Holset Turbos, PART 4

[Mike1992]

Originally Posted by kicker91laser

Does anyone have an hx40 with a billet comp wheel? I have a 7 blade 40 here that looks like a machined billet wheel.

Received my Holset HX-40 today, mine looks billet as well

[turbotalon1g]

Anyone with these billet wheels have reviews? isn't this basically the same as FPs HTA and PTEs billet wheel turbos.

So even quicker spool on an already quick spooling hx40?

[JWoodley]

Originally Posted by turbotalon1g

Anyone with these billet wheels have reviews? isn't this basically the same as FPs HTA and PTEs billet wheel turbos.

So even quicker spool on an already quick spooling hx40?

The results should be consistent with the other billet wheels.


Fixed. Thanks Slippi. lol

[Slippi84]

Originally Posted by JWoodley

Shouldn't be any different.

Not true just like the HTA tech the billet wheel is lighter and more efficent and quicker spooling.
Forced Performance Turbochargers: GT3582HTA Ball Bearing Turbocharger

[JWoodley]

Originally Posted by Slippi84

Not true just like the HTA tech the billet wheel is lighter and more efficent and quicker spooling.
Forced Performance Turbochargers: GT3582HTA Ball Bearing Turbocharger

I was referring to the gains. It should've read "I don't see why the results would be any different than any of the other billet wheels."

[Slippi84]

Originally Posted by JWoodley

I was referring to the gains. It should've read "I don't see why the results would be any different than any of the other billet wheels."

Oh ok cool got ya I thought you were saying that the billet didn't make a difference I got ya

[JWoodley]

Originally Posted by Slippi84

Oh ok cool got ya I thought you were saying that the billet didn't make a difference I got ya

So when do we get a Holset sub forum?

[Slippi84]

Originally Posted by JWoodley

So when do we get a Holset sub forum?

You mean a billet wheel sub forum? This is the holset sub forum all 100000000 pages of it

[TxR6guy]

All these pages and i think there is only 15 ppl on this site running a Holset including me

[DoyoFCT]

So is it just luck of the draw to get a billet wheel in a holset? or is there a specific model that includes it. I'm particularly interested in knowing for the hx40.

Also does anyone know if holset or anyone makes a Divided T4 housing for the hx40?

[Slippi84]

Originally Posted by TxR6guy

All these pages and i think there is only 15 ppl on this site running a Holset including me

I just went back there are threads from 05 with people posting holset results. Juts because they're not posting doesn't mean they're not running them.

[ScottH]

Besides ebay, where is everyone finding Holsets? I am looking for a 6blade hx40 w/ billet wheel.

[dsm-onster]

Htturbo.com. Theturbotrader.com. Timsturbos.com.

Originally Posted by DoyoFCT

Also does anyone know if holset or anyone makes a Divided T4 housing for the hx40?

The t4 bolt pattern is standard for the hx40 frame. Twin scroll is also standard. As well for the h1e.

I've been talking to View Profile: darkhorizon - DSMtuners.com. He has an hx35 powered fiero 3.8L. He's going to shoot me a scan/log of 60lb/min airflow with his hx35. He's running the stock holset 12cm^2 turbine housing. I've posted the holset published map from the holset hx35W Product Information Brochure showing about .38kg/sec maximum flow:



This goes along with the other confirmed hx35 maps out there:



The hx30e-7755 is apparently the same 56mm 8blade compressor wheel and compressor housing as the hx35 as this map was given out from a cummins engineer:



Remember when we were saying that the holset website states that the hx35 supports .46kg/sec? Strangly enough, .46kg/sec is about 60lb/min. And I forgot that I had this old brochure (darkhorse reminded me of it because he had one too and showed me), Cummins Technologies Holset Frame Sizes. If anyone wants this brochure, pm me. There's not much there just the maps and the flow rating of the compressors and turbo external dimensions. There they state that the hx35 frame has an airflow rating of .46kg/sec, as well. Now on that brochure below is a series of holset maps:



Does the new holset hx35 with the 7 blade compressor flow more than 52ish lb/min? There was information on the web (it of course always is questionable), that the cummins engineers released two hx35 compressor maps. the hx30e-7755 and the 7765. The 7765 is big and flows right at where a 60-1 compressor, 57-58 lb/min at the edge of the map:

[dsm-onster]

Is the above too much to swallow? . . . In simple terms, the hx35 may flow as much an FPred but still of course spool faster than an evo3 16g; all the while with much higher efficiency at high boost. We don't know for sure of which compressor wheel holset gave up the above map. I'm leaning toward the 7blade 56mm wheel. There is a significant difference in flow between compressor wheels with the same inducer diameter, but less blades. The hx35 has an 8blade compressor wheel and a 7blade compressor wheel.

