Turbo 12.7" 21 SCC 4/99, p 202
Porsche 322x32mm bi-turbo GT cross drilled rotors 15.3 Brad Barber/Fritz McKellar 22 Apr 1998
Stoptech 328x28mm (13.12x1.12") iron slotted on al hats 10 Gordon Monsen 15 Aug 1999
Stoptech 328x25 mm MMC with cast-in holes 4 Gordon Monsen 15 Aug 1999
Brake Pads
Hawk HP+ front, set of 4 3.2 Max Cooper 14 Nov 1999
Hawk HPS rear, set of 4 1.6 Max Cooper 14 Nov 1999
Brake Calipers:
Stock Mazda alloy caliper, front 6.20 SCC 4/99, p 205
AP Racing 3720 caliper 6.1 Bernd Kluesener 23 Apr 1998
Brembo Cooltech 4 piston caliper w/bracket 9.45 SCC 4/99, p 205
M2 AP Racing 4 pot calipers lighter than stock Shiv 16 Aug 1999
Mandeville big brake kit modified stock calipers 8-9 Wael 25 Jun 1999
Wilwood caliper 13.1 Brad Barber/Fritz McKellar 22 Apr 1998
Stoptech calipers for above rotors 6 Gordon Monsen 15 Aug 1999
PFS 3rd gen race car about 2300 Kevin Wyum 31 Dec 1997
Jim LaBreck car before 20B about 2500 Jim LaBreck 09 Feb 1999
Jim LaBreck est weight reduction before 20B - 175-200lbs Jim LaBreck 20 Nov 1998
Sandy L.'s car without 50lb spare, with 15gal fuel 2520 Sandy L. 17 May 1999
Base model w/leather, cruise, no spare tire, 1/8th tank 2695-2710 Mike 12 Aug 1999
Pettit 3 rotor, 550 hp, 5 lbs/hp 2740 SCC 11/98, p53
Sandy L.'s car no spare, a/c, or ps, 5 gal fuel 2740 Sandy L. 17 May 1999
Hung-Jen Hung's cornerbalanced car w/GC GAB Super R's 2743 Hung-Jen Hung 25 Aug 1998
CAR mag test for '99, probably a Mazda figure 2778 CAR review posted by Wael 20 May 1999
Stock 93 base model, 3/8 tank gas, 10.9 lbs/hp 2780 Max Cooper 23 Aug 1998
93 RX7 2789 Mazda sales brochure
93 Base with 1/4 tank fuel 2800 Sean Adee 28 Mar 1999
R1 2801 Dennis Pedersen 16 Jul 1998
Jeff Witzer's R1, no driver, 1/2 tank, stock wheels? 2835 Jeff Weitzer 21 Nov 1998
93 RX7 2840 Sept 93 C&D posted by Felix 30 May 1998
Touring with manual transmission 2862 Dennis Pedersen 16 Jul 1998
Gordon Monson's car 2870 Gordon Monson 21 Apr 1999
93 Touring with Bose etc. 2870 R&T 4/92, p81
Mazda Australia one-off prototype SPII 2910 Jeff Smith 08 May 1999
Engine:
T2 engine w/accessories 350-375 Max Cooper 09 Feb 1999
13BT 86-88 T2 375 Max Cooper 17 May 2000
13BREW with flywheel, turbos, No AC, air pump or PS 320 Les D. May 2001
Transmission:
Stock 5 speed dry 112 Jim LaBreck 18 Apr 2001
Stock 5 speed without fluids 116 Shannon Ward 16 Jan 2000
Stock 5 speed without bellhousing, with shipping box 90 Christopher (Krzysiu013) 16 Jan 2000
Borg Warner T56 133 Jim LaBreck 15 Jan 2000
Borg Warner T56 dry 122 Jim LaBreck 18 Apr 2001
Tremec TKO or TR-3550 74 Jim LaBreck 15 Jan 2000
Accessories:
Airpump 20 Steve Cirian 08 Aug 1998
Power steering pump and pressure side hose
Power steering and A/C, brackets, pulleys, etc 38.6 RudylRx7@aol.com 20 Sep 1999
Front engine eye hook w/both bolts 0.73 "anonymous"
Rear engine eye hook w/1 bolt 0.18 "anonymous"
Stock air sep tank w/both pressure hoses, top bracket & bolts 0.97 "anonymous"
Stock turbos, center housing, wastegate, pre-ctrl actuators 28.2 Max Cooper 30 Apr 2000
(Not exhaust manifold and DP studs)
Pulleys:
Stock steel pulley w/bolts and little stamped plate 3.4 Gene Felber 31 Dec 2000
Stock belts, each 0.3 "anonymous"
Greddy pulley kit (alloy wp and alt pulleys) 1.4 "anonymous"
Greddy belt for no air pump 0.16 "anonymous"
Pettit main pulley, alloy, w/ allen screws 1.4 "anonymous"
Flywheels:
Stock 23 Dale Black 03 Feb 1999
Stock 22 Thom Chow 03 Feb 1999
Stock 22 Gene Felber 12 Dec 2000
Auto trans counterweight, required for RB aluminum 3-4 Guess by Felix M. 09 Jun 1998
