Update us on the S2K results, sweet looking setup.

 

not going anything extreme on it, e85 with 1000cc and single walbro

 

Upgrading my set with a 4bar map, 1200cc Injectors, turning up the boost a bit on my HE351ve and SC14 twincharge setup.

 

Anybody been able to keep ac with an hx35?

 

So the pneumatic actuator is only a few mm off from bolting to the stock vgt controller location.

I need to see what air pressures make it move because it has a beastly spring setup and I can't take it apart all the way because the actuator arm is basically rivited to the diaphragm and is an interference fit.

I'll take a close look when I get home. Don't want to cut springs (it has two in a funky arrangement ) and not have the unit function properly

 

To go with what ppl have been saying about the Hx35, I have a Hx35, a built B series motor, 1000cc injectors. My spool up is @ 3500 rpm and my numbers are 440 Hp and 350 Tq on 22 Psi. Thanks to Mikey at Pro Function

 

I've devised a system using a small on board air system to have independent control of the vgt systen regardless of engine load.

My friend just put a sequential trans in his lotus that uses a pneumatic shifter system (has paddles) it has a small compressor (typical entry mini truck unit) and a super small 1-2 gallon tank (size of a milk carton) to provide the needed air

I could do the exact same thing but have it plumbed into a mac solenoid that uses a reference table on my EMS as well as a manual override control so that I can have full control without relying on the turbo to make the needed pressure for system control

I just have to root around my standalone and determine which table to use. Initial tuning of the system will be very touch and go but once it's dialed in it should make mind boggling power everywhere in the power band regardless of rpm

I might have a few different tables with varying degrees of aggressiveness and use a simple rotary switch to toggle different modes, same thing I'll be doing with traction control

 

I'm looking for any verified information on a hx30. There is very little information, especially verified, for this particular snail. I'm mostly looking for a verified compressor map, but am also looking for the general specifications. Even the hx30 parts do not offer any idea into the specifications. One place says it has a 9cm^2 compressor housing, while another source says 12cm^2. About the only information I could find was that the compressor wheel has a 44mm inducer, a 73mm exducer, and a 39mm hub legnth. Like I mentioned, any information on this illusive beast would be greatly appreciated.

 

the hx30 is t25 flanged for sure

 

The info is very limited on this turbo, I've also been advised against using it on performance applications by a turbo engineer that knows the field of Holsets and performance gas engines very well.

 

I know for sure the hx30 has a t3 flange rather than a t25. My friend ran it on his stock ls motor, which produced surprisingly great spool characteristics. The compressor inlet is fairly small itself, however the compressor housing is much "fatter" than a compressor housing off similar sized turbo. I'm not looking to use it for a high horsepower application, so I'm fine with it not being the baddest **** on the market. I can measure a hx30 if someone could help analyze it a little bit better. It has been driving me insane spending countless hours looking for the information, I just want to get to the bottom.

 

measure it and I'll do my best to help.

do you physically have the turbo with you? pictures of the wheels (with the housings off) would help a lot so I can look at the aerodynamic profile of both wheels and such

Most HX30s I have seen are T25 flanged and used mostly on the larger 4wd/4ws diesel boom forklifts

like these




unless there's another turbine housing option for them

 

Confirmed it was a t3 flange. I also confirmed the measurement on the 44mm inducer and 73mm exducer on the compressor side. I was working with limited time so I was only able to measure the exducer on the hot side, which is 52mm. I took a few pictures though, just none with caliper in because of time constraints.





















Sorry for the crappy pictures and lack of further information. Hopefully I'll have the opportunity to go further into it in the next few days. I'm hopeful that someone will eventually get access to the secrets so there will be no guess work. If all else fails I will hopefully be able to get in contact with Holset and find out for certain the specs since every other source is extremely questionable.

 

I would guess its a mid 40 lb/min turbo. The HX30 has a very low trim value, which is different to the other commonly used Holsets (HX35/40/50).

Thus its maximum flow might not be as high as the 73mm exducer might suggest, but this is mostly speculation on my part.

 

I found an HX30 compressor map forever ago, I'll see if I can find it again.

IIRC the HX30 likes high pressure ratios, just like the HX35/40s, this is reinforced by how thick the material on each blade is, in order to keep the wheel from deforming under high pressures/shaft speeds

 

I could probably never find the source again but one person claimed the wastegate was set for 32psi. I've found compressor maps on other forums, however they were always challenged for being authentic.

 

This comes in handy



General Map From Holset (tad small)

 

I don't know if that chart is 100% accurate. I know first hand that the hx40 not only has a larger turbine wheel than the 35 (which that chart shows) but the 40 definitely has a larger compressor wheel.. I have an HE351VE (same as the HE351CE but the VE is VGT and has a slightly different turbine wheel) which has the big 7 blade HX40 compressor wheel which is definitely bigger than the 35

 

Hx30w Compressor map. Not sure if it is accurate or not.




So far this is about to only map that can even be slightly authenticated. Hopefully something can be made out of this.

 

HX-30


He351ve map


HX40 map


HX35

 

^If that first map is actually corrected to lbs/min (top row of numbers, not the bottom, that is a different flow calculation and format) then I can't believe the hx30 will flow that much air

but if it does then I need an HX30 because I can imagine on a built, high compression ls/vtec that it would have super fast response, almost as fast, if not as fast as a gt2871r or a gt30r. And it's sweet spots are right where I will be making the power I want.. I would be in the 76%-77% efficiency range

any more info on the hx30 map you posted 92cxyd?

 

I doubt the "HX30" map quoted there is correct, as it shows a 55 lb/min flow rate which is applicable to the earlier HX35's which has a much bigger inducer and larger exducer as well.

I know the HX27 flows around 38 lb/min, thus one would expect the HX30 to fall in between the HX27 and the smallest of the HX35 models

 

edited post/ dumb statement.

 

Got those maps from a Twincharge calculator program I use.

From turbo brick site


HX35 from turbo brick

 

try 10,000-25,000 USD just for one map, they aren't cheap and theirs only two or 3 test rigs in the US, one belongs to Honeywell/Garrett and the other BorgWarner. As far as I know the 3rd one is a private owner but you'll never find it unless you know the right people

and you aren't about to spit out that kind of money

Holset has the maps but they are considered confidential and for Eyes Only reading by Holset and their dealers, etc. I know TheShodan has one of the Holset map books, maybe he can post one up