Holset Turbos, PART 5

JWoodley · Jan 16, 2009

jrohner said:
Where's the graph? You should post it in the holset results thread.

I'll see if I can find it. The shop the dyno was at is no longer open. Thats another thread though.

VETTE_50_TH · Jan 16, 2009

Hey guys, which is the better of the two, hx40 with the eight blade or seven blade? I got the seven blade.

James :laser:

kawboy · Jan 16, 2009

7 Blade has potential for more peak power.

Which housing makes more power per psi (for pump gas)

T3 or Bolton Mitsu?

1gDSM4g63 · Jan 16, 2009

The .70 a/r. T3

Morphius said:
HX40:

The 8blade hx40 has a 58mm inducer and flows about the same as a 60-1 (around 60lb/min) with ALOT better high boost efficiency and spool speed. It is the most common hx40 out there. The small bep housing with the hx40 turbine wheel is plenty to reach the full potential of the 60lb/min 8blade hx40 compressor. 20+ psi by 4100rpms with 272s.

The 7 and 6 blade hx40 is called the super40 and has the 60mm compressor inducer. This compressor flows around 69lb/min. You can get this wheel in billet style (think HTA). The non-billet wheel spools as fast as the 8blade hx40 in the bolton bep housing and has done 653whp at 40psi per the holset results only thread. Billet should spool even faster. The t3 .70 a/r BEP housing slows spool about 400rpms. But reports show a significant gain in flow per psi. So expect more power at lower boost with that turbine housing.

VETTE_50_TH · Jan 17, 2009

I guess I am getting a T3. Sorry Mike, LOL

. I gotta get a T3.

James :laser:

1gDSM4g63 · Jan 17, 2009

I read somewhere on one of the pages that the HX50 is bigger than the HX52. Does anyone know if that's true?

IPT · Jan 17, 2009

FYI anyone that is thinking about bolt on DSM housing for the HX35 or HX40 there are only 5 of each left over at turbotrader.com when those are gone the price will be going up $30 for the next run.

kawboy · Jan 17, 2009

From the turbo trader:

All the T3 inlet turbine housings are made from Cast iron and they
have a 3" vband outlet.

The bolt on DSM housings are made from stainless steel.

Thanks

Nick M

We're on Boost · Jan 17, 2009

IPT said:
FYI anyone that is thinking about bolt on DSM housing for the HX35 or HX40 there are only 5 of each left over at turbotrader.com when those are gone the price will be going up $30 for the next run.

That's not so bad. I wasn't so sure there would even BE a next run!
I wonder how fast they sell these things? Because back in October David Hall told me there were only 5 left.

Gary

We're on Boost · Jan 17, 2009

dsm-onster said:
Of course, the hx40, or even the hx35, won't fizzle out after 600cfm or 2700hz (safe metering limit of the 2g maf) like the evo3 16g will.

Matt, do you know what 2700 2g hz equates to in 1g hz? I mean, I know a 1g MAS won't go that high but I'm just trying to get a handle on the translation between 1g and 2g hz.

Gary

dsm-onster · Jan 17, 2009

The rule of thumb is about 20% higher. I've never seen a 1g maf transfer function, just the Jeff Lucius 2g/3s graph.

95GSXCO · Jan 18, 2009

Ok guys so which housing is better for the HX40 on the street? mitsu or the T3? I know the T3 will flow more but would it be better for the street? I will not put a cage in my car so if I remenber right 11.99 you have to have one correct? So If the mits housing would get you into 10s easily then it looks like the mits housing would be better for me correct? How much quicker spool would it have over the T3 if any? So Iam thinking that I will get one pass on the 1/4 mile before they kick me off so then I would be stuck on the street. :cry:

andy4g63 · Jan 18, 2009

95GSXCO said:
Ok guys so which housing is better for the HX40 on the street? mitsu or the T3? I know the T3 will flow more but would it be better for the street? I will not put a cage in my car so if I remenber right 11.99 you have to have one correct? So If the mits housing would get you into 10s easily then it looks like the mits housing would be better for me correct? How much quicker spool would it have over the T3 if any? So Iam thinking that I will get one pass on the 1/4 mile before they kick me off so then I would be stuck on the street.

They are both OK for the street. There is about 400 RPM difference in spool up time between the two. 4100RPM, vs 44-4500 RPM/this is in 4 gear/. With the bigger one you get more flow per PSI , so you 'll make more power with less boost compared to bolt-on housing and definately good #'s on pump gas. Of course it is a little more expensive and a little extra lag, but is definately worth it.
About the bolt on getting you into the 10's, it is def. possible, but on a VERY WELL prepped car, with a little weight reduction. There is guy, that ran 10.9 with Holset, but I don't remember, which housing he had.

IPT · Jan 18, 2009

On the street 400rpms of spool can make the car more fun on the street. IE not having to downshift to race. But if you are looiking for peak power on pump gas then the .50 a/r housing would be better.

GST95 · Jan 18, 2009

95GSXCO said:
Ok guys so which housing is better for the HX40 on the street? mitsu or the T3? I know the T3 will flow more but would it be better for the street? I will not put a cage in my car so if I remenber right 11.99 you have to have one correct? So If the mits housing would get you into 10s easily then it looks like the mits housing would be better for me correct? How much quicker spool would it have over the T3 if any? So Iam thinking that I will get one pass on the 1/4 mile before they kick me off so then I would be stuck on the street.

