Holset Turbos, PART 6

[turbodsm18]

Teaser Pics.....Im giving myself two weeks to get it back together.....

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

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

Compressor cover is ceramic coated in high temp 2000* silver, the bep hotside, PR o2 housing, and FP manifold are all coated in 2000* black....All done by Stanley Distribution from Dsmtalk...

-Kevin-

 

[jrohner]

I did lower my upper end oil pressure but past 9K I'm actually wanting to maintain the 10 psi/1K rpm addage for proper oil pressure.

I've been told getting over 100psi of oil pressure is actually hard on bearings. I know it's a totally different type of engine but on my racecar (Ford V8), i had 35-40psi at every RPM and the engine ran solid for 3.5 years running 7-7500 RPMs (the lowest the RPMs ever got during a race was around 45000-5 grand). Everything I've heard about race engines has said 10psi/1k rule of thumb is BS.

 

[jking29]

I don't believe that oil pressure over 100lbs will hurt bearings. VW diesels run around 150lbs of oil pressure and run 1/2 million miles no problem. I had one that the relief valve stuck and it was pushing over 200lbs of oil pressure. It was enough pressure to start blowing up oil filters. When I pulled the engine down the bearings looked new and the motor had over 300k miles on it.

 

[JusMX141]

Believe what you want about engine bearings, but I know for a fact that too much oil pressure will destroy a journal bearing turbo in under 500 miles.

 

[Slippi84]

I don't believe that oil pressure over 100lbs will hurt bearings. VW diesels run around 150lbs of oil pressure and run 1/2 million miles no problem. I had one that the relief valve stuck and it was pushing over 200lbs of oil pressure. It was enough pressure to start blowing up oil filters. When I pulled the engine down the bearings looked new and the motor had over 300k miles on it.

Sounds like your talking about engine bearings while jusmx141 is talking about turbo bearings

 

[VETTE_50_TH]

For those running the 7/12 HX40, how would you compare the transient response between shifts time from that turbo compared say to a DBB Garrett turbo? Is it better, worse, and by how much? Just thinking how all the Time Attack cars run those BB HKS, or Garrett turbos, and seems no one runs journal bearing turbos? What are your feelings? Maybe i am having second thoughts....

James

 

[jking29]

Sounds like your talking about engine bearings while jusmx141 is talking about turbo bearings

Yes, I should have been more specific. I was talking about engine bearings, not turbo bearings. Big difference.

 

[dsm-onster]

For those running the 7/12 HX40, how would you compare the transient response between shifts time from that turbo compared say to a DBB Garrett turbo? Is it better, worse, and by how much? Just thinking how all the Time Attack cars run those BB HKS, or Garrett turbos, and seems no one runs journal bearing turbos? What are your feelings? Maybe i am having second thoughts....

James

Here's some transient response logs from a 2.0l saab. Not a dsm, but still the guy swapped from an gt3076r to a holset hx40 and runs in circuit races. And has been getting better results across the board. In that post there's a link to his build thread. He has a 10blade hx40 not a 12blade. The spool and respool difference is supposedly slight.

 

[VETTE_50_TH]

Thanks for the link Matt. Seems easy to say, i can stay with those big boys...at least turbo wise.

James

 

[Black_Bullet]

My Hx40 came in today. Seems to be in pretty good condition.
http://www.dsmtuners.com/forums/project-build-logs/325751-blackbullets-09-build-2.html

 

[turbotalon1g]

I have been gone for a while, and I will be too busy to get on here a lot.
But add another one to HX35 bolton dsms that are alive.

Also, someone/EVERYONE check out HPP racing or something like that, they make turbo kits for mustangs, guess what turbos they use, yes holsets in T3 housings.

Some guy local was selling one and told me they used holsets in there early kits with .63 and .82 AR T3 housings. sorry vendors.

 

[turbotalon1g]

Oh eyah, I did what mike 1992 and the original guy that put the nitrous jet in a fitting did.
It was simple take fitting that feeds turbo, put the line end against a cut off wheel or belt sander, spend $8 or less on .062 nitrous jet and behold your restrictor that does not leak.

After nights of search on HX35 oil pressure/restrictors, 1/16th was the most popular result with no ill effects 1/16" = .062.
I run from OFH, with disgustingly high oil pressure for a stock bottom end, no bs car.

 

[Fiascoxl]

almost finished...

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

at the "DUAL" rad caps, gotta swap over to my CSM t stat housing.

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

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

 

[Slippi84]

Was there really that little bit or room that you needed the half radiator? I have never really worked on a colt to see how the are with engine compartment room.

 

[kawboy]

EVO3 Waternecks also don't have the Cap

 

[turbotalon1g]

What O2 housings are good to use with the bolt-on housings?

 

[Fiascoxl]

Was there really that little bit or room that you needed the half radiator? I have never really worked on a colt to see how the are with engine compartment room.

yeah, only other way is to run a scirocco type but that involves cutting away some of the lower core support. with little car comes little engine compartment. and the deltagate is temporary, sucks that its only 35mm im trying to find a a used tial 38 now to replace it with.

 

[rampridersrider]

I just got a huge update on my Holset build. I posted it in another thread.

http://www.dsmtuners.com/forums/turbo-system-tech/319971-what-else-needed-hx35.html

 

[JWoodley]

Sneak peak at my Easter present to myself:

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

Notice the NT water pipe. I dented it on the back side and bent the bracket. I'm not running a spacer plate this go-round.

 

[projecTSI]

Beautiful!

 

[turbotalon1g]

ANyone?
sorry I dont have a big holset, but my HX35 in bolton seems really laggy.
I will try and get some logs up today and hopefully someone can help me out.

 

[andy4g63]

A little more details , or some examples, would be helpfull. Where do you get full boost, what housing do you have, some brief elements of your set-up. etc.

 

[turbotalon1g]

Thanks for the response, hopefully my new battery gets here today and I will be able to get some logs.

Setup: stock bottom end, HKS 264/272, crower springs and retainers, HX35 in bolton, 3" downpipe to cutout. DSMlink, E85 (E70ish blend), FIC 950s, boost at 20psi stock holset internal gate. 2G o2 housing ported to max by a professional not me. FP race mani, stock intake mani, 2.5 IC piping.

Basically it doesn't feel like Im hitting full boost until 5k, but I know i'm only running a max of 12* timing.

 

[andy4g63]

Seems fine. There are two things, that come to mind initially:

Huge boost/pre-turbo exhaust leak/
The Holset internal gate/ it might be too loose/, allowing it to open prematurely and not being able to build boost.

 

[95GSXCO]

Seems fine. There are two things, that come to mind initially:

Huge boost/pre-turbo exhaust leak/
The Holset internal gate/ it might be too loose/, allowing it to open prematurely and not being able to build boost.

Yes I have to agree my HX40 will hit 22 psi at about 4000ish if I remenber right and I know I have a huge leak. My wastegate is just held shut not hooked!