Holset Turbos, PART 9

[JusMX141]

Holset billet and cast HX40 wheels are identical in shape and design...the billet is made only to be stronger against wear and breakage in extremely dirty conditions or under very high boost levels. In other words, the durability means it could be machined thinner, but Holset kept the wheels the same size and shape for consistency.

Because billet is more dense with less air pockets in the material than cast, it's likely the the billet HX40 wheel is actually heavier than the cast wheel of identical size; but the weight gain is so minimal on a turbo of that size that you'd never notice a difference in back-to-back testing.

 

[forcefed86]

Im not gonna read forcefed's novel, but yes i know the definition of billet means of a solid piece of metal, which makes the wheel stronger, stronger so that someone can or could make thinner blade profile design as far as i understand. Thinner blade design = weight loss. Maybe not necessairly in oe applications. But id like to see a 35r vs a 35r hta wheel weighed. Doesn't have to be a 35r but of the se caliber comparison. I think you are correct in te case that cummins may not have made any changes to their cast vs billet, but id also like to see the weight difference. I wouldn't expect to see any change in weight necessairly from an OE turbo hx40 cast vs billet but i bet if you do compare garrett
Wheel vs hta there will be a weight difference there.

As far as my issue. Im using an external wastegate. I need to do a BLT for a sanity check. I think i just need a heavie spring perhapse so the gate doesn't open as early. I feel like im loosing pressure cause i opens to soon. Even though i have a MBC. My exhaust is not colapaed at all. Im switching to t3 at the end of the month when i get my manifold so we will see if its just something with the bolt on housing.

Yes, heaven forbid you read something.

Your probably blowing the gate open because of the retarded amounts of back pressure on a bolt on housing at 30ish psi. Get a stronger WG spring.

 

[Archer Fabrications]

Ya thats what i said.
Also switching to t3 in 3 weeks

 

[Archer Fabrications]

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Got one piece of the puzzle.

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^ the other is in the works thanks to cory (eviltsi) at STM!

 

[1glaserfwd]

Just got my 1g finished up and partially broken in via the motoman method. Took a short video clip through 3rd gear and on only 14psi this thing moves good! Gonna be straight banannas at 35psi!! Cant wait to snag my 2150s and hit the dyno, then the track shortly after! This is on a 2.3 also, spool on the .70 t3 is great!

https://www.youtube.com/watch?v=IZ67fgIZvxA

 

[D00kie]

So.... where can optional t3 exhaust housing be purchased at?

 

[Archer Fabrications]

Optional? The BEP? Get it from extreme psi or bep

 

[D00kie]

Optional? The BEP? Get it from extreme psi or bep

Yea, and it would have to be t3 flanged with vband. Im picking up a brand spanking new H1E for a steal, but it has the t4 twinscroll housing on it

 

[Archer Fabrications]

Yeah it's t3 and has 3" vband, it MIGHT fit one of those, i havent done my reading on the h1 holsets but go to extremepsi they have them.

 

[D00kie]

Yeah it's t3 and has 3" vband, it MIGHT fit one of those, i havent done my reading on the h1 holsets but go to extremepsi they have them.

Ill have to get the housing machined to fit

 

[WES_393]

Yea, and it would have to be t3 flanged with vband. Im picking up a brand spanking new H1E for a steal, but it has the t4 twinscroll housing on it

Before buying, I would at least pull the compressor cover (just remove the v-band clamp) measure the inducer. You want at least 58mm, but 60mm would be best. If it's something like 52mm then I wouldn't even bother.

And turbine housing will likely need to be swapped regardless. The H1E normally didn't use a wastegate, just a massive housing instead. Some even came as large even 22cm^2. Not very 4-banger friendly.

If the turbine is 64mm at the exducer, then it will fit HX40 housings such as the BEP options.

 

[Archer Fabrications]

If he needs vband chra clamp the bep housings won't work

 

[WES_393]

The compressor is what attaches with a v-band clamp. The turbine housing is held on with plates and bolts just like the BEP housings.

 

[D00kie]

Before buying, I would at least pull the compressor cover (just remove the v-band clamp) measure the inducer. You want at least 58mm, but 60mm would be best. If it's something like 52mm then I wouldn't even bother.

