Balor_Gr

(We are talking about the second map)


Ok a quick google search will reveal its a strange combination of 3076 and 3071
Its compressor inducer is 53 mm and exducer 76mm
Comparing to 3071 that has 53mm inducer and 71mm exducer
and to 3076 that has 55mm inducer and 76mm exducer

Imo it looks VERY good on paper. Beeing 2mm smaller inducer should spool faster from 3076 giving the same top end with
better surge line. The only place its worse is on the super high or super low pressure ratio that honda engines dont need at this turbo size.

In my eyes it looks perfect for the average joe's B16,B18 on the stock head ports with GSR/ITR cams.That will require 17 to 35 psi to hit 500 to the crank.

Anyone has any real data on how this oldie performs?

TheShodan

iTrader: (14)

Sure. This turbo has performed quite well over the last 15 years or so for the B series engines, specifically the b18c.

500 crank wheel horsepower is about 414 horsepower to the wheels. It definitely does not take 35 PSI in order to reach that point. You will be on average about 17 to 21 PSI depending upon other factors, including intake manifold, intercooler, tuning preferences, Etc. This turbocharger is about 50 lb per minute, using the n111 60mm turbine wheel. That's like using a T3 /T04E "50 trim" with a little extra punch up top.

there are definitely several Alternatives that can do even better with that particular platform in about the same price range, however it all depends upon availability in your area and whether or not you are willing to look outside of that. The only problem that I have with the older gt3071r, is the fact that uses such a large compressor cover. That is actually what hurts that turbocharger's utility a bit more. It's a great platform to start off with, but I know that there have definitely been some improvements made with that particular system over the years since it has been created. If you're extremely budget-minded, it can still work. But there are definitely several other alternatives in the GT(X), G25, and other 3rd party Garrett creators that have taken that platform as a base and made it much easier to reach quicker responsive advantages than what the gt3071r has to offer.

Balor_Gr

I had to read it twice haha.
But a little bit more confused.
So its a 3071 not a 3076. I guess it was named 3076 due to compressor exducer only.
Well i can get this turbo for like 1100 eur here at europe.
I like my turbos turbine heavy with small a/r and i like to TRY things.
Ill make another post on turbo selection cause as it is now ill probably sleeve the engine.

TheShodan

iTrader: (14)

That's not new to try.. We've done that for years. (Only in recent years have people finally caught on)
There's heavy, and there's TOO heavy. ( you're fine with that exhaust wheel, btw).

You asked, we're telling ya. So go get it.. Sleeveing the block doesn't change your choice.

Balor_Gr

Yes i might try the "too heavy" route too.
I asked Kalle from KKD motorsports if he can machine a hx40 60/85 comp 65/76 turbine with an 8cm and he can do it. Final price 800+ shipping.
Changing my turbo will happen because that td05 is too small for the darton sleeves investment haha.
If i was at the statew i'd definately get a custom turbo from you but you know +35% customs...
We will see.

TheShodan

iTrader: (14)

That N111 Turbine wheel is not by any means "heavy" for a B18C1 engine. These engines are just not in the same category as our older 4G63 and EJ20 brethren that uses much less efficient cylinder heads. So, depending upon which wheel was in the TD05 you were going to use (which was about the size of a 54mm GT28 series wheel anyway) you weren't too "heavy" at all with this engine.

Now, with that said.. I did a little digging as well as that part number just seemed really odd. It turns out that this one from TM Motorsports uses a 55mm inducer / 76.2 exducer and not the standard GT3076R using a 57mm inducer / 76.2mm exducer, which makes this a 52 trim and not a 56 trim, in a T04S Standard cover vs. the Ported-shroud cover. This is nothing like the GT3071R turbos that used a 53.1mm inducer / 71mm exducer, that used the 60mm N111 exhaust wheel. This means that you're not really going to get much feedback in terms of use outside of the U.S., because the CHRA that BTP Performance, TM Sport (turbosbytm) and other U.K/Aus Garrett distributors are using is different in its compressor wheel. We don't have it, and won't get it, so.....


How I found out was really their own catalog of older and new CHRA and Assembled part numbers and cross-referenced them with the database at my disposal which has almost everything since 2009 in the U.S. , Europe , and Japan..

So what they're using is an older GT3076R CHRA number ( 700177-5018S ) that uses the newer part number from a GT3076R (836000-5008S) , which seemed to be the 55mm variant that was offered only in the U.K and Australia using the larger compressor cover (after some cross referencing) and they have started to discontinue this part number as of about last year according to my information. It's all a cast wheel, and it's got some funky characteristics (slightly smaller inducer for a higher rotational speed, but in a BIG T04S cover? makes no sense aerodynamically, but whatever).

That still seems to be better than what your boy is trying to do with this holset thing.. (hx40 60/85 comp 65/76 turbine with an 8cm). That's a case of using too big & too heavy a turbine. You'll lag like no tomorrow with this combination. Forget the price, it puts you in an entirely different direction, like more drag race, and less acceleration. :sad:


You were better off with your U.K. based GT3071/GT3076R weird combo you were willing to check out for $1100. It would have at least responded a bit better with clearly enough exhaust wheel for your engine, sleeved or not.

Balor_Gr

I was sure something was wrong about that 3076 version. And you are correct that 0.7 a/r compressor might make things bad.If it had small housing it would be agood medium between 3071 and 3076 but what ever.