Question Aboiut Turbos, chyea Options

[David B]

okay

i bought a XS power turbo manifold for dohc ka

my friend is giving me a okay t25, probally for like 50 bux or towards free

and also if he steps upi can have his SR injecters

i have a tapped oilpan also

and my manager has a dohc ka 87k miles auto, i can have if i pull

GT2860R, my friends got one for 200 dollars, its got no shaft play
i was going to offer him 150
Turbine
-Wheel: 53.85mm w/ 76 trim
-Housing: .64 ar

Compressor
-Wheel: 60mm w/ 62 trim
-Housing: .60 ar


is it worth to drop 200-150 dollars or could i stay with the t25

can i use sr injecters with the bigger turbo

my idea is to stay away from any sort of bigger turbo like that, but im not sure

more insight, ive been reading on katorg

thanks

This post has been edited by David B: Sep 18 2009, 09:10 AM

[Xano]

its worth it, the T28 will boost much higher and smoother.

[David B]

what about stock sr injecters, and the fuel flow. what fuel pump am i upgrading to, what intercooler piping is needed to fit that/what intercooler, what fuel management system. man. so much stuff i dont know about, i feel like i know nothing again


im asking to upgrade to a turbo like that, is it going to be alot more bs in the long run

also if i have more hp wtf do i do with 14x6.5 hoshino wheels, more pushes me to sell them, to make this whole plan come more to life finacially wise

This post has been edited by David B: Sep 18 2009, 09:28 AM

[JonB]

I think this is the one;

Happy Boosting

[Jay]

First things first. The dohc manifold will not work on a sohc. So you will still need a manifold

Fuel? Wahlbro 255. More than plenty.
Management: low boost for either turbos, sr injectors will be fine. Along with a cheap Afpr. You could use an SAFC II. Or go with en ecu (recommended).
Intercooler: use your judgement. A stupid big intercooler won't gain you anything over one that is sized for the turbo (which is not needed to be an exact science.) you've a good enough sense of judgement for this. I don't doubt you
Piping: whatever you want. I shy away from huge differences, but just use the sizes that mate up to everything. If you need to make things big, then do it. The only thing to consider with that is velocity, but you'll be running a very forgiving system with either of those turboS.

Much respect for it being daunting to you. I never was, but I luckily never paid the price. If you have more questions. I'll be happy to help

[David B]

First things first. The dohc manifold will not work on a sohc. So you will still need a manifold

first things first, foreal jay, im done asking, you gotta read my posts before posting

[jeffwins24]

you're going to need a tune or a ECU tuned for a boosted setup. N/A and turbo ECUS have different maps.

as the turbo if you want fast spool i think a T25 is very good. I heard of one guy pushing 340 LBS torque and 260hp on a sohc ka.

As long as it's not a turbo from a RB engine you're good to go.

[Jay]

I did, but it's an iPod. Things get missed

[David B]

so.chip? safc?.... perks?

[SlickS12]

As long as it's not a turbo from a RB engine you're good to go.

you say this like the t28 is bad. My opinion is if you plan on buying something you might as well go with what you're gonna want in the long run. Its like wanting a set of wheels, 18's maybe, but instead buying a set of 15s thinking oh ill just buy the 18s later down the road and wasting your money in the first place? I love comparisons, lol, but does that make sense? Dont compromise for something you'll want later is all.

[Jay]

ipoNow that I'm on a laptop, I can fully answer more of the questions, Sorry I didn't remember all of the details when I was on the Ipod dave. I was in class, and forgot many of the things amongst my divided attention

I would stick with the T25 or T28, It's going to be more forgiving to anything that isn't set up exactly as it flows less air. Yes it means less power, but it's easier to get into the green and beat the shit out of with less potential harm. SR injectors probably will not run the GT2860R. But it's worth investigating for low boost, even though that compressor map doesn't look like it likes doing it. The T25 will be a great starter turbo, and will carry you into 250 hp with more than 250 lb/ft of torque at the wheels, and an AMAZING midrange. Extremely snappy on the KA. If it's worth anything, I'll be running a T25 on my KA for a little bit while I build another KA to suit my HX35.

If you would like to turbo the DOHC, I would practice on the SOHC first. Once you have the DOHC the SOHC motor will be a perfect test/learning motor for you. Only problems is a couple things won't swap. (manifold, injectors, and if you go with an ECU). But this is up to you entirely, as money is a factor.

so.chip? safc?.... perks?

