Well I bought a holset hx35. I read through those long threads and what not and decided to go 8 blade witha BEP housing. I don't have the BEP bolt on housing yet, but I noticed some people used spacers, is this because the turbo hits the block and water pipe? Or will I be fine with clearence?

I have not updated mt profile since it is not offically on the car but I will be running a ported evo manifold, hx35 8 blade with a .55 BEP bolt on housings into a ported evo o2 manifold to a 3 inch exhaust. Fueled and controlled by 1600cc injectors and dsmlinkv2. O and a srb big fmic. It is all sitting here, just waiting for some free time to get her done.

I don't know what to expect as far as numbers, shooting for 22psi on 93 pump gas. If anyone has a housing pm me, ill buy it

also, this is a nub question, sorry. How do I connect from the turbo to the fmic pipe since the turbo flares out at the air exits?

A few years back, i got my hx35 on with just denting the water pipe a little bit with the bep housing. The compressor outlet is vband style so youre either going to have to adapt your piping to vband or just rig a coupler over it with a good clamp.

The DSM Bolt-On Bullseye Turbine Housing for the HX35/HX40 doesn't even come close to hitting the block when used with a DSM cast manifold. Anyone that's had turbine housing clearance problems were using the HX35's 12cm2 Divided T3 turbine housing, I believe.

You can either grind down the v-band on the compressor cover outlet enough that a silicone coupler will slide over it, or pick up a 2.5" v-band fitting and clamp and have the v-band fitting welded to your lower intercooler pipe.

Okay, that makes me feel better. I am going to look for a v band clamp and flange at extreme psi. I should be getting the turbo in the mail next week, I hope I was smart going 8 blade and not 7. Will post ina few weeks for sure once I get a tune on the car.

The 7-blade ones are good for more power supposedly but they do cost more too.

jrohner said:

The 7-blade ones are good for more power supposedly but they do cost more too.

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They are good for more power(52lb vs 60lb), but i believe the outflow the capabilities of the .55ar bolt on housing and will do better in the .70ar bep or 12cm t3.

Well thats what I read, having a 7 blade in a BEP housing is pointless because you can not take advantage of the extra lbs/min. But if I am wrong correct me. Price is the same and I cans till change my mind! haha. I am shooting for 11.6 or lower on a hx35 on a stock/fresh 6 bolt with 2 piston 1g rod so I read the results page and thought the 7 would be useless since I am going BEP.

The 7blade is not useless in the .55ar housing. It is still going to be 50lb+ capable but will give you some room for more power if you do go t3 down the road.

I know your asking about the HX35 but my HX40 with a BEP and stock manifold did hit the water pipe just a little dent fixed it. Also something I ran into was on my 7 bolt block where the stock water feed line goes I had to take the bolt out and weld it shut ( it was 2 am other wise I would have just bought a bolt) but I did notice that my 6 bolt block does not have this, So just beaware of it. Not a big deal but just thought I would mention it. Myself and others have notice also that BEP does not chase the threads all the way down so you will have to washer your mounting bolts or finish chaseing the bolts holes.

Well I have a 6 bolt so

Well maybe someone could answer me this since I get confised by all those compressor maps in the holset results thread, at what point whould it be a disadvantage to run a 7 blade hx35 on a BEP housing?

95burgundyesi said:

Well I have a 6 bolt so

Well maybe someone could answer me this since I get confised by all those compressor maps in the holset results thread, at what point whould it be a disadvantage to run a 7 blade hx35 on a BEP housing?

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They say the .55ar has the capability to max out the 8blade which is 52lb/min, so i would assume somewhere slightly above the 52lbs. We are talking about 500+whp as well. Then later on down the road you can either run the stock 12cm housing or the bep .70ar which will give you the capabilities for more power(30-70whp)

At what psi will I need to run to make the maximum 52lbs/min on a 8 blade roughly?

I am getting the vibe of the old t28 vs evo 16g here, both make about the same power, one ahs more top end flow and one spools faster, am I getting this right? I guess I just want to make the most power I can on pump between the two turbos and I really want insane spool whihc si why the manifold and o2 housing are ported to hell and back.

Sorry I feela bit dumb now. I can't read a compressor map, but I can assemble a long block from a bare block, haha I have yet to snatch the pebble from the masters hand

95burgundyesi said:

At what psi will I need to run to make the maximum 52lbs/min on a 8 blade roughly?

I am getting the vibe of the old t28 vs evo 16g here, both make about the same power, one ahs more top end flow and one spools faster, am I getting this right? I guess I just want to make the most power I can on pump between the two turbos and I really want insane spool whihc si why the manifold and o2 housing are ported to hell and back.

