Jump to content
SAU Community

Recommended Posts

Very interesting read. Also interesting to note those are almost the exact same measurements of my compressor (60mm inducer, 84mm exducer). I wonder if that test will change some minds? :P

*Edit--I just noticed the GT35r they compared it too was a twin scroll housing. Are most of the GT30/35's out there twin scroll?

To my knowledge none of the GT30/35's are twin scroll in their off the shelf format.

ATP modifies the T3 TS GT32 ex housing to suit the 3071/76/GT35. Full-race also is putting together T4 TS footprint ex housings for the GT35. In the above test they are testing a T4 TS GT35 with a T4 TS BW - so its a valid comparison. Presumably both of these twin scroll turbo's will outspool and have better transient response than a generic single scroll GT35.

Edited by juggernaut1
  • Replies 198
  • Created
  • Last Reply

Top Posters In This Topic

I think it's actually the compressor and turbine design in general. The B-W's with out the extended as well as there cousins (holsets) all have the same characteristic of really outperforming thier garrett counterparts at higher boost levels. I guess it might have to do with originaly being designed to run on a diesel at over 2 bar. I think most of them are mapped to 3 bar. I'm thinking about getting meth injection and punching the boost up to around 2 bar. I'm at 1.7 now with under 20 counts of knock (again, stock bottom end).

**Cliff notes for anybody who didn't feel like clicking that link that juggernaut posted-- Borg-Warner S300 spooled exactly the same if not a little quicker than a twin scroll GT35r and made around 15 more hp starting from the midrange on up on back to back dyno runs on the same car (Evo).

that is a dinosar :P it is of a 6.7 litre cummins powered earth mover. it was designed to diliver a scud of torque at very small rev range. about 2600 to 3200 rpm. it has a strange anti surge ring machined into the compressor housing and the compressor wheel has notches that fit into the ring. on an rb25 it would see boost at around 5500 to 6000 rpm :)

the one you want to go for is a hx35 ;) not one of these

aaaaahhhhhh, i thought it sounded fair big lol.

thanks heaps for the info mate, dont worry i am definatley going a hx35 :D .

just hunting one down at the moment.

thanks everyone for the help,

btw american dollar going down meening these bad boys are getting cheaper for us wooohooo!

im watching the news everyday, the AUSD gets 1cent stronger everyday lol.

Gezza

Personally I think the BW's are the ones to watch , IMO along a bit more modern lines than HE/HX35 Holsets .

Actually it's just occured to me that if you people want to play with cheapish diesel turbos why not revert to the old chestnut T04/60-1 ? There is actually a range of compressors in that family so you don't have to use the 60 trim version if you don't want to .

T4 turbine housings are common in single or twin entry and "T3" or T4 mounting flange sizes .

It's even made with a large frame ball bearing option if you like .

A .

Disco, you refer to them as "old", but they are out performing the "new" GT series in every way I can measure--or do you disagree on that point? Again, looking for good honest opinions. I like having a nice intelligent discussion about these things, so please don't think I'm being argumentative.

I do agree though that the B-W's come on a couple hundred RPM quicker and flow a lb or two more up top. They are a bit more modern design, but what is that performance difference when I can get a used Holset for $200USD compared to a B-W for $1200USD new? I'd go B-W all things being equal, but I'm not rich :banana:

Edited by Cjmartz2k
  • 2 months later...
Evo + HX52 = skyline in the rear view.

You are clearly assuming/hoping that the Skyline isn't similarly equipped :P There were Skylines running around on the streets of Japan ten years ago with the same power or more than what you'd make with an EVO with an HX52.

bozodos - What do you mean by the appropriate sizes? Suitable turbine housing size or..? I treat the HX35 as roughly equivalent to a GT30R.

Power to weight ratio........ 4wd advantage for the non R types

Quite keen to see these videos of 7s runs?

bozodos - What do you mean by the appropriate sizes? Suitable turbine housing size or..? I treat the HX35 as roughly equivalent to a GT30R.

