Project S13

Hello I'm looking to turbo my ka24,

I'm looking at the holset turbos. My question is what turbo do you guys think I should use if I'm looking for 250 whp with room to grow.

Preferably t3 flanged.

Also I'm looking for a turbo that starts spooling around 2.5 to 3k rpm.
This is for mpg efficiency.

I've tried searching with not much result.

Let me know your recommendations .

cotbu

I personally like the hy35!

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LoverTechnologies "Half Broken Things!"

Project S13

Could you tell me a little bit about this turbo from your perspective.

Like lag
Specs
Clocking.

Any of your personal prefrences.

Croustibat

I recommend buying another car known for mpg efficiency, and use this one for fun, when fuel efficiency is not a problem aka when you earn more money, or when you dont need to daily drive it (seriously).

Project S13

I knew somebody was just gonna have to post this.

Just because I want to get good gas mileage and also be fast doesn't mean I'm broke , need a better job or get another car.

I will find what I'm looking for but thanks for helping out tho.

Croustibat

and there is a reason for that : everyone would rather have a car that does not eat fuel AND go fast AND look good AND be practical AND be cheap and so on.

Fact: it does not exist.
You need 2 cars. Been there, done that. Got a comfy one that burns no fuel and has room, and a heavily modified S13. Before that i just had an average S13 that would still eat a lot of fuel, tyres and needed frequent maintenance because of the mileage.

You can believe the opposite, but then dont come crying, esp as you dont know anything about these particular engines, or the downsides of adding a turbo (or getting more performance).

No offense but it means you dont know anything about cars. You need to get real. You are free to believe in the holy grail, however that wont make it appear.

No you wont ... you will find people telling you what you want to hear though.

The same kind of people who will surely go missing when your engine blows, or when you end up with worse mileage than ever.

This really is occuring so often it becomes boring ... you are all so predictable.

Project S13

To start this off, I do know about cars. Not much about turbo but in general I do.

This would be my first turbo motor to own. I've seen threads of people getting 25 to almost 30 mpg being turbo. On a ka.

So don't tell me it don't exist.

And to end this , I started this thread wanting 250 HP to the wheels . I understand if I would have wanted Fully built 300 HP+ and wanting great gas mileage

even if I dont get 27mpg I would like to see my options

Power is not the only thing on my mind. I'm just saying its not impossible.

Croustibat

This thread is the proof you dont. Again, denial wont help.

This is not a turbo motor. It is an NA motor converted to turbo, which is a hell lot different.

I've heard people claiming to be coming from mars, or various other places in the galaxy. Internet is full of lies, so unless you personnally know the people posting, it is better to assume they cant be trusted, even more when they claim things that sound too good to be true.

Which is exactly what is happening here; you want it to be true. You want people to tell that you can get more power and less / same mileage.

Well they did it. The problem is that it is not true, simple as that. The head is not designed for boost, which means lower efficiency, the cams are not designed for boost either, which means lower efficiency, and you need to lower compression ratio, which means lower efficiency.

Even if you make "the perfect tune", the engine will have lower efficiency, and thus more fuel consumption.

And i am saying it is. Actually, every book you can read about turbo engines, or turbo conversion, says it is.

But you dont want to hear that, so that is the end of my contribution to your thread. I know you will be thinking "good riddance" once you read this, but i can tell you something : if you ever post again on this BBS asking why your engine does not work / blew / is fuel hungry, expect to see me posting "i told you, but you didnt want to read that".

PoorMans180SX

twin-scroll t3 HX30. It's about the size of a GT28R, spools super fast with twin-scroll, and makes 350whp at 15psi on a decently setup engine. clocks any way you want it, and should spool to full boost by 3k rpm.

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Build: http://zilvia.net/f/showthread.php?t=643065

Friends don't let friends buy knock-offs.

Project S13

Thank you! This is the type of answer I was looking for. Estimated, I should start spooling around 2500? Give or take?

OrangeVirus1

depends on the AR of the hotside.


I'm telling you, you are going way overkill on a holset for 250 hp.

Is your KA even built?

Get a gt2860, or T28. Spool quick 250whp no problem easy fitment

Project S13

I was refering to this post

OrangeVirus1

why would you even consider a holset for 250whp and unbuilt engine... that is just asking for disaster. a holset could easily flow double your hp goals.

how about something realistic like a t28

Project S13

I think you missed the part were I said "with room to grow".

It's okay tho.

Also a t28 won't hold boost to red line on a ka. As far as I researched.

Please let me know if I'm wrong.

OrangeVirus1

gt2860 will no problem

Project S13

I cant adjust boost with holset turbos? If it makes 350 on 15psi I can't lower it to like 10psi or lower?

Maybe I'm missing something.

OrangeVirus1

yeah it's called a wastegate.


I highly, highly, highly recommend that you study up on how a turbo works, boost, AFR's in boost, all that stuff.

cuz if you aren't aware of how to control boost, you are bound to blow your engine up.

and I'm not being a dick, I'm literally trying to help you.

Project S13

No I get you,

I'm aware of an external waste gate , springs , boost controller , all that. Not 100 but mostly.

I asked because you were saying how holset is over kill. And I figured maybe they weren't like a normal turbo.

