OneFastMiata said:
Yeah, Im a little unclear on these things especially since Im pushing 400hp through stock miata parts without problems. If you asked on miata.net if transmissions hold up to that sort of power you'd be told that they usually fail around 275.
I daily drive my car at 347rwhp for the past 3 years without fail and also have drag launched on MT/ET slicks on tracks sticky with VHT. I guess it depends on how you shift etc which is why it makes it such a gray area for me.
I did blow up one torsen LSD but I dont believe it would have happened if I had not experienced wheel hop. I replaced it with a KAAZ unit.
This is not surprising as the Miata is a truly overbuilt car. As you have experienced, it can stand up to 3x stock HP with not so much as a whimper except for the rear end (which break even with stock motors).
The only other Japanese car in recent memory that can boast handling similar increases reliably is the Supra Turbo.
Hondas are notoriously bad at this. Try increasing a Honda motor's output 100% without totally re-engineering everything in the powertrain and you better have AAA. Even a 40% increase on an NSX results in (very) expensive bits liberating themselves. Personally, I don't consider this a weakness. In fact, I admire Honda for making powerplants that make a lot of power for their displacement and weight. They are carefully designed for their output level and will last close to forever with maintenance if power increases are kept to the 220% range.
Like many of you, I hope that Toyota left some margin on the table to handle some increase in power. It would be nice to get a nice boost from cams, intake, exhaust, etc without having to build a stronger bottom end or tranny / diff / shafts, etc.
Ara