Silvia Club of NSW

Went shopping around for turbos again today.

What should i get? Remember, this turbo is for a SR20DET 180sx with aimed power output of 230-250 rwkw. I have everything else needed (injectors, apexi fc, fuel pump etc.) Since the car is street drivin, i want boost to come on early hence i do not want any lag! What is best for me!?

Please help this is the last time. This poll will help me make up my mind! I need to buy a turbo next week!

HKS GT2530

HKS GT-RS

Trust / GReddy T518

cheers,

Mark

Tough choice. They are all awesome turbos.. You have more chance of picking up a 2530 or 2540 second hand if that was your plan..

T518Z would be easier to rebuild due to being plain bearing.

I'm not sure if you can get 2530 or 40 new anymore

If I was in your situation, it would probably come down to which one was available cheapest, as they are all great

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Disclaimer: I actually DO know everything

Sil80 - SR20DET 231rwkw
Silvia Race Nugget - SR20DET 225rwkw
Stagea - DeathWagon - RB25DET 185rwkw.

My Lame Gallery: http://www.toomuchboost.com/gallery/main.php

i can get all turbos new from japan....

alot of people have said that the trust / greddy one is the best turbo for sr engines. also the rebuild is like 600 bucks because it is not a BB turbo like the HKS ones which would cost 2000 to rebuild...

I have heard great reports from both the GTRS and the T518Z.

Both are rated about 400ps
Both are bolt-on turbos
Both are $2500-2800 from Japan

The main difference is the ease of rebuild, and the water cooling of the core. You may need to idle down an engine with the T518Z a bit longer than one with the water cooled GTRS to prevent oil cooking in the turbo core

Note that I haven't been in a car with either turbo..

I think i'd probably get the T518Z... but thats just an opinion..

I will shortly be putting the ancestor of the T518Z on my sr cefiro.. td05-18G.. I think the performance should be just about identical to the T518Z

_________________
Disclaimer: I actually DO know everything

Sil80 - SR20DET 231rwkw
Silvia Race Nugget - SR20DET 225rwkw
Stagea - DeathWagon - RB25DET 185rwkw.

My Lame Gallery: http://www.toomuchboost.com/gallery/main.php

i wouldnt bother with gt2540, from pretty much everyones experience the larger exhaust housing over the gt2530 gives a fair amount of extra lag down low, without much gain up top
i remember reading about someone who had a gtr with a twin setup of these turbos and he got them to work pretty well, but found you need to be running quite a bit of boost through the gt2540 for it to shine... i believe this is because at higher boost pressures the pressure differential between the turbine and the engine can benefit from a larger exhaust housing (less backpressure, more efficient up top)

but then again, there was a dyno comparison done by 'autobarn' on ns.com and the 2540 did quite well... in fact a little too well, it had more down low then the gt2530, but i just dont see how that could be !

those turbos listed may produce around the same numbers, but im sure the difference in feel when driving should be quite evident between the BB and non BB (ie throttle responce), so in other words if you can, best thing is to get a drive in cars with each turbo instead of just relying on dyno readouts

There is no difference between the exhaust wheel and housing between the 2530 and 2540. The only difference is the comp wheel.

I have read that the T518Z has very good response. Similar to GTRS

_________________
Disclaimer: I actually DO know everything

Sil80 - SR20DET 231rwkw
Silvia Race Nugget - SR20DET 225rwkw
Stagea - DeathWagon - RB25DET 185rwkw.

My Lame Gallery: http://www.toomuchboost.com/gallery/main.php

you sure ?? hmm thats interesting..

i always thought the second set of numbers was indication of exhaust housing or wheel

damn, talk about stupid

the 2530 is a better matched turbo than the 2540 though, ie the comp wheel has an efficiency range similar to the exhaust wheel (which is good)

_________________
Disclaimer: I actually DO know everything

Sil80 - SR20DET 231rwkw
Silvia Race Nugget - SR20DET 225rwkw
Stagea - DeathWagon - RB25DET 185rwkw.

My Lame Gallery: http://www.toomuchboost.com/gallery/main.php

ive only seen good comments on the gt2530...

but quite a few people complain of the down low loss, with minimal gain up top that the gt2540 creates

so id say knock that off your list, then narrow it down from there

and then there were 3...

the HKS GT2530 is the turbo i have been leanin towards all this time, but its max output is only around 230rwkw which is why i have been looking around @ other makes. Also i have heard people say that full boost will come on around 1500-2000rpm which in my opinion would be too crazy to drive every day especially in the wet @ 220rwkw.

If i run high boost to get the GT2530 to make that output, isnt that putting more strain on the engine? Since i have stock internals, i am looking for reliablity. So, by getting a slightly bigger turbo, i will have to run less boost to produce the same amount of power, hence reducing strain on the engine? Or is this just a load of crap? Let me know i am CoNfUsEd!@!

On nissansilvia.com there is a thread about the Trust T518, and alot of people have picked this rather than the HKS GT-RS. They also stated that the Trust T518 is the "best turbo" for SR20's (which i think that statement shouldnt of been made unless it is proven) When does full boost come on with these turbos? Also i am leaning towards this turbo a bit becasue of the fact that if it needs a rebuild it will only cost $600 not $2000 like the BB ones.

I was at advan the other day, and they had one of these turbos (t518) on their red S15. The salesperson told me it was a great turbo and will get to 200rwkw + np.

As for the GT-RS, i know they are the peoples choice right now, but as they say monkey see moneky do. I am convinced the only reason people are telling me this turbo is good is becasue thats what other people have told them. Alot of people i have talked to have said it is a fairly average turbo with full boost coming on around 3000-4000rpm which would be too high for my case of a street driven car.

This is the little info i have been able to dig up myself. I would like a trubo that comes on full boost around 2500-3000rpm. That is my desired goal. Any more light can be shed on this matter it would be apreciated!

Cheers

Mark

with the right cams, i think you should be able to get around 250rwkw with a gt2530... people have gotten 220-230 without cams so i dont see it being out of reach

i actually have on of these turbos, havent put it on yet, its sitting next to me( mmm drool ), but i plan on running step 1, 264 deg. intake and exhaust cams to give me some more up top breathing, as i know down low its going to be fine with this turbo

as for them reaching full boost by 1500-2000, its wrong ! thats way too quick, even the stock turbo cant spool up that fast

as for the rebuild issue, i wouldnt let it be too much of a deciding factor in your choice, if treated well the turbo should last you a very very long time

i am leaning heavily towards the Trust Kit right now, becasue i can get it for under 2200 and becasue it is a good response turbo...

the only downfall - it is non ball bearing

does that ball bearing make that much of a difference? i do know that spool wise the bb unit will spool faster but is it noticable?

HA! I'll believe it when I see it. The 2530 is bigger than the stock T25/T28 turbos that come on S13/S14/S15.

There is no way in hell the 2530 is going to be on full boost at 1500-2000rpm when stock T28BB on S15 comes in on full boost at 3000rpm.

But please correct me if I'm wrong, I sell my GT-RS to buy a 2530 if that was the case.

I just love the whole "full boost" ideal, how much boost is full boost? I'm sure a 2530 could hit 1psi by 2000rpm and hey if your only running 1psi, then you've got your full boost by 2k

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1 man committee and still arguing...

ahhahaha, your right though. full boost of 1psi at 2000rpm

well to be clear, lets set it at 1 bar and above.