Budget Street/Autocross/Track 2.5 NC Project!

Miata Parts, Intakes, Superchargers, Headers, Exhausts, Shocks, Springs, Sway Bars, Brake Kits, Autocross and track mods.

Re: Budget Street/Autocross/Track 2.5 NC Project!

Postby DanielS172 » Tue Feb 05, 2019 11:34 am

Brian, would you mind answering the following about your preferred setup with the MeisterRs with the 7/5 springs?

Damper settings front/rear
Preload
Sway bar type and settings front/rear

I'm currently running mine at 16/19 front/rear damping, 2mm preload, and FM front sway with no rear sway. I'm still playing around with settings, might change preload and put the stock rear sway on to see how that changes things. I'm just curious as to what your preferred setup is with these coilovers.
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Re: Budget Street/Autocross/Track 2.5 NC Project!

Postby Brian » Tue Feb 05, 2019 11:40 am

DanielS172 wrote:Brian, would you mind answering the following about your preferred setup with the MeisterRs with the 7/5 springs?

Damper settings front/rear
Preload
Sway bar type and settings front/rear

I'm currently running mine at 16/19 front/rear damping, 2mm preload, and FM front sway with no rear sway. I'm still playing around with settings, might change preload and put the stock rear sway on to see how that changes things. I'm just curious as to what your preferred setup is with these coilovers.


Too many variables for much meaning in the comparison, you have FM front sway and no rear, we have prototype set of RoadsterSport set front AND rear (that alone means our front to rear balance is MASSIVELY different). That said, around town 20/18, for canyon fun we made that 12/10 and balance was good but again we have front and rear sway upgraded.
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Re: Budget Street/Autocross/Track 2.5 NC Project!

Postby Brian » Tue Feb 05, 2019 2:52 pm

The journey to make a decent flow formed NC 16x8 wheel.

Test fit without wheel studs of 4x100 16x8 Dekagram just to see if it has clearance to rear links, an issue for most 16 inch wheels on NC. Yes, it clears. Need to change to 45mm offset instead of 35mm, and change to 5 lug also means need to change to 690 load rating because they could end up on the wrong car that is much heavier since the 5 lug arrangement is usually on a much heavier car.
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Re: Budget Street/Autocross/Track 2.5 NC Project!

Postby Brian » Tue Feb 05, 2019 2:56 pm

Where the crazy people live....in another experiment!
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Re: Budget Street/Autocross/Track 2.5 NC Project!

Postby VernonA420 » Tue Feb 05, 2019 8:35 pm

That's wild. Helmholtz Race Dual. :shock:
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Re: Budget Street/Autocross/Track 2.5 NC Project!

Postby njaremka » Wed Feb 06, 2019 1:53 pm

Brian wrote:Where the crazy people live....in another experiment!


:twisted:
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Re: Budget Street/Autocross/Track 2.5 NC Project!

Postby LateNights » Thu Feb 07, 2019 6:01 am

Brian wrote:A few weeks of hard driving in the MeisterR Coilovers with 7kg/5kg. First day started rough, sharp impacts seem to reach the driver regardless of the adjustment. BUT, they seem to break in with some miles and by the end of the journey I find this 7kg/5kg setup reasonable for the dual purpose owner looking for reasonable street/autocross/track value in a coilover setup.


Ideally I'd like to see what your thoughts were with a slightly softer spring rate - these sound just a little on the harsh side for a proper dual purpose car, instead sounding like a true budget track toy option?

The CRD also isn't a huge leap in price iirc, so it'll be interesting to see what the verdict is between the two!
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Re: Budget Street/Autocross/Track 2.5 NC Project!

Postby Chuck H » Thu Feb 07, 2019 6:31 am

Brian wrote:Where the crazy people live....in another experiment!


Love the concept, but changing a couple of details would quiet it down a bit more. Instead of using a 2.5" Y-pipe, switch it up to 2.5" in/2.0" out, and use 2" piping after the split with mufflers with a 2" core. You may even be able to make the mufflers out of the same body as the resonator appears to be made out of, being an inch or two larger in diameter with 2" in/out. That way you can probably use the same tips as the Super-Q and most of your other dual outlet mufflers with 2" outlet pipes, too, with removable baffles.
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Re: Budget Street/Autocross/Track 2.5 NC Project!

Postby Brian » Thu Feb 07, 2019 6:37 am

Chuck H wrote:
Brian wrote:Where the crazy people live....in another experiment!


Love the concept, but changing a couple of details would quiet it down a bit more. Instead of using a 2.5" Y-pipe, switch it up to 2.5" in/2.0" out, and use 2" piping after the split with mufflers with a 2" core. You may even be able to make the mufflers out of the same body as the resonator appears to be made out of, being an inch or two larger in diameter with 2" in/out. That way you can probably use the same tips as the Super-Q and most of your other dual outlet mufflers with 2" outlet pipes, too, with removable baffles.


Yep, I sketched out the details for the fabricator and he could not read my scribbles on pipe size. And we know from plenty of dyno experience that the 2 inch pipe after the split costs us nothing on power, plus 2 inch pipe would save us weight in the setup.
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Re: Budget Street/Autocross/Track 2.5 NC Project!

Postby Chuck H » Thu Feb 07, 2019 11:40 am

Yeah, running through the geometry, dual 2 inch pipes flow the equivalent of a single 2.75 inch pipe, so they're plenty for a N/A 2.0L or even 2.5L engine. Dual 2.5 inch pipes is the equivalent of a single 3.5 inch, which is enough for the craziest turbo motor anyone could stuff into an NC chassis (good for 460 hp before they even start to be a restriction). :wink:
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