ok, heres the deal, i am not car stupid, but I am rotary stupid. I am gettin my first RX7, an 88, and i dont know anything about the motors at all. I am curious what i should do? I am going to buy a rebuilt motor with a 2 year warranty, but i can also get it ported, i want to run about 250 HP to the wheels, is that reasonable? i want to b able to hit about 300 with nitrous. is nitrous safe for rotarys? is 250 a good all motor number? what kind of mods do i need to hit that? what kind of portjob would be the best. i do have a reasonably large budget/credit card, and i am willing to spend a lot to make my car get these numbers. but i dont want to turbo it.

 

your limit with a streetable car N/a is going to be around 180-200hp TOPS! With nitrous(its safe it you use it properly) you could probably get to 250 but I have never heard of people using it and getting those numbers N/a. If you want a "race" car which means what it says "race" car not your daily beater you can get around 300hp from a peripheral ported engine. But that is very expensive.

 

^------the man speaks the truth ------^

 

Yeah, there is no way in hell you will make 250 on an NA without some serious ****, It would be pretty easy on a T2 though..

 

hmmm, that sucks, i mostly wanna run a low 13 second quarter becuase nobody in my area would beat me. the reason i dont wanna boost is cuz its too damn complicated. too much stuff goin on.
hows this sound
13b street ported
fuel rail, fuel pressure regulator, injectors, header, full exhaust, coldair, nitrous, n prolly an after market ecu. would that make a good amount of HP?
like i said, i know nothing about rotaries, if all else fells ima put an f*n small block chevy in it. its only a 500 dollar shell in almost perfect condition, but it dont run

 

I would say you have two options:

1 strip the hell out of the car and make it BARELY legal to drive and add every thing you can possible to increase horse power and hope you get lucky and run a 13 1/4

2 sell the N/a and buy a TII. < much easier if you only care about HP.


3 buy a stang.

 

Turbo isn't that complicated since they came turbo stock it's not a big deal and if you were to just buy a new turbo motor and get a full exhuast and a few other things you could be right where you wanna be

 

ee, i can get a t2 motor without turbo n manifolds for 1650, i think thats what the guy said at least, but im scared of boosting, specially on a motor i know absolutely nothing about. on a honda id be because they will blow, but i know how to rebuild those. but i have no clue bout 13bs, so im scared of breaking stuff. but i am starting from scratch and the way things are lookin ima be converting my nonturbo to turbo, or is thjat a crazy project? cuz i want HP, i want TORQUE, i want SPEED. I dont wanna be made fun of by my uncles for driving a 15 second Honda, i wanna show their novas n mustangs what i got.

 

TII= your answer.

 

what kinda port would i do on a tII? or any? n how much in mods am i lookin it. is it hard to find parts? cuz all ima get isa rebuilt short block.

turbo would be really cool though. psshhhhh!

 

Basically with a full "non legal" exhaust your power jumps around 60 horse. You need to get an FCD and more fuel at that point. Get a fuel pump and maybe some 680's for the secondary slot. Then get an MBC or EBC and crank up the boost to around 11 PSI If that doesn't get you to ~250 then go for a BNR hybrid turbo. I think the stage 2 or 3 will do for 300 hp. I would also invest in reliability mods.(do some searching to find out what these are)


Santiago

PS- I'm new at this too so don't take my advice as law or anything.

 

see now thats all too much for me. ill probly endin up throwin in a street ported n/a, beatin the **** out of it and sellin it 4 months later. i am 19 and have own 13 cars so far. so i like to go through em fast, donreally wanna put a bunch of work and electronic gizmos in my car.

 

Heh I hope you don't think you can half *** anything on a 7. You'll loose the engine faster than a pig jumps in mud.

 

You can make a 7 fast but it ain't as cheap as some people would lead you to believe.

T2 ported motor - 1500-3500
Tubo upgrade - 700
FMIC - 840
Stand alone - 1000
Fuel (pump, rail, injectors) - 500

high 11's

 

Oh and I forgot

exhaust - 800
intake - 200
tires - 300

 

Kevin Landers has a turbo upgrade that he says will put you to 280 with the Racing Beat exhaust and some fuel mods... I want it... He's building my engine this week... Woo!!

 

At least I think that he still has it for sale

 

Stock block with exhaust and intake will support a 200 hp shot of nitrous. Just add your fuel pump and tune the thing.

BTW, a 200 shot of nitrous will generally make that to the tires, +/-2%.

 

If you wanna try it NA go for it i belive it can be done despite what everyone says. I ran 15.2 with only intake and exhaust in my NA. I don't see any reason why a street port and ecu upgrade with some more fuel and yno tuning couldn't run a 13 . Since i ran my 15.2 i've done a few more little things and am pretty confident i will run a 14 next time at the track with a stock port NA
Bur beware that the stock NA tranny and axles really don't like the amount of power it takes to run even as fast as i do, I break axles and my tranny feels weaker everyday

 

Ok, first. Yes u can make a streetable n/a w/ 250-270hp. Its all a matter of one thing. $$$$$.

 

half bridge + fun exhaust + custom intake and exhaust manifolds + fuel + good rebuild +standalone +.....

 

True, but without strengthening the rear end, I doubt it would last long.

-Joe

 

n/a:
bridge port
FE rotors milled for 2mm seals, or competition lightened rotors
84-85 e-shaft, or competition/lightened
hardened fd stat. gears
ianetti ceramic apex seals
fd oil pressure regulator
fd front cover
48 ida webber style intake & TWM throttle body
TII rotor & side housings
programmable ECU
TII drive train

am I missing anything besides the winning lotto ticket?

oh, and I'm not sure how much hp this would net, but through several discussions, I've learned that this would be a bad *** n/a engine.

 

If you want to run low 13s, don't use an n/a RX-7. Thats not what they are good at. On the otherhand if you wanted to build a cheap autocross car, I would say go for it.

If you want to run low 13s or better in an RX-7, buy a turbo model.

 

thanks for all the input guys, and girls if any. im probly justgonna stick with my original plan. cuz i do have a good credit card. but i do have to pay it all back. probly get a street ported 13b rebuilt, with all the boltons i can find, full exhaust, make an intake, and like a 75 shot or sumthin, where im from, i would dominate everyone in like 3 counties. i live in the boonies where the fastest car is a 92-95 4door civic with an LS in it. so i should be fine and dandy.
so what guesstimates would i run with my basic lil setup. and id also have a graby clutch and lightened flywheel.