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Holset Turbos, PART 6

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I wonder if this compressor map is for the 6blade hx40. ????? The 7blade hx35 shows 57lb/min on the map and has a 56mm inducer. Here is the 8blade 58mm standard hx40 compressor wheel with the highest rpm curve missing. I added it based on the 2 other standard 40 maps.

The 16cm^2 housing is definately worth the whole turbo. They are hard to find. And I personally think would give the best compromise for flow and spool with a divided runner. And having a t3 bolt pattern, you have more options. The 16cm^2 turbine housing would be PERFECT for something like the standard 8blade 60lb/min hx40. . . with a divided runner manifold. Only thing that could be better would be the faster spooling pro40 10 blade turbine wheel with the 8blade hx40 in the 19cm^2 t4 turbine housing. Probably the same flow and spool but at a lower backpressure. Custom made holsets make me all warm inside. Would be nice to be able to get these turbos with more options readily available.
 
So you wouldn't recommend the bep mitsu housing? I'm sort of on a budget with this car and as of right now it's easier for me to buy a bolt-on mitsu housing for $250 than purchase a manifold and o2 housing.
 
^^^The specs are right on the ebay ad.



Gbradly, I didn't recommend any particular housing. I was just saying my above suggestion would be *ultimate* and *ideal* for that compressor size. A divided runner t3 or t4 manifold is VERY expensive. I was talking about those wishing to build a true twinscroll setup. The bolton 8blade hx40 has done a 580whp trap speed at 33psi. It's a hell of a turbo for a bolton.
 
So I bought a 6 blade 16cm hx40, correct? I am assuming reading all of this that a BEP housing would be a waste of my good 16cm housing and getting a t3 manifold would be a great Idea. My mod list is as listed: 8.3wiesco, eagle rod, eagle crank, 255, 1000cc injectors, 3" exhaust, dsm link, Springs and retianers, stock cams:sosad:, ss valves Evo316g, 2gmani, tiel38mm, buschur fmic, 1g bov.

I plan on gettin fp2 soon.
 
I never suggested that the 16cm^2 housing with an open t3 header would be a great idea. It will spool after 4500rpms that's for sure, as the 16cm^2 housing is larger than a .70 a/r BEP t3 housing. It will spool probably 1000 rpms faster and flow VERY well, probably more than you would ever need for a 60lb/min compressor IF you get a divided t3 manifold. You know like those $1200 shearer divided manifolds. You could fab your own like another here has done. But if you want it on easily and on now, the bep bolt on housing is fine. As I said it made VERY good power without too much boost. And spool will be over 20psi by 4100rpms.
 
I am looking for a better spool and I can't afford the divided manifold so I am going to look into a trade +$$ for someones BEP housing for mine, if anyone is interested. How much does a divided manifold go for anyway?
 
Wow I'm in my basement for a few days and this thread just explodes. Ok let me clear up a few things I noticed where wrong.

1. You can't add your boost to your base fuel pressure and try to calculate added fuel injected. The reason for the raising rate FPR is that the injector has positive or negative pressure on the pintle of the injector which will definitely effect fuel flow. All that is needed to attain the almost same amount of fuel flow is to change the fuel pressure behind the pintle the same amount as the pressure on the front of the pintle. So 660cc injectors with 44 PSI of base pressure pushing 30 PSI of boost is still pushing the same amount of fuel.

1a. The main reason for running lower than 44 PSI of base fuel pressure is for those people that are running very very large injectors. You do it to effectively make your injectors smaller and try to get an attainable idle. But even at max boost your injectors are still not putting out the correct amount of fuel so they will always be smaller unless you get a 2:1 or 1.5:1 raising rate FPR.

2. Chuck Norris isn't officially running anyones turbo. No one ever has seen under his hood and lived to talk about it.

3. Jack Baurer ?????

I'm not just waiting on an exhaust manifold and Head Gasket to be built. Both happen to be out of stock even at the builder so I have to wait for them to be built.

I also checked out the King Kams next to the BC288's and they are just huge. I have already returned the BC288's but I do have a few sets of stock turbo cams laying around. I'm definitely going to have to take some pics side by side. I'm not expecting much bottom end but top end should just be monstrous.
 
