Hello everyone, I was wondering if any of you ever heard of or ran a 7 blade 62mm compressor wheel from BAEturbosystems. I just recently installed one on my car and wanted to know if anyone else ran one and what were their experience and results.

Before I installed this new wheel I had a 6 blade 60mm/86mm compressor wheel and since day one of that turbo if I tried to run more then 30 psi the boost would drop 2-3 pounds from 6500-8200 rpms. So let's say it would reach 35 psi by 5k at 6500 rpms it would start to drop and by 8200 it would be 32 psi. A friend of my also runs a 6 blade hx40 and that thing will hold a flat line of 35 psi to red line no problem. Few other people I know that run the same turbo have no boost drop like I did. So I rebuilt my cat-back exhaust from 3" to 3.5" and put a 60mm eBay wastegate as a cut-out about 20" down from the turbo, my exhaust pressure dropped about 3-4 psi and the car made 70+ awhp more then 3 months before on the same dyno but the boost drop was still there. I've tried few different things like different wastegates and springs, different boost controller, degreed my cams which turned out to be few degrees off and nothing helped. I run a BEP exhaust housing, t3 .70 a/r which turned out to be not the problem since I tried to run a divided t3 16cm2 stock housing with the same boost drop except for few psi less of exhaust pressure. I couldn't imagine it being my intercooler or piping since its 4" intercooler and 3" piping.

So after all these tests I came across this wheel, its a direct replacement to a 60mm/86mm wheel, it comes with a new compressor cover. So I thought what the hell and bought it. I put it on about a week ago and took the car for a drive and the boost drop was fixed. Now the turbo holds 35 psi no problem to 8200 rpms with the same exhaust pressure as before.

I guess this is not much of a question but I came across something that I think is good and wanted to share some info with others, and no I have no relation to BAEturbosystems other then a satisfied customer

Sounds like your motor is out flowing your turbo.

Interesting, sounds like something I would look into if my current HX40 needed a rebuild.

Do their compressor covers still have the anti-surge ports in it like the factory Holset covers?

The cover is almost identical to holset, it comes in 2 options on the outlet port, its either 2.5" v-band or 2.5" slip on. The covers come polished with silencer ring and snap ring, also with a new snap ring that holds the cover on. I'm posting this of my phone so I don't know how to post pics. If you got to their site baeturbosystems.com you can check it out there, they seem to have some cool stuff.

I hold 38psi all the way to 9250rpms no problem, with my 6 blade!

I held 40psi all the way to 8700-8800 rpms on my 6-blade HX40.

So is this a worthwhile upgrade or not?

I have an HX35 (8 blade on a BEP .70 T3) sitting unused since I bought an HX40 pro, I am curious if this would be a nice upgrade for the 8 blade HX35 (especially since it's on the BEP T3).

I'm thinking you were maybe having compressor cover sealing issues originally since that was another variable that was changed? As others stated from experience, including myself, you shouldn't have problems with boost taper on the 6 blade under 40psi. That said, I AM curious to see what this would flow over a standard 60mm wheel? It's a much cheaper option over the BEP batmo wheel and I'm a believer the IF DESIGNED PROPERLY, size is going to make much more difference in flow over the batmowheel that simply uses a different design of the same standard 60mm. I know Justin isn't much of a fan of BAE, but maybe we could get some testing started on this? I tried to pitch the idea of a 62-64mm batmowheel to Bill at BEP, and he wasn't very interested so maybe if we can get some positive results with this, it will spark some competition?

I had a spare 60mm/82mm 8 blade hx40 wheel and cover so yesterday I put that on my brother's hx35 running a stock 12cm2 exhaust housing. His original hx35 compressor wheel was 54mm/76mm so I had to do a little bit of machining to the back plate to fit the wheel but the car seem to spool about the same but pulls a bit stronger at the top end.

All the turbos I've even ran I took the compressor cover off and put a slight film of silicon on the back side of it where it comes in contact with the back plate, so I doubt it was a sealing issue.

I don't know if this wheel is better or worse then bep batmowheel. It is bigger on the inducer side which is a plus but bep has 6 blades vs 7 on this one. This wheel is 5mm taller then the stock 6 blade hx40 but I'm not sure how tall is the batmo wheel, from the pictures it looks like it would be taller. I think the biggest thing batmo wheel has over stock 6 blade is the blade pitch and possibly blade height if its taller. Just like the boat prop that has a longer pitch will have more top speed. If you look at the wheel as a boat prop the batmo wheel will travel further in one revolution then the stock 6 blade hence more air flow out of it.

