That means these will bump me up to SP5. I don't really want to stay in SP6, as my only competition has been one other car, but I'd like to be able to keep up with the pack when I do move to SP5.3rdgendennis wrote:I'm sure Walter will confirm, but I am under the impression that non-stock induction does in fact mean any variation from stock. Cold air intake, non-stock manifold, non-stock TB, etc.I love that way of thinking! Can't wait to hear it with these!drummingpariah wrote:In short, if you're considering ITB's for logical reasons, stop now.
Unless I do some headwork, compression-raising, and cams, it won't sound amazing. Luckily, parts are cheap and I could do all that reasonably easily. I don't think any of those affect class, oddly enough. It's like free power.
Nobody else is silly enough to run a 1.6 or stock suspension. I ran U6 at Ascutney, but these (plastic) stock radiators are prone to catastrophic failure after 100k miles, and I replaced it with an aluminum version, which bumped me to SP6. That's where I've been ever since.dsldubn wrote:cool. I've seen some vws make good power with itbs in the past, so was curious. I'm sure port work and cams help much more...but every itb car I've heard is pure music, love the sound.
I was only curious of class because the other miatas are in SP5. I couldn't even remember if you ran in U or SP class last time I was at the hills
Classification
- SP5 cageless ITB build - If I keep the ITB's, I'll also upgrade to coilovers, good anti-roll bars, and some r-compound tires (on another set of the stock 15x6 wheels that weigh about 8grams for a set of 4).
- SP5 cage ITB build - Adding a cage would allow me to upgrade to 15x9 wheels and a proper exhaust. I would still end up pretty power limited, and 15x9 might just be too much wheel/tire to push around with so little power (estimated 100-125whp after raising the compression and camming it).
- SP5 cage turbo build - At the polar opposite end, I could forego grip upgrades and make more power with the little saab t3 I have in the basement. This is certainly the most sensible path if I want to be competitive, and would make for the best daily driver (this is my daily, after all).
- SP5 cage turbo build (non-intercooled) - I don't think this is a good idea, but if I can make it reliable and durable, it is the most competitive SP5 build I can come up with. It gets the best of all worlds: respectable power output (estimated 150-200whp or so), anti-roll bars, 15x9 r-compounds (please don't flip over due to soft springs in hard corners). I would have to spend some time setting up e85/water injection to cool the intake/combustion charge, which puts even MORE tax on the MegaSquirt2 system. This is the plan for the Datsun (to keep it in SP4), but that engine is quite a bit more durable and is running MegaSquirt3, with quite a bit more capacity for 'advanced feature management'.