Hks Gtrs Rb20det

[RedDrifter]

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.

[Munna]

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.

<{POST_SNAPBACK}>

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

[DLuded]

a few people on here have hks gt2530s and they say they are perfect for the rb20. capable of getting 220rwkw and has awesome response

[R31Nismoid]

Yeah, the GTRS IMO isnt going to give you anything better than the ITS in terms on when its making its boost.

[Roy]

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

[TTT]

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 February 21, 2006 by GTST

[Roy]

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

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

[Roy]

Can anyone conform that the T518 is essentially a T25 variant of the TD05-18G, similarily the T618 a T25 variant of the TD06-18G????

[MANWHORE]

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.

[R31Nismoid]

The baby GT-SS i reckon would be too small.

It'd be almost a stock R32 turbo just with a steel wheel

The 2530/2535 are just that little bit bigger and it makes a difference

[RedDrifter]

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?

[gt-t_r34]

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

[1400r]

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

[Wazz]

if it were my i'd be more inclinded to go for a gtrs.. seeing as they spool up pritty quick on rb25's and make very decent power.. how ever rb20.. sure it'll be a bit laggier.. i'd be expecting full boost by 4-4500

[discopotato03]

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 .

[discopotato03]

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 .

[Busky2k]

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).

[discopotato03]

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 .

[kwazza11]

so t518z aside, what it seems reddrifter is looking for is a t3 turbo that will make 250rwkws with maximum response. by the looks of the specs on the turbo it would be better than your average gt30r right?

[Wazz]

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