Jump to content
SAU Community

Hks Gtrs Rb20det


RedDrifter
 Share

Recommended Posts

Ok I have a few simple q's here.

At the moment I have an its Turbo wich makes good power (approx 230rwkws) but my god its a laggy beast. I get the kick in the back at 4500rpm and dont get full boost 16 psi till 6k

I want to still be able to achieve this power level but I would like some little mid range back.

The HKS GTRS seems to be the way I am leaning towards.

How laggy are these on the RB20?

And I have heard they are good for max 250rwkws?

Is there anything else I would need to know about it?

My current mods are:- RX7 550cc injector, Blitz FMIC, bosch 040 fuel pump, Z32 afm, Remapped ecu, Oil catch can, etc so supporting this sorta power is fine.

Thanx guys. :P

Link to comment
Share on other sites

  • Replies 45
  • Created
  • Last Reply

Top Posters In This Topic

Ok I have a few simple q's here.

At the moment I have an its Turbo wich makes good power (approx 230rwkws) but my god its a laggy beast.  I get the kick in the back at 4500rpm and dont get full boost 16 psi till 6k

I want to still be able to achieve this power level but I would like some little mid range back.

The HKS GTRS seems to be the way I am leaning towards.

How laggy are these on the RB20?

And I have heard they are good for max 250rwkws?

Is there anything else I would need to know about it?

My current mods are:- RX7 550cc injector, Blitz FMIC, bosch 040 fuel pump, Z32 afm, Remapped ecu, Oil catch can, etc so supporting this sorta power is fine.

Thanx guys. :P

Probably still a little laggy on a RB20 better suited to a RB25. The HKS GTSS and HKS 2530 are a good match for the RB20 a cam gear or a set of cams will help to

cheers

Link to comment
Share on other sites

I get 16psi well before 6k, and isnt the GT-RS kinda liek a bolt oin 2835?!?!?! So 2835 should be as / more responsive then my TDo6 which means you may be able to make 16psi by 4,500rpm at the latest...surely????????????? I think

Link to comment
Share on other sites

on a side note, anyone have any experience with a T518Z on an RB20?

they seem to be exremely well suited to the SR and one particular example in latest ZOOM mag is making close to 260rwkw with 1.4 Bar boost with great response.. other mods too obviously but still, this turbo seems to be a good deal for the SR20... maybe get similar results with a little more lag in the RB20...

I'm not 100% sure but I seem to recal them being 440hp??

Edited by GTST
Link to comment
Share on other sites

This is the interesting thing...why more lag. Was comparing my RB20 plot agaisnt as SR20 with the same turbo, makign the same power down to abotu 2rwkws difference. His engine had cams and mine std, and they were eseentially the same, actually i recall the RB20 had it by a bees d1ck :D

The T518Z woudl be interesting on the RB20, though i believe it is only T25 flanged, not T3...so bugger.

Link to comment
Share on other sites

2530/gtss have been recommended highly for the rb20. Naturally, the rb20 has less spooling power than the rb25, so that's why people use these smaller turbos.

Based on the results obtained by other forum members, a 2530 on the rb20 wouldn't make much more than 220 rwkw as mentioned above, but it will be almost as responsive as the stock turbo. Although it will be about 10 rwkw less than you have now, it will actually feel a lot quicker, because you have more average power. That is, compared to your current setup with nothing nothing nothing, BOOM big power.

If the t518 is good for 440bhp, then perhaps it is quite comparable to a GCG highflow of the rb25 turbo? the gcg highflow is apparently good up to 450bhp with the supporting mods.

Link to comment
Share on other sites

OK I translated the HKS site

( http://www.hks-power.co.jp/products/turbo/...rs/ac_gtrs.html )

on altavista bablefish.

( http://babelfish.altavista.com/ )

And I managed to get these specs for gtrs.

Power ------- 400 ps

Front Compressor

A/R = 0.60

Trim = 52

Entrance diameter (mm) = 51.2 mm

Major diameter (mm) =71.1 mm

Rear Turbine

A/R = 0.64

Trim = 76

Major diameter = 53.8 mm

Exit diameter = 47.0 mm

I'm dont really know much about this sort of stuff but maybe someof the turbo gurus could comment?

Going on the HKS Site this turbo is supposed to be as reponsive as a GT2530 but with the top of a GT2540.

So 240 to 250 rwks?

Is this just a marketing gimick or does this sound right?

Link to comment
Share on other sites

yeah roy your right about the T518Z its t25 or t28 not sure but they have that with sr20s and the rb20 the have td0516g and 18g with 25 in the auto barn ad and the say these are on stock manifold i thought the tdo5's with external gate?? my mate has s15 with T518Z and its flying on stock boost he has injectors maxxing out its around the 200kw mark

Link to comment
Share on other sites

go a 2530 Im happy with mine (now after all this time)

starts making boost at 2,800 now full boost(1.3 bar for me) at 3,500ish

could be a little sooner I tend to have to keep my eye's on the road when it opens up

Link to comment
Share on other sites

I actually like the GT-SS if you want mid range punch , its basically a 2530 with a 60 trim compressor instead of a 63 . I don't think I've seen a 2530 with the comp cover off and don't remember its cartridge number so can't confirm if its a late design wheel . I'll have a look at the 60T comp map to get some idea of its airflow / power potential .

I can see the 4 to 6 cyl 2000cc comparison creeping in again , don't forget the SR20's pots are ~ 1.5 x RB20's pots and the exhaust slug or putt to the turbine is significantly different - enough to allow the 4 cyl a .86 a/r turbine housing where the 6 seems to be quite laggy with it and probably needs the .64 a/r housing .

