Questions for Justin...

[JusMX141]

The 47 lbs/min from the same turbine on the 68HTA would probably be due to the higher efficiency of the HTA wheel. Increased compressor efficiency will allow more of the exhaust to be wastegated around the turbine at the same airflow. That being said, I've never run or tuned one.

So what's stopping someone from putting a 60-1 compressor on a tiny TD05H turbine as long as the wastegate is large enough to flow the additional amount of air the 60-1 generates over a 16G or 20G?

Not saying I disagree with your statement, Kevin....just trying to get some more info!

 

[Kevin Jewer]

Nothing wrong with that! The key is efficiency. The 60-1 is larger, but hardly efficient by today's standards. My compound setup isn't too different from this example with all of the airflow from a 110 lb compressor wheel going through a little 50 trim turbo. That vast majority of it is wastegated, only what the 50 trim needs to supply the shaft power required to do its work is passed through the turbine wheel.

Another thing to consider though is what happens when you don't bother with the wastegate and just let it max out, and all flow has to go through the turbine. This is basically the case at max compressor flow anyway and is probably what we should be talking about. A more efficient wheel that moves more air at a lower shaft rpm should allow more max turbine flow. You can see evidence of this when you're up against the turbine limit and airflow goes up in colder air. On that 5H 20g I've seen it consistently max out at 42 lbs warm and 44 lbs cold. If the turbine limit was just a set mass flow limit inlet temp shouldn't matter. The additional airflow with cold inlet temps comes with no additional shaft power/rpm required (which is why it also helps spool), which lowers shaft rpm for the same airflow from the compressor. I wish I could explain it better, but I'm still learning much of this myself.

Edit> Even with airflow maxed out at 42-44 lbs/min, I'm still able to raise boost. This tells me the WG must still be opening, unlike the case of the compressor being maxed out. So the scenario where all of the exhaust product has to go through the turbine may not apply, getting us back to compressor efficiency again and the speed matching of the two wheels...

 

[polarmoment]

So what's stopping someone from putting a 60-1 compressor on a tiny TD05H turbine as long as the wastegate is large enough to flow the additional amount of air the 60-1 generates over a 16G or 20G?

I think what 95GSXracer is saying is that the HTA's efficiency allows it to move the same amount of air without needing as much exhaust energy/flow to drive it, therefore that extra flow can be wastegated.

The output limit of the compressor is tied not to the mass flow of the turbine at choke, but to the energy extracted by the turbine at choke.

Completely making up numbers here for the sake of example, but if compressor A requires 300kW to move 50lb/min of air and the turbine it's paired with chokes at 50lb/min and 300kW, the total output of the system is limited to that 300kW of drive energy to the compressor, or about 50lb/min. A bigger wastegate doesn't help because the issue isn't lack of flow, it's lack of drive energy to the compressor.

But, if compressor B is more efficient and can move 55lb/min with 300kW of energy despite being paired with the same 300kW turbine choke, total system output increases to 55lb/min because excess flow can be wastegated without dipping below the 300kW necessary to drive the compressor to 55lb/min.


I'd like to see turbo manufacturers start publishing some required drive power vs. mass flow specs for various compressors, and more of them to publish turbine drive ouput vs mass flow.

 

[Bud92gsx]

Justin I got a question about rebuilds..Usually does a rebuild cure shaft play?

 

[JusMX141]

Does an engine rebuild cure rod knock?

 

[Bud92gsx]

HA HA HA HA HA..Send me a pm on your rebuild price please..I havn't decided If I wanted a new compressor wheel yet..

 

[Killa_dsm]

Quick question Justin, what/how do you clean a turbine housing with caked on oil? Just rebuilt my friends pte and he has a ton of burnt oil in his turbine housing? Its really caked on there because he ran it for a while, even though it was pushing oil.

 

[JusMX141]

Soaking the housing in a type of cleaning solvent (parts wash, kerosene, etc) removes the oil film....a strong-bristled wire brush wheel on a grinder or drill will make short work of the burnt-on oil which remains.

