Holset Turbos, PART 7

[JusMX141]

Yeah, it looks like he could've benefit from a BEP .70 v-band housing rather than the stock 12cm HX35 housing for better fitment, but it's on and boosting...so he's making almost 500whp while only spending $300 on his turbo.

I vote the Holset HX35 to get the "Bang For The Buck" award for the decade of 2000-2009. I'm nearing thirty of these rebuilt and sold to customers without a single complaint of reliability, spool, or peak horsepower gained. Can't say the same for Garrett / PTE.

 

[Hubbard 0]

good stuff, it looks like he is using a stock T3 hot side. I guess the turbine to exhaust manifold flange is square perfectly so you can rotate it 180* so EVOs can face it towards the driver's side? Or did he have to do a lot more than that. I'm about to check out that link. I'm always peeking around EVOm.net but never find much technical stuff like here on tuners.

Because theirs mounts opposite of what ours does, you'll see he had to make his own manifold with a significant angle on the turbo flange so it'll fit.

In our cars, the hotside tucks underneath the manifold close to the block. On an Evo it's going to stick out a lot and run into clearance issues with the radiator.

 

[Gooberlog]

Ah, gotcha!

 

[dnhieu]

first off im not really quite sure if i have a hx40 or a hx35 but im trying to maximize my setup. im running a BEP housing and have all supporting mods but my car seems really sluggish around 7k. all my mods in my profile are up to date. im pretty sure that im over running my maf (still on a 2g) and plan on upgrading to v3 and gm maft at some time.

also, what kind of cams are you guys making good power with? i have bc280's right now but after reading so many bad reviews about them and the lack of power im pretty set on getting rid of them. what do you guys recomend?

 

[thecman02]

first off im not really quite sure if i have a hx40 or a hx35 but im trying to maximize my setup. im running a BEP housing and have all supporting mods but my car seems really sluggish around 7k. all my mods in my profile are up to date. im pretty sure that im over running my maf (still on a 2g) and plan on upgrading to v3 and gm maft at some time.

also, what kind of cams are you guys making good power with? i have bc280's right now but after reading so many bad reviews about them and the lack of power im pretty set on getting rid of them. what do you guys recomend?

What are your horsepower goals and powerband goals?

 

[dnhieu]

as much as my tuning will lead me! i would like to get the best power band/power combo possible...

i want a setup that works. with my current setup my powerband is limited to 7k and it falls on its face.

 

[Black_Bullet]

Mines is on the car- Hx40 56mm billet 6/12blade, & BEP bolt on housing.
Spools pretty good, 24psi reached about 500-600 rpm slower than my e316g, which is low 4k range w/ kelford272s & Hawver intake manifold. As far as the butt dyno goes, it doesnt have the little quick stabs like the 16g but once at full boost it has a lot more torque steer. At the same psi, definite increase in power above 6k over my e316g. Decent turbo for the cheap price.

Return line- ( stock return line cut two inches from flange, blue hose clamped on. Has push lock fitting for upper flange.)

You must be logged in to view this image or video.

You must be logged in to view this image or video.

 

[kp116]

first off im not really quite sure if i have a hx40 or a hx35 but im trying to maximize my setup. im running a BEP housing and have all supporting mods but my car seems really sluggish around 7k. all my mods in my profile are up to date. im pretty sure that im over running my maf (still on a 2g) and plan on upgrading to v3 and gm maft at some time.

also, what kind of cams are you guys making good power with? i have bc280's right now but after reading so many bad reviews about them and the lack of power im pretty set on getting rid of them. what do you guys recomend?

Are you still on a stock intake? If so that would probably be the reason why its sluggish around 7k.. My bolt-on hx40 made peak power right around 7k then died off after that with a stock intake.

 

[Yngvar]

Is there any one running Hy35? All I read about is HX35

 

[JusMX141]

Is there any one running Hy35? All I read about is HX35

4g63awdhonda is. His profile says HX, but his turbo is a HY. I should know....I built his setup.

