Wo-Nelly

With a greddy 18g b16 kit, what can you upgrade the turbo to without changing too much. I was hoping for something bigger that will support ~350whp and is a direct bolt on to the manifold and dp. I've searched but didn't come up with much, also where can you buy just the turbo. It's a t25 turbing housing correct? Is the t28 housing the same?

boostincoupe

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wo-Nelly &raquo;</TD></TR><TR><TD CLASS="quote">With a greddy 18g b16 kit, what can you upgrade the turbo to without changing too much. I was hoping for something bigger that will support ~350whp and is a direct bolt on to the manifold and dp. I've searched but didn't come up with much, also where can you buy just the turbo. It's a t25 turbing housing correct? Is the t28 housing the same? </TD></TR></TABLE>

You shouldn't have bought the Greddy kit if you were planning on more than 350whp. Planning, planning, planning.

I don't know which turbos bolt up to the Greddy mani, search it up. There's like 5 threads a week.

TurboJesse

Im not too sure, but can't the 18g push 350whp?

MikeMAN

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Mpir3 &raquo;</TD></TR><TR><TD CLASS="quote">Im not too sure, but can't the 18g push 350whp?</TD></TR></TABLE>

you betcha, i was talking to a former hahn racecraft engineer (just opened up a shop) and said the smaller 15g can do 300whp also, so i would assume the 18g could do 350 with not TOO much work...

mike

Wo-Nelly

Well this one seems to spike to 21psi and then back to 16 and would stay there and that only made 250whp at most. This is on a B16, maybe on a different motor it can make 350whp but I'm thinking I'd be better off finding a larger turbo

MikeMAN

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wo-Nelly &raquo;</TD></TR><TR><TD CLASS="quote">Well this one seems to spike to 21psi and then back to 16 and would stay there and that only made 250whp at most. This is on a B16, maybe on a different motor it can make 350whp but I'm thinking I'd be better off finding a larger turbo</TD></TR></TABLE>

probably be the best bet for ya to just get a new one, makes it a lot easier.

mike

grndcont

20g might work.

p0gi

why not just have the turbine clipped. According to greddy the turbo is good for over 400 crank hp.

JalopySiR

There really are just WAY too many of these posts a week. Yes, the turbine housing is a T25. Please search, I have answered this question like 6 times this month already. Not kidding.

Wo-Nelly

I did but most posts were about sohc 16g upgrades which leads to greddy's dohc 18g kits and thats it. Whats after that?

TheShodan

iTrader: (14)

No the turbine housing is not a T25, it is a an 8sq. cm similar to a T3, yet slightly smaller. Because of the larger compressor cover, it is possible to take the turbo apart and upgrade both the turbine, and compressor sides to accomodate for larger sizes. The one thing that you have to be careful of, however, is to make sure that you get the internal wastegate flapper (located on the inside of the turbine) so that it is larger than the 32mm that comes standard. It can be ported and using another flapper so that it can take additional boost, and go to about 25psi. That's why it seems as though it spikes and settles back down, when you boost high.
The 18G Greddy spec turbo is a bit different than most "18G" from the mitsubishi, and has about 640cfm. It contains the quick spool of the 18G, with the turbine trim and size of a 20G. That is why it is not a T25 flange. GREDDY makes their turbos VERY specific.


A lot of this can be done, and there are several resources that are able to rebuild to those specs. One place is TURBOCHARGERS.COM, which is an authorized Greddy repair and REBUILD facility in Houston. It may cost a few bucks, but less than a new turbo.

Bulldogg83

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Wo-Nelly &raquo;</TD></TR><TR><TD CLASS="quote">Well this one seems to spike to 21psi and then back to 16 and would stay there and that only made 250whp at most. This is on a B16, maybe on a different motor it can make 350whp but I'm thinking I'd be better off finding a larger turbo</TD></TR></TABLE>

spiking issues are due to the internal wastegate....had a similar problem with the td05-18g when I had it on my b16...made 275whp/216 ftlb of torque @ 13lbs, but every now and then I would spike to 15-16lbs, but that was b/c of the internal wastegate....

ProEater

i heard the 18g isnt supposed to be boosted over 13 lbs. just upgrade the mani/turbo/dp

Bulldogg83

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ProEater &raquo;</TD></TR><TR><TD CLASS="quote">i heard the 18g isnt supposed to be boosted over 13 lbs. just upgrade the mani/turbo/dp</TD></TR></TABLE>

I was always told the the td05-18g is good up to 15-16lbs. Main problem with Greddy setup is the internal wastegate and not so much the turbo causing the problems..........

p0gi

the greddy turbo is a standard garrett t25 and not an 8cm2 housing. The dp flange is also a standard t25 5 bolt.

JalopySiR

Whoa, you really need to stop spreading any information at all. You obviously do not know too much and are going to contribute to the gross amount of misinformation that is out there concerning Greddy Kits.
[QUOTE=TheShodan]No the turbine housing is not a T25, it is a an 8sq. cm similar to a T3, yet slightly smaller.... .....It contains the quick spool of the 18G, with the turbine trim and size of a 20G. That is why it is not a T25 flange. GREDDY makes their turbos VERY specific.
QUOTE]
This right here is about 99%wrong. The turbine housing IS a T25, yet it is measures in CM2. O.K. the next thing, 18G, 20G, 16G, whatever, has nothing to do with the turbine size, housing or hot side at all. It is the compressor size. period. You were right about the hot side being slightly smaller than a T3, tho. T25 is the next step down. As I tell everyone about these turbos, if you need more information P.M. me, I'm glad to help. Just don't help anyone alse out until you know what is correct yourself.