And turbine housing will likely need to be swapped regardless. The H1E normally didn't use a wastegate, just a massive housing instead. Some even came as large even 22cm^2. Not very 4-banger friendly.

If the turbine is 64mm at the exducer, then it will fit HX40 housings such as the BEP options.

I'll be sure to do that!!!!

Here's a pic of the #'s on the housing: 3527107 /H1E

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Now if I read correctly, this may me the 62mm? I've read so much I may just have crap mixed up

 

[JusMX141]

Should use a 3599642 compressor wheel according to the parts list, which would be a 54/83mm wheel, similar to the H1C.

In other words, a total dud. A HX35 compressor would make more airflow. You may want to get the compressor specs from the seller just to be sure, however....doesn't take 3 minutes to remove the cover.

 

[D00kie]

Should use a 3599642 compressor wheel according to the parts list, which would be a 54/83mm wheel, similar to the H1C.

In other words, a total dud. A HX35 compressor would make more airflow. You may want to get the compressor specs from the seller just to be sure, however....doesn't take 3 minutes to remove the cover.

Well dang, he accepted my offer of 200, thats why i figured that maybe i could make something work of it for a future build..... my sc61 is no where near maxed out on my current setup

 

[Archer Fabrications]

I like my hx40 way more than my old scm6152

 

[JusMX141]

Any of the available HX40's in a BEP bolt-on housing will outspool and outflow a SCM6152E.

Trouble is, you didn't get a HX40- you got a H1E which has many different compressors...some being less-potent than a 7-blade HX35.

 

[Archer Fabrications]

For those of you with hx40's how high are you guys revving? I am gonna build my head someday and havent reved past 7500 on 30psi on stock springs and head. Bc272's when does the hx40 run out of steam? Or is that question boost relevent. I plan on 36-40psi max for track days.

 

[JusMX141]

when does the hx40 run out of steam?

Ummm....never? This isn't a 16G, my friend.

 

[Archer Fabrications]

Well what are you and dave running to? This turbo really would be fine at 11k? It doesnt feel as fast to me doing highway pulls to 7500 maybe it's the stock intake manifold and bolt on crap.

 

[LandSpeed-DSM]

Atmosphere, displacement, boost and your combinations VE determines where the end of your rev range occurs.

You may have enough cam to run out another 1000+ rpm, but your intake and bolt on housing will cause you to choke earlier.

 

[Archer Fabrications]

Atmosphere, displacement, boost and your combinations VE determines where the end of your rev range occurs.

You may have enough cam to run out another 1000+ rpm, but your intake and bolt on housing will cause you to choke earlier.

Okay so for me personally.
Altitude-sea level
Boost-36
VE-108

 

[LandSpeed-DSM]

The VE I am talking about is not determined by a cell in your mis-calibrated SD table.. 108 is a value you are using to reach a target AFR.

A very rough way of determining your VE is to take your dyno plot, find peak torque and treat that as 100% VE. Then on either side of peak, every 250 or 500rpm take that value and divide it by peak torque and you'll get a percentage <100%.

You use that to make engine demand lines on the compressor map like this:

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*These were done for a 1.8L, with a cylinder head 15-20 years newer than ours. Some assumptions I think were made about the cam or a cam choice on the plot that goes to 9k.. but its the whole point of a bigger lift/duration cam to shift the higher VE section of the rev range later on.

It will give you a ball park estimate of what to expect. Notice how those lines have different slopes? That is because VE for each is different, and then displacement is being effectively multiple by PR, which is not wholly accurate but plotting it out as charge density times displacement would take a considerable bit of time and this is nearly the same.

 

[92 GSR-4]

I've been reading a lot of Holset threads and can't confirm this. I'm sure it'll be an easy reference for someone here.

Can the FP30 turbine housing be machined and mated to an HX-40? My current plan is to swap my FP3052 with something bigger and if I can mate the HX-40 to my spare FP turbine then I might be able to have the HX as a bolt-on affair. Hopefully my FAL fans and FP manifold play nice.