Dsm82hta vs dsm82htz vs xr71-64?

[Smokin80]

Morning

Are these three turbos essentially the same? And, what should you expect to see for spool on them? 2.0. 9:1. 280 cams.

Any info would be appreciated.

Thanks!

Garrett.

 

[gofer]

I'm not trying to be a smart-ass but honestly, if you're looking at buying one of these turbo's I'd get all your info directly from the source and not a public forum since they're the professionals that live and breath this stuff.

[email protected]
(972) 984-1800


That being said, here's what I've gathered since the DSM86 is the next turbo on my list of mods.

XR DSM 71-64 Ball Bearing Turbocharger

Xona Rotor has implemented new features in its XR line of performance turbochargers. The rotating assembly incorporates a variable preload angular contact bearing system. The variable preload system reduces bearing problems associated with ball sliding and scuffing due to high shaft speeds with insufficient bearing preload and adds an additional axial damping for the bearings. For expanded details on this groundbreaking improvement click here.

Xona Tech : Variable preload bearing system

Most performance turbochargers today use a single gas ring for sealing the shaft. XR turbochargers utilize twin gas ring sealing. This feature dramatically reduces gas and oil leakage rates for both the compressor and turbine ends of the rotating assembly. Since the sealing load is spread across 2 rings, wear rates are reduced and seal life is also extended. To complement this, large diameter oil slingers are incorporated into the shaft design at both ends further reducing splash oil at the piston ring seal location within the cartridge.

Xona uses high accuracy ABEC7 bearings with M62 advanced powder metal races matched to ceramic balls and high strength metallic ball cages. No melted ball cages here. These features result in vast improvements in high temperature operation and durability.

XR turbochargers offer connection flexibility with your choice of 7/16 inverted flare or straight 12mm metric oil inlet threads and a modular oil drain flange that allows for a variety of bolt spacing for the drain flange. Built into the oil inlet cavity of the CHRA is a large volume "last ditch" oil filter element that prevents oil contaminants from entering the bearing system and plugging oil passages within the turbocharger.

HTZ

HTZ represents an increase of 5-7% in choke flow over the range of compressor sizes as well as an increase in maximum tip velocity giving you an even wider operating range for your turbocharger when pushing the limits of flow and choke flow for your turbocharger.

I can't find any specific info from the "HTA" line of compressor wheels but IIRC it's a similar compressor wheel aero upgrade as the HTZ, it just offered an increase in airflow with the same size of compressor wheel. As far as spool's concerned, it's all relative. I'd say depending on your setup (not just taking into account displacement, CR, cam size) and what you consider full boost, some run low 20psi and others run 40psi, you're looking at 4k - 4.6k with the bolt on DSM XR71-64.

 

[Smokin80]

Thanks for the info.

I will be calling fp tomorrow. I just like to hear a non biased opinion on stuff as well

I'm going from an fp3065 that failed and hoping for similar spool times to that. So I am feeling pretty good that it will be similar.

Thanks

 

[Smokin80]

Ironically I called fp this morning and they really couldn't tell me how the turbos would react compared to the 3065. So I will just have to put it on and see. I'm hoping for 20psi by 4600.

Htz and 71-64 flow wise are the same. Hta will have 5-7% less choke flow as stated above.

 

[donniekak]

I have a dsm82htz, I see 20 psi by 4400 rpms, and 40 right around 5,000.

These are the differences. A dsm82hta was a Garrett 35r cartridge with an 82hta compressor in the fp bolt on housing. The dsm82htz, is the same Garrett cartridge with a 82htz compressor that flows more than the hta (71 lbs/min). The 71-64 is the same htz82 compressor and bolt on housing, but with fp's xona center cartridge, and slightly bigger turbine.

The reason I went with the dsm82 instead of the dsm86 is the bolt on housing. 71lbs/min is pushing what that housing can flow, an even larger compressor isn't going to flow much more without jacking drive pressure through the roof.

 

[Smokin80]

I have a dsm82htz, I see 20 psi by 4400 rpms, and 40 right around 5,000.