Sorry I feela bit dumb now. I can't read a compressor map, but I can assemble a long block from a bare block, haha I have yet to snatch the pebble from the masters hand

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The t28 & e16g are completely different turbos so its not the same comparison. Both 7 & 8 blade hx35s use the same turbine wheel as well as I believe the compressor inducer/exducer is the same but different number of blades(obviously). The .55ar housing will spool approximately 4-500rpms faster than it would in the holset 12cm housing(plus 12cm is not bolton) but the tradeoff would be the increased topend capability of the larger turbine housing
Here is a calculator with a 2.0l upto 8krpm and 35psi and this will give you an idea at what points your engine will require 52lb/min turbo. What is the rest of your setup looking like?
http://cybrina.mine.nu:8080/WebModule2/compcalc?size=2.0&ve=90&boost=35&maxrpm=8000&Submit=Submit

Yes I know they 16g and t28 are different but I was trying to compair how close they are in how they make power.

My entire set up is, fresh 6 bolt with 1g big rods, 2g piston, arp headstuds and a cometic gasket, acl race bearings. 1g tb intake manifold, 1g head freshly rebuilt. ACT 2900 with 6 puck and tre stage 2.5 trans with 4 spider diff, act flywheel. walbro 255 with 1600cc injectors, controlled by dsmlinkv2. Ported evo manifold and ported evo o2 housing. Boost, oil pressure, and aem uego. And a slowboy big fmic kit.

I currently have all the above listed. I just am deciding on a turbo. I don't plan on making more than 400-450 to the wheels if I am lucky, being I don't have the bottom end to make that kind of power while being reliable.

So based on that map the 8 blade hx35 needs 28psi to reach its max flow rating. And the 7 blade would make that rating at a lower psi. hmm decisions...

Your engine will have different cfm/lbmin requirements depending on its rpm/boost. You are also going to need cams/valvetrain upgrades to hit 500+whp and probably 30psi+
Use this to help you plot compressor maps and it has the link to the above calculator
Compressor Flow Maps and Calculations

Sweet read, thank you for all the help

Yes, I ran out of funds for now for some 272s, but I think I should still be able to break 11 seconds this spring with this set up. Pft 12s are soo 2005. The only thing now is to figure out if I will need a restrictor or not since I have no balance shafts, I think I almost have to even if I did port the relieve valve based on the oiling thread.

Toofast82 has directed you to a website that shows you that VE is needed to determine flow/horsepower for a particular boost. This VE changes with a different flowing hotside. The bolton hx35 7blade, and the bolt on hx35 8blade have the same hotseide. Therefore the same psi will be required to see the same flow. There will be different efficiency at this boost because the map will be different, but efficiency can be negated by proper intercooler sizing: nearly all the heat increase from less efficiency can be nulled by a good intercooler.

Well I don't want to go above 26-27psi, so with this slowboy fmic which is 12x24x3.5 I think thats plenty of cooling! and will help cool the air when it is in higher psi.

Thanks monster for pointing out the same hotsides, I overlooked that. I think then since I can make up for the efficantcy the hx 8 blade would do me good! I am dying to see when this sucker hits full boost.

Up to choke of the 8blade compressor (52ish lb/min) you will get the same results of the 7blade. After that the 7blade will start pulling away if the hotside flows enough. It's debatable that the bolton hotside would be, though no one has proved it one way or another. Any intercooler with +70% efficiency (common front mount) will make up the difference in heat due to inefficiency up to choke. That is why a decent intercooler is so important.

Great info, I think we covered some things I still was wondering after reading the holset threads. 52 lbs/min is more than enough to max out my 6 bolt, so I think 8 blade was a good choice for me since they both preform the same until the "choke" you said monster. I don't knwo when this is as far as psi on a 8 blade but I am sure it is above 28psi.

I honestly don't knwo what it will make as far as numbers at 20 and 25 psi but thats what I am going to squeeze out fo her.

Definately over 28psi with your current list of modifications. I suggest a pair of 272 style cams. But either waym yes you have enough turbo to push the 6-bolt to it's typical/reliable limit.

Does anyone knows if the hx35 and hx40 share the same t3 .70 a/r bep housing. I bought t3 bep housing(was told it was for an hx35) but my hx35 clip won't line up on the bep housing. I tried every single possible way but it just won't line up. I leaning toward that its for an hx40 due to TMH2 writing and clips won't line up. Other than that the hx35 fits perfect in the housing.

The housing above is for HX-40...... It says TMH2... If it was TMH1, that would be HX-35...
Do not buy stuff without doing a little research first..

jusmx141 said:

The DSM Bolt-On Bullseye Turbine Housing for the HX35/HX40 doesn't even come close to hitting the block when used with a DSM cast manifold. Anyone that's had turbine housing clearance problems were using the HX35's 12cm2 Divided T3 turbine housing, .

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Not completly acurate. You will not have any clearance issues with a 6bolt but you will with a 7bolt. The water pipe wil have to be dented and one of the water supply lines lines (the one on the block) will have to be removed and either welded shut or screw a new bolt in it.

johnmarines said:

Not completly acurate. You will not have any clearance issues with a 6bolt but you will with a 7bolt. The water pipe wil have to be dented and one of the water supply lines lines (the one on the block) will have to be removed and either welded shut or screw a new bolt in it.

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If u read what he posted ((((BLOCK)))) not water pipe!!!!! You are going to have to dent the water pipe for a 6 or a 7 bolt.