in a stock s5 (89-91 right?) what is the redline? what limits it ? in a rotary i know there are no valves so the only limit is fuel delivery correct? according to the tach looks like redline is like 7k but some say redline is 7k others say 8k.

i am new to the rotary scene and i have allways loved the second gen 7's and just now have what i thought to be enough money to but one but i cant find one for sale!!!! I want to know as muc as i can about this car to see if it is what i really want

Also how would an s5 compare to a 00' 190hp stock v6 mustang i know they weigh like 450lbs more. my friend has one and he says my seven will be slow with 160hp.

stock redline for S5 NA manual is 8K. I've yet to find a rev limiter in these cars.

a stock s5 with exhaust will beat the v6 mustang and then if you get a turbo second gen, it will murder it. Not to mention if you just just get exhaust.



you will like a 7 so much more than a powerless v6 stang

i had no intentions of geting a stang but i just wanted a comparison between the two

there are mechnical limitations on how high the 13b can rev, and they are far more expensive and involved to improve than the fuel system, thats actually a pretty minor piece of the puzzle.



apex seal float, eccentric shaft flex, and stationary gear stress all become issues when trying to rev beyond 8500RPM.



so I'd say on your stock internals 8500 RPM is the 'safe' limit. even then, on a stock motor, you're probably not doing much good @ 8500 anyways so it's not worth the additional stress. if you port the engine though, it's possible to shift the power band into that rpm range.





BTW, a stock NA 7 is by no means fast... it's pretty nimble but not fast. With weight reductions and a handful of money thrown at intake/exhaust/fuel tuning it can be turned into a fast car though.



if you're looking for fast get a TurboII, unless you're interested in the experience of working on the car and have the money to go that route, an NA can be quite a bit more reliable than the TurboII while still being fast, with the proper mods (and funds).

yeah, by 8000 rpm the power is dropping off already, taking it higher is pointless.

The v6 stangs are really slow. They are terrible. My friend has beaten a v6 stang in his ford ranger.

N/A rx-7's are pretty quick, but yeah, not fast. I think my car is pretty peppy and is a lot of fun, and it handles great.

A TII with minor mods will beat a lot of cars. You could keep up with an FD (93+ RX-7) with exhaust, intake, and some fuel tuning.

i was going to say...my heavy vert has handed a few beatdowns on v6 camaros and mustangs. A coupe will have no problem with pullin on one

The +1k redline on the S5s is due to their lighter rotating assembly. Everyone covered the other points well.

it seems odd but it takes about 1.5 piston hp to equal 1 rotary hp..something to do with rotary firing every 1/3 rotation compared to a piston engine firing on every 4th

on the subject of redline. After breaking my motor in properly.. and finally getting it tuned the way i would like it to run. I can consistantly hit my fuel cut Rpm. 8400. My car doesnt have much done to the engine internally, other than 3rd gen seals and springs. obviously stronger and better seals than the FC Stock seals





Taking my engine that high is point less. you figure right now. without headers the power drop off is right after 7000. So i figure when i hear the BUZZZZZZZZ up-shift.





I've seen rotary's at the track revving to well over 14000 but not with major internal mods, Hardend Stationary gears, lighter rotors ect. also the only reason they rev that high is because the mods they have done to their engine (Bridge port/periphial port) allow the powerband to be moved up to those Rpms.