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Last Post 23 Mar 2013 07:06 PM by  Canyonfive
Occasional autoxer and DE car wants to get more serious
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New Member
New Member

25 Oct 2012 01:43 AM

    Hey guys,

    Great forum here. I've been tinkering around with this great little 90 Miata and it's a great combination use car. Autox, DE, some street, not my daily driver though.

    I've done 3 DEs and wasn't hooked, even with that huge difference in seat you get. :) So I'm looking on which way to take my autox experience a little more serious. I'm decent behind the wheel and can hold my own I feel but I need to get the car in a proper class. Seems the 2 ways to go would be CSP or STS. Either way I need to remove some parts and add a lot more and both really. I'm just learning the SCCA classes and what it takes to be competitive, btw I'm in Portland Oregon area. Most of my autox time over the last few years has been with the Oregon PCA so classing for me was Non Porsche Street tire, which I was at the top a few times with Boxsters and BMW Z4s.

    So I'm not sure which direction to go, I don't want to totally change the car into something unstreetable or remove all the fun goodies it has now but I do want to join in the local competition. This will be a strictly local car. Please share some advice to which direction I should go and how to get there. Can I be competitive in CSP without an engine swap, start taking off parts and stick with STS, could be a lot of fun.

    1990 Miata 1.6 NA

    Current mod list


    · Ground Control coilover 375F/250R

    · Koni Sport Yellow shock

    · FM front sway bar with heim joint end links, no rear bar

    · FCM top mounts and bumpstops

    · Strut bar

    · TRM C1 15x7 et25 wheels

    · 205/50/15 Dunlop Star Specs

    Engine and Accessories

    · Custom cold air intake

    · Depowered power steering

    · Momo wheel, hub and NRG quick release

    · Non A/C car

    · Racing Beat Power Pulse cat back exhaust

    · Removed charcoal canister

    · CX Racing radiator and new hoses


    · Fidanza 7lb flywheel

    · Open differential


    · Soft top delete

    · Hard Dog double diagonal roll bar

    · Hardtop with Rennenmetal brackets

    · Front and rear tow hooks

    · Boxed in frame rails

    · DIY HD front lip

    · Center console delete (easily replaced)

    TSI turn signal intakes

    So my first couple of small things to do I think would be

    -header and high flow cat

    -second set of wheels with R comp tires for CSP

    New Member
    New Member

    25 Oct 2012 01:47 AM

    You can see my white Miata here at my friend's blog write up where we attended a very slippery autox at the local kart track.


    Basic Member
    Basic Member

    28 Oct 2012 07:21 AM
    I think most everything you've got now is legal in CSP except for the boxed frame rails. There are some allowances for sub-frame connectors in SP but you'd have to read that section to determine if what you've done is SP legal or not. STS is more streetable but you'd have to reverse some of your mods like the depowered rack and lightweight flywheel, so CSP would require fewer changes. For local events your 1.6 would be plenty of fun with some R-tires. A limited slip diff would come in real handy, depending on your suspension setup/droop.
    Veteran Member
    Veteran Member

    28 Oct 2012 08:50 AM
    Frame rails have to go for SP.
    New Member
    New Member

    23 Mar 2013 07:06 PM
    You are not authorized to post a reply.

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