RX-Heven

iTrader: (1)

Anyone have any info/experience regarding this turbo from Garret?
Dubbed the Big Kahuna by Garrett, the specs of the turbo are:

67-1 comp wheel
TO4S comp housing .7 a/r
Divided T4 tubine housing .96 a/r
p-trim

Comments welcome

BigIslandSevens

iTrader: (4)

That is MY propriatary turbo design!! I came up with it! Garret stole it!!

Sorry , couldn't resist the "Big Kahuna" Reference, I actually haven't seen anything about it, But i have not been looking at turbos lately either. Sorry for the waste of time. Just screwin around

FD Rey

So it's a T04S turbo with a 67-1 wheel. All you're really paying for is the compressor wheel. You're getting just as much lag from that turbo as you'd get with a PT66 or PT67 and not as much top end power.

SPOautos

You have any info on the 67-1 wheel? Compressor map? Dyno chart? Or anything showing the "top end power" between that turbo and a PT66 or PT67?

My understanding is this is a low boost wheel, it is supposed to be a awesome wheel for 22psi and less and be pretty responsive due to good flow at low boost.

RX-Heven

iTrader: (1)

I am not planning on boosting more than 17 psi ever so maxing out the turbo is far from a concern of mine. On the other hand, spool up time is as I roadrace the car and anything to help eliminate lag is a plus.

I know the pt66 and pt67's are undivided turbine housings. I know sizing the housing will do more to eliminate lag but if you can get that 'optimal' size housing divided, like with the 'Big Kahuna,' wouldn't that help with lag even more? The specs between the two turbos are very similiar as far as I can tell and the divided housing was/is an attractive fearture to the Big Kahuna.

Any more thoughts?

rx7tt95

Isn't the big kahuna a name that cheapturbos.com uses? It's my understanding that it's not even a real T04R compressor wheel, just something sized similar like a 68-1 (he didn't know off the top of his head). I've heard from a reliable source it's a fairly crappy compressor. They call it an T04R when it really isn't.

FD Rey

I meant to say top end potential ie: high boost.

RX-Heven

iTrader: (1)

They don't call it a T04R, that is a different turbo. It only uses the comp housing from the T04R or T04S. The comp wheel is 66.5x mm.
Just about any Garrett dealer has the same turbo with the same name or at least can get one. Cheapturbos.com and others just get there turbos from the "performance distributors" listed on Garretts website.

I know a very reputable shop that uses this turbo in their kits and have great results with it.

rx7tt95

I'm specifically referring to this turbo, which is called the T4/T04R "The big kahuna":
http://store.yahoo.com/cheapturbo/garrettto4r.html

Carl Byck

Dave, I do not think this is the turbo foryou, I wrote an hour long post about this, and deleted it by mistake, call me... Basicly you want a PT67 .84 IMHO. Carl

RX-Heven

iTrader: (1)

I know you were. That turbo is sourced from Garrett Peerformance distributors, which they are not. Of course they can build one too, but I can get mine for the same price with a 3" v-band, polished comp housing and ceramic coated turbine housing.
I think the T4/T04R designation on their site is just to clarify the housing size, but who knows.
This turbo made almost 390 rwhp @ only 14 psi and 440 rwhp @ 17 psi on a ported fd. Plus it has great boost response as it was claimed to make 10lbs by 3000 rpm.

Shoot me a call Carl, I left a message.

rx7tt95

Ok, so the one you're referring to is from Garrett directly...and the cheapturbo version is something different?

RX-Heven

iTrader: (1)

They are both directly from Garret distrubutors, The one I am getting and the one at cheapturbo.com.

Here is a link from Garrett to the "performance distributor" I am getting the turbo from:
http://www.turbobygarrett.com/turbob...rbosDirect.htm
Nice guys to deal with btw.

FC Alex

Seems like this turbo would be a pain in the *ss. First off would be fitment because the turbine housing is divided not undivided like most turbo's on rx7's. Also who said that this will spool quick? It has a .70 a/r compressor with a 67-1 wheel... that has lag written all over it. The lag will be just as bad as a pt67, and personally I rather have a PT67. Simply put it's a better designed turbo. It seems to me that this turbo was made when people where f*cking around with housings and wheels and see what they could get. I'll try to find the link but I've read that the compressor wheel is not efficient and that's the reason it's not common.

NOTE this turbo would not be good for a road racer. You would be better off getting a gt35r, gt40r, or some twin set up. The major flaws I see for this turbo is too much lag and not enough potential... the turbo design cannot sustain high boost levels. So the question is wtf do you want lag if you can boost past 1.5 bar? I suppose the turbo would be ok for your average street racer. But IMHO it's not worth it, your better off getting either a smaller more efficient turbo or a something around the size of a GT66 or bigger.

BTW this turbo will have the ability to flow in 65-70 lbs/mins but expect to loss it's efficiency around 1.2 bar, meaning that this turbo was not designed for rx7's instead for bigger displacement motors looking for great efficiency at relatively low amounts of boost.

Alex