At the tracks around here are IHRA which is 11.49. Not sure about NHRA though.

dsm-onster · Jan 18, 2009

If the bolton housing with the small hx35 turbine wheel is enough for 11.2 at 126mph. The bolton housing with the p-trim size hx40 turbine wheel can EASILY see 10s.

kawboy · Jan 18, 2009

I'd just use the bolton housing.

The extra cost and fabrication for the T3 setup is not worth the gains IMO for a street car

ceedawg · Jan 20, 2009

GST95 said:
If you figure out the assembly number that has the 17cm t4 housing, let me know. I dont think anybody is using a hx40 with a TS manifold yet, so it would be kinda hard to say which one would be better. It appears that the inlet has minimal to no change on the rest of the housing. If you find a divided t3 manifold you like, i think the 18cm housing will probably work well. If it is still a little too laggy, you also have a 16cm housing. If you find a divided t4 manifold that you like, then get a t4 housing. I think the 17cm will be better then a 19cm housing, but i dont have any experience with a TS setup to be able to compare it to a single scroll.

I am leaning toward the 17cm T4 housing if I know it will bolt up to my HX40 6 blade. My suspiscion is that it will flow better on the Topend than a 18cmT3 with a TS but then this is only speculation on my part.

Does this turbine hsing(17cm T4 hsng) only come with the HX 50,52 and higher?

dsm-onster · Jan 20, 2009

If the critical area (the 16, 17, 18 cm^2 number) is the same, then how will it flow more

?

ceedawg · Jan 21, 2009

dsm-onster said:
If the critical area (the 16, 17, 18 cm^2 number) is the same, then how will it flow more ?

Gotcha!

Iroc_g · Jan 22, 2009

Im curious about opinions on the T3 vs mitsu as well. Ive been leaning towards the T3, because ive been learning that the more flow per PSI is going to be less pront to knock. Is this true? Also, I read that somebody suggested the T3 .55ar housing. In conversations I have had with The Turbo Trader, he said the T3 housings are all .70ar, and 3"vband outlet. Am I missing somthing here?

Also, in a few psots up, I saw somebody say that HX40 spool is 4100 mitsu housing, 4500 T3 housing in fourth gear! I know this isn't a fair comparrison, but my EVO3 could spool 24PSI well under 3K in fourth if I stomped it at like 30MPH in fourth.

ceedawg · Jan 22, 2009

Iroc_g said:
Im curious about opinions on the T3 vs mitsu as well. Ive been leaning towards the T3, because ive been learning that the more flow per PSI is going to be less pront to knock. Is this true? Also, I read that somebody suggested the T3 .55ar housing. In conversations I have had with The Turbo Trader, he said the T3 housings are all .70ar, and 3"vband outlet. Am I missing somthing here?

Also, in a few psots up, I saw somebody say that HX40 spool is 4100 mitsu housing, 4500 T3 housing in fourth gear! I know this isn't a fair comparrison, but my EVO3 could spool 24PSI well under 3K in fourth if I stomped it at like 30MPH in fourth.

I had a T3 .55A/R housing that was custom made by BEP for my HX40/35 and turbonetics T3/T4 exh manifold. I think they may still sell them. It will make the HX 40 spool faster than the .70AR T3 housing. Members have made good power (over 550whp+) with the .55AR hsing but I personally prefer the .70AR housing for the very reasons you stated,less prone to knock. Don't forget that it also helps if you have a good FMIC,tuning,fuel all wrking together to give you optimal results. An HX40 from what I understand with either hsing will make you forget about your old EVO3 setup.

toofast82 · Jan 22, 2009

Iroc_g said:
Im curious about opinions on the T3 vs mitsu as well. Ive been leaning towards the T3, because ive been learning that the more flow per PSI is going to be less pront to knock. Is this true? Also, I read that somebody suggested the T3 .55ar housing. In conversations I have had with The Turbo Trader, he said the T3 housings are all .70ar, and 3"vband outlet. Am I missing somthing here?

Also, in a few psots up, I saw somebody say that HX40 spool is 4100 mitsu housing, 4500 T3 housing in fourth gear! I know this isn't a fair comparrison, but my EVO3 could spool 24PSI well under 3K in fourth if I stomped it at like 30MPH in fourth.

They sell T3 .70ar with the T3 inlet and mitsubishi discharge. It really depends on your goals as to which housing. Obviously the .55ar bolton will have better spool but you seem to already know that. But it appears the .55bolton is 10sec capable and enough to max out the 8blade hx40 compressor.

kawboy · Jan 22, 2009

toofast82 said:
They sell T3 .70ar with the T3 inlet and mitsubishi discharge. It really depends on your goals as to which housing. Obviously the .55ar bolton will have better spool but you seem to already know that. But it appears the .55bolton is 10sec capable and enough to max out the 8blade hx40 compressor.

Whos they?

Turbo trader doesn't have them.

toofast82 · Jan 22, 2009

"They" is Tim's Turbos which was who i bought my bolt on housing from almost 3years ago
Tim's Turbos - Turbo Rebuilding - Steel Turbine Housing - T3 Inlet
They also have for t4 inlet

The Top DSM Community on the Web

Holset Turbos, PART 5

JWoodley

VETTE_50_TH

kawboy

1gDSM4g63

VETTE_50_TH

1gDSM4g63

IPT

kawboy

We're on Boost

We're on Boost

dsm-onster

95GSXCO

andy4g63

IPT

GST95

dsm-onster

kawboy

ceedawg

dsm-onster

ceedawg

Iroc_g

ceedawg

toofast82

kawboy

toofast82

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