transamfreak01

iTrader: (8)

Why am I being told that I can ONLY use a t6 set up for my 408? I've seen a bunch of people on here running 6.0s with t4 set ups putting down 700+rwhp. I've been told by a few companies I will run out of steam by 5000rpms. I'm a nitrous guy but I really wanna pull the trigger and go boost although I don't want to spend 5k on piping and all that good stuff

Kmspeedie

iTrader: (1)

no matter what you need to get piping which wont be 5k, if you havnt bought a kit yet go t6, call HSP they havva nasty kit. if you have a t4? or want to run t4, you can as well, call liljohn/HSP/forced induction to get a t4 turbo sized or built for exactly what you need if you decide to go that routw. theres so many variables but a t4 WILL work

jay_rich

iTrader: (8)

Could you get away with a T4? Yes. Would you be leaving power on the table? Yes.

The back pressure would be pretty high using a T4 turbo. A T4 flange will fit around a 2" pipe onto each side (if divided). Pretty big bottle neck for that many cubes. If you are dead set on a T4 you are gonna end up paying big bucks for a large T4 to come close to fitting your needs.

Why not just look into the Huron Speed V2 T6 kit? Go with an S480+ or something. A box stock S480 is around $900 (T6 1.32a/r) Talk with Lil John or Jose at forcedinductions like Kmspeedie mentioned, they can give you some great info on which direction to go with for turbo's.

You should be able to do it for around $5000. Its the small **** that will nickel and dime ya. But ut if your have a nitrous setup, im sure you already have a capable fuel system for the most part.

Jay

SCott5

iTrader: (40)

The question is why are you so set on a T4?

transamfreak01

iTrader: (8)

I'm not set on anything yet. I was just wondering why I'm getting mixed reviews and figured I would ask the public instead of the seller. I'm just looking at options right now. But thanks guys for the quick responses

SCott5

iTrader: (40)

The T6 setup will be what a motor that size will like. You can use a T4 and any turbo you want and it will work, but you would be leaving so much on the table and Probably end up going to a T6 in the end.

cptinjak

To answer questions like this we really need to know your goals. "will it work?" and "what do I need?" only make sense in context of what you're trying to do with it.

HP goal?
Displacement/rpm?
Fuel type?
Application? (street/strip)

Jack

Razor

A T4 1.25 AR billet 76mm on a 6.0 is running in the 8's on a black Nova...

Forcefed86

iTrader: (4)

For the record thats also a custom unit with a very large exh wheel... It's not a typical T4 wheel turbo.

Superman09

iTrader: (65)

A T6 kit will give you more options, in comparison also cheaper turbo options, and overall will be much more efficient with your larger displacement engine. Larger cubes creates more exhaust. With more exhaust feeding the turbo, you need a more efficient turbine side of the turbo. When it comes to T4 turbos, all standard T4s are limited to a 75mm turbine wheel which will not nearly be efficient enough on that large of an engine causing increased drive pressure, which will result in the set-up's power falling off very early. As other's mentioned, you could get away with a Mid-frame T4 turbo which will fit on our T4 kits, however options are much more limited and they require a larger down pipe due to their larger turbine housing and turbine wheel. When comparing a BW S400 turbo, the same specs in a turbo in terms of wheels will be a couple hundred more in T4 form in comparison to T6 form. You also only have a few mid-frame T4 options to choose from. Making that jump to a T6 frame will leave you many more turbo options, possibly a more affordable turbo in comparison, and overall a set-up that was designed and geared toward the larger cubic inch set-up you have. Our T6 kit was designed exactly for set-ups like yours.... where the engine set-up and goals are just out of reach from a standard T4 kit, and will still leave you room to grow beyond that as well. Rather than optioning out a T4 kit with the Mid-frame and 4" down pipe option, a much better starting point would be to go right for the T6 kit that was designed for what you are looking for!


Jon

Superman09

iTrader: (65)

Also have this available. Figured I might as well leave it here for you to browse!

https://ls1tech.com/forums/parts-cla...turbo-kit.html

Razor

92 wheel...now 96.

stock48

iTrader: (17)

To OP A 7~900 HP 408 turning a max of 6000 RPM would be fair with a big T4 turbo but it will be leaving power and RPM on the table vs the proper T6. A T4 is even tight for a high output 6.0L but offers really good spool at the trade for some MAX power.

Yea I ran the smaller 76/92 which should really be called a 76/82 if comparing to a turbonetics, Garret, or precision due to how BW rates turbine by inducer. The new 76/96 (76/88) has not been ran yet at the track but it's lol

transamfreak01

iTrader: (8)

Ok thanks a lot for all the info guys. Going back to my original plan. Going with a t6 set up and most likely a s480. After everything I have been reading it seems like the best plan. The s480 should also give me some room to grow.

Superman09

iTrader: (65)

Should work excellent for you! Be sure to let me know if we can be of any assistance in your build!

LASTLS1

iTrader: (7)

I've made over 2000 hp and went over 200 mph in the 1/4 with t 4's.

Superman09

iTrader: (65)

Plural however.... T4's meaning 2

LASTLS1

iTrader: (7)

Pretty sure he could meet his goal if he wanted using a T4. Pretty sure I'll run 6's this year with T4's.

I'm a 430 ci.

I also spun mine up to 8500 rpm.

Superman09

iTrader: (65)

He is not referring to a pair of turbos however. He is talking about a single turbo set-up, you have Twin T4's, not 1

LASTLS1

iTrader: (7)

I understand the single, lol. I would like to try a T4 single on a street car. Track car I would use a T6