markvqwerty

first i tried the search function but nothing showed up.

Did annybody try a garret gt28r on a stock b16? what nr's did you make?
thanks a lot.

mochasi

i also couldnt' find much wit this.. i'm going with a gt28rs with t3 housing with my stock b16

markvqwerty

a rs is bigger than a r.
i think everybody will say that a gt28r is to small but i tryed to calculate the compressor map and if i do this id say that any to4e is to big and that a gt28r is perfect.
but i think that a b16 has got more exhaust flow than a normal 1.6l engine.
so much for calculating compressor maps!
annybody got any dyno sheats of a gt28r on a b16?
thanks

markvqwerty

annybody?

Def

It's an ok turbo if you don't want much power. It'll probably max out around 280-290whp on a B16. No idea what pressure that'll be at, but it'll do about 290-300rwhp on an SR20DET at maybe 16 psi or so(lower revving 2.0L engine). It's an "OEM sized" compressor, so you won't make 300+whp at 6 psi of boost or whatever you crazy Honda guys do with T67 compressors and whatnot.

The GT28RS will peak at about 300-320whp, and 320 is really pushing it with that thing, like close to 18-19 psi on an SR20DET, which is a lot.


I say the exhaust turbine is a bit large on both these turbos at 0.86 A/R, but you Honda guys seem to like that to get traction. I'd expect it to fully spool around 4.5k RPM on a B16 at 10 psi or less, give or take a few hundred RPM.

If you really want a T25 based turbine, I'd strongly look into a stock T28 ball bearing turbo from an S15 Silvia SR20DET. They're all over eBay and I think cheapturbos has one. You'll need some inlet and discharge attachments for the compressor(they bolt-on, OEM stuff ya know, no coupler attachment points), but it's got a 0.64 A/R T25 turbine, dual ball bearing and a 300whp capable compressor. Excellent match, and you'll get awesome response on a 1.6L engine. It fully spools to 16 psi at around 3.5k RPM on an SR20DET. Expect around 4k RPM or so with your engine.

5thgencivic

We just tuned my stock B16 with a GT28R on it today. I really like the powerband. It still has great top and spools quick. I see full boost of 10psi by ~3500 with a 2-2.5" downpipe and equal length mani. Once vtec engages it's over

I'll throw it on the dyno one of these days.

projectPSI

take a look at the edelbrock tubo kit numbers. they have em for the b16's using the gt28r and they also have open track kits with gt28rs's. you can get soem base numbers from the dynos they ahve from their kits.

poid

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by markvqwerty &raquo;</TD></TR><TR><TD CLASS="quote">a rs is bigger than a r.
i think everybody will say that a gt28r is to small</TD></TR></TABLE>

thats cos most people like to use large turbos for the sake of using a large turbo instead of matching it to their needs

I use a GT28R on my accord, 10psi of boost from 2,500rpm is brilliant on the street IMO

markvqwerty

i guess the calculation of compressor maps isnt correct on a b16 than!
according to 5thgencivic the gt28r wont make it past vtec point and if i read the maps the gt28r would be perfect.

my goals are only max. 250whp @10psi so i figgured that a to4e would be to big. but if a gt28r wont make it than i dont know what to choose. thanks!

5thgencivic

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by markvqwerty &raquo;</TD></TR><TR><TD CLASS="quote">i guess the calculation of compressor maps isnt correct on a b16 than!
according to 5thgencivic the gt28r wont make it past vtec point and if i read the maps the gt28r would be perfect.

my goals are only max. 250whp @10psi so i figgured that a to4e would be to big. but if a gt28r wont make it than i dont know what to choose. thanks! </TD></TR></TABLE>

When I said it's over, I meant it pulls like a mother. No traction in first or second, with the B16 LSD tranny. Pulls hard all the way to 8 IMO this turbo is an excellent choice for a stock B16 if you are looking for ~250-300 whp. That's all I'm looking for and it feels great. If you want to pay a little more for the rs that could be good as well. We were doing 4th gear pulls tuning it also, so boost does come on sooner in the higher gears.

I should have some video footage up in a few days.

markvqwerty

oops my mistake!
did you buy it from injected performance?
the 60trim 0.6a/r?
what psi is the wastegate set?
problems with boost spike/creep?
please let me be the first to know what nr's you are making
btw what mani are you using?
cat?
thanks a lot!

5thgencivic

No, I bought it used on h-t here. It's the standard GT28R like on atpturbo. I never checked to see what the wastegate was set at. The consensus on here seemed to be it is ~6psi. We just put a homemade MBC on and tuned for 10. No boost spike or creep. I just pulled the downpipe off and redid it today to 2.5" all the way(instead of 2-2.5"). Ported the flange and bent the pipe to fit it. So we will probably retune again tomorrow I'm using an equal length mani. No cat. I should have a post up tomorrow with specs and pics. peace.

Nate

markvqwerty

how much did you make on your first tune?
good luck!
happy newyear!

