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-   -   S4 S5 (https://www.nopistons.com/2nd-generation-specific-17/s4-s5-31772/)

Apex13B 01-13-2004 08:40 PM

wtf i couldnt edit that



The cooling system is larger and better working in the S5 car too

plastic water neck (i'm making alloy ones and taking orders now lol)

s5 = win

mike86 01-13-2004 10:32 PM


Originally Posted by FCmaniac' date='Jan 13 2004, 04:00 PM
S4 NA = 146 bhp

S4 T2 = 182 bhp

S5 NA = 160 bhp

S5 T2 = 200 bhp



Those are the stock ratings from Mazda. Higher compression, lighter rotors and a different intake manifold design along with a different auxillary 5/6 port actuation are the main reasons for the NA power increase. The T2's I believe had a different compression ratio too and a bit more boost for the power increase.



Like Phins said, some electrical changes in engine from S4 to S5 were from mechanical to electric oil metering pump (this is what lubricates the inside of our engines), different throttle position sensor (I think dual position instead of the single plunger TPS from S4) and mass air flow sensor went from the flapper door type to whatever the S5 is... I cant remember anything else.

what's the difference between bhp,hp,DIN and Kw & SAE power ratings? https://www.nopistons.com/forums/pub...1047683561.gif



My S4 certainly seems like more than 146 bhp....

Dramon_Killer 01-14-2004 01:18 AM

It's because you don't have a turbo. All my n/a friends say that then i give them a ride in my car.

FCmaniac 01-14-2004 06:56 AM

I meant base horsepower. Most stock NA's now would put out 100-115 at the wheels. That's pretty weak by today's standards for a 2600-2700 lb car. I guess it feels like more. Maybe back in 1986, it was considered quick. Anyway, the faster you go, the slower you feel. It just takes time to get used to it.

RONIN FC 01-14-2004 07:32 AM


Originally Posted by FCmaniac' date='Jan 14 2004, 04:56 AM
I meant base horsepower. Most stock NA's now would put out 100-115 at the wheels. That's pretty weak by today's standards for a 2600-2700 lb car. I guess it feels like more. Maybe back in 1986, it was considered quick. Anyway, the faster you go, the slower you feel. It just takes time to get used to it.

The gearing plays a role in the performance.

rmaiersg 01-14-2004 12:36 PM

bhp = brake horse power (the dyno puts a brake on the engine to see how strong it is)



hp = horse power just another way of saying it (i think)



SAE = is horse power (torque x rpm/some number like 5252 i believe)

kW = kilowatts (kilojoules/second)



different measurements (basically like american and metric)



both are force delivered over time in a way

mike86 01-14-2004 05:00 PM

Well after driving a what-I-thought-was-quick Celica,the FC absolutely blows the doors off it. Plus,my FC also has a custom exhaust system,but still uses the factory header and cats,so maybe that's why it feels a little peppier?

FCmaniac 01-14-2004 05:17 PM

Don't get me wrong Mike, I'm not trashing our NA's at all. They do feel peppy and they're great cars. All I am saying is that the faster you go or the more used to it you get, you start to think its no big deal and you just want to go faster and faster.

CGeek2k 01-14-2004 06:32 PM

Yeah, after driving for a hour or two on the interstate, its almost impossible to stay under 40 when I get in town.

FCmaniac 01-14-2004 06:59 PM

lol, forget it.. I'm not saying drive like an *******



I'm saying its like going from driving an FD everyday to a Hyundai Accent or vice versa. You get used to whatever you're in.


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