 

[my dreamt dsm]

LOVE the thread title, by the way.

http://www.dsmtuners.com/forums/turbo-system-tech/381288-evo-1-3-turbo.html

Why do people pick an evo 2 big 16g over an evo III big 16g. From search I was doing on here about the evo2, which isn't much. Justin stated that the evo2 big 16g was just paper thin in blades. I guess it goes a long way then.

"Bigger by .010"; the thickness of two sheets of notebook paper."

I'm looking for about 250whp. Besides a evo3 big 16g and a little more then the 14b will the evoII big 16g be a problem to get me there?
Justin if you can give me the down sides and good sides about the turbo from your OWN experience it'll be great.

 

[turboglenn]

Hope this wasn't already asked, but where's the best place to get a low cost rebuild kit for a dynamic seal y3/4 turbo? I"m on a tight budget as i'm sure you know

Thanks

 

[JusMX141]

I'm looking for about 250whp. Besides a evo3 big 16g and a little more then the 14b will the evoII big 16g be a problem to get me there?
Justin if you can give me the down sides and good sides about the turbo from your OWN experience it'll be great.

The Evo III 16G is cheaper and has more potential than any other 16G. I don't know what else you'd need to know in regards to comparing the Big 16G to the Evo III.

Your power goal could be attained with pretty much any 16G option out there. If you have a Big 16G, run it. If you have an Evo III, run it. The difference will be such that you wouldn't even notice when running both turbos back-to-back.

Hope this wasn't already asked, but where's the best place to get a low cost rebuild kit for a dynamic seal y3/4 turbo? I"m on a tight budget as i'm sure you know

Thanks

With what thrust plate, Glenn? Have you considered contacting Majestic and see if they'll sell you the parts you need?

 

[turboglenn]

EDIT: Justin, it's just a standard, non-bolted down 270* thrust plate, i could always drill and tap the housing to use a 360* but i'm not so certain from all i've seen on this forum if adding that really makes a difference I've fed my 57 trim from the head for well over 110kl miles and it's as good as it was the day i built it. And the only "special precuations" i've taken with the oiling is using only synthetics (except durinmg new engine break in) and then before putting the drain to the pan I'll run the car for 30 seconds with the drain into a measuring cup and as long as it meets the requirements laid out on the majestic website i call it good and go. I know people that can't keep a turbo for a year without it being junked, i've been on the same one for around 10 and it's fine except for some major compressor wheel wear


But, as for majestic, that's where i went and worked as an aprentice under the old owner Kevin Drapen learning how to build, balance and machine turbo parts. But, the new owner severely pissed me off by talkin ish about kevin who i consider a friend; and call me silly but the things that were said were way uncalled for considering kevin sold this guy the business, and my morals just won't let me buy there any more.

I was just looking at some on line from 56 to 130 bucks, and didn't know if the ones that are on ebay are junk or if there's a "good" ebay seller for them?

 

[zeekster777]

what does this # stand for on the turbo?
Its on the inlet side of the turo. Thanks if any one can help
looks like it say AB28
<table style="width:auto;"><tr><td><a href="https://picasaweb.google.com/lh/photo/OydGGMpQkSXj5HgsN8Vlag?feat=embedwebsite"><img src="https://lh3.googleusercontent.com/_5gb07DlBZOE/Tbx6x41T09I/AAAAAAAADzQ/2DewFOFzbvw/s640/IMG_20110430_140814.jpg" height="478" width="640" /></a></td></tr><tr><td style="font-family:arial,sans-serif; font-size:11px; text-align:right">From <a href="https://picasaweb.google.com/zeekster7777/Gsx?feat=embedwebsite">gsx</a></td></tr></table>
thanks for any help if you know

 

[JusMX141]

Who knows? Could be a production date code or another code put there by the person who did the final inspection. It's useless, if that's what you're asking.

 

[zeekster777]

Who knows? Could be a production date code or another code put there by the person who did the final inspection. It's useless, if that's what you're asking.

yes thats what i wanted to know thanks

 

[Bud92gsx]

All 2g turbo's are Garret t25's right..Do some say Garret and some don't?

