Another T4 thread

lincolnlocker · Dec 29, 2016

a 38r ratio is still 1 to 1 until you hold it wot for a period of time.. especially at anything below 30psi.. so again.. why is it running 15psi at that low of an rpm if it isn't working harder? I might be dumb when it comes to this type of stuff but that is how I have been taught over the years.. this changes and goes against everything I have learned or have been taught.

live life full throttle

god bless america and the farmer who feeds your fat ass

mikeeg02 · Dec 29, 2016

Don't misunderstand that situation. When I made 15psi at 1500, that was loaded to 24k, intentionally lugging the f!ck out of it up a long grade and keeping into it to see what it was capable of cleaning up. The same situation with my old turbo would have yielded a sh!t ton of smoke. And most likely deceleration.

Empty at 1500 in OD it may be making 1 psi, at 400* on the flat.

And as I said before. I'm not suggesting going out and doing that all the time. But it gives you a great visual understanding of how fast it can come up, stay cool, and keep the smoke away.

lincolnlocker · Dec 29, 2016

mikeeg02 said:
Don't misunderstand that situation. When I made 15psi at 1500, that was loaded to 24k, intentionally lugging the f!ck out of it up a long grade and keeping into it to see what it was capable of cleaning up. The same situation with my old turbo would have yielded a sh!t ton of smoke. And most likely deceleration.

Empty at 1500 in OD it may be making 1 psi, at 400* on the flat.

And as I said before. I'm not suggesting going out and doing that all the time. But it gives you a great visual understanding of how fast it can come up, stay cool, and keep the smoke away.

ok, that makes more sense..

live life full throttle

god bless america and the farmer who feeds your fat ass

Z_racing14 · Dec 29, 2016

Not really sure how anyone can't wrap their head around 15psi at 1500rpm being a good thing. Not that you should tow at 1500 but it proves the turbo can move some air (enough to clean the fuel up) at lower rpms and get things spooling and rpm climbing without looking like a 15 year old kid with a smoke tune. I love how my truck doesnt dump black at low rpm anymore like the R did. Also no crazy egt's accompanied by no power for climbing hills loaded at sub 2k rpms.

The Brad · Feb 9, 2017

I forgot to post this sooner. Here's a vid grossing about 16k, 4% grade, pretty decent head winds, accelerating in overdrive. The EGTs didn't break 1200 and boost hit 32psi in my tow tune. I was rolling into it slowly so it would downshift. First is a shot of the gauges, then I slowed down and did it again showing that there was zero smoke. Also running 35s and 3.73s

https://youtu.be/r_6V4NGfi98

TyCorr · Feb 12, 2017

Dies that truck have a miss or a dead cylinder?

Sounds like its missing.

The Brad · Feb 12, 2017

Not according to CCT and Perdel tests on AE. Number 7 was dead until I replaced that injector 2 years ago.

Swaan · Feb 12, 2017

TyCorr said:
Dies that truck have a miss or a dead cylinder?

Sounds like its missing.

Sounds fine to me.
Got that typical v8 thump. Just like a 3408,3208 cat or e9 mack. They all sound like they are missing under a hard pull.

TyCorr · Feb 12, 2017

Yea, i have one and have had a few others. It sounds a bit off to me. Could be the audio but if the audio isnt corrupt a cylinder isnt keeping constant exhaust pulse. Just like when you start em and a weaker hole will make it skip and then pull back down.

lincolnlocker · Feb 16, 2017

TyCorr said:
Yea, i have one and have had a few others. It sounds a bit off to me. Could be the audio but if the audio isnt corrupt a cylinder isnt keeping constant exhaust pulse. Just like when you start em and a weaker hole will make it skip and then pull back down.

does sound like it has a shutter to me.. but I think the audio sucks anyway.

live life full throttle

god bless america and the farmer who feeds your fat ass

Csims77 · Feb 21, 2017

Looking at t4 setup now that my 38r is toasted after 2 years and 20k. Im running swamps 200/30 hybrids. 90% street use, 10% towing. Any help would be appreciated. Looking to purchase asap.

gnxtc2 · Feb 21, 2017

What exactly do you need help with??? Turbo selection? T4 manufacturer?

Billy T.
[email protected]

The Brad · Feb 21, 2017

I couldn't be happier with my 364.5! The sound (way quieter than the 38r), the low rpm spool and over 40psi up top.

Csims77 · Feb 21, 2017

gnxtc2 said:
What exactly do you need help with??? Turbo selection? T4 manufacturer?

Billy T.
[email protected]

Pretty much everything. I've kept up with a number of threads and haven't really found anyone running my injectors with a t4. The 38r is typically what I've seen as a combo. I'd like a quick spool, low egts, etc. I'm open to anything. I won't be drag racing or heavy pulling. Just something in a T4 config that's a fun, street-able for what I've done to the truck already. I found the 38r to be ok to about 2700 rpms before it fell flat. I'm not happy it gave up after only 2 years so I'm not replacing it with another. I do have a PMR engine as well.

Csims77 · Feb 21, 2017

The Brad said:
I couldn't be happier with my 364.5! The sound (way quieter than the 38r), the low rpm spool and over 40psi up top.

