Hello there. I'm actually new as a member, but have been reading this forum for a few months now. I recently (three weeks, and four days ago) made the choice to opt for a new car, my all time favourite, the 2nd gen RX-7, prefferably a '91, or '90, turbocharged.



The questions I have about it is



Engines: What model of engine is in the 2nd gens

And is it possible to stick a 13B in there?



Horsepower: Hopefull some tips on what to get, (filter, exhaust,), and some other tips on which ways to get horsepower rather than just these two items.



Reliability: Please, any kind of information, like is the car reliable, any negative opinions, to general kind of car



Fuel mileage: Is there any way to boost the fuel mileage up a little higher?





Thank you so much for your time.

Oh, forgot to mention, I've been studying the apex seals as well for a rotary, and I'd like to make my car perform well, but moderately so.



Huge boost won't be a problem, cause I don't want heavy power, but the seals also come in play, incase I decide to up the psi a bit. Will the Atkins 2mm seals work great, or should I just stick to mazda's seals, and rebuild the engine anyway? I'm just worried about wear down of the seals, and if they break :P Oh, for performance, I think I'll use a boost adjuster (controller) to up the horse power a bit for some added fun.



And for the love of god, can someone explain to me the importance of a larger wastgate?

I'm moving this to the 2nd gen section...you'll get a better response there.

ok. the 2nd gens are a 13b. the turbo models are single turbo, you might have been asking about a tt 13b from a 3rd gen. the series 4 (86-88) was a little diff than the series 5(89-91) the s5 has a little more power, i dont know the exact numbers. there are a lot of things you can do for performance. filter wont really help that much. exhuast for the TII (turbo 2 which is the turbo 2nd gen) the racing beat full exhuast i think is the best for the TII, it increases hp by 30%. bigger turbos will bring more power. the seals i dont know much about bc some people run fine on stock 2mm ones, some people get the upgraded 2mms or go for the 3mms, its just what you think, or find out when you break one but at that point be ready to rebuild a turbo due to the seal flying through it and also rebuild the engine due to the seal trashing the rotor housing. porting will get you some more power, i dont know that much about that though. adkins rotary is very respected so anything you get from them will be pretty much the best you can get. where are you at? do you have emissions laws? the reliability of the car is debatable, some peoples break a lot, some dont. if you are looking for an s5 TII i know where one is with lots of mods that doesnt need much to be at most a 12 second car. theres lots more that i dont know as i am not a TII owner. youll find all the help you need on this site though

2nd gen motor is a 13b

horsepower modifications comes down to what you can afford..note that its typically a domino effect..

although in relation to reliabilty and fuel consumption..it decreases proportionally as your mods or hp increases..

3mm seals are used for insurance...2mm can handle high boost with proper tuning..

ported wategate prevents boost creep as a result of the inability to evacuate the exhaust gasses efficiently

base horsepower for the series four tii is 182

whereas the series five had 200

off topic, what are the numbers for the NAs? at the wheels if possible

Its a good idea to be looking at the 89-91 Model year fc's, in my opinion the 86-88 cars are bags of poop! Just first concentrate of making the car run and look like new before cranking the boost up.



If i ever get a s5 turbo2, the first thing it will get is a haltech, and larger injectors and a nice fuel pump, then i would begin to add more freely flowing exhaust, and performance air intake. I have seen quite a few people pop turbo motors because they added downpipes, exhaust and intake before upgrading the "already stretched to the limit-at-stock fuel system" components. Just be cautious and ask plenty of questions here before adding a go-fast goody https://www.nopistons.com/forums/pub...1047683827.gif .

series four na basehp was 146

versus series five na of 160

numbers went up for the mileage and torque as well

your basis for this comment is what?