well since i have come to see that the 2.4 is tuneable...i have decided to pretty much make my own custom setup...which probably will take a long time..as i am somewhat new to turbocharging....what im wondering is...what would be a good size turbo for the 2.4 motor?....capable of handling aroun 300-350 hp

 

Garret GT30R, and Turbonatics T3 super 60 these are two good ones to look into.

 

theyl handle around 300-350 hp range?...and also theyre not to big or anything are they...wont cause any lag?...im gonna have to check out the site...havent had a chance yet...

ok well the gt3071r is definately adequate on power....with that stylke flange...could i just get the hahn shorty header and bolt it up to that?

 

Here is the link to Garrett’s page. The Garrett turbo should fit Hahns manifold becasue they use Garretts kit for the 2.4
http://www.turbobygarrett.com/turbob...30/GT3071R.htm

Here is the link to Tubonetics page.

http://www.turboneticsinc.com/turbo_overview.htm

 

a gt2871 will fit your power needs

 

^^^ a gt2871 is probably a better choice then the gt3071 for your target range.

 

ok well i was looking at the garrett turbos and i decided that a GT2871R or a GT3071R would both be good....even though they were reccomended above....i was wondering which would spool faster?...i assume the GT2871R would due o its smaller size?

 

Gt30 Ftw

 

if you go to www.turbobygarrett.com and go to their turbo tech section (section 3 i think), it takes you step by step through how to figure compressor sizing. as long as you graduated high school and have a calculator you can do your own figuring... more satisfying that way i think. at least read thru it and see what some of these numbers mean and where they came from. you said you were new to turbocharging, it is a good place to start learning

 

ROFL!

 

No need to spend big money on a GT series for 300-350hp. Get a good old T3/T04E 50 trim. Under $600 and good for 400whp all day long. You can spend the $600+ you saved over a GT on lots of race gas.

 

Yes the GT's will spool marginally faster, but people really OVERestimate how much faster BB turbos spool. You'll probably see 300rpm quicker spool max, which with turbos in the size you're looking really won't make much of a difference. If you were looking at 600-800hp turbos that extra bit of spool time could be the difference between you falling out of boost between gears or not, but the turbos you're considering will all be in boost at relatively low RPM so that isn't an issue.

Durability isn't an issue. Either BB or journal bearing will both last longer than you'll own the car if properly taking care of (turbo timed and diligent oil changes).

It comes down to what you personally prefer and what you're willing to spend. The GT series are excellent turbos and newer technology (not just because they're BB, everything is improved), but in the grand scheme of things you're paying twice as much for a turbo that isn't going to make twice the power. For a moderate HP setup like you're looking for, I'd recommend paying half as much and going with the 50 trim. It will make the amount of power you want with ease and save you lots of money in the process.

http://www.rogueusa.com/Garrett-T3-T...t-t3to4e50.htm

http://www.rbracing-rsr.com/turbo/TurboMaps/t04e-50.gif

 

would that be the better way to go?....which is better in terms of durability?...wouldnt the gt's spool faster

and by the way im not sure where you got under 600 hundred because when i check theirwebsite i see them all listed as starting out at $1022

 

What website are you looking at? Check the one I posted, that's where I bought mine.

Whoa, crazy post order mix up batman!

 

i dont know never mind...lol....well should i spend the extra money for a ball bearing or just stick with a journal bearing?

 

IMO it really isn't worth the extra money. Just ask yourself if spending the extra $450 or whatever to upgrade to BB is worth seeing full boost at 3,500 instead of 3,800, when you're never going to see either of those RPMs during a race.

 

dont th eball bearings last longer and keep cooler?....and wouldnt they spool up closer to 3000 instead of 3500-3800?

 

my uncle has 3 t4's laying around

ryan.

 

No there isn't anywhere near that much of a difference in spool time, same turbo to same turbo.

I see full boost (26psi) on my 2.0L with a tubular bottom mount at 3,900rpm. My friend with a CRX and the same turbo, but his is BB, sees full boost (10psi) at 4,500rpm on a 1.8L with a top mount. Other friend with an SRT-4, same turbo, non BB, sees full boost (23psi) at 3,900rpm on a 2.4L and log manifold. Moral of the story? There's 923849238423 different things that effect spool, manifold design and head flow being first and foremost (aside from displacement obviously). But with a 2.0L and a journal bearing T3/T04E you can expect to see 15psi by <3,400rpm and 20psi by <3,700.

Will they last longer? That's debatable. Supposedly they do, but we're talking the difference between lasting 100,000 miles and 120,000 miles, does it really even matter?

Do they run cooler? I've near even heard that considered. I guess it would go towards durability which, like I said before, is irrelivant.

If you are that concerned about super long term durability, keep in mind that BB turbos aren't rebuildable. They blow a seal, you buy a new turbo.

 

so then journal bearings are rebuildable?....and alsothere are 2 a/r's for the t3/to4 turbo.... .48 and .63...now i know the smaller the a/r the faster the spool..but which would i be better to go with?... .63 sounds reasonable

 

I agree completely with what AWD says. He has come from turbos like myself. Don't spend the $$$ on GT series when good ol' rebuildable T3/T4s will crank out the same HP for alot less money. If they die. They can be rebuilt. HP is HP whether it comes from a solid gold GT series or from a T3/T4. Plus you can mix and match T3/T4 housings and wheels to just about any configuration. Keep in mind, you are going to have alot of exhaust gas energy on a 10:1 compression ratio 2.4 VVT. That will spool anything REALLY well. So don't worry so much about spool but worry about sizing your turbine AR so you can keep making power to redline on these motors.

I don't think you would be dissastisfied with a .50 or .57 trim with a .63. Later spool but holds power alot longer.

 

well the only two offered are .48 and .63 on this turbo....which should i go with?

 

I PM'd you.

 

That's correct, .63 would be the better choice. A .48 would spool very fast, but it would also struggle to make the power you want. FYI, all the spool time examples I gave were with the .63 housing because that's what nearly everyone (and everyone I know) runs.

And another FYI on the cars in my example, on that exact turbo with the .63 hot side my personal car made 349awhp @ 23psi, the CRX made 351whp @ 10psi, and the SRT-4 made 377whp @ 24psi. I'd say that's about as close to the power range you want as you're going to get.

 

when it comes to fuel issues....would i need a fuel pressure regulator..?....and also does the flow charts somehow tie into the tuning?....do i need to learn how to read them or are they just kind of there to see that turbos specific performance capabilities?