I just recently weighed my stock base rx8 without me and a full tank of fuel it weighed 2960lb. Without fuel that would be 2863lb. I'm trying to do a apples to apples comparison, but i can't tell if the specs that are listed in the FAQ are with/without fuel.

I did a weight seach, but everyone seems to have modified the cars so they are no longer stock. Does anyone have the weight of the R1 /R2 with a full tank of fuel or dry with no fuel so I can compare?

many thanks.

 

IIRC, the weight of the R1 is 2787 lbs w/o gas, u need to search man, there are plenty of threads that have gone over this

 

Thanks, again, I tried to search through the threads on this, but I could only find people who had modded the car or didn't have a handle on the gas level. I try to not post questions with out a real search.

On a similar subject, when the automakers post the specs, is that with a fuel tank of fuel? Such as a brochure?

 

i dont think so, unless it is stated

 

Just filled up and drove the car on the scales a few weeks ago at the track.
2810 lbs. Close to stock, a few things modified or removed, a few things
added, including a 70 lb roll bar... should give you a pretty good idea though.

 

I think the R1 is listed as 2800lbs... a base is 2789, and i think the touring was 2862lbs... makes sense that the R1 weighs more with its dual oil coolers, front strut bar, and front and rear spoilers...

 

+20 gallons of gas (5lbs per gallon?) = 2887

 

R2 stock trim ontrack scales, full tank gas, no spare, w/o driver 2792 lbs weight

 

Car manufacturer's specs are typically "dry" weight - i.e. without coolant, oil, or gas.

 

Wow, thats light...are you sure about that given the above posts?

 

Weighed mine when it was still new to me, 2751 w/ about half a tank of gas, no spare tire, no driver. Everything else was stock.

Just throwing out another number.

 

My 93 R1 weighed 2796lbs with a full tank on SCCA scales.

My mods to the car shouldn't effect weight much. DP, CB and smaller battery (9lbs lighter than stock for the battery) lightened up the car but the M2 IC, cruise control, stock CD player, GAB R shocks, larger front sway bar and J-spec rear seats add the same if not more weight.

Jack, spare and all tools were in the car.

At the same time we weighed a 94 Touring w/full tank with the same mods and all R1 parts installed at 2920lbs IIRC.

Jeff

 

The standard is to use wet weight - with all fluids, including gas. The weight of a car without coolant or oil is pretty much irrelevant because the car would be inoperable.

The numbers people are reporting here (and in previous threads) pretty much gel with a wet R1/R2 weight of 2800 lbs.

 

I agree the "wet" weight (+/- driver) is the appropriate weight to use for comparison and performance (wt/hp ratio) purposes. My point was that what you typically get from the manufacturer is dry weight and you have to add the weight of the various fluids to get there.

 

Manufacturers give wet weight. The quoted manufacturer's weight rating for an R1, for example, is 2800 lbs. People are reporting getting very close to that weight with a full tank of gas.

If that were a dry weight, with a full tank of gas (20 gallons at ~6lbs per gallon = 120lbs), coolant (~25lbs), oil, power steering fluid, windshield, transmission, differential and brake fluid, they would be reporting figures in the 2950 lbs range.

 

So in a apples/apples comparo with the RX8 the R1 is 160lbs lighter. Weight to power ratio 2960lbs/238 hp vs. 2800lb /255 hp. 12.44lbs/hp or 10.98lb/hp.

Figure that a FD's engine, trans, diff and axles are all heavier than the RX8 pieces. The FD body is probably lighter.

 

OK, moconnor, you're right - "curb weight" is defined as "The weight of a fueled automobile with standard equipment but without cargo or passengers." Most of the manufacturers I just checked list "curb weight" in their specs - I must have been thinking of something else or having a brain fart at the time.

 

In other words, the rx7 is a better performer. And, you can't get one off the dealer.

Has anybody made 300hp on an 8 yet?

 

with Nitrous I think they have gotten close to 300. The FI kits are all near being completed, our ECU is a pain to crack so its been the computer thats holding it up.

I'm really interested to see what the porting experiments turn up in terms of power. I bet a NA 300hp at the crank renesis is possible with porting/ecu and breathing mods.

 

And the 7 doesn't come with a warranty.

I love the concept of the 8/FE and I like the car a lot. Car and Driver just named it one of the 10 Best.

The FD and FE aren't made for the same market so they shouldn't be compared in the same way. The FD and FE have very similar suspension systems. Double control arm front and rear is hard to find in production sedans so Mazda should be applauded for spending the $$ on suspension on the FE.

Jeff

 

I think you can make a FE into a FD handling wise, as I have the full Mazdaspeed suspension package I should be pushing .95-.97g (I need to test to find out), as for power, its wait and see from Mazdaspeed and the aftermarket.

There is no question the FD is proably the most purpose build race/atuox car ever marketed by a non exotic company. I've been reading the old mag reviews and they are quite entertaining.

Personally, I want the next 7 to be my engine with a bit more power, and 300lb lighter. I like the idea of selling a great car, that with some Mazdaspeed FI add on's becomes a terror. That and the price is reasonable for the base car.

 

Auto-X circles first believed that the R1/R2 package was not the way to go due to extra weight of the unnessary wing and oil cooler over the Base model. Very few detail specs were reported on what is really different with the R cars by Mazda ..result of very small production rate ..., but the RX7 Book talks about extra weight saving program, this model received .. through less sound proofing, etc. I think it shows up on the scales, I know back when my car was 100% stock and 30 plus RX7's were in a Super Stock class, that I was lighter than those Base models, even with my one luxury concession of a CD player.

Also was funny that back in my poor stock days that I had higher top speed than my friends also stock Touring model, I never delved into it but wondered if all ECU's were created equal. Car companies have played off-record tricks before on low production models for the enthusiast whereby the original OEM part is "better" than the parts list replacement.

OBDII (the tattle tail black box)required by law in 1996 made many car companies very honest and killed performance cars from the market "due to lack of demand"

 

....100% pure stock days...

 

I've cut apart R1 models and Touring models, haven't seen any difference in sound deadening. I think it is a myth.

http://community.webshots.com/album/89560034SgoVwL

Maybe you had a little less gas, etc. It takes A LOT of sound deadening to make 20lbs even, that sort of thing would be easily recognizable upon teardown. It would also make a noticable difference in how loud the cars are on the road. I've owned 15+ driving FDs and driven 30 of them or so, I haven't really heard any differences in them.