Bae wheel has a similar blade pitch as a batmo wheel but its 2mm bigger on the inducer side. I talked to Bob at bae few days ago and he told me that they are planning on making some 64mm wheels. I told him they should look in to making those wheels with an extended tip while leaving the back of the wheel the same size so it can still be a direct replacement, he said he will run that by his designer. A 64mm/90mm would be a nice upgrade

Keep us posted on your BAE wheel. I have always been a bit weary of running one of their turbine or compressor wheels. It would be nice to know how they hold up compared to genuine holset parts.

64mm would be very interesting!! Keep us updated and if you can, log what its flowing. You should test it against your old wheel. I didn't look at your mods but I'm assuming you have link, right?

Looking at the quality of the bae wheel vs holset I would say you couldn't tell the difference between the two. I had it on my car for about 400 miles now with few hard pulls at 32 psi and everything seems to be working properly. I'm hoping to see better numbers this Friday but we will see. I'll keep you guys posted.

Yes I run link v3 on speed density and I can tell you right now that I've seen 3-4 lb/min more at the same boost as my 6 blade but my air flow is not accurate. From my understanding air flow is calculated off of boost estimate and my boost estimate is like 6-7 psi less then the actual boost from 5000-8500 rpms. I run 4 315cc water/meth nozzles one in each runner so I have a lot of not monitored (fuel) by ecu going in to the motor. My VE values at higher boost (25+) are in the 80s so that lowers my boost estimate hence lower air flow numbers. I've seen it in upwards of 56 lb/min with boost estimate 6-7 psi lower at 30 psi actual boost.

rr06rs said:

I know Justin isn't much of a fan of BAE, but maybe we could get some testing started on this? I tried to pitch the idea of a 62-64mm batmowheel to Bill at BEP, and he wasn't very interested so maybe if we can get some positive results with this, it will spark some competition?

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You're right- BAE can kiss my ass. Overpriced knockoff parts; atrocious customer service.

I'm sure Bullseye would be on-board to do a BatMoWheel 62 or 64 if they could offer this upgrade for any 86mm HX40....allowing profit to be made on both the wheel and cover should they choose to cast their own covers as well like they do for the BW turbos.

It would be nice to have an upgrade that would bridge the gap between the HX40 and HX52; although at some point users are going to hit a turbine flow wall depending what housing they're using. For example, a DSM bolt-on housing user should never consider a 64mm compressor wheel upgrade. In fact, I think there's a lot left in a standard HX40 6-blade compressor if mated to a larger T3 turbine housing...and I may prove that once Dave hits an airflow wall with his current .70 Bullseye housing.

I'm damn-determined to get an off-the-shelf 6-blade HX40 to trap 160mph.

dude, you didnt tell me they were gonna start to offer this wheel in a 64mm! this will be my next upgrade

JusMX141 said:

I'm damn-determined to get an off-the-shelf 6-blade HX40 to trap 160mph.

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im going to be really excited to see this, and will give me hope for my setup. my motor would blow to pieces with that much boost though hahah. i think im pretty limited at the 600 mark.

JusMX141 said:

You're right- BAE can kiss my ass. Overpriced knockoff parts; atrocious customer service.

I'm sure Bullseye would be on-board to do a BatMoWheel 62 or 64 if they could offer this upgrade for any 86mm HX40....allowing profit to be made on both the wheel and cover should they choose to cast their own covers as well like they do for the BW turbos.

It would be nice to have an upgrade that would bridge the gap between the HX40 and HX52; although at some point users are going to hit a turbine flow wall depending what housing they're using. For example, a DSM bolt-on housing user should never consider a 64mm compressor wheel upgrade. In fact, I think there's a lot left in a standard HX40 6-blade compressor if mated to a larger T3 turbine housing...and I may prove that once Dave hits an airflow wall with his current .70 Bullseye housing.

I'm damn-determined to get an off-the-shelf 6-blade HX40 to trap 160mph.

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I suppose that answers that. So there is no reason to do an HX35/40 type hybrid on my unused 8 blade HX35 then? Oh wells. BAE systems aside and all that.

Be careful with BAE. I bought a few rebuild kits from them and at first I thought they were great. But then they started taking forever to ship the stuff and not returning any questions I had. Their feedback went straight into the shitter on ebay and now they aren't even registered users:

eBay My World - baeturbosystems

MightyMax88 said:

I suppose that answers that. So there is no reason to do an HX35/40 type hybrid on my unused 8 blade HX35 then? Oh wells. BAE systems aside and all that.

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Not unless you're looking forward to additional lag with zero peak airflow benefit....not to mention the 8-blade HX35 and 6-blade HX40 compressors are two completely different animals when it comes to boost level required to make airflow. By the time you'd crank the boost high enough to make the compressor happy you'd be at such a restriction on the turbine side that your EGT's would likely melt the inducer tips right off the turbine.

