rx72c

iTrader: (8)

those wastegates have no priority whatsoever. What do you really expect to happen?

why didn't you just buy a cast Turblown manifold? proven unit?

GucciBravo

It's being fixed with symmetrical wastegate entries. Some people just need to have quality advisors in their lives. No one is perfect.

At least he's not running a Pulsar Turbo that will grenade at pump gas boost figures like I've been saying for years...

Brettus

Give the WGs priority as shown in the diag. Team posted above and problem solved. The reason other turbos or other setups with same turbo don't creep with that same manifold is that you have virtually unrestricted flow combined with a very efficient turbo. So a double whammy , which now means the less than ideal design can't cope.

Brettus

Where can I find more info on this ?

GucciBravo

I've posted this publicly through my business page, YouTube, etc. Weak bearing assembly matched with something that falls out of balance tolerance by half its rated RPM is a recipe for disaster.

Some rotary shops are cheaping out and going that path when they should instead be showing what the real, legitimate Garrett products can do, not the crappy knockoffs.

Brettus

Had a bit of a look around but can only find good reviews .... got a link?

TeamRX8

iTrader: (2)

saw recently they offer a specific ceramic bearing assembly, but couldn’t determine if it was related to addressing this or not because it is log-in protected.

but I prefer a Garrett G-series supercore at a minimum and then to possibly consider the Pulsar turbine housing variations that Garrett doesn’t offer, even though their housings aren’t stainless material, but HiSiMo cast iron.

I’m inclined to believe, but have no proof to offer, that even though the Pulsar is a supposed similar duplicate that the true performance isn’t going to match the Garrett. I can appreciate the economics that drive some people to choose the lower cost alternative though.
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Slides

Half this stuff is probably coming out of the same factory in China as Garrett OEM. If the blade profiles are exactly the same and it's the same aluminium alloy/treat compressor and inconnel turbine are they inferior by magic?

You understand once a facility in China has engineering drawings or even CNC tool path codes it gets passed around right?

The very early turbo combinations from 15-20 years ago trying to swing P trim or larger turbine/compressors off GT35 sized core internals were known to fail, Pulsar didn't exist, certainly in Australia as an own brand then although the same people may have been producing for others. Have these "small catridge failures" been in the last couple of years on G series clone turbos? Or just the "GT45" Ebay specials?

GucciBravo

VSR Proven.

Do better research and personal testing...

TeamRX8

iTrader: (2)

they aren’t exactly the same wrt various details is where the disconnect may be

but at least the turbine housings are interchangeable between some … even if you just want to see how your Garrett G40 1.06 A/R turbine housing might spool compared to a tighter 0.96 A/R, it’s only ~$300 USD shipped to find out.

so on the G30/G35 equivalent they have a 0.85 A/R divided T4 that Garrett doesn’t offer if a super quick spool on E85 is your goal, also a 0.92 A/R IWG V-band on the G30 as well

and I just noticed a new G30 stainless v-band housing that wasn’t on there previously where they have all been cast iron …

however will say their HiSiMo cast iron housings are nicer than other brands, honestly thought it was stainless steel the first time having one in my hands.
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Slides

So to be very clear, the units you had fails on were Pulsar (PSR on housings) supplied and branded? Or something else? There are a lot of drag users in Australia and the UK running E85/Methanol only boost levels on Pulsar branded turbos.

GucciBravo

To be clear, I won't support knockoff companies and trust a VSR machine from independent companies. There's another VSR here that I'm able to work with and can confirm this across their range if budget allows next year. Pretty hard to do independent testing out of pocket, but I'm always down to document CHYNA knockoff companies.

I won't even support Turbosmart's new endeavor with HPT Turbos because of the history of HPT and reliability.

Supporting the companies that have provided quality and reliability: BogWeiner and Garrethhh. No one else ponies up the hard earned money to provide compressor and turbine map data, which is very expensive to perform.

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TeamRX8

iTrader: (2)

^^is the extra flange for ALS?
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GucciBravo

44mm Bosch DBW Throttle Body for Anti-Surge valve.

Since I have TMAP at Turbo Inlet, Turbo Speed, Boost Pressure, etc, I can model where the turbo is landing on the compressor map and optimize it to never surge when coming back on throttle or have any reversion to slow the wheel down.

TeamRX8

iTrader: (2)

seems like a waste to have all that and then not make it fresh air ALS, which is going to overcome surge lickety-split.

it’s coming though …
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Slides

@GucciBravo Garrett is Chyna.

spdracerUT

Garrett is global with manufacturing on four different continents. I'm pretty sure their aftermarket G-series is assembled in the Mexicali, Mexico location.
https://www.garrettmotion.com/corporate/our-locations/

Of course, the sub-components come from all over the place. How the CHRA is assembled and balanced is critical to the performance and longevity of the turbo. Use all the exact same parts, but don't assemble the same or to the same tolerances, and one will be garbage.

spdracerUT

Garrett compressor wheels in their aftermarket offerings are machined from forgings. That's what makes them stronger and probably balance better too; fewer porosity issues. The smaller Garrett G-series use MarM for the turbine wheels. Beyond material selection, there's still a lot of important processes in the casting and heat treatment of the turbine wheels which differentiate a quality product from a piece of crap.