Auto trans counterweight, required for RB aluminum 5 Dale Black 03 Feb 1999
Centerforce 11 Alan Beder 27 Jan 1999
Exedy chrome-moly lightweight 10.8 SCC 7/99 p215
Mazda Competition with rivited on friction surface
MazdaTrix 12 Nelson Starbranch 04 Apr 1999
Mostly Mazda 8lb 8 Nelson Starbranch 04 Apr 1999
Mostly Mazda 11lb 11 Nelson Starbranch 04 Apr 1999
Pettit w/replacable surf 8.5 Jeff Witzer 09 Feb 1999
Pettit 8.5 Nelson Starbranch 04 Apr 1999
Pettit 11.5 Nelson Starbranch 04 Apr 1999
Racing Beat alum w/steel friction surface incl counterweight? 11.5 Nick Riefner 03 Feb 1999
Racing Beat aluminum 12.5 Racing Beat website
Racing Beat aluminum(8.2lb, 4lb cntrwt, .6lb hrdwr & pckging) 12.8 Max Cooper 03 Nov 1999
Racing Beat lightweight steel 17.7 Racing Beat website
Rotary Performance 8.5 Nelson Starbranch 04 Apr 1999
Rotary Performance 9.25 Nelson Starbranch 04 Apr 1999
RX-7 Fashion 8 Nelson Starbranch 04 Apr 1999
Shane Racing 9.5 Nelson Starbranch 04 Apr 1999
TriPoint aluminum 8.5 Richard Thomason 03 Feb 1999
Wholesale Hyperformance chrome moly 11.9 Andreas Darmawan 20 Mar 1999
Driveshaft:
Stock 3rd gen RX7 ?
RE Amemiya carbon fiber for 3rd gen RX7 ?
Advance Carbon Technology, Japan carbon fiber for 3rd gen RX7 ? Brooks 02 Jun 1999
Power Plant Frame:"
Stock 20.3 Bernd Kluesnener 21 Jun 1998
Mazdaspeed 20.3 Bernd Kluesnener 21 Jun 1998
Downpipes:
Stock pre-cat 22.5 ? 08 Aug 1999
Stock pre-cat w/O2 sensor) 22.6 Max Cooper 25 Aug 1999
Stock pre-cat 24
Applied Technologies (ATR) SS ?
Bonez SS 8 Scot Kight 18 Feb 1999
Bonez (RP) SS, without O2 sensor 8 Max Cooper 25 Aug 1998
Bonez MS 11 Scot Kight 18 Feb 1999
Bonez MS, weighed on a digital bathroom scale 13 Wade Lanham 25 Aug 1998
Pettit SS DP with Jet Hot Grey 2000 Coat 7.6 Jeff A. Hackett 20 Apr 2001
Main Cat:
Stock 33.5 Gene Felber 15 Apr 2001
Stock 30 Max Cooper 12 Dec 1999
Stock 12 Steve Cirian's web site
Super Converter -30? Doug Underwood 06-Jun-1999
Mega-Flo -30? Doug Underwood 06-Jun-1999
Bonez high -30? Doug Underwood 06-Jun-1999
N-Tech SS high-flow cat with air-pump pipe, $300 11.6 Max Cooper 26-Oct-1999
N-Tech SS high-flow cat 12 Max Cooper 12 Dec 1999
Random Technology -30? Doug Underwood 06-Jun-1999
Rotary Performance hi-flo cat (stainless) 16 Ed Kim 28 Mar 2000
Rotary Performance hi-flo cat (stainless) 16 Gene Felber 15 Apr 2001
Catbacks:
Stock 33.5 Gene Felber 15 Apr 2001
Stock 33 Gene Felber 01 Dec 2000
Stock 31 Scot Kight 08 Aug 1998
Stock 33.6 Max Cooper 25 Aug 1998
Stock 33 Max Cooper 12 Dec 1999
Stock 34 Steve Cirian's web site
Stock 35 Ken Walanski 07 Apr 1999
Apex N1 29.5 Thom Chow 28 Apr 1999
ASP w/Ultraflow (midpipe + exhaust) 22 Kevin Wyum 05 Apr 1997
ATR 2 piece SS (same as Pettit?) 19 Billy Spence 12 Apr 1998
Borla 23 Steve Cirian's site
Greddy 32 Steve Cirian's site
Greddy PE 28 Max Cooper 25 Jan 1999
Japtrix 20 Steve Cirian's site
Pettit TKT w/5.25" tip 18 Jerry Josz 16 Sept 1998
Pettit TKT w/5.25" tip, 18 lbs lighter than stock 15? Pettit website
PFS 19 Steve Cirian's site
Racing Beat (RS*R) stainless steel <24 Steve Cirian's site
Racing Beat (RS*R) mild steel 24 Steve Cirian's site
Racing Beat w/4" tip, reduction over stock catback -10 SCC 5/99 p184
RS*R painted dual tip w/hardware (0.8 lbs) 30.4 Max Cooper 05 Jul 2000
RS*R stainless single tip- rear muffler only 18.5 Gene Felber 24 Mar 2001
Tanabe 39 RudylRx7 16 Dec 1998
Exhaust heat shields Honda Civic 5 SCC 5/2000 p 202
Radiators:
Stock 8.5 Yamagughi text
Mazda Comp 50% bigger ?