Morphius said:
I'm going to try it. I had Paul (99gst_racer) undelete the second post in the thread. I moved and added some brief highlights for posts for each page. I'm only through page 2 so far. I have to go back and bump the post count 1 to account for this additional post at the start. I might make it like the very first post (linked) so you just click each post link to view it, but it's even more time consuming, so no promises there.

We'll see how it works.

I need to contact Ludachris to see if a post can be added at the start of each of the Holset threads to do the same in the them.
Click to expand...

I think this would be extremely helpful for new people as well as locating posts you remembered reading in the past. I know ive referred a few guys to these threads and they get intimidated by the first 5 parts at 1000 posts each. Were you planning on doing the same for those?

Either way, i like the linked idea and thank you for the time you have and will put into this.


I think i just found my unicorn. I was about to give up on it and just make an adaptor and stumbled across it tonight. I thought i had seen one before, but havent been able to locate or confirm it since then. I think it is a t4 17cm^2 hx40 exhaust housing. Ill know for sure when it gets here. Here are some pics.
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Interesting I've never heard of a 17cm^2 hx40 turbine housing. I have a 19cm^2 t4 on mine.

Maglin said:
1. You can't add your boost to your base fuel pressure and try to calculate added fuel injected. The reason for the raising rate FPR is that the injector has positive or negative pressure on the pintle of the injector which will definitely effect fuel flow. All that is needed to attain the almost same amount of fuel flow is to change the fuel pressure behind the pintle the same amount as the pressure on the front of the pintle. So 660cc injectors with 44 PSI of base pressure pushing 30 PSI of boost is still pushing the same amount of fuel.
Click to expand...

I think we were mainly talking about fuel pumps. Ceddy runs 650s? or something like that but they are rated at that flow at ahigher base fuel pressure. He was clearifying that they actually flow less at stock base fuel pressure. But you're exactly right on the information you're giving. Fuel pressure regulator is 1:1 which means there is no flow increase. The only thing that increases flow is pulse width. The fuel pump is the only instrument in the fuel system that isn't static in flow. It's always on full blast, but the flow goes down as total pressure goes up. As boost goes up so does the total fuel pressure: base + the same pressure as boost added by the FPR to keep the same injector flow. As you turn up the boost, the fuel pump can flow less and less total volume.
 
I swear this thread needs a news letter. . .

I've known that there were a few attempts to knock off a holset turbocharger. But it's come to our attention thanx to Justin (jusmx141) that there is a serious attempt actually to forge the name of these turbochargers. Any I think it should be brought up here. Knowing you're buying a knock off is different then believing you're not. We've built ourselves quite a nice little support system for this turbo choice. This is the number ONE best compilation of data and results with holsets on gas 4cylinders in the entire internet. Please look over this link to see the telltale signs of a forgery.

I have zero issue with buying ebay parts. I have a fake tial wastegate and ebay intercooler on my car. But I also KNOW they are not name brand. I know what I bought. There is no tial name on my wastegate. An evo3 "GT" is not an exact name to the evo3 16g. A namesake is not a name and any one not knowing the difference, frankly, deserves his results and his efforts. There is nothing wrong with buying a fake holset. But there is something wrong with forging a name. You need to know that we actually cannot help you with your questions, if you do. This is the number ONE best compilation of data and results with holsets on gas 4cylinders on the entire internet. But, the support system has no experience in fakes. And I can safely say that forgery is something that none of us will encourage in the first place. Lets give credit where credit is due and keep the leaches out. Namesakes and forgery are VERY different. And It should make your blood boil when you see someone trying to take advantage of others based on yours and your fellow enthusiast's input here. And, that is exactly what's happening: an attempt to downright lie to the consumer and a fellow performance enthusiast that sees eye to eye with you on a choice in turbocharger.

So to nip this right in the bud once and for all: There is enough used holsets to go around for all of us. Holset rivals garrett in the world market. It is the 2nd largest producer of turbochargers in the world. They ALL are big. There's no reason why you can't wait to get a real piece and have it rebuilt if you want new or it requires a rebuild. If you must have something virgin, go to a reputable vendor. Their names are scattered through out these pages. You will BY FAR be paying less than any other option out there as it stands with a real, used holset. Don't be a foolish consumer. So. . .

