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 Post subject: RX-8 drivetrain weights
PostPosted: July 10, 2017, 9:07 am 
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Joined: February 23, 2017, 12:45 pm
Posts: 11
I'm starting in on building a Lotus inspired car that I'm basing off an RX-8. I'll be using the entire drivetrain from the 8. Front and rear subframes and suspension, engine & trans. The 8 was my daily driver til it was rear ended and written off by the insurance company. There always seems to be people looking for/arguing over weights of these parts. I bought a hanging digital scale and got some hard numbers.

Front subframe- 198lbs
Rear subframe- 298lbs
Transmission- 103lbs
Complete engine including flywheel, clutch & exhaust manifold= 297lbs

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Last edited by banzairx7 on July 10, 2017, 3:43 pm, edited 1 time in total.

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PostPosted: July 10, 2017, 10:24 am 
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Mid-Engined Maniac

Joined: April 23, 2006, 8:26 pm
Posts: 5747
Location: SoCal
Yeah everyone thinks rotaries are light - that weight is very similar to current 4-cylinder engines. My complete FWD Honda K-series drivetrain was right at 400 lbs as well.

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PostPosted: July 10, 2017, 9:02 pm 
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Joined: January 11, 2017, 11:06 pm
Posts: 59
Hmm, I'm currently racing an RX8 until I finish the locost, and seriously considered doing what you are doing. One word of caution, check the track width - especially if you are going to try to reuse the entire subframe. You may find it's a heck of a lot wider than it should be in a car like this.


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PostPosted: July 10, 2017, 11:20 pm 
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Joined: February 23, 2017, 12:45 pm
Posts: 11
I've been working on the chassis for the last 2 months or so in CAD. Track looks OK but I am running a +4 chassis design so that helps. This design uses inboard shocks in the front too. There was no way to make shocks look right in the stock locations.


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