d!ck wrote:the easiest way to do it that i have found goes like this:
- have the input shaft on the miata transmission machined to accept the 13b. this is a lot easier than it sounds and they are basically the same transmission with slightly different gearing. the benefits are no firewall/trans tunnel modification required and i HEAR that a lot of rx7 racing guys appreciate the gearing of the miata trans and swap to them anyways.
- custom mounts and oil pan for the rotary. like charlio said, need a welder and also need to persuade the rails on the miata to get it to work. the 12a or early 13b front cover (?) provides a mounting position, too.
- exhaust dump out of or under the front fender. sounds mean, right? fits with where i am taking this car.
- haven't figured out management yet, that is where rotary expert input will be required. a lot of the guys who have swapped are simply running carbs, i'd like to try something else.
im not going for balls-out power yet, so this is just something that i'd like to have as opposed to an autocross monster or track whore (yet). once i feel like i need more power, i would have to go with the beefier transmission and rear end etc... i'd still like to keep it rotary though.
NA RX-7 guys DO love the Miata gear ratios. They drop the Miata gears into the NA trans though, I don't think the bell housing of the Miata trans works.
Use the GSL-SE front cover. WAY less work.
NO NO NO. Have you heard a rotary uncorked with such a short tube? The car will not be able to even idle on the street, and it will exceed the noise regulations for most tracks. I've got 3 HUGE magnaflows on my '7, and it's still boy-racer loud. A fantastic sounding loud, but still.
Megasquirt! One of the EVIL forum's only good points is muythaibxr's work with Megasquirting the rotary:
http://www.rx7club.com/forumdisplay.php?f=153