These are the differences. A dsm82hta was a Garrett 35r cartridge with an 82hta compressor in the fp bolt on housing. The dsm82htz, is the same Garrett cartridge with a 82htz compressor that flows more than the hta (71 lbs/min). The 71-64 is the same htz82 compressor and bolt on housing, but with fp's xona center cartridge, and slightly bigger turbine.

The reason I went with the dsm82 instead of the dsm86 is the bolt on housing. 71lbs/min is pushing what that housing can flow, an even larger compressor isn't going to flow much more without jacking drive pressure through the roof.

Thanks man!

Well....it sounds like this hta82 will do what i want it to then. 40PSI!! man i need to turn up the boost. Im just worried about blowing something up and i hate fixing things mid season. Might have to turn up the wick for the last couple runs of the hill climb this month.

 

[NB4G63T]

I've had both DSM82HTA and DSM86HTA and you're not living unless you're >30psi. Those turbos really come to life after 30psi and like Cory said, they spool in the 4400-4600 range or at least did on my setup with kelford 272 , magnus V3 and 2.0 alum LR. IMO you really can't beat Fp's bolton housing for a true street car, It's capable of 600-700awhp dependiing on setup and boost. I never had my 82hta in a T3 but I did switch mt 86hta over to a .85ar T3 that Fp sells and it worked as expected, I lost a little spool and some early torque but the top end is plain rediculas. I was having traction issues at the top of 3RD and before that I've never had any wheel spin in 3rd. That 86hta is on a bad mofo imo. Now I can't wait to try this new fp6466TZ out common 90lbs/min, I just really want to feel that power.

 

[daren_p]

Might be a little late on this but I've run the DSM 82HTA for a number of years. Spool for me was in the same ballpark as posted above, think 20psi is rights around the 4300 range. Coming from a 3052 think I lost 2 maybe 300 rpms in spool. If your coming for a 3065, you'll probably be pretty close on spool times. Typically run ~30-32psi as I just run pump (94) with some meth injection. Have hit 35-36psi & as say's they really wake up at that point (broke tires lose from a second gear pull when I hit ~5800 rpms)

 

[Smokin80]

So, looooong time old thread.

But figured I’d add some stuff just cause I’m trying to use this site instead of FB.

The turbo was spooling in my 2 litre at 4100 to 20psi! Crazy. However I degreed the cams this spring and the intake was advanced by 10 crank degrees so I’m pretty sure that was why. This also caused the car to fall on its face.

I have now installed the cams straight up and will be on the dyno April 5th to see what the changes do. Should be interesting.

I do love the 3582hta though.

 

[Boomdeeze]

So, looooong time old thread.

But figured I’d add some stuff just cause I’m trying to use this site instead of FB.

The turbo was spooling in my 2 litre at 4100 to 20psi! Crazy. However I degreed the cams this spring and the intake was advanced by 10 crank degrees so I’m pretty sure that was why. This also caused the car to fall on its face.

I have now installed the cams straight up and will be on the dyno April 5th to see what the changes do. Should be interesting.

I do love the 3582hta though.

Did you get it on the dyno? Still debating swapping out the DSM76 for the DSM82 to get it over the hump. Currently chasing 9's with the DSM76(54mm) but the DSM82 would make it a lot easier if I can get on the converter with it!

 

[donniekak]

Did you get it on the dyno? Still debating swapping out the DSM76 for the DSM82 to get it over the hump. Currently chasing 9's with the DSM76(54mm) but the DSM82 would make it a lot easier if I can get on the converter with it!

I made a hair under 600hp with my dsm82 at 30-32psi. At 40psi is felt like it only made another 50ish hp, but way more parts busting torque.

 

[Boomdeeze]

I made a hair under 600hp with my dsm82 at 30-32psi. At 40psi is felt like it only made another 50ish hp, but way more parts busting torque.

I am tickling the 40 psi mark now with the dsm76 which is why I am considering the swap, I feel like I am about maxing the turbo out. I was at 37psi last year and could not go any higher when it was on the dyno. It may have been my WG setup opening once it reached that high which I am swapping to the EBC setup with the two port method to keep it shut. It's either that or my setup can't handle more.