 

[Gooberlog]

Justin,
I saw on the link to the EVO forum that a lot of the EVO guys were talking about running the HY35 instead, but i was reading on there that the main difference from the HY35 to the HX35 is the HY has a smaller turbine housing? If this is true, couldn't anyone who wanted to run a BEP housing on a dsm just source a HY35 instead of a HX35? I've been checking on the cummings boards peeking around at turbos for sale, while there are quite a few '98.5-'02 Cummins 5.9L with manual trans, it would seem that it would be easier to find one off of an auto. I feel like there were other reasons that i read in the Holset threads 1-7 that deterred dsm guys from running the HY35 off of the automatic cummins trucks, i just can't think of it now. I myself am looking to set up a 7blade HX-35 sometime next year to meet my goals.

 

[aero_sallee]

Justin,
I saw on the link to the EVO forum that a lot of the EVO guys were talking about running the HY35 instead, but i was reading on there that the main difference from the HY35 to the HX35 is the HY has a smaller turbine housing? If this is true, couldn't anyone who wanted to run a BEP housing on a dsm just source a HY35 instead of a HX35? I've been checking on the cummings boards peeking around at turbos for sale, while there are quite a few '98.5-'02 Cummins 5.9L with manual trans, it would seem that it would be easier to find one off of an auto. I feel like there were other reasons that i read in the Holset threads 1-7 that deterred dsm guys from running the HY35 off of the automatic cummins trucks, i just can't think of it now. I myself am looking to set up a 7blade HX-35 sometime next year to meet my goals.

You can't swap the BEP turbine housing onto the turbo. The housing is attached to the center section with a vband on the HY35 instead of a bolt down flange like the BEP and HX35.

 

[Gooberlog]

You can't swap the BEP turbine housing onto the turbo. The housing is attached to the center section with a vband on the HY35 instead of a bolt down flange like the BEP and HX35.

Yup, that's what it was. I couldn't remember. All I kept thinking was that i wanted to run a HX and not a HY, more for compatibility and less for performance reasons. Thanks for the reminder and Merry Christmas.

 

[JusMX141]

Justin,
I saw on the link to the EVO forum that a lot of the EVO guys were talking about running the HY35 instead, but i was reading on there that the main difference from the HY35 to the HX35 is the HY has a smaller turbine housing?

The HY's turbine wheel is much smaller, too. The HY's turbine inducer doesn't have the large, extended tips like the HX35's turbine does, and the HY's turbine is sized about the same as a Garrett T31.

A HY35 uses the same 7-blade compressor as the newer HX35's, but with the 9cm T3 housing and smaller turbine I can't see how the HY35 could ever possibly max out the flow potential of the 7-blade 35 compressor. This is why the HX35 is more popular and has a higher demand. The HY still uses the same center housing design as the HX35/40, so it's just as durable. All of the HX oiling requirements apply to the HY.

A HY35 would be a great choice for someone on a budget who wants HX35 performance but doesn't ever plan on running over 25psi or 28psi. You literally buy the HY35, weld the flapper shut, bolt it on an externally-gated T3-flanged manifold, and fab your own o2 housing. It's literally the lowest-budget way to go....you should be able to buy the manifold, turbo, and fab your o2 housing for $400-$500 total investment.

 

[Gooberlog]

Thanks for clearing that up for me Justin. I have read every drop of info about holsets on this site that i can find, but being on here daily kinda makes some of the info just mush together in my memory at times. When i figure out what i want for my set up, i research the crap out of it and erase any info from my memory that is not related to that set up. So i remember reading about that stuff, just couldn't remember exactly what i read.

I plan on going with a HX-35 7blade turbo. I want to use a BEP bolt on turbine housing and mate it with my SBR ported 2g exhaust manifold which i read should work with some massaging of the water pipe. I want to go the route of the BEP because the SBR 2G manifold is a pretty decent piece and don't want to replace it if i don't have to. Plus money is tight which is another reason to pursue this budget turbo. The second reason i want to run the BEP turbine housing is i don't want to have to change out my DP and fab or source a o2 housing. I already have a Punishment Racing o2 housing set up for a 44mm v-band waste gate to be dumped. So i have the manifold, have the o2 housing, so i feel with my goals in mind it would be best to set up an HX35 with the bolt on BEP turbine housing.