Buy used on ebay and have it rebuilt if needed. Buy new from a reputable vendor. Do this with all turbocharger choices. If you choose a fake, at least don't buy a forgery. We like forged compressor wheels; not forged brands. An ebay intercooler is infinitely less complicated than a turbocharger in every way. There's much less risk involved. We are not setup to help you with a holset forgery. We can help by encouraging you to get rid of it. The wonderful thing about holset is the durability of an OEM turbocharger that can be bought used for very little because of the vast abundance of engines these turbochargers employ. Again, There is enough used holsets to go around for all of us. And there's plenty of good rebuild shops that can net you an incredible deal on a serious, REAL piece of performance machinery.
 
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So which O2 housing gasket best matches the BEP housing?

1g, 2g or EVO3?
 
Onlyfor the turbine wheel though, correct?

What about straight ultra copper rtv?
 
Same here before, when I had the bolt-on. But somehow the bolts on the O2 got a little loose and the little space left between the main passage and WG hole/was using external off O2/, got burned. After that, I ordered another one from Turbo Trader/ it is actually much THICKER/, installed a Nord Lock washers and never had a problem.
 
Actually, while browsing around, I found this:World Tech Engineering Co.,Ltd.

Look at the sizes on HX-40 and HX-40R, if judging from their HP ratings, the 8balde is just 5% below the 6blade, so theoretically, if 6blade flows 70lb/min, 8blade would be aroen 67lbs/min. Not to mention, that the 6blade has significally bigger exducer on the comp. wheel. Don't forget, that the power jumped significcally on the FP turbos, making the comp. wheel exducer from 82 to 86mm in the 3586 HTA turbos. What is the exducer size on 6blade/60mm wheel?

It will be very interesting if there were some comp. maps for both turbos.

And last, but not least, look at their HX-45PRO. I allways felt, that hx-40 turbine wheel, could be mated with much bigger compressor wheel. This turbo would be best choice in my opinion, even with bolt-on housing. This turbo is extremely close in size with GT4094R, wondering what the spool-up on this thing would be in comparisson...
 
andy4g63 said:
Actually, while browsing around, I found this:World Tech Engineering Co.,Ltd.

Look at the sizes on HX-40 and HX-40R, if judging from their HP ratings, the 8balde is just 5% below the 6blade, so theoretically, if 6blade flows 70lb/min, 8blade would be aroen 67lbs/min. Not to mention, that the 6blade has significally bigger exducer on the comp. wheel. Don't forget, that the power jumped significcally on the FP turbos, making the comp. wheel exducer from 82 to 86mm in the 3586 HTA turbos. What is the exducer size on 6blade/60mm wheel?

It will be very interesting if there were some comp. maps for both turbos.

And last, but not least, look at their HX-45PRO. I allways felt, that hx-40 turbine wheel, could be mated with much bigger compressor wheel. This turbo would be best choice in my opinion, even with bolt-on housing. This turbo is extremely close in size with GT4094R, wondering what the spool-up on this thing would be in comparisson...
Click to expand...

Nice find on the website! It said on there under Hx40r that the 6blade was 60ind/87exducer
I'm kind of curious about the hx-45 as well. Those are big compressor options 66mm/100mm or 71mm/100mm. It looks like the 66mm is the hx50 compressor and the 71mm is the hx55 according to their specs but with the smaller hx40 turbine.
I'd love to see what it would do as far as spoolup and power! I do think these compressors are too big for the .55ar to make any more any more usable power than a hx40 compressor would. They would probably be pushing the ar70 to the limit as well.
 
toofast82 said:
Nice find on the website! It said on there under Hx40r that the 6blade was 60ind/87exducer
I'm kind of curious about the hx-45 as well. Those are big compressor options 66mm/100mm or 71mm/100mm. It looks like the 66mm is the hx50 compressor and the 71mm is the hx55 according to their specs but with the smaller hx40 turbine.
I'd love to see what it would do as far as spoolup and power! I do think these compressors are too big for the .55ar to make any more any more usable power than a hx40 compressor would. They would probably be pushing the ar70 to the limit as well.
Click to expand...

I know, but that just confirms my theory, that the HX-40 turbine wheel is capable of much more... As far as the 0.55 bolt on , you are right, but it will be kind of DSM HTA 88mm, but in a Holset version, which is going to sound a little better like:
DSM Holset-100.

And doesn't matter what they say, but SIZE allways matters.LOL
 
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