Jump to content
SAU Community

Recommended Posts

currently been thinking about upgrading my HKS GT-RS turbo on my R33 GTST. im after the 320 rwkw make but dont want a laggy ass turbo. Currently making 260rwkw and bored of it.

What turbo's have you people seen make 320rwkw without too much lag (preferably HKS turbos). considering the HKS 3040 but not too sure on how it goes.

any help/dyno graphs will be appreciated.

Link to comment
https://www.sau.com.au/forums/topic/105432-upgrading-turbo/
Share on other sites

320rwkw shouldn't be difficult to achieve with the HKS3040R or Garrett equivalent provided you do have a built engine. I think there are a few people on here who can personally vouch for that...

I've got a GT3040R on my R33 making around 280rwkw on 17psi (see dyno graph below). I've only got a std bottom end, so I haven't really pushed the limits of the turbo too much at this stage, but there's definately potential to make a lot more power.

Obviously it's not going to be as responsive as your current set up, but full boost by just over 4000rpm isn't too bad when you making approx 300rwkw.

Hope that helps :rolleyes:

post-10992-1139663951.jpg

Link to comment
https://www.sau.com.au/forums/topic/105432-upgrading-turbo/#findComment-1942129
Share on other sites

The Garrett GT3040R is rated is 600hp.

SEE HERE

I also forgot to mention that i have the 0.82a/r turbine housing, so I guess you could go for the 0.63a/r if you wanted less lag, although power would come on like a light switch which would make traction a bit of a problem. The 0.82 is nice and progressive.

Link to comment
https://www.sau.com.au/forums/topic/105432-upgrading-turbo/#findComment-1943555
Share on other sites

Wouldn't the 0.63 choke the top end too much and stop you from getting to 320?

What about the GT2835 Pro S with the 0.87 rear housing? That should get you there.

What was B-Man running when he had 330rwkw? Was that the 2835 or the 3040?

Link to comment
https://www.sau.com.au/forums/topic/105432-upgrading-turbo/#findComment-1944036
Share on other sites

Wouldn't the 0.63 choke the top end too much and stop you from getting to 320?

I used to think that 300+ would be pushing it with the 0.63, but after seeing Wilchs results in the rb25 dyno thread - i.e mid 270's @ 16-17psi with a .63 GT30R on rb25 w/std internals (I think?) - I guess 300 could be possible with a little more boost and a rebuilt engine.

What was B-Man running when he had 330rwkw? Was that the 2835 or the 3040?

I think it was a HKS3040R from what I remember when I was researching a while ago (may be wrong)
Link to comment
https://www.sau.com.au/forums/topic/105432-upgrading-turbo/#findComment-1944288
Share on other sites

1.0 Japanese PS = 0.98632 BHP

actually PS is not a japanese measurement. i dunno where you got that from but it's the (old) german standard of horsepower. it stands for Pferdestärke which i am quite positive is not japanese. basically means horse power in german.

Link to comment
https://www.sau.com.au/forums/topic/105432-upgrading-turbo/#findComment-1945350
Share on other sites

That had a lot of stuff done to it to get that.

An R33 RB25 head isn't the most amazing piece of gear and it's still only 2.5 litres.  Imagine how peaky 300-350rwkw would be.  Sounds ilke a waste of time if you ask me.

I'd agree. Much over 300rwkw and its gonna be peaky.

My setup (in my opinion) with the 600hp GT30 was as late as i would want a turbo to come on (4200/4500rpm/17psi)

With a redline of high 7000's thats not the "greatest"

Hence why im RB26, aiming for 330rwkw but rather than 4500rpm, it'll be more like 3500rpm, with a MUCH broader span of power, with 240rwkw in before 3000rpm (where rb25 was more like 150rwkw) based on results of other cars with a setup similar to me

Link to comment
https://www.sau.com.au/forums/topic/105432-upgrading-turbo/#findComment-1945579
Share on other sites

Turbo's aside...

Have you considered using an RB30 bottom end?

If I ever had to rebuild my engine, I'd seriously contemplate going that way as the RB30 bottom end should definately give a much broader power band than the RB25. Add in a GT30 or GT35 turbo (with the usual supporting mods) and 320rwkw should be a formality. The bonus being that the power is usuable over a large part of the rev range as opposed to having peak power at the top of the rev range and not much else for the rest of it if you had the same power with the RB25.

Link to comment
https://www.sau.com.au/forums/topic/105432-upgrading-turbo/#findComment-1946895
Share on other sites

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...