Brake Parts:
AP Racing 330m compared to stock, per wheel -2.6 Bernd Kluesener 05 Jun 1998
Vlaskis kit front, 355x32 Brembo disc, AP caliper, +2 Mark Valskis 21 Jun 2000
per corner wt ch compared to stock
Vlaskis kit rear 313x25.4 Brembo disc, AP caliper, -4.5 Mark Valskis 21 Jun 2000
per corner wt each compared to stock
Brake Rotors:
Stock iron rotors 11.6"x0.85" 15 SCC 4/99, p 200
Stock iron rotors 11.6"x0.85" 14.6 Shiv 02 Oct 1998
AP Racing 330x28 with aluminum mounting bell 11.9 Bernd Kluesener 23 Apr 1998
Brembo, OEM style solid face, front 15.4 Max Cooper 14 Nov 1999
Ikuta, OEM style solid face, rear 11.2 Max Cooper 14 Nov 1999
Cooltech MMC 14x1.25" one-off for Shiv 7.65 SCC 4/99, p 205
M2 AP Racing 13x1.2" 48 vane rotor 12.5 Shiv SCC p184 Nov 1999
Mandeville 13" big brake kit rotors 14-15 Wael 25 Jun 1999
Porsche 911 Turbo 12.7" 21 SCC 4/99, p 202
Porsche 322x32mm bi-turbo GT cross drilled rotors 15.3 Brad Barber/Fritz McKellar 22 Apr 1998
Stoptech 328x28mm (13.12x1.12") iron slotted on al hats 10 Gordon Monsen 15 Aug 1999
Stoptech 328x25 mm MMC with cast-in holes 4 Gordon Monsen 15 Aug 1999
Brake Pads
Hawk HP+ front, set of 4 3.2 Max Cooper 14 Nov 1999
Hawk HPS rear, set of 4 1.6 Max Cooper 14 Nov 1999
Brake Calipers:
Stock Mazda alloy caliper, front 6.20 SCC 4/99, p 205
AP Racing 3720 caliper 6.1 Bernd Kluesener 23 Apr 1998
Brembo Cooltech 4 piston caliper w/bracket 9.45 SCC 4/99, p 205
M2 AP Racing 4 pot calipers lighter than stock Shiv 16 Aug 1999
Mandeville big brake kit modified stock calipers 8-9 Wael 25 Jun 1999
Wilwood caliper 13.1 Brad Barber/Fritz McKellar 22 Apr 1998
Stoptech calipers for above rotors 6 Gordon Monsen 15 Aug 1999
06-12-07 | 06:36 PM
#75
2/4 wheel cornering fiend
Joined: Nov 2002
Posts: 3,090
Likes: 3
From: Pasadena, CA
LOL! I'm the only one here who has crunched any numbers. There's a lot of naysaying on your part but you've posted nothing to back it up.
Given the the 2660 claimed weight, the 1/8th tank of gas, and the weight of the jack and spare tire, precious little is left over for these extravagant claims for other weight savings. Post your numbers and make 'em fit within the given parameters. Otherwise you're just blowing hot air.
Given the the 2660 claimed weight, the 1/8th tank of gas, and the weight of the jack and spare tire, precious little is left over for these extravagant claims for other weight savings. Post your numbers and make 'em fit within the given parameters. Otherwise you're just blowing hot air.