Possible? Interchanging S4 TII Housings w. S5 TII Rotors
12-07-08, 07:32 PM
#1
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Possible? Interchanging S4 TII Housings w. S5 TII Rotors
I apologize because I know that this answer is out there I just can't seem to find it through search, so I figured this was the right place......
Anyhow, is it possible to install S5 TII rotors in an S4 TII housing for rebuild? I believe that S5 TII rotors are to produce more hp (15+) since they are lighter through design.
If they are not directly interchangeable, what is required to make the change to install S5 TII rotors in an S4 TII housing. Thank you for pointing me in the right direction.
Josh
Anyhow, is it possible to install S5 TII rotors in an S4 TII housing for rebuild? I believe that S5 TII rotors are to produce more hp (15+) since they are lighter through design.
If they are not directly interchangeable, what is required to make the change to install S5 TII rotors in an S4 TII housing. Thank you for pointing me in the right direction.
Josh
12-07-08, 08:11 PM
#2
Yes, they're interchangeable.
You'll need a set of S5 or FD counterweights to go with them though cause they're a bit lighter than the S4s.
The front counterweight is inside the front cover.
The rear counterweight is a bit different. It's actually built into the stock flywheel. So if you want to keep a stock flywheel, you'll need an S5 flywheel.
If you want to use an aftermarket flywheel you'll need the counterweight from an Auto S5 or FD. They bolt to the flexplate/aftermarket flywheel.
You'll need a set of S5 or FD counterweights to go with them though cause they're a bit lighter than the S4s.
The front counterweight is inside the front cover.
The rear counterweight is a bit different. It's actually built into the stock flywheel. So if you want to keep a stock flywheel, you'll need an S5 flywheel.
If you want to use an aftermarket flywheel you'll need the counterweight from an Auto S5 or FD. They bolt to the flexplate/aftermarket flywheel.
12-11-08, 01:24 PM
#4
S4 and S5 turbo rotors have different compression ratio's as well.
S4 = 8.5, S5=9.0
I don't think it will be an issue except when dyno tuning for power in normal applications.
S5= more potential
S4= more room for tuning experiments/mistakes
How much in each direction? I do not have the experience to say.
S4 = 8.5, S5=9.0
I don't think it will be an issue except when dyno tuning for power in normal applications.
S5= more potential
S4= more room for tuning experiments/mistakes
How much in each direction? I do not have the experience to say.
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