What's the difference between the s4 and s5 turbos if any?



Thanks



Robert Maier

 

There is a dif in the turbo, but I dont remember the exact terminology as to what...the s5 manifolds use a twin scroll design though, which the s4s don't. The s5 turbo & manifold is an upgrade from the s4, so if you have one laying around, you could swap it....

 

the 89 has a larger wastegate, and a better exhaust manifold design



mike

 

If i were to run about 10 psi would i need to port the wastegate? How much pressure can the s5 turbo make with the ported wastegate efficiently?



Thanks again

 

Isn't that backwards, s4= twin scroll?

 

yes if you run 10psi you should port the wg, i think it can control like 8 psi w/o being ported.

 

Honestly, I can't remember...I THOUGHT s5s were twin scroll...could be wrong, either way...the s5 is better,lol.

 

S4 has the twin scroll.

 

Thank u :bigok:

 

dual wg ports also! s5 is better in everyway!