I appreciate the info. The 364.5 is the one I see on a recurring basis as a good performer. Just wanted to make sure it'd pair well with mine.

superpsd · Feb 21, 2017

The 364.5 comes in two turbine sizes I see. I assume most are running the larger turbine. Below is the supercore part numbers (turbo without turbine housing)

Part numbers for "364.5"

S300SX-E SuperCore Assembly 8776
64.47mm / 2.54'' Compressor Inducer Dia.
87.37mm / 3.44'' Compressor Wheel O.D.
67.56mm / 2.66'' Turbine Exducer Dia.
76.20mm / 3.00'' Turbine Wheel O.D.
Straight Compressor Outlet

S300SX-E SuperCore Assembly 8780
64.47mm / 2.54'' Compressor Inducer Dia.
87.37mm / 3.44'' Compressor Wheel O.D.
73.37mm / 2.89'' Turbine Exducer Dia.
79.75mm / 3.14'' Turbine Wheel O.D.
Straight Compressor Outlet

Then there is the "366"

S300SX-E SuperCore Assembly 9180
66.11mm / 2.60'' Compressor Inducer Dia.
91.44mm / 3.60'' Compressor Wheel O.D.
73.37mm / 2.89'' Turbine Exducer Dia.
79.75mm / 3.14'' Turbine Wheel O.D.
Straight Compressor Outlet

And the "369"

300SX-E SuperCore Assembly 9180
69.00mm / 2.72'' Compressor Inducer Dia.
91.44mm / 3.60'' Compressor Wheel O.D.
73.37mm / 2.89'' Turbine Exducer Dia.
79.75mm / 3.14'' Turbine Wheel O.D.
Straight Compressor Outlet

The Brad · Feb 21, 2017

Csims77 said:
I appreciate the info. The 364.5 is the one I see on a recurring basis as a good performer. Just wanted to make sure it'd pair well with mine.

Your mods are almost exactly like mine. S&B, FRX, and 35s. Only difference is I have 80% nozzles and the 364 cleans up the fuel. Mikeeg02 on here is running a 366 with the 1.0 housing and a 6 speed and his spools well too.

The Brad · Feb 21, 2017

superpsd said:
The 364.4 comes in two turbine sizes I see. I assume most are running the larger turbine.

Part numbers for "364.4"

S300SX-E SuperCore Assembly 8776
64.47mm / 2.54'' Compressor Inducer Dia.
87.37mm / 3.44'' Compressor Wheel O.D.
67.56mm / 2.66'' Turbine Exducer Dia.
76.20mm / 3.00'' Turbine Wheel O.D.
Straight Compressor Outlet

S300SX-E SuperCore Assembly 8780
64.47mm / 2.54'' Compressor Inducer Dia.
87.37mm / 3.44'' Compressor Wheel O.D.
73.37mm / 2.89'' Turbine Exducer Dia.
79.75mm / 3.14'' Turbine Wheel O.D.
Straight Compressor Outlet

Then there is the "366"

S300SX-E SuperCore Assembly 9180
66.11mm / 2.60'' Compressor Inducer Dia.
91.44mm / 3.60'' Compressor Wheel O.D.
73.37mm / 2.89'' Turbine Exducer Dia.
79.75mm / 3.14'' Turbine Wheel O.D.
Straight Compressor Outlet

And the "369"

300SX-E SuperCore Assembly 9180
69.00mm / 2.72'' Compressor Inducer Dia.
91.44mm / 3.60'' Compressor Wheel O.D.
73.37mm / 2.89'' Turbine Exducer Dia.
79.75mm / 3.14'' Turbine Wheel O.D.
Straight Compressor Outlet

How much work would it be for you to bypass your supercharger to see how the 369 does at lower rpm?

superpsd · Feb 21, 2017

The Brad said:
How much work would it be for you to bypass your supercharger to see how the 369 does at lower rpm?

Not much work. Yank blower, Bolt another alternator on and stock belt. Disconnect the ducting feeding the turbo and install filter. I may play with it. I did notice the 369 is laggier than a stock turbo with a leaking up pipe. That's to be expected jumping from a 60mm turbo to a 69mm turbo. I just had to alter the tuning. I'm willing to bet the difference in performance between the 366sxe and 369sxe is minimal as the only difference is the 3mm larger inducer on the compressor.

gnxtc2 · Feb 21, 2017

Csims77 said:
Pretty much everything. I've kept up with a number of threads and haven't really found anyone running my injectors with a t4. The 38r is typically what I've seen as a combo. I'd like a quick spool, low egts, etc. I'm open to anything. I won't be drag racing or heavy pulling. Just something in a T4 config that's a fun, street-able for what I've done to the truck already. I found the 38r to be ok to about 2700 rpms before it fell flat. I'm not happy it gave up after only 2 years so I'm not replacing it with another. I do have a PMR engine as well.

My T4 kit is from Irate with the BASB turbo (64.5mm). The BASB is pre-SXE line of turbos from Borg Warner. The BASB cleans up my 175/80s, spools down low (1200 rpm) and I have no complaints on either the T4 kit nor the BASB.

Billy T.
[email protected]