Lsx Rubi

Its going into a heavy 4x4 with 37 inch tires, so low end torque and response is priority, also the space under hood is a little limited . It's a gen 4 4.8 , so I don't have cubes to help spool either . I plan to make 500 hp max, I could care less if it runs out of steam at 5000rpm, its going to spend most of its time around 1000rpm- 3500rpm. It would be awesome if I can get spool and response characteristics like a ferd 3.5 ecobewst. Any suggestions are appreciated .

gametech

iTrader: (1)

Something like an old 60mm Garrett would fit the bill nicely, but there are probably even better newer designs. BTW, this is a terrible forum for asking about quick spooling torque monsters. The average response will probably involve a Borg turbo that will be half the size of your motor, along with recommendations for a 5500rpm stall converter. Quick spooling around here seems to be starting to spool at 3000rpm.

svslow

Borg S366

lemming104

Garrett GT3582R, perhaps, assuming the 4.8L is basically stock in terms of airflow characteristics? If I'm reading the compressor map correctly, it'll just barely avoid falling into choke up top at ~1 bar boost. I used one on a 4.2L Ford V6 for several years and was pretty happy with it.

topbrent

iTrader: (1)

You might check out this similar 4.8 / s366 build. https://www.performancetrucks.net/fo...-8-van-539084/

If it were me, I would install a cam suited for low rpm torque production in a 4.8l. @stock48 should be one of the first people to contact about this. Stock48 facebook contact

Lsx Rubi

Lol I did notice that . I hate high stall converters don't like the rubberband effect and the disconnect between the engine and trans . It's going to be a stock stall 4l80e . Be happy if I can see positive manifold pressure around 1800-2000 rpm as that will be me my cruise rpms . Lots of mountains here and elevation change so it would be nice to go up grades in overdrive and not have trans shifting all the time .

Forcefed86

iTrader: (4)

Another vote for the S366... Good build showing what they are capable of. (on a bigger motor to boot)

https://www.theturboforums.com/threa...54-wtq.384933/

JoeNova

T4 GT3582. Billet wheel and anti-surge compressor housing. You can get one for 400-500 bucks.
Will make 500 on a 4.8 and tons of torque.

Lsx Rubi

Seems like something I would be interested in , it's a tad on the small side. Also it's a little out of my budget would like to keep it around $1200 . Airflow wise I might throw in a baby cam 205/210 113 lsa .550 lift something along those lines .

slowride

iTrader: (3)

What are you looking to spend? A borg s360/363 cast wheel would be fine. Even some of the smaller 65mm turbine ebay turbos would be fine. You don't need much for the cubes and power you're after.

Lsx Rubi

I have been looking at the s366 , its a good option , I have a lq4 with t4 S475 that spools up pretty good around 2000rpms I start seeing boost. The price is pretty decent as well , do the 68mm turbine wheel with .88 A/r . The only thing I don't like is that its physical size is big but I guess that's why they are reliable , they are built like tanks.

truckdoug

iTrader: (25)

if you need small physically, the china 7875's can fit just about anywhere.

slowride

iTrader: (3)

Friend is selling these https://www.ebay.com/itm/Precision-7...EAAOSwdc5bYL-A, but might be a bit more turbo than you need. I'd run the .81 housing for what you want.

Lsx Rubi

I'm trying to stay away from china turbos , want the rig to be reliable as I'll taking it remote areas and trails

stevieturbo

S366 would be good.

or at a little more money, maybe a 362SXE sort of thing.

Even stepping up to the larger 73mm turbine probably wouldnt hurt anything at all, and may well work better by allowing the engine to breathe a bit better rather than choking it.

JoeNova

Then Borg Warner is your only safe bet.
Precision turbos seem to come apart if used for anything more than quarter mile passes.

Lsx Rubi

Would a s362 with a .83 A/R be too small?

Forcefed86

iTrader: (4)

Not any smaller physically and costs more...Why would you go that route? S366 is the way to go.

ls3fox

stevieturbo

The earlier 362FMW is slightly smaller than the regular 366. Not much though.

But I'd still prefer the larger turbine side of the 366.

Or these cover both in the SXE range. The 363 with the billet wheel should outperform the regular cast 366 in all areas, airflow and spool because of the lighter wheel

https://agpturbo.com/borg-warner-s36...3-13009097047/

https://agpturbo.com/borg-warner-s36...3-13009097049/

But on price, the regular 366 would be hard to beat.