discopotato03

Hi all , we are interested to know which has the more effective comp wheel ie the 3071R's 71.1mm 56T or the 76.2mm 52T . The feedback I have was that the 3071R was not the be all that ATP suggested when it first appeared . Both compressors I think can pump the same volume of air (comp housing A/R depending) though I suspect the 71.1mm wheel needs greater revs to do it so is fussy about turbine housing A/R . Is it fair to say that the 3037 52T is a better thing real world ?

Thanks , Adrian .

BTW by GT3071R I mean the real one not the GT3071R-"WG" lump .

TheShodan

iTrader: (14)

Boy, you sure love to start these, don't you discopotato03.. It depends upon the purpose used on these turbos. The GT3076R (different than the actual HKS GT3037R uses a slightly different compressor wheel and trim) is more popular and used in the states than the GT3071R, which is more popular to use in Europe and Japan because of much more circuit racing in which transient recovery is more of a focus than "flow" and all-out power. I'm not EVEN going to get into this particular discussion. It's going to just turn nasty after a while.

discopotato03

Look the reason I ask is because HKS turbos have always been prohibitively expensive here in Australia yet for reasons best known to them and Garrett some GT BB options are not marketed by big G at affordable prices . Most here are not prepared to pay 3-3.5 grand to have the High Kost Spec tag on a tarted up $1700A Garrett turbo .

We are finally going to get the GT3037 52T (really just a GT3076R 52T) at a sane price down here probably in the same ball park as the real GT3071R . So you see I ask because myself and others don't want to have to try both if there is a superior unit - would rather go straight to it .

The spec we are getting is basically the same as the GT3076R 56 trim but with the 52 trim GT37 wheel (BCI-18C family) . Ours will have Garretts T3 flanged GT30 turbine housings which are manufactured here interestingly .

Cheers A .

discopotato03

Forgot to add ALL GT3037 and GT3076R cartridges are the same except for compressor wheel trim . What you call the "GT30R" uses a GT37 56 comp trim and the only version sold to the masses by Garrett . HKS however marketed 48 52 and 56 comp trim versions and called them GT3037 (GT30 turbine with GT37 series compressor) .

TheShodan

iTrader: (14)

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by discopotato03 &raquo;</TD></TR><TR><TD CLASS="quote">Forgot to add ALL GT3037 and GT3076R cartridges are the same except for compressor wheel trim . What you call the "GT30R" uses a GT37 56 comp trim and the only version sold to the masses by Garrett . HKS however marketed 48 52 and 56 comp trim versions and called them GT3037 (GT30 turbine with GT37 series compressor) . </TD></TR></TABLE>

Correct. I'm not disputing this particular point, since they do share the same cartrdige, but just a cartridge alone does not a GT3037 make. That is why they have the different designations. I think we are making the same point albeit differently. The GT30R designation is just a way that is easier to identify to many people, and in the U.S. it is somewhat automatically implied that GT30R=GT3076R, which we know is not always the case.

What it seems like you're stating in this last post is based a lot on Marketing, no different than why it took 10 years for the Mitsubishi Evolution to finally reach the U.S., when the rest of the world received the car since 1992, and why Lexus is Toyota is Scion, and why everyone else get the wonderful Skyline, and the U.S. gets stuck with mediocre crap, etc, etc. Availability and marketing. In many cases regardless, the customer still loses in the end when it comes to what they want.

We get the same (excuse the pun) "shaft" here when it comes to HKS turbos and their huge expense cost. This is why not many are used here, due to the availability of the Garrett equivalent.

The GT3071R is a different turbo, period. The one most available to the states uses a different exhaust wheel trim and exhaust wheel exducer measurement, (though there are some variations available that have the same wheel trim, diameter, and exducer as the GT3076R, except in an internal wastegate housing and A/R...It is just not that readily available). It is more popular for some of the factory-induced 2.0litre motors that still want to use the same frame flanging system (T2 based) internally-wastegated system, due to ease of installation, and a bit more mid-upper powerband in order to let that motor stretch its legs a bit. The GT3076R, obviously due to its different design, is going to have a much higher midrange powerband for those that have a slightly higher VE and redline set, like the Honda VTEC motor.

My only point in saying that asking "is this thing a better one in the real world", cannot be a question answered in theory, only by one's interpretation and "feel" of that application for their use. It only opens it up to posts that say "my GT30XXXR does this at XX Rpm, and I love it!!". Which is not to say that's a bad thing, but you may not get the in-depth responses that you seem to like from your other thread topics.

I'm not at all attacking you, I'm just saying that you're about to open a can of worms

discopotato03

Yes I do like in depth feedback because the principles surrounding things that work are not pie in the sky guesstimations .

With the "GT3071R's" we are in the same boat , we also get the WG versions with the cropped turbines . We also get them with the butchered GT28 turbine housings which Garrett in your back yard admitted is a flop . The real one with the same turbine as the GT3076R is a rare bird here .

Going back to the 76mm 52T comp vs the 71mm 56T comp I would have thought that someone over there would know which compressor gives the best all round result . As far as recreating a HKS turbo goes all thats missing is the turbine housing (can buy they anyhow) and the compressor housing inlet insert (avail on e bay) .

Cheers .

spoolin turbo s

anyone know anything about the .48 variation of the 3037 as i have never heard anything about it other than a subaru guy telling my it was peaky and mismatched

ive never seen anything else about it