 

[donniekak]

With the small gt30 turbine I guarantee your exhaust pressure is 80psi or more at 40psi map.

 

[1cleangsx]

Hey Donnie would you say 32-34lbs is the sweet spot on these turbos? I’ve not gone over 34-35 because it’s so much fun as it is and I don’t want to break anything before I go to the track .

 

[donniekak]

I’ve only ran the dsm82 and it liked 30-35psi.


My car if a fully setup car though. I made 601 with a t3 3586 setup at only 24psi.

 

[1cleangsx]

Hey josh, those are pretty impressive times on that turbo I guess having a car set up right as Donnie said is where it’s at. I’m sure the spool is nuts on the dsm76, but it’s defenantly not bad on the 82, if your looking for one I’m sure there’s others on this board still running one. I don’t plan on ditching mine anytime soon, I’m hoping for 11’s this summer at bandimere speedway. It’s been 3 years since I ran the car there and the car has come a long way, anyways sorry for cluttering up the thread, good luck with your 9 second goal!

 

[Boomdeeze]

With the small gt30 turbine I guarantee your exhaust pressure is 80psi or more at 40psi map.

I wouldn't doubt it as I dropped a valve last year (Pea sized piece just broke off) at the 1/8 mark, doesn't help I was on single manley springs then. Freshly rebuilt head with 1mm OS SS valves and Kiggly HP beehives should help.

You know @donniekak sometimes you have to live life on the edge and let her buck!

Hey josh, those are pretty impressive times on that turbo I guess having a car set up right as Donnie said is where it’s at. I’m sure the spool is nuts on the dsm76, but it’s defenantly not bad on the 82, if your looking for one I’m sure there’s others on this board still running one. I don’t plan on ditching mine anytime soon, I’m hoping for 11’s this summer at bandimere speedway. It’s been 3 years since I ran the car there and the car has come a long way, anyways sorry for cluttering up the thread, good luck with your 9 second goal!

I've been searching for one for a year or so with no luck. I'm not dead set on swapping as this turbo has crazy spool and power! But hey, let's not forget the HTA76 can run mid 10's all day no problem so let me know if you have any interest!

 

[Smokin80]

Did you get it on the dyno? Still debating swapping out the DSM76 for the DSM82 to get it over the hump. Currently chasing 9's with the DSM76(54mm) but the DSM82 would make it a lot easier if I can get on the converter with it!

I made 565whp at 30psi. The cam timing change move spool from 4100 up to about 45-4600. For sure slower to spool but pulls way harder up top and picked up a lot of horsepower and made more torque(just higher in the revs).

 

[Boomdeeze]

I made 565whp at 30psi. The cam timing change move spool from 4100 up to about 45-4600. For sure slower to spool but pulls way harder up top and picked up a lot of horsepower and made more torque(just higher in the revs).

Those are some good Numbers at 30 psi! I'm auto so it's hard to compare dyno sheets but do you have one you can post up?

 

[Smokin80]

Those are some good Numbers at 30 psi! I'm auto so it's hard to compare dyno sheets but do you have one you can post up?

Attached dyno sheet is at 21 psi before any tuning, 26psi and 30psi. E80 with 15 degrees of timing. BC 280s installed straight up and a jmf intake. Mild port on head. 6 bolt.

 

[Smokin80]

Those are some good Numbers at 30 psi! I'm auto so it's hard to compare dyno sheets but do you have one you can post up?

Here is the dyno video. Sub my channel while you at it. Lol.

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[Boomdeeze]

Man that 30 psi pull is beautiful, give me your turbo.

 

[Smokin80]

Man that 30 psi pull is beautiful, give me your turbo.

Lol! Thanks

It’s good proof that running these turbos below 25psi is a bloody waste of time. They wake up huge after 25. We did a couple 22-23 psi pulls at it picked up a bit but as you can see from 20-26 was a savage gain. And there was only really some smoothing in the timing and fuel maps. Fun stuff either way.