Quick ? on Split T3 Turbines
12-11-2007, 04:12 PM
#1
Quick ? on Split T3 Turbines
AKA Twin Scroll????
Those turbine housings with the split in the middle of the hole.
While shopping around at a local speed shop, I overheard the sales guy tell this cat who had a turbo with a split T3 turbine, sales man mentioned to the guy that he should reconcider that housing. Basically the point that he was trying to make was that a twin-scroll turbine husing is meant to run on a manifold designed to flow equal amounts into both holes. That it would still work, but it would not be optimal flow to have, say a custom feedpipe into a T3 flange and have that split there. That the split would create alot of turbulance and might cause ~20whp.
The theory behind what he was trying to say makes sense to me, but I know there's got to be a few here with a turbine with that split at the inlet.
What do you do with it (if anything at all)?
Is there some sort of flange that will have an edge on the split side to "cut" the air before going into the turbine?
Do you go downtown with a grinder and smooth it out at the turbine housing itself?
Any input strongly appreciated
Those turbine housings with the split in the middle of the hole.
While shopping around at a local speed shop, I overheard the sales guy tell this cat who had a turbo with a split T3 turbine, sales man mentioned to the guy that he should reconcider that housing. Basically the point that he was trying to make was that a twin-scroll turbine husing is meant to run on a manifold designed to flow equal amounts into both holes. That it would still work, but it would not be optimal flow to have, say a custom feedpipe into a T3 flange and have that split there. That the split would create alot of turbulance and might cause ~20whp.
The theory behind what he was trying to say makes sense to me, but I know there's got to be a few here with a turbine with that split at the inlet.
What do you do with it (if anything at all)?
Is there some sort of flange that will have an edge on the split side to "cut" the air before going into the turbine?
Do you go downtown with a grinder and smooth it out at the turbine housing itself?
Any input strongly appreciated
Last edited by 95BLKMAX; 12-11-2007 at 04:30 PM.
12-11-2007, 04:49 PM
#3
In this fashion...
12-11-2007, 05:34 PM
#5
lol, now you see the worry I have in my head? (woops, I mean, the head of the guy that walked into the store with the turbo while I was there ).
Maybe 95turbogxe will shime in, since this is the type of turbine housing found on HX35s
). Maybe 95turbogxe will shime in, since this is the type of turbine housing found on HX35s
12-11-2007, 08:56 PM
#6
i would grind it down the guy at the speed shop was correct just for splitting the gasses into the turbine evenly, good for twin manifild or a Inline 4-2 manifold
, straight 4-1 = hp loss but not much,
just grind it down. i think that you can buy the flange on ebay but would be pretty pennies like 20+ dlls
22.00 shipped
http://cgi.ebay.com/ebaymotors/T4-T-...spagenameZWDVW
, straight 4-1 = hp loss but not much,
just grind it down. i think that you can buy the flange on ebay but would be pretty pennies like 20+ dlls
22.00 shipped
http://cgi.ebay.com/ebaymotors/T4-T-...spagenameZWDVW
Last edited by Big_E-Dog; 12-11-2007 at 09:04 PM.
12-11-2007, 10:00 PM
#7
bah, i wouldn't worry about it. in fact i didn't worry about it and i will continue to not worry about it. i think that 20hp estimate is gross overkill. even if by some chance it did have that large of an effect, which it won't, what's 20hp? add another pound of boost and make your 20hp back. most turbos being used out there have more than enough capability to break your trans every time you floor it if you really want to, so complaining about a 20hp loss on a maxima is pointless. you aren't going to be maxing the turbo out anyways. some of the fastest maximas on this board are using split housings without doing anything special to compensate.
12-11-2007, 10:29 PM
#8
, thats the same thing I was thinking. Its not as if Im maxing out the turbo to the point where that split may make SUCH a difference as what he was saying. However, I do want to help to make that as smooth of a split into the turbine as possible. Im going to grind the split ON THE FLANGE [not the turbine, in case in the future I want to upgrade and sell this device] into a rounder or if possible sharp-edge face to more easily "slice" the stream of air going into it. Its not as if its going to harm anything, so really I have nothing to loose on doing this, and MAYBE something to gain.
I guess I'll be doing it just for my own peace of mind.
12-11-2007, 10:38 PM
#10
Pretty much what neal said. The twin scroll turbine housings can definately be of use on a smaller motor trying to spool a large turbo(ie 1.8 honda spooling a gt42r). I run a divided housing with a undivided flange and it works just fine.
12-14-2007, 08:12 AM
#11
I ran un divided flages with the hw35 with no problems but now Iv bought a divided flange and going to the divided it all the way to the turbo for the pulse set up! Sr20 pulse set ups make over 50 more horsepower and come on about 500-1000rpms sooner with the same turbo and boost setting
Thread
Thread Starter
Forum
Replies
Last Post
Serotta33
7th Generation Maxima (2009-2015)
4
09-17-2015 12:14 PM