Help me select a T3 turbo with an internal wastegate (400hp in mind
 

Im looking for ideas on selecting a new turbo that has a t3 footprint and an internal wastegate. I currently have a Begi t3 manifold with a holset hx30. Performance is great but I'm looking for more power. I've started looking around for a different set up. But I haven't really found anything solid yet.

Anyone have any ideas for a 400hp set up that's internally gated?

My set up is a 95 forged bottom end with a 99 stock port head.
I don't want to run more than 20psi and would prefer pump gas and maybe meth injection.

How about you quit trying to plan a 400hp build around a fucking exhaust manifold?

If you're planning a 400hp setup, the relative cheapness of a manifold and EWG setup is going to cost pennies compared to everything else you're going to need to make 400hp.

HX35 or a HE351 would get you there.

However, playing around with the Holset waste gate can might not be so much fun.

I only sorta know garrett turbos and the only IWG turbo they have that can make 400hp is the 3071.

Maybe an 18G?

18G can definitely do it, but it will be tricky. You can get an internal gate 20G and that can make 400HP pretty efficiently.

I would also consider something like an S300 series BW. You can get some interesting tubrine housings there with internal gates from places like Bullseye.

Why is internal gate such a big deal? After yers of boost creep lameness on my old DSM I just did a super ghetto EWG setu on a stock mani and never looked back.

Word. How about you just buy my setup. Proven 398hp EWG.

people were giving me shit for wanting internal for my 300whp setup.
I went iwg anyway. it DOES creep a little bit, like 1-2psi in 4th/5th between 5500-6000.
I actually like it a lot, its quiet and still gets the job done.


now,

at 400 I don't know how badly the creep and boost instability might be, so I'd be really nervous about running iwg.

maybe if you go with one of the new bw efr turbo's that has a really nice iwg setup, but on a regular turbo I'm afraid it would be creep city for you.

Boost creep isn't necessarily bad as long as you're not blowing shit up.

creep = lack of control

True, and with built motor and e85 1-2psi doesn't hurt anything at all.

I must say though, I ported my wg opening a LOT. Had I not done that I'm almost certain I'd be seeing a ton of creep.
The new bw efr turbos seem to be doing just fine iwg, and I think it has to do most with the way theirs is designed. So at least now we know that you CAN have good control and flow through an iwg turbo, just depends on how its designed.

I truly hope other manufacturers see this and we start seeing more well designed iwg turbos.
EWG routed back into exhaust stream negates the power gains and vta just isn't for everyone (that doesn't want to wake the universe when they go WOT)

I must know how the spool is on that HX30, and what cm housing you have on it, pix are a plus!

The housing is a 9cm2, I'll have to post a pick of the turbo later. I'm pretty sure I have my turbo tapped out right around 320whp. 3076 or a 3071 are looking good so far.

spool @?
full boost @?

Stock 1.8 head?

Head is a stock port 99, with supertech valve springs.

Right now I'm pushing 20psi, I see full boost right at 3800rpms.

Nice! when you get pix I would love to see this setup!

FWIW, you'll never run all of it if you have a wastegate.

Hmm. I have access to an HX35 and an HX40. I'll check to see if they are internally gated.

Some hx 35s & 40s have internals and some do not. Still haven't really decided on a turbo so far, I've started researching more on holsets again. My hx30 compressor wheel now has a 44mm ind. And a 73mm exd. I have found after market hx35 compressor wheels that measure 46mm ind. And 83mm exd. I'm going to see if the compressor housing can be machined to accept this larger compressor. I have yet to see anyone accomplish this yet, maybe it has never been attempted.

Do to clearance issues with my manifold/turbo combo I can not step up to a hx35.

I was looking for holsets earlier this year and was interested in a hx40. I had a hard time finding them used though-- I was looking on cumminsforums

eBay is usually littered with them. Check out a chart that lists all the different turbine housing sizes, sometimes the name changes depending on the housing size. It's weird, I don't understand it.

Just give it a few days and more should show up on cummins forums.

Also be on the look out for variants like the HY/HY 35/40 hybrids. There are a bunch of different, usuable turbos that come up.

Have thought about a HY35, HE341 or HE351?

Those are all a step up from the HX30 and will net you 400hp.

We are, amongst other things, a Cummins engine dealer where I work. We end up with blown/damaged turbos somewhat frequently. The HX40 is typically not found on the B-Series (5.9 liter) engines that come in Dodge pickups. It is more likely to be found on the 8.3 or 8.8 liter engines found in larger trucks and machinery.