well lets face it 300 hp on a rotary is very realistic,but normal driving is not,the more hp these engines push the more low end torque they lose.try taking off from a light with a cop behind you when your pushing 300 hp.you will have to take your rpm's up to 4k just to go without stalling.good luck.



30hp is pretty acurate,you will gain more hp from doing an exhaust job on an rx then over any piston driven engine.and thats a fact,

 

backseats where a factory option on the first and second gen.its called a 2+2.the common first gen with back seats is a gs model.mine came with back seats,took them out and did a custom interior,wish i never did!if you find one restore it original,this is a very very rare model.on the first gen,seconds gens are rare with back seats,but still much more common then a first gen.

 

yes there is im not ported and am damn close,not to mention i have a ton more work to do.will posts a big article on it.maybe later tonight,dont have time right now.

 

Well, cost wise, am i better porting and rebuilding my 12a or going 13b. I got a GSL with 141,000 on the 12a and a leaky apex seal (oil leaks from the engine block, so i assume thats what it is), so its going to need a rebuild soon. I dont got the tools to do a swap, but there is a place here that works soley on rx-7's. They are a bit pricey, but id trust them more than the mazda dealer. So should i ask them to drop in a engine from one of thier GSl-SE part cars from outback after rebuilding it, or should i rebuild and streetport my 12a.

 

if the engine is bad with wear and tear dont do either,jump over to the parts trader and grab one that already has the wrok done for you,i see 12a streetported with aftermarket carbs all the time,freshly rebuilt at that.offer your core to them or resell it there to help pay for the engine.trust me you will save this way.stick with the 12a though unless your going turbo.one thing everyone likes not to mention is the added weight of the 13b,plus it throws off that perfect 50/50 weight.also the intake takes quite a bit more to modify.its true the initial hp will be higher on the 13b,but lets say you were givin $500.00 to invest into both engines on the same car,you will come out on top with the 12a.the 12a is also a lot more reliable,will take more of a beating,and adjusts very well to modification.it loves an upgraded ignition system,free flowing exhaust,and a nice carbie.

 

Both engines have their strong points, although you will reach the limit of how much power can be extracted from a 12A before you reach the limits of a 13B. The 12A is more of a rev happy engine that makes its power at high rpm. The 13B on the other hand produces more torque at low rpm. I like both equally . Some day I want to port a repu 13B ... it has much bigger runners and only 4 ports... hmmm

 

I'm getting more convinced... I figure I'd be satisfied for a while with intake, full exhaust, ignition, and a carb, which can all be done relatively cheaply if I shop around carefully.

Throw on some wheels, a nice new nose (I'm sorry, but I despise the stock front nose), and a repaint, and it should be a nice (yet inexepnsive) car.

 

Bridge and peripheral port motors can have better VE and more torque than stock from as low as 2000rpm provided they are ported correctly and have a well designed tuned intake.

Also, all the bridgeports I've driven were easy to drive even with a button clutch and light flywheel. I certainly didn't have any problems stalling it from the lights.

 

Well just my .02 but I'm, only 17 and I have a stock 85 GSL and I plan on doing some mods, but my main goal is just to give the Hondas and Acuras and such at my school a run for their money, not necessarily beating them, but just keeping up with them so it doesnt look like my car is slow. I would be happy just keeping up with them, because the fun for me comes from the race itself, not if you win or lose (winning is better though ). As long as I'm not spanked in a race i dont mind losing, same goes for my dirtbike, as long as its fun. Just my opinion though, cause I know some of you out there are DETERMINED to have the fastest thing on four wheels . Anyway, just have fun with whatever your doing and who cares about anything else?

~T.J.

 

Fuzebox, now you're talkin .

Paul, definitely FLYWHEEL horsepower. Most spec RX racers that run the usual 12A w/improved carb, no cat etc (~130hp) only make 100-115 hp on the dyno.

I'd love to own a dyno and spend all day dynoing all cars I come across. I'm sure you'd find quite a few suprises... you'd probably embarrass alot of people too...

 

Wouldnt it be cool to have cool toys?

~T.J.

 

I think we are all missing the point of our first gens and why we love them so much. What is the appeal, everyone? Tossability, short gears, 8000rpm safe, unique engine and exhaust sounds. The cars just scream fun to the driver with every blip of the throttle, flick of the wrist, and turn of the wheel.

Just remember that these cars are not exactly cheap. They are old. That $2000 in engine mods seems reasonable, but then the car you get might need a new fuel tank (esp in Canada), shocks/springs,struts, bushings. They are just at the age to replace wear items.