I searched but nothing like that comes up.

Question is same as title.

anybody have a S5 NA with Turbo Housing BUT not porting it (leave it as is)

Most of us know why we prefer Turbo Housing vs NA housing (that stupid wing/diffuser for noise suppression ... )

I know a lot of people Street Port their Turbo housing. but never seen anybody just "leave it as is"

Just kind of curious

thx

 

Both the NA and turbo housings are the same. The only real difference are the coolant passages to the LIM and the exhaust sleeves (which can be swapped). There isn't much of advantage in using turbo housings in an NA application.

 

I think he's wondering how much of a difference there is just from removing the diffuser alone

 

I've been running this set up for about 5 years. I was having the engine rebuilt and ported on the inlet and it was suggested to me to use the turbo housings instead of attempting to port the exhaust ports.I wanted to use new housings and the cost difference was minimal like 80$ each. I'm using the high compression rotors and Racing beat headers into a high flow cat con. I find it noisy and raspy sounding (on OEM replacement mufflers) and looking to smooth things out sound-wise with a different muffler set-up. Just to busy to do it.

 

yep


thx

 

If you didn't get the jist of it from Aaron's post, the housings are the same down there. If you're talking about the diffuser that sits inside the exhaust port hole - the one that's nearly impossible to get out, JUST removing that won't do much.
From experience, you really won't see any gain without a free-flowing exhaust. Remember you're essentially porting the exhaust - making a big hole out of a small hole. Just like porting the intake, you won't get substantially more power without a host of other modifications. On an otherwise stock or "stock with bolt ons" car, expect a few hp. For the 7 minutes it takes to take it out, I would do it. Just look up how to do it right before you go cutting on things.

 

on a rotary, i think it goes like this.. turbo'd, fast, and not super loud... pick 2.
if you want it fast, and not super loud, turbo it.
if you dont want to turbo it and don't want it super load, it's not gonna be fast(relativity)
if you don't want to turbo it, and you want it to be fast, its gonna be super loud.

This pretty much covers any kinda of port job you can do, as with n/a bridges and PP's only respond to free flowing exhaust. do some you tube searchs on bridge and pp N/a dyno's, show me a quite on with more then 250rwhp. do it.

 

well, to be honest I probably gonna have someone to port the engine for me.

why not do it myself? cuz Im gonna buy brand new housing and Im too afraid that I might f-it-up

but I was thinking has anybody ever tried using Turbo housing on NA engine. thats all.