Turbo for Ka-T

[lonnie808]

I've done A LOT of thread diving and research for turbocharging my daily driven KA24de. I have all of the corrisponding parts for a mid budget build i.e. fuel, intake, exhaust, mild engine build and engine management. Through my thread searching, I have come across so many suggestions, opinions and flames on turbo selection for KA's. I'm not looking for a "Dyno Queen". Just a fun daily driver.

My goal: 280-300 whp.
My question: Is this turbo too small for a KA?

http://www.turbobygarrett.com/turbobyga ... 0382_3.htm

Page has the accompanying compressor and turbine maps.

[biggie]

Should be good for quick spool, I don't really see a problem with it.

[WDRacing]

Well the compressor will support 300whp, the only issue I have is the T2 exhaust housing I just think the T2 is to small for the KA. It's the only thing that will limit your ability to make power. Not a bad turbo, just not my first choice.

[biggie]

True the T2 is the possible choking point.

But I assumed that he had everything already that he mentioned including the T2 flanged manifold. If he doesn't have the manifold already, the go T3 for better efficiency at 300hp.

[WDRacing]

If if was a .86 AR exhaust housing and he was going to use a larger external wastegate it would be a good turbo. I just don't think the smaller inernally gated T2 turbo's move enough exhaust and you'll either have bad boost spikes or simply to much back pressure. EasyE had a pretty large T2 and he was pushing gaskets out.

Would be a fun car since it would virtually no lag.

I wish I had the money for a twin scroll setup.

[GTR PrYdE]

Being a T2, I wouldn't waste money on anything more than a S15 T28. It will support ~320whp, which will meet your goals and save you money.

If you are going to spend more than that 3-400 on a turbo, then go with a T3 setup.

[lonnie808]

I already have a bottom mount manifold. I was looking at this turbo because of the exhaust housing. 56.5mm wheel diameter,84 trim, .64 a/r. From what I kept finding, you would want the trim and A/R numbers in that range to be efficient. I could be wrong. I am doing a cam swap (248/232) with JWT adjustable cam gears. That should help a little, right?

Yes, I have looked into the S15 T28 and found brand new ones for around $680. But like I stated earlier, I kept finding that T25 and T28 were too small for KA's. That's why when I found the GT3071R, the numbers looked ok to me. So, I asked about it.

So, WD, should I go with the GT3071R or look into a T3 set up like Biggie and GTR PrYde suggested? I've read tons of your post and I would be greatful for your opinion. I know the final decision wil be up to me. A point in the right direction would help alot.

Thank you.

[GTR PrYdE]

A bigger A/R helps but the Compressor is T4 and the Turbine is still a T2, which will choke the Ka trying to move that much air.

S15 T28 is much better suited, the money for the 3071 you want could pay for a 50 trim AND a nice log T3 manifold.. See?

[lonnie808]

Yeah, I see what you're saying. The 3071R is expensive compared to the S15's T28. I think I'm going to look into a T3 setup. But isn't a T3 set up is top mount and requires some fabrication?

[biggie]

Depending on the manifold/turbo you get for top mount it may require some custom IC pipes and Downpipe. Some companies make downpipes to fit their manifold with certain turbos.

[WDRacing]

So, WD, should I go with the GT3071R or look into a T3 set up like Biggie and GTR PrYde suggested? I've read tons of your post and I would be greatful for your opinion. I know the final decision wil be up to me. A point in the right direction would help alot.

Thank you.

JGS basic turbo kit has a manifold, turbo, and down pipe. The turbo comes in 2 trims, you'll want the one that has a T3/TO4E with a 50 trim compressor and a .48 AR exhaust housing. That turbo, IMHO, is the perfect match for the KA. You can also get that whole kit for a little more then the price of a GT type turbo

http://www.jgstools.com/turbo/index2.html

[GTR PrYdE]

So, WD, should I go with the GT3071R or look into a T3 set up like Biggie and GTR PrYde suggested? I've read tons of your post and I would be greatful for your opinion. I know the final decision wil be up to me. A point in the right direction would help alot.

Thank you.

JGS basic turbo kit has a manifold, turbo, and down pipe. The turbo comes in 2 trims, you'll want the one that has a T3/TO4E with a 50 trim compressor and a .48 AR exhaust housing. That turbo, IMHO, is the perfect match for the KA. You can also get that whole kit for a little more then the price of a GT type turbo

http://www.jgstools.com/turbo/index2.html

+10000

I run the JGS kit, great combo. You'll need to get creative with the hotside piping, an SR FMIC kit will work ok for the rest of the parts.

[lonnie808]

Sounds like a good idea. I'm trying to do this in one shot. Not to fond of trial and error when it comes to my cars. I'm going to look into the JGS kit to see what else i have to get and to see what I have to sell. I keep you guys updated or post a build thread.

Thank you!

[WDRacing]

Your Avatar is The Avatar...

[lonnie808]

Your Avatar is The Avatar...

Yeah, dude's a bad a** in the "Avatar state".

[WDRacing]

The only thing that would have made that show better would have been nudity

[GTR PrYdE]

Sounds like a good idea. I'm trying to do this in one shot. Not to fond of trial and error when it comes to my cars. I'm going to look into the JGS kit to see what else i have to get and to see what I have to sell. I keep you guys updated or post a build thread.

Thank you!

Trail and error is exactly what you'll encounter with Intercooler piping... just a heads up,

FWIW, I used an SR kit. I used the whole SR cold side(added some length to the center). On the hot pipe I used the lower piece only- then a 2", long silicone coupler (6-9") and a 2" L pipe. Then had the bov fittings welded on..

[D-UNIT]

I would go with your first choice. You can't beat ball bearing spool and sound. plus it will be the last turbo you buy for awhile because it can put out up to 480whp and it bolts right in. I have a HKS GT2530R (60mm comp 53mm turbne)on my KA and the only problem I have is with the internal wastegate and boost creep. I set it at 15 and it spikes to 17 not a real problem cuz its still at 74% effiency at that psi level. I honestly would have got that turbo size or bigger as my first if I knew better. Trust somebody that actually has one on a KA , you will not be dissapointed with the T25 3071. Its a bolt in 400+whp solution.

[s13drifter88]

id look more into a 2871 with a .63 hotside. it will spool faster and will easily do 375+whp on a ka plus it will be compatible with a lower mount manifold and u can still use a conventional style 5 bolt dump and silvia down pipe. also top mount will sit pretty close to the master cylinder and begin to heat the fluid. with a 2871 and a conventional lower mount setup it will allow for the use of a standard sr intercooler setup. the 2871 will let u keep things simpler which will make your project much easier and somewhat cheaper

[s13drifter88]

also an external wastegate will be required for a 3071 unless u trust an internal gate to that massive cold side. thats alot of air coming in to try to regulate through that tiny little flapper hole.

[GEO]

I found good results with a .48 A/R and 57 Trim on stage 5 wheel on a t3/t04b. Was spooling by 2800rpm on my ka24de

[s13drifter88]

i always liked the 2871 with the optional t3 flange. it spools SOOOOOOOO fast with that big exhaust inlet and doesnt choke the motor i mean even the rb25 t28/t3 is awesome for a 300whp KAT. its ceramic so i wouldnt push it past 12psi but itll make great power at that pressure