gt28rs vs 19T vs 16g: getting parts ready
 

So I'm coming up on the buildup for my stock 1.6. I have the parts ready to build a turbo manifold but I haven't decided on a turbo flange yet.

I currently have a stock wrx turbo that probably needs a rebuild, but I'm going to upgrade it to a 19T or just get one of the 16g variants from Blouch Turbo, depending on the price. The good thing is that once the turbo setup is built around the wrx turbo, any turbo from Blouch will fit right in.

I have the chance to get a gt28rs with the .86ar for ~$500 with a welded wastegate flapper, so after all is said and done going back to an internal gate, it'll be about the same price as the wrx turbo setup.

I'm building the car for track duty, but it'd be nice to have some midrange grunt for low-speed hairpins. It'll also be a street car on occasion, so take that into consideration.

I know the gt28rs is "too big" for street duty, but for the price, that's why I'm looking at getting it. Opinions on the 19t or 16g's?

Thanks for the help!

I wouldn't say a gt28 is too big for street use. Your stock 1.6 may have some trouble spooling it, but if you have a proper exhaust, decent manifold, and a good EWG, you could probably see decent spool before 4k.

Hustler is making 12psi at 3100 rpm of something like that with that same turbo. Then again, he has 1.9l and baller hotside parts.

sigh. the gt2860 is a small turbo. the 1.6L wont have trouble spooling it. can you guys finally swallow that yet?

gurgling now...

WOW. Maybe the grand epiphany is coming.

the only issue might be the .86, but there is evidence here against it.


specifically:
http://i295.photobucket.com/albums/m...otta-dyno1.jpg

What like the sudden realization that I've been using a journal bearing turbo that's larger than a gt2860 for 5 years now without trouble spooling it?

Nope. But every time I tell someone that the turbo they're looking at is too small, the peanut gallery comes in and tells me I'm the one who's nuts.

well, it certainly ain't too small for a 250-300rwhp goal at least.

Sounds good. I think I'll pick up the gt28. A lot of people told me on another project that a gt35 was too big for my friend's 99 integra gsr ... but he's hitting 10psi at 4krpm on a stock motor with integra type r cams.

Should I do a ramhorn style or log style manifold with an external wastegate or replace the exhaust housing and run the internal gate?

compare the b16 head to a bp.

Don't ignore the DSM 16g. You can buy them used dirt cheap. I've bought several for different projects and paid $200-300. It's a great street turbo for the $$. I don't know why you don't see people use them more.

Lack of a quality off the shelf manifold comes to mind. Unfortunately you cant smash a td05 center section into a td04 hotside, otherwise I expect we'd see it quite a bit :).

How does a 2860 compare to the 2871? I can read the specs, but this is where my knowledge really lacks. It's a 28 series. Are they considered comparable, or not even close?

the 2860 has a 60mm compressor wheel, the 2871 a 71mm.

*cough*you mean b18*cough*

im not honda smart.

honda are also capable of reving to 9k so full boost by say 4500 is more exceptable when you have that extra 2000rpms

60RS has a pretty limited efficiency range. It's tapped out around 35lb/hr (~320whp), but it's very efficient when you're in that 14-18psi range.

Attachment 201245

71R has MUCH more headroom, at least another 70whp. It hits a little bit harder than the 60RS but stays efficient at higher boost and power levels.

Attachment 201246

On a 1.9 liter, the 60RS will come on pretty smoothly and make big torque from ~3500 on. The 71RS will come on a tiny bit more abruptly, but it's capable of much more torque than the 60RS can dish out. Neither will have the instant response of a 2560, but the 2560 can't produce a torque curve like a potato is capable of.

If you want 300whp and no more, get the potato. If you want 350whp+, get the 2871R. Either way, get the .86 housing.

I'd like to try a 2860RS .64 on a 1.6 - I bet it would be much better suited to the smaller motor.

This is with my China 2871 .64 at 16 psi with just an MBC. With my EBC I see 15 psi almost 500 rpm's sooner.

Attachment 201244
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Savington,
My 1.9 made 15psi at 4400rpm with the log manifold, it makes that at 3200rpm with the AF parts. If we're talking dynojet-hp, then I agree with a gt2860rs for up to 300whp, but you'll need more compressor if you want 300whp on a real dyno with a log manifold.