High Flowing Turbos

[chiksluvit]

One thing that has been lingering at the back of my mind since I've had my GCG 5 years ago (no longer have that turbo anymore) was- I have read in other threads back then discussing the Garrett 7 blade compressors, they were a very old design, and not really responsive compared to the more modern 6 blade etc. those topics were referring to other Garrett turbos like 3040 etc

Since GCG highflows are 7 blade as well, and likely to be using Garrett parts, does the above re Garrett 7 blade apply?

Edited November 17, 2014 by chiksluvit

[scotty nm35]

The main issue is the GCG Garrett cores don't seem to like being shoved into small housings and boosted hard, I suspect high manifold pressure increases thrust load on the bearings to the point of early demise. The M35 Stagea ones they made all had wicked bearing whine in no time. The moral of the story should be to keep a Garrett chra in Garrett housings for best results.

Added to the fact Hypergear's SS2 billet compressor highflow wipes the floor with GCG's offering for half the coin... I just don't see the point just to retain a BB cartridge, it is impossible to tell the difference between a good bush core and BB's these days imo.

Hypergear can of course make BB and ceramic BB cores if you are keen, but I am more than happy with the ss2 bush core in my evo.

[hy_rpm]

Scotty nm35

The ss2 evo highflow needs a new larger turbine

I end up sending back my evo slss2 turbo and sourced my own o6h4 turbine off eBay America for hypergear to fit

Made it 500rpm more responsive and a lot more torquier down low and cracked 303awkw on 28psi on rigoli dyno

Edited November 17, 2014 by hy_rpm

[scotty nm35]

So there is more in it? I have a 2.3 and can't see how it could make any more torque down low, it is very strong off boost already. I will speak to Stao about it, I only just got it up and running but I am impressed with it so far, 260 at 20 seems pretty good, the response is excellent so far.

[hy_rpm]

Stao was going to order a few of these turbines to keep instock

[scotty nm35]

I'm just a little worried about enlarging the turbine, as I have 6psi at 2k atm.

[hypergear]

Funny the L2 reversion wheel is actually too small for the evo. That looked like a reversed TD06H turbine which worked out even better, they must got a well flowed head from factory.

[scotty nm35]

I assume it would depend what rear housing it's stuffed into as well Stao.

At least the turbo is easy to remove on the evo. lol

[hy_rpm]

Is your highflow still using the evo 7/8

9.8cm rear housing ?

As you will need atleast a std evo 9 10.5cm rear or it will choke it up top especially with you stroker

[scotty nm35]

Yes, somehow my 7 had a twin puck 10.5 rear which Stao machined. I am mighty impressed with it so far, lets see what it can do once i get the coil packs fitted. Needs moar spark.

[hy_rpm]

Must of been a evo 6 td05 as they used the older style twin puck int gate 10.5 cm rear