 

[JusMX141]

All factory 2G turbos are T25's. None had "Garrett" on the compressor cover to my knowledge.

 

[JwpRider]

Hi Justin,
Finally got all the 'stuff' to install the 16G. (damn those OEM turbo-mani bolts/washers are expensive!). So I have this oil feed line 'kit' from the head, EXTREME PSI : Your #1 Source for In Stock Performance Parts

My question is "do I need a restrictor of some kind, or will this be OK?
Second, I bought (4) new OEM O2 housing bolts (at like $10,000 each) thinking I could replace the one stud with a bolt...is this possible, or did I make a bad assumption?
Thanks again for all your advise...followed to the letter. ExtremePsi is fast..got parts the next day!

PS: Do you know anywhere 'local' to get correct high-temp anti-seize (or what temp it should be rated for). What I have is 1600F.

 

[JusMX141]

Hi Justin,
Finally got all the 'stuff' to install the 16G. (damn those OEM turbo-mani bolts/washers are expensive!). So I have this oil feed line 'kit' from the head, EXTREME PSI : Your #1 Source for In Stock Performance Parts

My question is "do I need a restrictor of some kind, or will this be OK?

From the head you should be fine.

Second, I bought (4) new OEM O2 housing bolts (at like $10,000 each) thinking I could replace the one stud with a bolt...is this possible, or did I make a bad assumption?

If you're using the stock o2 housing, it's pretty much impossible.

Do you know anywhere 'local' to get correct high-temp anti-seize (or what temp it should be rated for). What I have is 1600F.

I have the Permatex Nickel anti-seize, and I also have another anti-seize here that is good to 2200*....but as far as being available in small quantity I'm unsure, and the Permatex Nickel brush bottle is around $30 if I recall.

 

[JwpRider]

Justin, thanks again for the info!
Anyway, here is something I saw on Hahn's site. Wanted to get your input...is this just some marketig hype?

"Turbo Oil Line Upgrade Kit, Factory Turbo Cars, 1989-1994: In testing some years back, we discovered that the oil pressure available to the turbo on 1989-1994 factory turbo cars can be very inadequate, sometimes only a fraction of the oil pressure available at the oil pump.# Examination of the turbo oil supply showed the problem: the turbo oil feed was tapped off the end of the cylinder head, as far away from the oil pump as possible.# Mitsubishi engineers also discovered this problem, as they re-engineered the oil feed on 1995-1999 cars to draw turbo oil directly from the oil pump housing.# And that is exactly what this kit does for your 1989-1994 car, for greatly enhanced turbo durability."

Want to hear from the "Turbo Authority" on this one!

 

[hubz91talontsi]

JUSTIN! I need info on h1c's! What were the possible comp wheel specs. Where can i find billet wheels? Which exhaust housings are interchangeable. Also is there a after market vband exhaust housing? Thank you sir.

 

[pantherballhp]

in for the answer on the h1c as i have one laying around

 

[JusMX141]

JUSTIN! I need info on h1c's! What were the possible comp wheel specs.

All had 8-blade compressors with 83mm exducers to my knowledge....inducer spec can be 48mm, 50mm, 52mm, 54mm, and even 56mm on the wastegated model.

Where can i find billet wheels?

You probably won't find one for a H1C. Compressors are not interchangeable between the H1C and HX35 models because the compressor seal collars are different widths.

Which exhaust housings are interchangeable.

If it fits a HX35, it should fit the H1C.

Also is there a after market vband exhaust housing?

Just the Bullseye Power .70 a/r T3 housing.

You must be logged in to view this image or video.

 

[hubz91talontsi]

Alright, thank you very much. I'll be running up there in a few months with 2 h1c's =). TTSBC FTW!!

 

[Bud92gsx]

Justin can you send me the compressor map for the 13g and 14b..And also the spool rates if you can remember them please..Also how much would it help to have a 7cm turbine housing on both..I know you can run the 14b to 20psi, but what about the 13g?