My 2 cents spent cheers A .

Link to comment
Share on other sites

From turbobygarrett/products/turbochargers/small frame the maps look like this though the turbine housing used here was Garretts T28 flanged .64 housing . It'd be nice to think that the T3 flanged HKS equivalent would be better inside . I'm not sure which comp cover HKS use on the SS but it may be the slotted or port shrouded type used on the 2530KAI if its the 6 cylinder model specific version .

Note how HKS have changed their thinking with older turbos like the 2510 and 2540 and the result has been the GT-SS (more open bladed turbine and smaller trim compressor) and GT-RS (smaller 71 vs 76 mm compressor of a more modern design) . The gain is response and far better compressor to turbine load balance .

HKS turbos can be expensive but they bolt on where Garretts often don't and cost lots to adapt . You have to do the sums to know the final figure .

Cheers A .

post-9594-1140555297.gif

post-9594-1140555320.gif

Link to comment
Share on other sites

The T518z is the T25 flanged TD05H-18G. It has custom housings on both sides to make it a true bolt on for an SR20. This includes bolting onto the stock dump pipe, stock hot pipe and stock air intake.

My pal with the T518Z on his S14 is now making 275rwkw, thats pretty phat!!!

Btw Roy with cams I found my SR20 lost fair chunk of low down torque, I really dont like it. Its like I'd get blown away by even a 1.6L pulsar unless I have it above 4000rpm.. just a note...

Also I think the GT-SS is a waste of time being a 60 trim compressor. Thats no bigger than the standard turbos on the S14/S15! (Turbine is better though).

Link to comment
Share on other sites

60mm compressors move a fair bit of air if you spin them fast enough , I don't call ~330 wheel horse power too shabby . S14/15 BB GT28's are limited by a Nissan specific GT28 compressor and garden variety (for a GT28) turbine /housing/dump and exhaust manifold . If you used the GTiR manifold and a GT28RS (GT2860RS) the difference is huge . Not all 60mm compressors are equal and uncorking the exhaust side lets the engine see a whole new world .

Cheers A .

Link to comment
Share on other sites

i would well and truly choose the gtrs over a gt30 anyday.. especialy for its direct bolt on feature were as gt30 top mount mani, gate, blah blah blah you know the usual big snail mod

the gtrs is well and truly capable of making 250rwkw on a rb20 with the supporting mods ive found the garrett equivilant and a friend of mine is tryin that soon on his rb20 so will be awesome to see

Link to comment
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
 Share




  • Similar Content

  • Latest Posts

    • Vanos solenoid problems and basically all sensors die an early death 
    • Yep, back in the day when you could pick up a Stagea RB25 NEO for $1,500 it was worth it. These days... just chuck your V8 or B58 in.
    • from my limited BMW experience: - they burn oil WTF (B48 FTW 170kW engine) - dump oil every 5,000km and you'll be ok.. until it drops a bearing and rebuild time. replace engine with B58
    • I would avoid the AWD motor in a RWD using a modified RWD sump and pickup. The way the pick up is positioned, you'll have oil pick up issues on hard acceleration on a track around bends. Even with a baffled, gated sump. I suppose if you don't race on a track and it's used for straight line activities or street use you might be ok.
    • They absolutely are, but the thing is, if you're only exposed to these circuits for a while, what I normally think is good driving suddenly isn't so much. I was a pussy at the Nurburgring (GP) entering corners at 180kph - the difference in the balance of the car suddenly becomes so much more pronounced and I'm still a bit regarded at left-foot braking - something I now practice on my commute. So the (dream) plan with the E90 is to make it a 325i Cup car. Whether I get there or not is another matter. In my mind the simplicity of having the NA variant and cost made it a bit more appealing. Plus, like mentioned above, I'm actually too much of a pussy for big power. Of course I f**ked up by not researching enough on the N53 vs N52, the latter being more robust without the DI system.  Suspension-wise on the BMW, and I've been reading the technical requirements for the 325i cup, basically everything except struts has to be standard - bushes are free. I figure you get about 5-10mm adjustment with the rear camber bolts which should translate to 0.5- 1.5 degrees of adjustment. So with coilovers, lowered at 30/40mm I expect I can dial out some of the camber from a drop and attain -1.5 to -2. If necessary, I could get the same effect as the M3 arms with some offset bushes. There is a limitation on ARB width to qualify, although I absolutely want to get either M3 ARBs (can't say sway incase I upset GTSBoy) or the H&R ones - both of these are the cheapest options. Like mentioned, M3 arms are on the way and I should have them fitted within the next week. How are the BC Racing coilovers btw? Reviews are mixed but I think for me they would be fine; a friend of mine uses them on his R34 for track driving and has nothing bad to say. I'm looking at these or the ST coilovers (German brand, new to me) as prescriped the in Cup spec sheet. They're both similarly priced and offer camber adjustment. It's fine but it really upsets my OCD. I've got a couple of options for dialing out the rear camber and keeping my ill-fitting wheels: raise the rear a little bit, say 5mm, that should permit -2.5 camber or drop the front to restore that slight bias of more negative camber up front (not optimal with the roads here). The next alignment won't be until at least next year and I really need to rebuild the rear subframe. For now, I'm not using it at all on the streets except occasional blasts through the German countryside. I was covering about 10k kms p/year in Japan, I expect this to now be about 3-4k. You could say buy better sized wheels, and yes, I should have. But the wheels came from the Z and price of good wheels is just insane now. Again, a couple of options: get a new set (I want 17" RPF1s) or buy two used 9.5J TEs, both are about the same price excluding shipping. 
×
×
  • Create New...