kmags

My question is this: Is 220 whp possible on a street or bridgeported s5 n/a with duals, intake, bigger injectors, fuel pump and whatever I need to get bigger spark? I'm just wondering because it's almost time for me to decide to rebuild the n/a, or go turbo with it. I think I'm leaning towards the turbo. What do you think. Please don't tell me to search...I'm too lazy for that.

DigitalSynthesis

I went turbo. There are good reasons not too, and good reasons to do so.

kmags

Is the turbo swap pretty much plug and play? I mean, is it as easy as putting a B series engine into a civic?

zjbarra

iTrader: (2)

If you do a turbo here is what you'll need to do:
Engine harness and new ECU
Turbo engine block
manifolds (and all emissions if you have to pass it)
you need a turbo
you need to mod the exhaust
you need a turbo tranny
turbo clutch and flywheel
and I think maybe the driveshaft and diff (forgot)

It comes down to what you really want for power. 220 can certainly be done on a S5, NA but it will take time and money. A full exhaust, standalone and a decent port job to the engine and intake should do the trick I would think. If you're going all track, you could just peripheral port it up to the 300's and throw a fatty carb on it :-P

Sideways7

iTrader: (7)

I really want a peripheral port, dangit. Unfortunately its my daily driver, so its not very practical.

Bambam7

You're not gonna get there without haveing a super loud car with no low end torque.
I did my S5 na up all the way I could- street port, 3mm seals, even got the S-AFC, and I ended up with a car that was fast on the strip (14.2 or something.. can't remember now) but had no ***** under 4000, and was LOUD AS HELL. No way around that.
I went turbo, cause I'd had enough of the noise.
My car is probably .5 second faster in the 1/4, but has exponentailly better low-mid power, and pulls like hell on the highway. Quiet too.

kmags

Bambam, that was exactly the response I was looking for. Thank you. You may have just nudged me over the fence towards the turbo.

Bambam7

I wish somebody had told me that before I dumped all the money into my NA, only to hit the ceiling at 200hp. With a turbo, the sky's the limit!!

hpram99

no, your apex seals the limit! j/k j/k

1987RX7guy

iTrader: (3)

220 whp possible on s5 na?


Sure it is. You want to do it for fun or do you want the power? If you want to make a fast N/a because you just like N/a then your going to need atleast 6-10k dollars to get there. If you just want the power and not the individuality of having a nice N/a(loud is relative just like the True Dual exhaust is the loudest thing on the planet ) Go with a TII. For me I am going down both roads. My N/a still has plans and goals. But the TII is the one I will build for power. Then again...I am not going to drive the TII more than two days a week.

Santiago

RotaryRevn

how much power could you yield with a s5 na motor with the TII side plates (4port) streetported? I was kinda thinking of using the n/a motor for an old schooler where power isn't that big of a concern. I just like the nice sound of an n/a ported rotary in an old school rex.

RexRyder

iTrader: (10)

6k for 220whp? whoa that seems like a lot. rebuild/port=2k
true dual=400
intake=60
fuel pump=100
efan, ignition, etc.
and do some **** urself: remove emissions, P/S, A/C, port the manifolds, port tb or buy a mustang TB, port ur afm, etc. im not sure y ppl think a 220hp n/a rx7 would be a bitch to make. a frend of mine got around 20 hp by doing something with the uim.

1987RX7guy

iTrader: (3)

I would think that the side plates don't matter if your going for max power. Maximum power is peripheral port territory. Which most of the time doesn't use the side intake ports anymore.

Sideways7

iTrader: (7)

Im gonna go with bambam: If you want more than 200 hp at the wheels, turbo's the way to. Going much past that in an NA involves money, crappy drivablilty in town, and a rediculously loud exhaust. Turbos offer substantialy more power with comparable mods, and theres more stuff to do to add horespower.

kidcaffeine

i dont know about the rest of you but theres no feeling like beating a fully done(swapped) up civic or intergra with the power of a N/A seven. Usually when someone thinks rx7 they think turbo, then they see someone without one and think this *** is stupid for racing, not knowing theres over 220 hp in that lil sucker, oh and forget racing on a highway, its like stealing candy from a baby with most of those rice burners

kmags

I agree...for some reason the 7 does really well at higher speeds. Mine is kind of a dog 0-60, but after that it really seems to get up and go.

projekt

yes the aerodynamics of a sports car vs. a grandma car play a huge difference on the highway

GlennS

So what is a reasonable RWHP gain on a NA RX-7 where street drivability is still of some importance?? 185, 190, 199.99999??? I am thinking the 185 - 200 HP range in the 1989 - 1991 RX-7 would be a LOT of fun...

By the way, I am very new to the world of RX-7, I had one, but before I could really enjoy it, some idiot ran me off the road and totalled it. For the 3 months I had it though I really liked it!

GlennS

Nghtstlkr7

mines a dog off the line too.. i have an S5 n/a... but on the highway she's a lightfooted runner.... maybe it has something to do with the fact that i have the A/T rearend gears (recent auto-manual swap).

SpeedFreak03

I had one, but before I could really enjoy it, some idiot ran me off the road and totalled it. For the 3 months I had it though I really liked it!


Same here man I had mine for 3 months too and it got wrecked, haha thats crazy!

Rx7Boi

You can hit 200-220whp if you do it right... a very large street port or half bridge... you cant be like the others and go with a pumped n/a motor on the stock ecu and afm thats just plain retarded.. everyone should know the AFM/MAF's cant flow over 170whp.. so if you want a mean n/a do it right and go with a stand-alone ems (or carb).. other wise get a t2

KNONFS

iTrader: (14)

Thank you very much...

I have yet to see a 14 second timeslip from a FC NA (with the stock ECU) on this board, the only reliable source would be "PPBNOS" with a 14.8 @97mph.

I wonder how many of the NA people have tried a carb, or an aftermarket intake manifold, etc

RETed

Almost impossible with the stock ECU and stock AFM still installed...


-Ted

eyecandy

iTrader: (19)

I have a friend that is going to use Tweakit ITB's w/ a microtech ecu... I know some one here has also don this with a stock engine (no porting) and got about 230 hp. But again you loose the low end. But it all depends on what you will be doing with the car, ie racing then their is no problem, daily driver? deal with it!

kidcaffeine

i would love to one day woop a ******* tII, godamn that would make my day, you all take a bunch of smack!!! just because your car sneezes when you shift doesnt make you king of the road, if people with an N/a spent as much mooney as the people with turbos did do install bigger turbos, we could just as easily through a carb in their, We dont spend half as much time maintaing our sevens as people with turbos, we dont need any little timer to tell us when to turn off, We just get up and go. Rotary was meant to be all motor. With the right modifications you can bolt a turbo onto anything. Rotary = All Motor.