Quote:
Originally Posted by 949 Racing
Street springs are just that. Optimized for street use on street tires, ok on track with those same street tires. With 255/40 200tw an advanced driver would have to run the shocks full stiff. It just would not be a balanced set up. Acceptable but you would never be amazed by it. Use a narrower more medium grip tire and an acceptable balance can be found on track and it's actually a lot of fun to drive.
An intermediate spring setup would be something that rides firmer than stock but still isn't firm enough for 255/40 200tw tires. So it wouldn't do anything perfectly and be so-so (by our standards) at everything. We try to get people to decide on one use or the other that they wish to optimize for.
But.. if you can't decide which to optimize for and just want to pick something in between then your spring rates would be somewhere in the 200 the 400 range. Our pre-configured spring packs will be far more cost-effective. If you want to do custom rates that's no problem. But that's going to add about $200 to the cost of the kit. If enough folks don't want our spring packs but want some intermediate springs, they would not be optimized for either street or track. If there is enough demand, we might consider a "Sport" spring pack for the second or third batch of shocks at the end of the year. To us that's just sort of a cop out though. We have had so many project cars around the shop over the years that we simply prefer something that's just a serious track rat and perfect there or it's an awesome daily that's acceptable on track.
Compromise is just that, a car that doesn't do anything well and you end up never wanting to drive it. We have been down that road and have learned to simply build optimized tools and just "own" that it won't be great for the other things.
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This has me super excited - you guys have done an excellent job with the R&D on these!
Question: I am in the crowd who has 17x9's with 245/40R17 BFG Sport Comp 2's. Will stay with this wheel and tire size indefinitely, but may switch compounds in that ~300 treadwear zone. Currently stock everything else, but am strongly considering the suite of mods that basically make up your "Big Grip Pack". My car is a daily primarily, which sees relatively frequent spirited canyon drives and the very occasional autocross. I have zero concerns regarding ride height - a touch lower would look nice but I like being able to get over driveways with zero hassle and these cars look great regardless
But for reference on your numbers, what is pinch weld height on OEM suspension?
Given that wheel/tire pairing and prescribed use, would the street spring be the move? Or would you recommend going one step firmer with the springs to account for the larger wheel/tire? I notice that your Miata Xidas have spring options galore - will the 86/BRXidas be the same way?