The only way such a setup would work is if you had a large a/r HX35 turbine housing...at which point you may as well use a small a/r HX40 housing with the HX40 turbine. In fact, the ultimate DSM bolt-on HX35 should probably have a HX40 turbine wheel.

JusMX141 what you are saying is one man's opinion, I can't defend bae because I haven't had enough experience with them or their product but so far I have no complaints. I can say the same thing for bep and their service. Years ago when they first started I was one of the first people to buy a holset hx40 from them and Dave gave me a good price on it. I remember when I was able to call and talk to Dave about this or that but ever since bep got all big and fancy I can't even get a hold of Dave, I leave him a message and he never gets back to me.

About a year ago I bought a s362 from them and when I put it on the car I noticed I was losing oil and the car was smoking. When I took my intake pipe off the compressor wheel was covered with oil. I pulled my intercooler off and dumped about 1/2 qrt of oil out of it. To save me 50 dollars in shipping cost I took the turbo apart myself and discovered that there was a damaged o-ring behind the compressor wheel that was damaged when the turbo was put together. I replaced that o-ring and put the turbo back on the car. This time no oil in the intercooler but it still smoked. I called bep and ordered new bearings and piston ring for the exhaust side, put it all back together and it still smoked. I tried a smaller oil feed line with a restrictor with no success. So finally I decided to send the turbo in since nothing I did fixed the problem. When bep got my turbo I got a call from them, turns out the bearing ports or whatever you call them, the port where bearings sit were machined to big therefore allowing way to much oil to by pass through there. That was their in house center cartridge that they made and machined.
In reality they should have sent me another one but since I took it apart myself they said that voided the warranty. It was not my fault that their product was machined wrong to begin with, I took that turbo off the car three times. So after I just spend a bunch of money on this new turbo I had to buy another bare center cartridge. The new one from them was like 325 dollars so to save me some money I just bought a used original BW one for $150 and everything worked fine after that.

So just because you may have bad experience with a company doesn't give you a right to talk shit about them. Every company has its good and bad but $400 dollars for a batmowheel I think is a little out of line. For $400 dollars I can buy hx52 and put that batmowheel to shame. I had an hx52 with a billet compressor wheel, that thing cost me $350 dollars after I rebuilt it, its on my friends 2jz right now and works great.

JusMX141 said:

You're right- BAE can kiss my ass. Overpriced knockoff parts; atrocious customer service.

I'm sure Bullseye would be on-board to do a BatMoWheel 62 or 64 if they could offer this upgrade for any 86mm HX40....allowing profit to be made on both the wheel and cover should they choose to cast their own covers as well like they do for the BW turbos.

It would be nice to have an upgrade that would bridge the gap between the HX40 and HX52; although at some point users are going to hit a turbine flow wall depending what housing they're using. For example, a DSM bolt-on housing user should never consider a 64mm compressor wheel upgrade. In fact, I think there's a lot left in a standard HX40 6-blade compressor if mated to a larger T3 turbine housing...and I may prove that once Dave hits an airflow wall with his current .70 Bullseye housing.

I'm damn-determined to get an off-the-shelf 6-blade HX40 to trap 160mph.

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Yea, that's exactly how I pitched it to Bill, stating that they wouldn't have to adapt much of the tooling since they already offer the covers for the BW units. For some reason he seemed totally disinterested though. That was exactly how I addressed it as well....filling the void between the hx40 and hx52. I think the 64mm turbine is more than sufficient to keep up with a 64mm or even 66mm wheel. I agree, to get the most out of them, a larger turbine housing option is in order. the nice thing is there are plenty of t3 .82 housings out there for cheap and machining is fairly easy. This is why I already have a machined .82 housing waiting for when I hit the wall in my .68-.69 FP bolt on housing. If a worthy 64-66mm wheel option comes about in that time, I'll be purchasing it for the .82 setup, for sure. I can't bring myself to pay $350-$400 for a wheel that is the same 60mm as my holset wheel though. I don't care HOW "Batmofied" it is. I'll take mm's over extended tips...

Boostdriven said:

So just because you may have bad experience with a company doesn't give you a right to talk shit about them.

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When they cost me time, money, and add unnecessary stress on myself as well as my relationship with my customer...they're no longer someone that I'm going to do business with and I have no problem letting people know that.

Compare the price of the billet BatMoWheel with other billet wheel upgrades on the market and you'll see it's not nearly as expensive as you're making it seem. Whether it's a worthy upgrade or not is another thing, but with literally every manufacturer seeking billet compressors these days I can see why Bullseye decided to venture into that market.

JusMX141 said:

Not unless you're looking forward to additional lag with zero peak airflow benefit....not to mention the 8-blade HX35 and 6-blade HX40 compressors are two completely different animals when it comes to boost level required to make airflow. By the time you'd crank the boost high enough to make the compressor happy you'd be at such a restriction on the turbine side that your EGT's would likely melt the inducer tips right off the turbine.

