Preparing my car for sprinting

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dern
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Preparing my car for sprinting

Post by dern » Wed Sep 07, 2016 9:39 am

Hello,

I'm going to be preparing my new (to me) car for track days and sprinting next year over the autumn/winter and don't want to do anything to it that leaves me unable to compete in sprints in it. I could use some advice as to what class it would be in and what I'm ok doing to it and what I can't.

The car is a 2004 Mazda rx8 which has insurance, tax and an mot and is in regular use.

The engine is ported and does produce more power than standard although probably not more than Mazda claimed when it was new.

Suspension is standard except for Eibach springs and Racing Beat anti roll bars.

Everything else is standard.

The stuff I'd like to do is...

Replace the driver's seat with a more supportive and lower design.

Fit a harness for the driver's seat and this will either require a half cage or a full cage... not sure what I need for my class.

Remove a fair bit of the interior, especially the head lining, rear seats, carpets and sound deadening.

Based on the above do you have any idea what class I might be in, what tyres I might be allowed to run and whether I need to keep an operational sunroof? Additionally, would I be allowed to fit any aero such as a wing and a front splitter?

Many thanks,

Mark

Redmist
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Re: Preparing my car for sprinting

Post by Redmist » Fri Sep 09, 2016 6:27 pm

Everything sounds ok for roadgoing until you said remove seats carpet etc. In roadgoing it all has to remain with it's linings carpet and seats. So this will put you into roadgoing modified . Just look up on google the ACSMC class structure for engine size for class etc.
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Woodcote,just love that kerb !

dern
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Re: Preparing my car for sprinting

Post by dern » Fri Sep 09, 2016 6:43 pm

Ah, I rather suspected as much. Thanks very much. I'll check the book for the rest of what I'm allowed to do and what's required.

Are you by any chance Rob with the red stylus?

Regards,

Mark

dern
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Re: Preparing my car for sprinting

Post by dern » Fri Sep 09, 2016 7:17 pm

That's great, thanks very much. It's easy when you put it like that. I've contacted safety devices to see what cage for my car meets K1.6.1 or K1.6.2 but it looks like the rear cage only will do the trick and be perfect for what I want.

Are you Rob with the red Stylus that made the wishbones for my white rotary engined stylus by the way?

Regards,

Mark

dern
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Re: Preparing my car for sprinting

Post by dern » Sun Sep 11, 2016 12:21 pm

Hmm. Both replies posted, thought the first one had been lost. Is there a point where my posts won't be moderated?

Thanks

Redmist
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Re: Preparing my car for sprinting

Post by Redmist » Sun Sep 11, 2016 8:24 pm

Yes , you're right Mark , I built your rodended wishbones for the Rotary Stylus ' beast ' :D There's no hiding round here is there :lol:
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Woodcote,just love that kerb !

dern
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Re: Preparing my car for sprinting

Post by dern » Tue Sep 13, 2016 4:02 pm

Would would the best person to ask to clarify some things in terms of regulations and classes? For instance, I received this message from safety devices about their half cage that I'd like to use...

Thank you for your email. All parts of the Z022 roll cage for the Mazda RX-8 meets the current MSA bluebook standards to K.1.6.1(it doesn't confirm to K.1.6.2 as it does not have a diagonal in the main hoop).
As long as your vehicle is considered a production car and is under 2000 cc the Z022 rear half roll cage can be used alone unless otherwise specified in the regulations of the event you're participating.

...however, there's no mention that I can see about different requirements based on engine capacity I can see in the MSA book.

The ACSMC book says...

Modified Series Production Cars (S.10.10.3) and Modified Specialist Production Cars (S.10.10.4)
Excluding Motor Cycled engined cars:
9. Up to 1400cc
10. Over 1400cc to 2000cc
11. Over 2000cc

...where my car is a Modified Series Production Car (10.10.3) but again there's no mention of engine size against different requirements for roll cages. Basically K1.16.1 is fine.

Also, I'd assumed that the engine capacity for my RX8 would be 1308cc which would be 1962cc with the 1.5 multiplier. However, my V5 states that my engine capacity is 2616 for the purposes of taxation so is my engine size now 3924cc? Seems a bit excessive.

Anyway, who would be the best person to call that could clarify all this before I spend money on the car?

Thanks,

Mark

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