[turbotalon1g]

I am planning on switching to a HX35 in a bolt on BEP housing this winter if i can find one.
Then i will post up all and any info that i have on it.
The information in these 4 holset forums is a lot to take in.

[jkimes]

what is the part number for an hx40 with a billet wheel, 60mm inducer, and 19cm hotside?

[Slippi84]

Originally Posted by jkimes

what is the part number for an hx40 with a billet wheel, 60mm inducer, and 19cm hotside?

You have been looking for a turbo for way to long man. Now your getting way too specific lol. I haven't seen many hx40's with billet wheels but I know the exsist. I would just look for a hx40 with a billet wheel then worry about the hotside later. You can pick up a POS turbo with the hotside you want for like 200 on ebay and just use what you need.

[aero_sallee]

I had a chance to take apart the HE351VE my friend picked up. I used some clay to measure the minumum nozzle area with some clay. I definitely found out why it spools so quick and muffles the exhaust so much. It closes down all the way to around to somewhere between 3-4cm^2 my best guess at the right measurement is 3.5cm^2 nozzle area. Its so small of gap, around 1.5mm gap, with the soft clay its hard to measure it 100% accuratly.
So its variable from approximately 3.5cm^2 all the way to 25cm^2.



You can see how small it gets.

[winterftbl]

Can everyone who runs a holset post up what rpm they spool at. I think that it will help many people, including me. Thanks Guys

[aero_sallee]

Originally Posted by winterftbl

Can everyone who runs a holset post up what rpm they spool at. I think that it will help many people, including me. Thanks Guys

Yes it is a 2.4l. 8-8.3:1 compression.

Here were my initial spool results with the VGT rack fully closed and fixed there. This is just the first log I opened.
Here are the the most important things affecting spool

I can't remember what gear for sure but I think its 4th.

8" of 3" pipe for an exhaust
No intercooler
E85
8-8.3:1 compression
stock head, cams, intake manifold
Fairly low timing
1800 1psi
2000rpm 3psi
2500 8psi
2600 10 psi


Its a little slower now, the actuator starts to open the thing up a little sooner than I'd like.

Keep in mind this thing has a compressor in the GT35R size class.

[dsm-onster]

Holset h1c (flows as much as a 50 trim)
fp2x cams (laggy like 272s)
3" turboback exhaust
ebay tubular o2 housing
stock-style evo3 exhaust manifold
stock head
stock intake manifold
ebay fmic (20" X 9" X 2.5")
2.5" short route ic piping
2g maf
3" intake
K & N

3rd gear: 10psi @ 3000rpms, 20+ psi @ 3400rpms.

[gixrman]

Originally Posted by TxR6guy

All these pages and i think there is only 15 ppl on this site running a Holset including me

I have a Holset H1E on the car, but the car does'nt run, in fact the car has'nt left the garage since putting it on the car. Someday soon.......

[95tzlgst]

I have an hx35, but im still trying to get all my supporting mods.

[andy4g63]

Holset H1E, all mods in profile
T3-0.70 AR hotside
BC 280's
JMF Race IM,etc.
20psi @ 4800 RPM/3 gear.
Starts building boost at like 3500 RPM.

[420a-t]

Holset H1E
.55 bolt-on housing
Comp 101100/101200 cams
JMF SMIM
1g TB
Apexi Skyline FMIC
3" downpipe-back
stock compression
etc...

I get full boost (22psi) around 4200-4300rpms

[1stGenTSi]

Originally Posted by dsm-onster

Is the above too much to swallow? . . . In simple terms, the hx35 may flow as much an FPred but still of course spool faster than an evo3 16g; all the while with much higher efficiency at high boost. We don't know for sure of which compressor wheel holset gave up the above map. I'm leaning toward the 7blade 56mm wheel. There is a significant difference in flow between compressor wheels with the same inducer diameter, but less blades. The hx35 has an 8blade compressor wheel and a 7blade compressor wheel.

So you believe the 7-blade flows the most out of the HX35's? I have a 56mm 8-blade and a 54mm(? i think) 7-blade. Which one should I run?

[winterftbl]

thanks alot for the replies guys, keep 'em coming.

[turbotalon1g]

Good replies, any dyno numbers on what kind of dyno and also 1/4 times.

[420a-t]

My buddy made 575fwhp with his hx-35, .55 bolt-on housing. this was on a superflow dyno with 28psi and a 75 direct-port shot.

6 bolt
hks 272 cams
air-water intercooler
AEM EMS
3" downpipe
SMIM
etc...

[JWoodley]

My dyno results are under my username on a bone stock 7 bolt motor.