Quite keen to see these videos of 7s runs?

Ask and ye shall receive:

Don't mis-quote me. I never said that Skylines don't have potential. Right now I am in the process of building my Evo up (melted a piston and decided to go bigger) to match up with a 1000awhp sexy beast of a GT-R.

They are running Garretts, and that EVO is tube front - there are no tube frame GTRs that I am aware of and Shep last I heard may have given up on the AWD chase.

Edited by Lithium

To add to that.

For someone looking to build a preformance car on a budget these are the turbines to use. I have a 800+HP capable turbine and I got it for $100 US + shipping. The GT35R I had on previously was $1300US + shipping and is only rated to 650HP at the top of the map where I was not boosting.

The car we've been tuning recently is a stock 25 block with a 26 head boosting 1.7 bar on the HX52 and maxing out 740CC injectors.

Edited by radix

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now



  • Similar Content

  • Latest Posts

    • Have a look at that (shitty) pic I posted. You can see AN -4 braided line coming to a -4 to 1/8 BSPT adapter, into a 1/8 BSPT T piece. The Haltech pressure sender is screwed into the long arm of the sender and factory sender (pre your pic) into the T side. You can also see the cable tie holding the whole contraption in place. Is it better than mounting the sender direct to your engine fitting......yes because it removes that vibration as the engine revs out 50 times every lap and that factory sender is pretty big. Is it necessary for you......well I've got no idea, I just don't like something important failing twice so over-engineer it to the moon!
    • Yup. You can get creative and make a sort of "bracket" with cable ties. Put 2 around the sender with a third passing underneath them strapped down against the sender. Then that third one is able to be passed through some hole at right angles to the orientation of the sender. Or some variation on the theme. Yes.... ummm, with caveats? I mean, the sender is BSP and you would likely have AN stuff on the hose, so yes, there would be the adapter you mention. But the block end will either be 1/8 NPT if that thread is still OK in there, or you can drill and tap it out to 1/4 BSP or NPT and use appropriate adapter there. As it stands, your mention of 1/8 BSPT male seems... wrong for the 1/8 NPT female it has to go into. The hose will be better, because even with the bush, the mass of the sender will be "hanging" off a hard threaded connection and will add some stress/strain to that. It might fail in the future. The hose eliminates almost all such risk - but adds in several more threaded connections to leak from! It really should be tapered, but it looks very long in that photo with no taper visible. If you have it in hand you should be able to see if it tapered or not. There technically is no possibility of a mechanical seal with a parallel male in a parallel female, so it is hard to believe that it is parallel male, but weirder things have happened. Maybe it's meant to seat on some surface when screwed in on the original installation? Anyway, at that thread size, parallel in parallel, with tape and goop, will seal just fine.
    • How do you propose I cable tie this: To something securely? Is it really just a case of finding a couple of holes and ziptying it there so it never goes flying or starts dangling around, more or less? Then run a 1/8 BSP Female to [hose adapter of choice?/AN?] and then the opposing fitting at the bush-into-oil-block end? being the hose-into-realistically likely a 1/8 BSPT male) Is this going to provide any real benefit over using a stainless/steel 1/4 to 1/8 BSPT reducing bush? I am making the assumption the OEM sender is BSPT not BSPP/BSP
    • I fashioned a ramp out of a couple of pieces of 140x35 lumber, to get the bumper up slightly, and then one of these is what I use
    • I wouldn't worry about dissimilar metal corrosion, should you just buy/make a steel replacement. There will be thread tape and sealant compound between the metals. The few little spots where they touch each other will be deep inside the joint, unable to get wet. And the alloy block is much much larger than a small steel fitting, so there is plenty of "sacrificial" capacity there. Any bush you put in there will be dissimilar anyway. Either steel or brass. Maybe stainless. All of them are different to the other parts in the chain. But what I said above still applies.
×
×
  • Create New...