which one is better the s4 turbo or s5 turbo? what are the differecnes??

 

Go read...

http://www.fc3spro.com/

And define better as in what terms.

S4 - lighter, less horsepower
S5 - heavier, more horpsepower

After that people will debate if the plastic in one is better or worse... shrug.

 

obviously the s5, things tend to get better through progression, and the s5 tII makes around 30-40 more hp. s4 also had the twin scroll (86 and 87 iirc), which had its benefits, and a divided manifold. s5 had neither and the ports flowed more efficiently due to sizing i believe.

 

Also the wastegate on the S5 turbo is superior to the S4 unit. FC3Spro.com will have all of the answers you need.

 

the 88 is considered s4 correct???

 

Yep, 86-88 is S4 89-91 is S5.

 

86 - 88 is S4, 89 - 91 is S5

*edit* guess we posted that at the same time hah! and almost the exact same thing.

 

dude lets put it this way one engine is like a brick, the other is like a cinder block.

they can both break windows just one does it a little better than the other

 

Zenki FC turbo 13BT = 182hp
Kouki FC turbo 13BT = 200hp
Difference is only 18hp.
Stop posting bad info...


-Ted

 

Its not all the turbo for that 18 hp. The intake is longer so its got more velocity before it hits the combustion chamber.

 

they have the same wheellllllllllllllllll

 

Do you mean the physical turbo or are you talking about the whole car?

read this for differences in engine and turbo: http://fc3spro.com/TECH/FAQ/ZVK/zvk.html

 

my bad.... after calc. homework, the easy math is what i mess up on....

 

the turbos are the same for compressor and cartridge.

The hotside os the only difference.

S5 is better because it has a larger wastegate.

 

Can you just swap a S5 turbo onto an S4 engine?

 

...the extra hp is mostly the compression in the engine, not the turbo. Also, Im gonna be a technical ****** and point out that the S4 turbo is 87-88, not 86-88

 

Yes,
You need the turbo and the exhaust manifold.

Keep your years oil return line.

The oil feed/water lines are universal

 

they have rx7 turbos in japan in 86
they also dont have na there at all
so the 86-88 is correct.

 

s4/t3 s5/t4

 

well ok thats true. Its market dependant then. US incorrect, Japan correct cause like you said all are turbo

 

Bullshit

 

Considering they're the same wheel.... umm.... wrong.

 

Considering that wheels have nothing to do with foot-prints...

 

holly god, this thread is a f-ing mess. Just figured I'd add to the mess with this usless post.

 

so would i be better off just converting a s5 back to a s4??? or does it not really matter???