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s4 turbo vs s5 turbo

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Old 04-12-07, 09:33 PM
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s4 turbo vs s5 turbo

which one is better the s4 turbo or s5 turbo? what are the differecnes??
Old 04-12-07, 09:36 PM
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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.
Old 04-12-07, 09:41 PM
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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.
Old 04-12-07, 09:53 PM
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Also the wastegate on the S5 turbo is superior to the S4 unit. FC3Spro.com will have all of the answers you need.
Old 04-12-07, 10:11 PM
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the 88 is considered s4 correct???
Old 04-12-07, 10:14 PM
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Yep, 86-88 is S4 89-91 is S5.
Old 04-12-07, 10:14 PM
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86 - 88 is S4, 89 - 91 is S5

*edit* guess we posted that at the same time hah! and almost the exact same thing.
Old 04-12-07, 10:18 PM
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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
Old 04-12-07, 10:28 PM
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Originally Posted by dean23
and the s5 tII makes around 30-40 more hp.
Zenki FC turbo 13BT = 182hp
Kouki FC turbo 13BT = 200hp
Difference is only 18hp.
Stop posting bad info...


-Ted
Old 04-12-07, 10:46 PM
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Its not all the turbo for that 18 hp. The intake is longer so its got more velocity before it hits the combustion chamber.
Old 04-12-07, 11:43 PM
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they have the same wheellllllllllllllllll
Old 04-13-07, 12:21 AM
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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
Old 04-13-07, 04:29 PM
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Originally Posted by RETed
Zenki FC turbo 13BT = 182hp
Kouki FC turbo 13BT = 200hp
Difference is only 18hp.
Stop posting bad info...
my bad.... after calc. homework, the easy math is what i mess up on....
Old 04-13-07, 05:02 PM
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the turbos are the same for compressor and cartridge.

The hotside os the only difference.

S5 is better because it has a larger wastegate.
Old 04-13-07, 05:09 PM
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Can you just swap a S5 turbo onto an S4 engine?
Old 04-13-07, 05:11 PM
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...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
Old 04-13-07, 06:05 PM
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Originally Posted by Ishibubu
Can you just swap a S5 turbo onto an S4 engine?
Yes,
You need the turbo and the exhaust manifold.

Keep your years oil return line.

The oil feed/water lines are universal
Old 04-13-07, 07:50 PM
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Originally Posted by FCKing1995
...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

they have rx7 turbos in japan in 86
they also dont have na there at all
so the 86-88 is correct.
Old 04-13-07, 08:05 PM
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s4/t3 s5/t4
Old 04-13-07, 08:05 PM
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Originally Posted by slpin
they have rx7 turbos in japan in 86
they also dont have na there at all
so the 86-88 is correct.
well ok thats true. Its market dependant then. US incorrect, Japan correct cause like you said all are turbo
Old 04-13-07, 08:36 PM
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Originally Posted by k1ng pr1ck
s4/t3 s5/t4
Bullshit
Old 04-13-07, 08:41 PM
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Originally Posted by k1ng pr1ck
s4/t3 s5/t4
Considering they're the same wheel.... umm.... wrong.
Old 04-13-07, 09:11 PM
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Originally Posted by pr0digy
Considering they're the same wheel.... umm.... wrong.
Considering that wheels have nothing to do with foot-prints...
Old 04-13-07, 09:17 PM
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holly god, this thread is a f-ing mess. Just figured I'd add to the mess with this usless post.
Old 04-13-07, 10:56 PM
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so would i be better off just converting a s5 back to a s4??? or does it not really matter???


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