Variable AR turbine
 

Now I am sure that most of you have seen something like this before, but I figured I would repost it for any way.

http://www.theturboforums.com/smf/in...?topic=45148.0

Now the first bit is just blocking half of the turbine to make a smaller ar turbine, but later in the thread Pg 15 i think there is a pic of the one idea, there is one where they add a waste gate to make the turbine ar variable. In essence it is a poor mans variable vain turbo. That is easier to control then a variable vain setup as well.

Where I see this being use full for HMT'ers is on street d's where quick boost = fun ride. At the track we have antilag to build whatever boost we need, but this would allow a 1.5L D to run an HX-35, get good spool, and big HP, but maybe I'm just a O0

Re: Variable AR turbine
 

Easier to control than a variable vane setup? What are you smoking, Willis? Most of the variable vane turbos take PWM control, meaning you can use an AVC-R or Greddy Profec or that $99 EBC guy who is currently a sponsor to control the turbine AR. It's cake, dude.

Re: Variable AR turbine
 

yeah vatn turbos arent hard to setup

Re: Variable AR turbine
 

Well I guess you learn something everyday, I new that they took PWM control, but I did not realize that any of the above would give adequate boost control. :1

Well it will still take heat better then variable vain setups, as iirc only porsche has a variable vain setup on a gasoline motor due to the egt issues.

Re: Variable AR turbine
 

Any of the Borg Warner VGTs are rated to 1050 degrees C, your engine will melt first.

I'm not an expert on anything else , but there's a KA-T 240 in Knoxville running some bastard dieseled out GT45 with variable vane - has a GT42 compressor and a HUGE 1.53 103mm turbine wheel. Using an AVC-R to scroll it down all the way it makes positive pressure at 2500 rpms, and has been running for 3 years now. It might have 9-10K miles on the setup, it's driven on weekends.

Re: Variable AR turbine
 

my vgt likes to stick and make lots of egts with very little boost then tons of boost blowing off couplers. It hates sitting over the winter. Truck coughs and sputters, blows black and blue and sounds like a dead miss when it fucks up :8

Re: Variable AR turbine
 

Thats just because its a Ford :P

Re: Variable AR turbine
 

+1 thats normal operation for a ford

Re: Variable AR turbine
 

You have a Powerstroke? How many rear ends have you put in it? How many transmissions?

Re: Variable AR turbine
 

trans is a 5r110, tough as ----, rear end is a sterling 10.5, over twice as strong as a dana 60. If you put big gears in it (488's 513's) the pinion gets pretty small and can stip gears with big power, I have acually seen guys brake the welds on the tubes going into the center section and point the pinion at the ground again tough as ----, What were you getting at again? :P

I'm running well over 1000 ft pounds through mine and it loves it, my trucks gay compared to alot of them :8

Re: Variable AR turbine
 

It's the Dodge trannys that have issues...

Highroller: you're still running a stock turbo??? Weak sauce. :1 I just got my GT42 from a Detroit 60 rebuilt, now i just need some 220v and a garage so I can get the twins on my beast. Stupid moving to Alberta... :X

JD: Cool too know about the boost control on the VGT in the 240, I may try that in the future. Not the KA-T but the VGT

Re: Variable AR turbine
 

Goforth's got an '03, it's been through two rear ends and one transmission. I don't know the particulars on it as I'm not a glow-plug head, but it's a manual trans if that matters.


Sweet. Since you're diesel folk, what years do the Borg S372 come on the 60-series? It replaced the 42R, didn't it? Do you know any details of turbine AR, BW part numbers, etc?

Re: Variable AR turbine
 

stockish, next step will be bigger turbo and sticks >:D

That trans doesnt suprize me but what the ---- is he doing to the rear diffs, I've seen guys go into 10's on 35's with 4dr one ton trucks and still have a stock rear ends ???

I dont know :P

Re: Variable AR turbine
 

One of the 80-100 horse reflashes with the usual minor DP/exhaust upgrades, and he drives the wheels off of it. And it is a 4dr 1 ton truck. :P

Re: Variable AR turbine
 

theres a thread with my cab lifted off my frame here somewere when the arp headstuds went in if you interested in diesels now :P

Re: Variable AR turbine
 

nice!!, did you get your head gasket fixored?

Hows Alberta treating you? What are you doing there?

Re: Variable AR turbine
 

I don't know the year for sure but I believe it was around '01-'03, they never had the 42R, just the journal bearing 42 (which is what I have) Now from all of them that I have seen (both in the borg and the garrett) run a T6 foot print, in the 1.2x+ AR. My 42 has a 1.38AR T6. So for use on anything smaller then about a 400cid motor you will probably have to change the hot side. I will ask some of my former truck shops about bw part numbers. I also have a holset HT60 off of a Cummins N14, which is bigger yet. I would Say S476 area.

Re: Variable AR turbine
 

Groovy, anything you can find out would be appreciated.

I've seen a couple different flavors of S475 in the ~$520 range with 1.30 T6 housings. Makes me want to do a 408 in a Mustang.

Re: Variable AR turbine
 

Yeah got a stock cummins .5mm overbore HG, ARP Studs, and 60# exhaust springs, 4K kit, and some custom sticks 6X16 sticks. Now I just need to find time to put it all in. Alberta is Flat, Windy, and I currently have no Garage, if this wasn't such a good opportunity, I would be back in BC in a hart beat. I am learning the Mobile/Heavy Equipment, AC/Heating business in hopes to start my own thing (again) in a couple years in Kelowna. I am going to try to move again (still in the Calgary area) before the snow fly's to a place with a garage, or if this snap on BS gets dealt with by then, I will just buy a place. As soon as I get a garage, the dodge will go under the knife. I have been toying with the idea of getting a CJ-7 chassis, and swapping the dodge drive train into it, as the dodge body is nothing special, and I am assuming will need a fair bit of work to pass prov inspection.

Re: Variable AR turbine
 

I have that same thought everyday with the HT-60, I have access to a built 355 (forged rods, pistons, crank, 4bolt mains, world industry heads, ect...) just needs an intake mani, and I need a chassis, tranny, and time. The last one is the killer as I have too much on my plate as is. We will see what the winter / spring brings.

Re: Variable AR turbine
 

you will need some roids and your old lady will need some silicone tits and a coke habit to fit in in kelowna. Dont forget the 450.00 dollar jeans :P

Re: Variable AR turbine
 

I was thinking about Winfield, (halfway between Vernon and Kelowna) I mean really look at my dodge I am way too redneck to actually live IN the pretentiousness of Kelowna. ;)