My goals with the holset set up will be around 450 awhp on pump gas and between 500-550 awhp on race gas or pump with methanol. My car currently weighs 2700 w/o driver and i would like to eventually use this turbo to run low 11's on pump and dip in to a high ten with race gas or meth. I do understand that this turbo is quite heavy compared to my modded 14b and that once i get pass mid 11's i will have to add a cage which will also add weight. I plan to get the car down to a race weight of 2800 w/ driver including the weight of a heavy Holset and a cage. From what i have searched on the power results of the holset turbos, it seems that a 7 blade HX35 will meet my goals the best. I do understand that i will be partially limited by the BEP housing over a T3 setup as to my power results and lbs per min flow and i may need to readjust the set up to that direction to reach these goals. What is your take on this? BTW: it seems the word is out that we are using these turbos on DSMs cause it seems like the average HX35 on the cummins forum is going for $300+ S&H, which is more than about 6 months ago.

 

[Pirrofab]

So while I was staring at my 1g up on stands waiting for spring I started thinking about how I'm going to finish the oil return on the Holset 35 for my car. So much design has been put into the correct size and angle of the drain but what if we just made it so it could be straight? Some manufacturers like volvo have a casting in the block itself for the oil drain to drain back into the crankcase. well being as thats a bit in depth what if the pan was modified to be similar in design? My idea is to fab up an extension on the oil pan in the same spot as the actual drain flange except it would allow for the oil drain tube on the turbo to point straight down without any bends. The extension on the pan could have an angled bottom with or without a baffle inside of it to help drain the oil back into the oil pan. It could also be made narrow enough to clear oil pan bolts or made with cutouts to allow access the the oil pan bolts. My fabrication skills lack the tools and supplies but the idea is there for it if anyone would like to try this out. Or, if it has been done before has it been succesful. This would consume some time but if someone is looking to pull a motor or install one a project like this may be alot easier.

Merry Christmas everyone.

 

[LiquidX]

I know that 2 45* angle fittings will make the line run straight. The only bends are in the fittings and seems to be the best solution. I don't know how well it will clear the pan though if using recomended -12AN line.

 

[dan2288]

Anyone have any pics of what to do to the coolant lines when installing a holset? Just want to know what I am doing before hand.

 

[Black_Bullet]

Anyone have any pics of what to do to the coolant lines when installing a holset? Just want to know what I am doing before hand.

The one on the water pipe, I put a bolt in mines w/ teflon tape..

 

[dan2288]

could you just connect the two turbo coolant lines together?

 

[nytescion]

Thats what i did. Just use some hose and connect the two.

 

[JusMX141]

Thanks for clearing that up for me Justin. I have read every drop of info about holsets on this site that i can find.....So i remember reading about that stuff, just couldn't remember exactly what i read.

Oh trust me, there's more info out there than I could ever remember- it's actually seeing these things as you're rebuilding them that makes you remember what's what.

 

[Pirrofab]

I know that 2 45* angle fittings will make the line run straight. The only bends are in the fittings and seems to be the best solution. I don't know how well it will clear the pan though if using recomended -12AN line.

Well that was my concern. I know it can be done using fittings but the larger recommended line i thought didn't quite fit well. thats why I figured if the pan had an extended section with a fitting on the top piece of the extension it could just drop right down.

Does the drain kit that sbr offers for the holsets work or is it to small? What has the success rate been with the guys that are using the t25 return line that has ben cut and sectioned with the oil resistant rubber hose?

 

[andy4g63]

I am sure you've read this thread, but here is my solution.. It is post #127 on page 5 with pics....

http://www.dsmtuners.com/forums/tur...rbo-users-your-oil-drain-may-too-small-5.html.
Try and keep straight. That is the key.. I had a 45* fitting off the turbo and didn't like it. The only thing. your mani, may not allow you to run it straight, then use a larger-12; -14 line.

 

[darkhorizon]

My HX35 is still going strong after 2 seasons of a ton of abuse.

No turbo timer, a few overboosts, a few blown charge tubes at max boost, many "un turbo timed" key offs.

Its a truly unbreakable turbo, and I am currently just intercooler limited from cranking out another 50-70whp from it.

That being said, I am looking forward to going VGT next season, so my ~10,000 mile hx35 is up for sale here soon.