Can I just run 10 pounds on that holset to achieve my temporary goal?

OrangeVirus1

you must understand that 10 psi of boost is not the same on every turbo.. 10psi on a k03 might net you like 180whp, but 10psi on a HX35 might net you 300+

If it was ME, and I was set on getting a holset, I would get a hx35, run like 6psi tops until my engine was built. 10psi your engine might blow, 10psi I gaurantee you will spin tires in low gears

Project S13

Thank you I will definitely keep this in mind, also on the gt2860 you were talking about is that t3 or t2 flanged ?

godzillarb

Most holsets come internally gated. However, since they were meant for diesels, the internal gate is often too small to adequately control boost. A lot of guys weld the internal gate shut and use a 38mm external. With the right sized external wastegate and spring, you could run 3psi if you wanted.

If you wanted the turbo to start spooling at 3k, an HX35 would work... but that's a pretty big turbo for what you seem to want. They can make upwards of 450whp. Hell, the HX52 *starts* spooling on my RB25 at 3k and is fully spooled at about 4.5k.

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INTENSE POWER RIPPED ME OFF

cotbu

The Hy35 is the bastard or most overlooked holset turbo. it has a compressor wheel that is 56mm and supports 60lb/m which is what the 7blade HX35 support, but it's smaller on the exhaust side so it spools way faster than a twin scroll hx35 etc. and will work with any t3 manifold. Perfect for a ka's rev range. clocking, make it fit!

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LoverTechnologies "Half Broken Things!"

Project S13

Nice, good Shiit , I actually did see a build thread on this turbo. By when you.think it would start spooling.

OrangeVirus1

he doesn't need a 60lb/min turbo..... unless he wants like 450+ hp.

Gt2860 is T25 flanged.

Also, You can actually get better MPG in a turbo car than NA if you drive it right

Project S13

I wanted to avoid t2 flanged because of upgrade later in the near future. But maybe I can just use an conversion adapter .

When you say driving right you mean staying out of spool?

ghoti

Yeah they do exist but are not making the WHP numbers you want. They are making about the same as a stock blacktop SR.

He's telling you the truth and is trying to help but you're ignoring comments you don't want to hear.

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Project S13

All that dude was saying was to get another car , mpg suck with turbo , I don't know nothing , and that's about it.

OrangeVirus1

Ok so do you know what else you need with a turbo? or you think just get the turbo, slap it on the stock exhaust magically and that's it?
Also just gonna let you on a little secret dude, Holset + 2.5K rpm spooled is called fantasy land.


How are you going to tune it
what injectors do you plan to run?
wastegate and boost psi?
Intercooler with bpv?
oil lines to the turbo, tapping the oil pan / block?

If you plan on just "maxing" the stock injectors, just stop yourself right now and quit.

if you don't know how you are going to tune it ( which i really don't think you know since you didn't know what a wastegate is / does ) just stop yourself right now.


Here is what you need to do dude. Quit looking at cool pics of turbo's on the internet.
Take some time and RESEARCH, and LEARN everything you can about KA-T setups, NA to boost setups, AFR's in boost, TIMING, KNOCK, ETC...
because guess what, if you think you need a holset for 250whp "with room to grow" you have already failed. there are better turbos, that have better flow rates, better compressor maps, Quicker spooling Hotsides, the list just goes on.
And if you only care about spool time, Why don't you research what the hell causes quick spool or slower spools.. Or how hotsides affect Top HP? or anything for that matter.

You could have a HX35 that spools 6000RPM, or one that spools at like 3500 RPM. Go research and find out why.

If you want a holset cuz it's a big turbo and looks like you gots madzzz hp, Don't be surprised when you add a few holes in your block. Start investing in bus passes.



If you buy a turbo before you know what AFR means or what good AFR's are in boost, you have successfully became retarded.

Project S13

THE earlier post you made made me upset but this one was indeed funny. Ofcouse I know what else I need.

I'm gonna run rx7 high impedience 550 injectors
I now know that I would need an external wastegate for the holset turbos ,
I'm gonna be getting it dyno tuned , I was gonna go with the Rom tunes , but nv are Dickks about smog so I wanna pass it.

3inch exhaust , I don't like the fart can look so something more

Project S13

THE earlier post you made made me upset but this one was indeed funny. Ofcouse I know what else I need.

I'm gonna run rx7 high impedience 550 injectors
I now know that I would need an external wastegate for the holset turbos ,
I'm gonna be getting it dyno tuned , I was gonna go with the Rom tunes , but nv are Dickks about smog so I wanna pass it.

3inch exhaust , I don't like the fart can look so something more oval.

Gladman manifold.

Z32 maf

Ebay front mounts and pipes Cus we all know we can cheap out there.

I found the feed lines u need with the proper restrictor just don't remember the name.

Tial Bov.

Aem wideband

Boost gauge

Oil gauge

I'm gonna run an oil cooler

I WAS JUST HAVING TROUBLE DECIDING ON A TURBO THAT'S ALL.

I hope you realize you jumped to conclusions about my knowledge.

But I actually do read a lot.

I was just confusing my self researching so I figured ill ask. Thanks for all your help. And oh Yea FUK YOUUU