willizm

iTrader: (10)

PT7675 is a potent turbo for it's size. On 10psi I've ran a best of 10.4@134mph with a crap 1.6 60'. Next time out i'm shooting for 9's on 17-20psi. Car made 735whp and 920wtq through an unlocked converter/4l80e so they will make great power and spool damn near instantly on my 346ci motor. I can't run a bigger sized turbo do to space constraints so I'll push the little Precision as far as it will take me.

Jshawzy

Well... I'm leaning towards the s475, do I get the t6 1.1 ar? Or t4 with 1.1? I'd like to keep a fast spool

kylemm1002

iTrader: (6)

I'm in the same boat, debating the se two turbos lol.
My problem is I'm keeping ac and the s475 I know is bigger. Does anyone have any pics of either turbo?

mrstepheneades

Lots of pics of the s475 in my thread.

Here.
https://ls1tech.com/forums/showthrea...9#post17057599

mrstepheneades

T6, 1.32ar, 96mm turbine

Blackpanther99

iTrader: (8)

Follow this guys thread^ Very nice thread to follow

Anyhow the PT7675 is also a awesome choice. Just gotta love the price on the BW. Id go with a T6.

mrstepheneades

Thanks for the compliment.

pwrtrip75

iTrader: (8)

What do people actually mean and what basis of comparison do they have when they say a turbo spools "pretty quick"?

The PT76GTS (Same as PT7576) spooled like a diesel on my 6.0L, it was instant. Now the same turbo on a 5.3 people have told me my car spools pretty fast and i look at them like they are nuts... its slow as hell compared to when it was on the 6.0L.

People have told me their 15 second honduh is "pretty quick".

73turbo53

S475 t6 2" hotside

stock48

iTrader: (17)

I ran a S475/83 on my nova for a short bit and it went 8.90/157.7mph @3300 lbs having to peddle car a few times due to jet fuel sprayed all over the track. I think I could go ~8.6 @158~159 mph if I tried again.

Ryans99ls1

iTrader: (16)

Absolutely no complaints about my Precision 7675GTS-H. Its a cast wheel, ported housing and makes awesome power. You can get it to spool as quick as you want with the tune. Clearly people are happy with both, if you are size limited, the Precision is the way to go.

Jshawzy

Awesome! Thanks guy I'm ordering the s475 t6 83 mm today

kylemm1002

iTrader: (6)

I just off the phone with forced Inductions and he said they have their own version of a pt7675 out that has a larger billet wheel t4 divided flange. Also said its out down 1000rwp already. It's not listed on their site but you might think about that as well. It will light quick and won't choke up top.

stock48

iTrader: (17)

That's prob the BW billet S476/92. That turbo will outpower the pt76/75 if you have the room. A plain cast 75, or 76/92 will also get down.

Sarg

iTrader: (6)

Heck I was talking with Liljohn and he said that they had a 92mm turbine powering a Billet 80+mm compressor and doing very well with it. Lightning fast spool and making some steam up top too. Supposedly that 92mm turbine wheel (same one I have in my cast s480) is a great design. This is the only turbo I have run on my 5.3 so I have nothing to compare it to.

S13LSx

i have this setup and i just went 8.76@156 with a ebay a2a with 151* iat at the traps. trapped 127 in the 1/8th and only back halfed 29mph because of heat soak, ls1 intake, no gear, and out of rpm

mrstepheneades

How much boost you getting out of the turbo? What cubes?