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RX-8 Race Weight

Old 03-04-2015, 04:30 PM
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RX-8 Race Weight

Hey guys,

I did a search for RX-8 weight in race trim and couldn't find what I was looking for. Has anybody checked the weight of their full race, stripped and caged RX-8s? I'm trying to make a decision on roll cage tubing size. Thanks!
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Old 03-04-2015, 04:43 PM
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There are a few threads in the racing section that list various weights of different trimmed cars, some stripped, some full interior, etc.
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Old 03-04-2015, 04:52 PM
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Originally Posted by RacerBowie View Post
I think even with a GOOD cage you can get an RX-8 down below 2350 plus driver with stock bodywork. That's all lexan, dash gone, etc.

Right now we're at 2487, and that's with the fuel quick fill assembly (heavy) and trans and diff coolers plus the seriously well-built Speedsource cage on our leftover Conti Challenge car. I think another 75-100lbs can come off before having to start spending money, even with keeping the coolers.

Of course I'm chasing a minimum weight of 2300 WITH DRIVER in SCCA E Production, which ain't gonna happen with this car. The GrandAm cage is way too stout.

Example from a trustworthy source.

Last edited by 9krpmrx8; 03-04-2015 at 05:00 PM.
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Old 03-04-2015, 05:33 PM
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Originally Posted by 9krpmrx8 View Post
Example from a trustworthy source.
I need to improve my search skills. Thanks 9k, you're the man!
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Old 03-06-2015, 03:12 PM
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I'd look at what minimum weight you'd need to hit for your classing anyway and go from there (unless it's unachieveably light - see also SCCA E Prod weight and similar).

Most of us end up getting the easy weight reduction stuff out of the way until we're a bit under minimum, then add ballast to meet the minimum spot-on. It's not like the RX8 needs a ton of weight relocation to handle well.
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Old 03-06-2015, 05:22 PM
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Originally Posted by kbrewmr2 View Post
I'd look at what minimum weight you'd need to hit for your classing anyway and go from there (unless it's unachieveably light - see also SCCA E Prod weight and similar).

Most of us end up getting the easy weight reduction stuff out of the way until we're a bit under minimum, then add ballast to meet the minimum spot-on. It's not like the RX8 needs a ton of weight relocation to handle well.


Thanks for the tip! I was a little worried about the weight because I want to build a rollcage with 1.5"/0.120" wall DOM tubing. Per NASA regulations, the car must weight less then 3000 lbs for that size tubing. I believe that this easily achievable now. There's a catch though, the car's original balance is going to be a little off due to an LSX swap. I'm trying my best to mount the engine as far back and as low as possible without cutting the crossmember, firewall or trans tunnel (I don't want to go TTU). The car has been stripped down to the bones and I'm eliminating any weight I can from the front and moving it towards the back. I will corner weight the car and see what I can do to keep the proper weight bias.
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Old 03-16-2015, 12:34 PM
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Down to 2434 dry now...
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Old 03-20-2015, 05:42 PM
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Originally Posted by RacerBowie View Post
Down to 2434 dry now...
That's pretty good!
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Old 04-08-2015, 03:23 AM
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My PWC car weighs 2500lbs sans driver and fuel, could weigh less but since the move to TCA has us weighing 2950 w driver theres no point...
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Old 02-11-2016, 11:40 AM
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Originally Posted by RacerBowie View Post
Down to 2434 dry now...
2419...
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Old 02-16-2016, 08:31 PM
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we are 2348 with full tank but our car has no roof or windshield lol we over killed on our cage could have been under 2200 but id rather live on a roll over
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Old 03-11-2016, 11:02 AM
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I searched but could not find an answer, what is the top 10 heaviest things to loose on to save weight, I have base 04 already swapped out the driver seat for fixed back and a 6 point. Thank you.
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Old 05-18-2016, 10:01 PM
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Weight

How much exactly does the 8 weigh ?
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Old 05-19-2016, 11:52 PM
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3,107.433333 lbs
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Old 05-19-2016, 11:55 PM
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My RX8 is approx. 2,620 wet (full tank of gas + roll cage)
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Old 05-20-2016, 12:18 AM
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^That's awesome
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Old 05-20-2016, 12:38 AM
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#renesislivesmatter

lmao.......
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Old 06-06-2016, 06:00 AM
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Ouch. I'm tracking my DD, a 2005 Base 6MT, and it weighed 3082 with 10 gallons of gas and me in it, almost stock (U1 battery, HKS hi power as far as weight reduction). at 185 pounds driver, that puts my car DRY at 2834 mostly stock.
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Old 07-28-2016, 04:19 PM
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The car is DD, 2004 EU HP (170kW)
1242kg all fluids (including 1.5L of oil for the Sohn), half tank of gas.
60kg welded roll-cage, and some modifications to windows, auto-fire extinguisher, no AC, Battery Deka for Harley, OZ Ultraleggera, AD08r 245/40 R18...etc.
Interiors looks like in the pics.

There are ways to improve but the car will be no street legal then...

Best regards
Attached Thumbnails RX-8 Race Weight-_mg_8681.jpg   RX-8 Race Weight-_mg_8674.jpg   RX-8 Race Weight-p1050388.jpg   RX-8 Race Weight-file0001.jpg  

Last edited by vcoil; 07-28-2016 at 04:22 PM.
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Old 08-08-2016, 05:05 AM
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In Spain we have a running timeattack rx8 is in 1.180kg with cage, but carries carbon fiber roof , doors, fiber , fiber gate , polycarbonate windows all ...

My rx8 is in process, still used by the street , so it has almost all the airbag , radio , speakers and even several panels, with a quarter tank weighs 1.320kg
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Old 08-10-2016, 12:03 AM
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Rules have a lot to do with how much you can remove and heavily limits you, most classes I know of here in the states are quite restrictive in terms of stock based classes compared to what I've experienced overseas in Asia and in Europe so more difficult to find the weight savings within the rules.
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Old 07-03-2017, 05:18 AM
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1260kg in metric. That's about 2777 lbs
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Old 07-03-2017, 12:04 PM
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Originally Posted by Ethanman View Post
How much exactly does the 8 weigh ?
The 2004 - 2005 Base model (no DSC) RX-8 6-spd were the lightest around low-mid 29xx lbs as delivered from Mazda. EDIT: A link to stock parts weight is listed in my next post down below this one.

Still waiting for someone to build a Titanium power plant frame (PPF)




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Last edited by TeamRX8; 07-20-2017 at 11:53 AM.
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Old 07-04-2017, 01:22 AM
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I am going to have to get my white 2005 Sport model under the knife soon to see where we're going to end up on the scales. This is all great information though!
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Old 07-04-2017, 10:58 PM
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For the S1 model this is probably the most comprehensive thread on OE part weights though some of the later posts aren't updated on the front page

https://www.rx8club.com/series-i-tec...8-parts-81791/



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