Help me select a T3 turbo with an internal wastegate (400hp in mind - Page 2 - Miata Turbo Forum - Boost cars, acquire cats.

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DIY Turbo Discussion greddy on a 1.8? homebrew kit?

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Old 03-29-2011, 04:14 PM   #21
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The HY 35 may be able to get you there and would have much better spool than the HX Holsets.
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Old 03-29-2011, 08:21 PM   #22
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Quote:
Originally Posted by sixshooter View Post
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.
Do these blown/damaged turbos indicate a quality issue?

Also, gotpsi?, I had an even more difficult time finding HY35 turbos. Let me start looking again. I am on the prowl for a 600hp capable turbo.
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Old 03-29-2011, 11:07 PM   #23
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Model: HX30
Compressor Wheel Data

A
Inducer Diameter
44.00 mm

B
Tip Height
4.25 mm

C
Exducer Diameter
73.00 mm

D
Hub Length
39.00 mm

E
Bore Diameter
7.00 mm

No. of Blades
6/6

Trim
36


HX35

Compressor Wheel Data

A
Inducer Diameter
46.00 mm

B
Tip Height
4.00 mm

C
Exducer Diameter
83.00 mm

D
Hub Length
39.00 mm

E
Bore Diameter
7.00 mm

No. of Blades
8/8

Trim
31

Last edited by fc3s690; 03-29-2011 at 11:09 PM. Reason: too much spacing
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Old 03-29-2011, 11:14 PM   #24
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I'm going to see if my local turbo rebuild shop can make the hx35 wheel fit my hx30 housing, this is pretty much what the diesel guys are doing to the hx35s to make hx40s.
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Old 03-30-2011, 03:00 AM   #25
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EFR7064 T3 0.83 A/R DO IT.

The internal wastegate setup is on ******* point + the bigger the turbine wheel the more you'll notice the spool advantages of the lightweight Gamma TiAL wheel. It's obviously more expensive, but it isn't some piece of **** diesel nonsense.
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Old 03-30-2011, 09:04 AM   #26
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^^ what he said - the mother of all T3s
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Old 04-15-2011, 06:40 PM   #27
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I ordered a new CHRA for the hx30w, I'm going to rework my tune and possibly ditch the 2.5 exhaust for some 3 inch. Maybe look into my drivetrain set up an work on getting the power to the ground (LSD & maybe 6spd swap).
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Old 04-20-2011, 12:35 PM   #28
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http://www.squirrelpf.com/turbocalc/...13&map_sel7=95
click on "refresh maps". Most of the data put in is educated guessing. I picked out some mentioned, but they don't have any of the new EFR maps from BW.
For what it's worth, the Holset HE351CW has just about the same compressor as the HX40, but with a wastegated T3ish flange.
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Old 04-29-2011, 02:45 PM   #29
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pretty sure my exhaust is what is holding my set up back (fm 2.5 down pipe - test pipe - racing beats power pulse muffler.)

boost pressure falls off after 5800rpms, 20psi @ 3800rpms to 15psi @ 7000rpms.

if i can keep boost pressure from falling off and a/f good, I'll be happy with keeping my holset hx30w.
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Old 04-29-2011, 02:52 PM   #30
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omg, upgrade that **** stat!

I gained over 30rwhp ditching my 2.25" borla dual exhaust for a 3" catback.
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Old 04-29-2011, 03:18 PM   #31
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4" ftw. Pleaz lmk if it fits
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Old 04-29-2011, 03:20 PM   #32
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I always thought about a 4" cat and catback. in the least a 4" cat back to a 3" exhaust since it's the most restrictive.
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Old 04-29-2011, 03:21 PM   #33
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gotpsi? your sig has a mispelled word.
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Old 04-29-2011, 07:27 PM   #34
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Any recommendations on exhaust set ups? I will most likely do 3inch stuff.
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Old 04-29-2011, 09:53 PM   #35
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Fine then buy my enthuza stainless 3" exhaust. Magnaflow muffler. Test pipe and also race cat comes with it.
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Old 04-30-2011, 12:01 AM   #36
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The way my holset sits it's nearly impossible to run 3inch from the turbine back. I wonder how much hp/spool time I'll loose using the fm 2.5 lower downpipe section....
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Old 05-13-2011, 03:21 PM   #37
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Installed the reman'd hx30 crha, ran it about 15miles. Parked it at the store, started it back up after 30 mins. Damn turbo sounded like a vacuum and would not build any boost. Checked over everything for loose connections or oil supply problems. Found nothing wrong.

I went ahead and put my old turbo back on and it ran fine (besides the side to side play)

Reman unit is getting sent back now for inspection. Oh I love waiting on parts...
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Old 05-13-2011, 03:40 PM   #38
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did it sound like this:



?
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Old 05-13-2011, 04:09 PM   #39
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2.5" exhaust isn't gonna drop boost in the upper rpm. usually when that happens it's because the turbo can't flow enough air to fill the cylinders AND keep boost at that pressure. the small exhaust will slow your spool (slightly) and restrict your whp, but not cause boost to fall off. 2.5" is fine at the turbine, go to 3" as early as possible, as straight as possible, i don't run a cat only a 3" dynomax race muffler (straight thru design) that looks like a resonater and it's not too loud. the bigger the turbine, the more noise, but even on my galant vr4 with a ported t3/t4 and the same exhaust setup, but all 4" and it was fairly quiet cruising. wot sounded awesome @ 28psi
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Old 05-13-2011, 06:19 PM   #40
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braineack the turbo sounded exactly like that, wierd thing is that I found no sign of compressor to housing contact. I personally thought the compressor wheel came loose and was freewheeling, or some how was not balanced correctly.

As for my exhaust situation, I plan to just run a downpipe and see if my boost doesnt fall off that way so I know its the exhaust holding me back and not the actaual turbo.

if boost stays where it needs to be then some 3 inch will be welded up.

I also picked up a 18psi wastegate actuator to make sure my door isnt blowing open.
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