5thgencivic

Didn't get to the dyno yet. We just street tune. Happy New Year to you as well

Def

A GT28R will do 250-300whp pretty easily. It might pull off 250whp at 10 psi due to how well a B16 breathes, but it'll be close to it regardless. I imagine 300whp will require more like 14-16 psi depending on how well your engine breathes and your tuning.

Is this the turbo you guys are talking about???

http://store.yahoo.com/cheapturbo/garrettgt28.html

That's the only GT28R I've ever heard of, and it has dual ball bearings and a 0.64 A/R turbine. It's the S15 Silvia stock turbo - maxes out around 300whp.

The Garrett T28 on that site is the Pulsar journal bearing 0.86 A/R turbine that IMO is a bit of a mismatch on engines smaller than 2.0-2.2L(depending on how high they rev) or so.

markvqwerty

yep thats the one! and im only aiming for max. 250whp since its stock.
and ill think ill choose this one over a t3to4e.
let me know what the dyno does!
thanks

Def

Just get the compressor intlet and exit flanges - otherwise you'll have to fab something up. No way to get a hose coupler on them. Might make the intercooler piping and intake stuff a bit harder to do on your car(since they aren't straight fittings). The compressor inlet goes in at about a 45* angle real close to the compressor and turns in, then the outlet curves up about 90*. Hard to describe, but search for some SR20DET turbo pics and you can find one with the flanges attached and see what I'm talking about.

If you can weld, you can make your own flanges easily.


I think you'll really like the turbo, it's still pretty efficient at 250whp, and honestly, a 1.6L engine on slightly higher boost probably puts it at a better place on its compressor map than slightly lower boost on a 2.0L and more mass flowrate. It'll spool up quick. I'll be surprised if you don't have full boost by 4k RPM.

markvqwerty

yeah thanks i think ill work but i dont think that 300whp is going to be easy with that turbo cause its rated 33hp max and that will only happen when the b16matches the turbo perfectly. but i would be happy with 220-250whp @ 10psi.
btw 5thgen. whats the brand of your mani cause i only found the hks mani for a t25.

markvqwerty

btw i got a email back from cheapturbo and they say that a gt28r has got a too small turbine that will prob. choke @ higher rpm.

JonnyCoupe

gt28R will spool by 3k easy.

I had a Sunny GtiR T28 on my b16, with a 0.82 A/r hot side, not even BB but boost by 3k and held power to redline.

markvqwerty

have you bin on the dyno?
what numbers did you make @ what psi level?

Def

With the slightly higher flowing GT series 53.8mm turbine wheel this housing has supported 370rwhp on an SR20. It doesn't seem to be too hard to get it up to 330-340whp with this turbine really.

This is the OEM stock turbo on S15 Silvias, and they are rated at 247bhp. That's like 220-225rwhp, just slightly below your power goals. The turbine will not even come close to "choking" the flow at that power level. You might pick up ~5whp at the same boost level with the 0.86 A/R turbine housing, but you'll spool about 400-500 RPM later on a B16. I really don't think you'll have a problem hitting 250whp with this turbo, but it might come a little over 10 psi.

I highly doubt a B18 can "fully spool" a GTiR 0.86 A/R turbo by 3k RPM. It takes an SR20 to 4k RPM to do that. Of course, if you're running something ridiculously low like 5-7 psi, then yea, it might do it by 3k RPM in 4th gear on a dynojet.

markvqwerty

330-340whp with a gt28r? sure its no gt28rs or gt2871???
btw 5thgencivic any news yet?

JonnyCoupe

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by markvqwerty &raquo;</TD></TR><TR><TD CLASS="quote">have you bin on the dyno?
what numbers did you make @ what psi level?</TD></TR></TABLE>

Didnt get it on dyno, totalled the car 10 day after install

DefiantGSR

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Def &raquo;</TD></TR><TR><TD CLASS="quote">With the slightly higher flowing GT series 53.8mm turbine wheel this housing has supported 370rwhp on an SR20. It doesn't seem to be too hard to get it up to 330-340whp with this turbine really.

This is the OEM stock turbo on S15 Silvias, and they are rated at 247bhp. That's like 220-225rwhp, just slightly below your power goals. The turbine will not even come close to "choking" the flow at that power level. You might pick up ~5whp at the same boost level with the 0.86 A/R turbine housing, but you'll spool about 400-500 RPM later on a B16. I really don't think you'll have a problem hitting 250whp with this turbo, but it might come a little over 10 psi.

I highly doubt a B18 can "fully spool" a GTiR 0.86 A/R turbo by 3k RPM. It takes an SR20 to 4k RPM to do that. Of course, if you're running something ridiculously low like 5-7 psi, then yea, it might do it by 3k RPM in 4th gear on a dynojet. </TD></TR></TABLE>

I'm pretty sure the s15 comes with a ball bearing T28..not the same turbo?

That's what my nissan brother told me.