The only way such a setup would work is if you had a large a/r HX35 turbine housing...at which point you may as well use a small a/r HX40 housing with the HX40 turbine. In fact, the ultimate DSM bolt-on HX35 should probably have a HX40 turbine wheel.

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Heh oh wells, then the 8 blade will just sit on the .70 BEP T3 housing unchanged.

Unless getting the HX40 turbine to work on the 8 blade isn't too much of a hassle. Otherwise I'll just sell it and buy another 7 blade HX40 pro for my other mighty max.

JusMX141 said:

Not unless you're looking forward to additional lag with zero peak airflow benefit....not to mention the 8-blade HX35 and 6-blade HX40 compressors are two completely different animals when it comes to boost level required to make airflow. By the time you'd crank the boost high enough to make the compressor happy you'd be at such a restriction on the turbine side that your EGT's would likely melt the inducer tips right off the turbine.

The only way such a setup would work is if you had a large a/r HX35 turbine housing...at which point you may as well use a small a/r HX40 housing with the HX40 turbine. In fact, the ultimate DSM bolt-on HX35 should probably have a HX40 turbine wheel.

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Got a update on my brother's car with hx35/40 hybrid, the one that I installed an 8 blade 60/82 hx40 wheel . So yesterday I installed exhaust pressure gauge and took the car out for a spin. With boost at 30 psi I'm getting 22 psi of exhaust pressure. The turbo has 76/60 exhaust wheel with 12cm2 exhaust housing which is very close in size to a bep .70 a/r housing. I understand that 8 blade and 6 blade are a little bit different wheel and the 8 blade will move more air at slower speed and less at the top end but the 6 blade is a lighter wheel. I haven't tried to run the 6 blade on it yet but I'm pretty sure that I would get a similar results with an exception of more power at the top end.

If you look at the specs of a popular gr35r the exhaust wheel is much smaller then the compressor wheel. 61.4/82 vs 68/61.5 that exhaust wheel is 1.5mm bigger on the exducer side then the hx35 but 8mm smaller on the inducer side. They offer that turbo with .63 a/r exhaust housing and many people run those turbos. I haven't heard of one person melting the tips of the blades off and if your melting your exhaust wheel you have bigger problems then just the exhaust housing.

MightyMax88 said:

I suppose that answers that. So there is no reason to do an HX35/40 type hybrid on my unused 8 blade HX35 then? Oh wells. BAE systems aside and all that.

Heh oh wells, then the 8 blade will just sit on the .70 BEP T3 housing unchanged.

Unless getting the HX40 turbine to work on the 8 blade isn't too much of a hassle. Otherwise I'll just sell it and buy another 7 blade HX40 pro for my other mighty max.

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You are to fast to jumping opinion ships. Do some homework first before you make any decisions about your set up. Hx35/40 is popular with the diesel guys and some gas guys, its a set up that's been proven to work for years, so just because one guy who spends to much time on tuners and not enough time turning wrenchs says something doesn't make it a solid fact

Boostdriven said:

I haven't heard of one person melting the tips of the blades off and if your melting your exhaust wheel you have bigger problems then just the exhaust housing.

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I'll just leave this here.




Standard GT3582R with a .82 T3 turbine housing, by the way. It's mine and it's already been repaired.

Boostdriven said:

Hx35/40 is popular with the diesel guys and some gas guys, its a set up that's been proven to work for years, so just because one guy who spends to much time on tuners and not enough time turning wrenchs says something doesn't make it a solid fact

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Right, because spool is all that matters and total airflow production has nothing to do with anything at all. If what you're stating were true every aftermarket turbo made for our cars would have a TD05H turbine.


What you're forgetting is that any time a wastegate is open, a good portion of exhaust flow is going to exit through the wastegate. On a setup running low boost, someone may benefit from a larger compressor if they don't mind the lag because the biggest portion of the exhaust energy is wastegated.

Now let's turn up the boost to 38psi and channel all of that additional exhaust energy directly at the small turbine wheel. Exhaust backpressure builds, EGT's go up, the car gets harder to tune, and you're making less power while doing more damage to the turbo by running that magical wheel combination.


Hell I have a customer right now who specified a .63 Garrett housing on his 7-blade HX35 and it turned out to be a complete dud, only gaining a few additional HP over a T04E60 Garrett that it replaced. The excessive turbine restriction giveaway is that the same wastegate setup which controlled boost fine on his 60-trim suddenly wouldn't stay closed with the HX35. The turbine backpressure had increased so significantly that the wastegate had a hard time staying shut as the RPM's climb.

...but what the hell do I know. I just f*ck around on the internet all day.

well, that is a pretty damn gnarly picture...