closest holset equivilent to a gt35r t4 flanged
 

?

Re: closest holset equivilent to a gt35r t4 flanged
 

You're looking for something that spools late and makes medium power?

60-1 with a P-trim wheel and .96 AR turbine

Re: closest holset equivilent to a gt35r t4 flanged
 

HX-40.

Re: closest holset equivilent to a gt35r t4 flanged
 

That makes more than 550 whp. He's looking for an HX35 that spools sluggish.

Re: closest holset equivilent to a gt35r t4 flanged
 

I just gave him size to size, t4 flange. HX-40 is a touch smaller on the compressor, and bigger on the exhaust, but t4 flanged it is the closest in size.

Re: closest holset equivilent to a gt35r t4 flanged
 

HX40 flows a lot more than GT35, in truth HX35 is on a par with it and 60-1.

You can get T4 flange HX35, or at least you can buy bolt on housings. IIRC the smallest comes in at 19 CM^2; I asked Jaymez at Diesel Injection Service in Cinci about it once and that's what he came up with for me. I think that'd spool about like a GT35.

Re: closest holset equivilent to a gt35r t4 flanged
 

Re: closest holset equivilent to a gt35r t4 flanged
 

You can get a 16cm T4 flanged hot side. Now not stock on an hx35, but there were a few hx40's like that.

Here are some interesting things to note:

Hx-35
Specs:
Compressor cover- 4" intake and 2.5" out.
Compressor wheel - Inducer: 56mm, Exducer: 81.8mm
Turbine wheel - Inducer: 60mm, Exducer: 69mm

GT3582R
Compressor cover- 4" intake and 2.5" out.
Compressor wheel - Inducer: 61mm, Exducer: 82mm
Turbine wheel - Inducer: 62mm, Exducer:68

The imho the reason that the HX-35 makes power like the GT35 is 2 reasons
1) The big turbine wheel.
2) Higher efficiency at high boost

Now if you want the closest specs inducer to inducer an HX-40/35 hybrid would fit the bill.

Re: closest holset equivilent to a gt35r t4 flanged
 

Inducer vs inducer isn't a very fair comparison, especially since the Holset has a larger exducer meaning it's higher boost efficiency is through the roof.

Neither is turbine size a good comparison, exactly. It's a good indication of how much a turbo will choke an engine, but the HX35 spools a little better than a GT35 on the same engine.

There's a lot of good design on the Holsets. If they upped the inducer diameters to suit gasoline applications then they'd be true baller turbos.

Re: closest holset equivilent to a gt35r t4 flanged
 

I realize that inducer to inducer isn't even close to relevant, but it is a well published internet way of sizing things... :8

If we want to complicate things further here are three different hx 40 compressor wheels.

Starting with the 8 blade compressor wheel
Attachment 10444

Then the 7 blade
http://i23.photobucket.com/albums/b3...7bladehx40.jpg

Then the 6 blade
Attachment 10445

To make matters worse there are at least two turbine wheels for the hx40 as well, a standard 12 blade, and a higher flow 10 blade. I have specs for these at home, but alas I am at work... So if beer doesn't over take me I will post those up as well. :1