DSM bolton .63 A/R HX40

[RyanR79]

Stupid question but what is the .55r if it's not a t3

 

[JusMX141]

DSM bolt-on, just as the thread title states.

All we've been discussing so far are DSM bolt-on turbine housings.

 

[RyanR79]

Sorry don't no the difference

 

[Steve93Talon]

Here's a link to a pic I posted long ago comparing the MHI, PTE, BEP, and FP bolt-on housing volute/entry area.

http://www.dsmtuners.com/forums/151207130-post58.html

I agree that the PTE housing, regardless of what the A/R is rated at, is nowhere near a true Garrett .63 T3 housing. The radius may be similar to the BEP, but without the symmetrical volute, it won't be as efficient. The only way to know for sure would be to compare them back to back, but considering that the BEP already exists for the HX40 application, I don't see the point.

One other thing that hasn't been discussed, and I don't think a lot of people realize, is that A/R isn't a fixed value that lets you compare any two housings. It's only relevant when comparing housings within given family (such as T3). Stating that a BEP bolt-on is .55 or a PTE bolt-on is .63 has absolutely nothing to do with a .63 or .82 Garrett T3 hotside, nor is it relevant to compare them to each other based solely on the A/R number. You simply need to take a look at a .86 GT2860RS housing next to a .82 GT35R housing to see that the bigger number doesn't mean squat.

The term A/R means area divided by radius. In other words, you could have a small area and radius, but end up with a numerically high A/R, or a large area and radius with a lower A/R. Unless you know the area of the volute, and the radius, you don't know the true size of the housing.

 

[black_gst]

yeah the bigger one is the .55 AR BEP mine doesnt look like that at all??? mine looks way more restricted, you sure that one wasnt ported?? l

now thats a big difference. is that for an HX35 or HX40

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[JusMX141]

Sorry don't no the difference

DSM bolt-on:

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T3:

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They're not interchangeable.

 

[RyanR79]

Thanks guys

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So this is a t3

 

[thilaksharma]

y do u guys for the $399 FP30/35 which require more work into it while u can get a FP31 which is only priced at $199 ?

 

[black_gst]

Thanks guys

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So this is a t3

yes it is

 

[Archer Fabrications]

now thats a big difference. is that for an HX35 or HX40

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Hx40

 

[Dert]

Here's a link to a pic I posted long ago comparing the MHI, PTE, BEP, and FP bolt-on housing volute/entry area.

http://www.dsmtuners.com/forums/151207130-post58.html

I agree that the PTE housing, regardless of what the A/R is rated at, is nowhere near a true Garrett .63 T3 housing. The radius may be similar to the BEP, but without the symmetrical volute, it won't be as efficient. The only way to know for sure would be to compare them back to back, but considering that the BEP already exists for the HX40 application, I don't see the point.

One other thing that hasn't been discussed, and I don't think a lot of people realize, is that A/R isn't a fixed value that lets you compare any two housings. It's only relevant when comparing housings within given family (such as T3). Stating that a BEP bolt-on is .55 or a PTE bolt-on is .63 has absolutely nothing to do with a .63 or .82 Garrett T3 hotside, nor is it relevant to compare them to each other based solely on the A/R number. You simply need to take a look at a .86 GT2860RS housing next to a .82 GT35R housing to see that the bigger number doesn't mean squat.

The term A/R means area divided by radius. In other words, you could have a small area and radius, but end up with a numerically high A/R, or a large area and radius with a lower A/R. Unless you know the area of the volute, and the radius, you don't know the true size of the housing.

I agree with this, I have a pte .82ar housing used on my 6235 and an unknown cast bolt on .63ar housing that was used on my turbonetics 57 trim and the 63 is way bigger than the 82, I was a little baffled when I first received it as to why it appeared so much smaller than the .63ar, now I know why.

 

[LandSpeed-DSM]

As I have tried to mention in a few of these housing comparison discussions..

Whether converting from Nozzle area in cm2 to A/R or comparing A/R between PTE or BEP... What will change this measurement the most and makes those numbers unusable in comparison is where do they take the centroid of the area that gives the radius?

There are no industry wide rules governing precisely how this measure is taken.

Where the cross-section area is taken in the volute/scroll determines both the numerator and the denominator in the "A/R" ratio. The cross section it's self becomes the area figure and the centroid is what will determine the radius used.

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One thing I've been curious about using to compare between like inlet flanges of purported similar A/R or nozzle area on a given turbine wheel is to use a temporary sleeveto seal the nozzle where it meets the wheel major diameter and fill it with a medium.

Then you could compare the internal volume with a common medium, say glass beads, or distilled water and atleast have an idea which is truly larger.

Though this wouldn't give you any concrete evidence as to which has the larger relative critical area or how much exhaust flow it could handle, it would be interesting to my mind at least.

 

[Dert]

That's a good idea, may be a good way to get a comparison if you don't have extras and a bandsaw to do like Justin did in the pics.