Perks
SAFC-
Cheaper, can be easily had second hand
On the fly adjustment
Fairly accurate
easier wideband integration

Chip/whole ECU
No wiring mess
easy, plug and play
Depending on the ECU bought, On the fly permanent adjustment
Stealth factor
extremely accurate
Much more in depth fuel band. Can use a laptop for tuning and consult.

There's more for both, But that will be the basics

CONS
SAFC
Is a wiring mess. One false move and poof, SAFC and ECU gone
Not as accurate as ECU
Familiarity with the device. Get used to it before starting the car
No consult, Less tunability. Can't watch even half as many gauges as the ECU
timing is a big issue to work with

ECU
Little but more expensive, But I have used EMance on ebay, He's an awesome guy, and knows his stuff. A whole ECU for 250 dollars that has complete adjustability much like the the 1000+ dollar ecus. Even comes with consult and cable

If the wiring in the car isn't perfect, you run the risk of popping the ecu, but if yours is fine already, I wouldn't be concerned in the slightest.

Etc.

Oh, and Slick, The RB T28 is made of ceramic and grenades at 14 psi. I'm guessing that's why it wasn't recommended to get that one.

This post has been edited by Jay: Sep 19 2009, 12:54 AM

[SlickS12]

Oh, and Slick, The RB T28 is made of ceramic and grenades at 14 psi. I'm guessing that's why it wasn't recommended to get that one.

Ouch, that sounds like it'd ruin your day. It looks like wont be making it on my build list. So is that all t28s, new and used, or just factory rb turbos?

[Jay]

Ouch, that sounds like it'd ruin your day. It looks like wont be making it on my build list. So is that all t28s, new and used, or just factory rb turbos?

Factory RB only. It was a BB Ceramic blade

The later SR T28 is a BB non ceramic blade... good to go, and the earlier SR T28 was your traditional Non-BB non ceramic blade turbo

This post has been edited by Jay: Sep 18 2009, 04:01 PM

[SlickS12]

Factory RB only. It was a BB Ceramic blade

The later SR T28 is a BB non ceramic blade... good to go, and the earlier SR T28 was your traditional Non-BB non ceramic blade turbo

thanks, good info to know.

[Jay]

thanks, good info to know.

Here's a great info post that will help you with your build, and possibly give david a little bit more info

Zilvia.net Factory turbo list

[SlickS12]

Here's a great info post that will help you with your build, and possibly give david a little bit more info

Zilvia.net Factory turbo list

I just read this and got schooled, it just reminded me that I know nothing when it comes to turbo specs, lol.

[Leegamer]

Here's a great info post that will help you with your build, and possibly give david a little bit more info

Zilvia.net Factory turbo list

Wow. Good info Jay. Bookmarked.

[sam31183]

i skimmed this...so my flame suit is on...but here goes.


I remember david saying he wanted to get a sbc because he didnt want anything to do with lag...but wanted more power...now we are talking turbos...which is fine. But if you can get decent power out of a smaller turbo...do it. You will have less lag then from a larger turbo.
My suggestion to you is to read up on some different turbo builds and ask about where the turbo spools and how much lag...take careful note of the parts used...what works, and what doesnt, and keep in mind what you want to do with the engine when its done. There should be a ton of build threads out there tho since kadet has become so popular...unfortunatly not very many people have done kadet s12s...but the ideas should transfer over...you will just be slightly faster because you are lighter.

[Alex Frost]

Just adding some additional info on the SAFC. It works by changing the amount of air the ecu "thinks" it is getting. The issue you can sometimes run into is that a NA ECU advances timing like crazy when it sees lots of air; where as a turbo ecu does not advance nearly as much. So if you adjust your SAFC into the + then you are not only adding fuel, but you are also adding timing into the mix, which can be very dangerous on a turbo motor. Now this is a little bit different but we turbo'd my brothers NX2000 and added the same T25 and same 370cc injectors as what you mentioned above. We are using the original SAFC (no screen) and all the settings we have put are in the negatives and so far at 7-8 psi it has run perfect. So with that in mind your setup should be close. If you ahve the cash to dish out for an AEM EMS or the like I would do it, but if you don't and you run low boost a SAFC should work. Other things to consider is a Wideband AFR gauge...these are very important to tune and are only a couple hundred bucks used. The other is my recommendation to replace the head gasket...you will be drifting and beating on the motor and a good metal head gasket would be worth it.

[silverarrow27]

For the price, go with the GT2860R and stock 370cc sr injectors will not cut it with that turbo. Now if you were using s15 480cc injectors, I would say yes for now.

Your choices is either an afc or ecu tune. T25 in my opinion is too small for a 2.4L displacement engine. I would go with an ecu tune to get rid of the speed limiter mainly. Afc for fine tuning if you'd like.