RX-8 Race Weight
03-04-2015, 03:30 PM
#1
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!
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!
03-04-2015, 03:52 PM
#3
SARX Legend
iTrader: (46)
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.
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 04:00 PM.
03-06-2015, 02:12 PM
#5
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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.
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.
03-06-2015, 04:22 PM
#6
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.
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.
03-11-2016, 10:02 AM
#12
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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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yomomspimp06 (03-04-2021)
05-19-2016, 11:18 PM
#16
^That's awesome
06-06-2016, 05:00 AM
#18
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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.
07-28-2016, 03:19 PM
#19
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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
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
Last edited by vcoil; 07-28-2016 at 03:22 PM.
08-08-2016, 04:05 AM
#20
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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
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
08-09-2016, 11:03 PM
#21
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.
07-03-2017, 11:04 AM
#23
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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Still waiting for someone to build a Titanium power plant frame (PPF)
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Last edited by TeamRX8; 07-20-2017 at 10:53 AM.
07-04-2017, 09:58 PM
#25
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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https://www.rx8club.com/series-i-tec...8-parts-81791/
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