92fordcummins
New member
Ya because the small s400 turbine is 74/83.
Trying to get the Scoop on a S366
- Thread starter joelc79
- Start date
Ya because the small s400 turbine is 74/83.
Thats the 66 I ran, I liked it with the .91, but I then swapped a 14cm ED gated housing on it and the thing ran great.
joelc79
New member
what was noticable difference
Scooter's Roofing
New member
it spooled up a lot quicker
It should spool up faster no doubt. Smaller turbine, or going with the T3 helps spool alot.
T3's are great for a street truck that is not trying to make big power. If you are trying to make big power, time to hang up the T3....yes it will work, and yes it will have high drive pressure and eat thrust bearings. We rebuild S300's ALL the time with the same failure. Now the new Ball bearing S300 we are working on will solve that issue. The ball bearings themselves will take the load vs the brass bearing. Much stronger thrust load capability ~200times more and ~15% quicker spool through the shaft acceleration range.
2007 5.9
West Coast Dyno Modifier
Not entirely...my S366 is a 66/94 83/74...and it's S300 based.
Scooter's Roofing
New member
where is your power cutoff for the reliability of the T3? 600ish?
2007 5.9
West Coast Dyno Modifier
I've driven a stock turbo, Super Phat Shaft 62, BD Super B Special, GT 4094R, and now this BW S366...I can say with confidence that this BW turbo is by far the fastest spooling, lowest temps, and all around best driving turbo of them ALL!!!
To be fair all of the above besides the Garrett were T-3 gated. The Garrett and the BW were T-4 non gated.
To be fair all of the above besides the Garrett were T-3 gated. The Garrett and the BW were T-4 non gated.
600-650 max......drive pressure starts to climb exponentially after that.
That sounds about right, since the GT40 turbine is a bit smallish..... and T4 non-gated is by far the way to go.
Scooter's Roofing
New member
that's kinda what I was thinking... you'll benefit at 550ish, but you'll give up some spool-up... 600ish you're kinda at that tipping point, and 650+, you're in T4 country
NickTF
Single turbo turd.
Going from my previous ED 62race cover/68 13ss with gates welded shut (press fit plugs) to this FI 64standard cover/71 with .91 non gated t4 divided housing has netted another 10psi boost or so! Truck feels like it pulls way harder as well. Definitely lost some spool (~300rpm) but feel the added power is worth it.
Randall12v
...
What about in the situation of a S300 T3 being in a set of compounds? Would going to a T4 non gated turbo with external gate be a better route? Say for 800-1000hp..
op: Granted spool should be affected...would there be any other gains besides flow? Will the ball bearing S3 be T3 or T4?
DieselheaD
New member
why would you plug the wastegate holes with a 68 turbine??
NickTF
Single turbo turd.
Because the pucks didn't seal 100% and it cost spool, more so than I'd like with a 68mm turbine given the idea behind that turbine is good spool with decent top end.
Scooter's Roofing
New member
I think I would have sold the stainless housing and put a cheap non-gated housing on it
NickTF
Single turbo turd.
I think I would have sold the stainless housing and put a cheap non-gated housing on it
But then I wouldn't have been able to sold the turbo as easily without the marketable 13ss housing spec attached to it
DieselheaD
New member
Scooter's Roofing
New member
on a 12v with an automatic, I'm going to disagree