s15 turbo

[.wolfwood]

hey i was just wondering if any one knows for sure if a aus spec t28 of a s15 is BB or not, ive looked at other forums and get so many mixed replies

if canyone could help me out that would be great

thanks ben

[Dorio86]

Yes, but sometimes when people rebuild then they turn into plain bearing. Dont worry too much though, the difference isn't dramatic.

[DRFT - 86]

simple as that . . .

[.wolfwood]

so tehy are, thank you for answering my question. isnt the diffrence that BB you can run more boost and spools quicker, or am i wrong?

[Dorio86]

Yes you are wrong, the turbos efficiency rate has nothing to do with bb or not, thats got to do more with the size of the turbo, what engine specs your running and how much boost your giving.

Bb spools a bit faster because theres less friction unlike plain bearing (sometimes you can hardly tell, bb turbo companies exagerate and wanabes also dont no jack)

Plain bearing are cheaper to maintain, I have been in cars with both types of turbos, when rallying or racing I can't tell the difference.

IHI mitsubishi have developt twin scroll turbines into VVt EJ20 engines just to improve drivability, however subaru will tell you they are the best turbos ever made. The same with the s15 and jap s14's, just so the car feels that bit more responsive when cruising or traveling around traffic. But theres nothing wrong with that, if you have the extra cash go for it.

Before you go buy the turbo make sure there isn't too much play with the turbine shaft, that is, if the turbine wheel moves a lot to the left or and right, it needs rebuilding.

[upgarage]

aus s15 t28 is not ball bearing
just get a rb20 turbo off a r32. not only are they ball bearing, but theyre 200 bucks and t28ish in size

dorio mentioned checking the shaft play left and right, bu also check it forwards and backwards.

find out the part number on the turbo core and that is the most accurate way to distinguish if its bb or not

[Dorio86]

According to my knowledge s15 t28 are dual ball bearing.
http://www.courtesyparts.com/Merchant2/mer...Code=SR20DET-TC (http://www.courtesyparts.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=CP&Product_Code=SR20DET-TC)

"The Silvia S15 Spec-R is the Japanese version of the U.S.'s 240SX.
This is the stock S15 Silvia Spec R T28 Dual Ball Bearing Turbo."



The ADM s14 t28 turbos were plain bearing.

[.wolfwood]

okay kool thanks for all your help, the onw i looked at is $600 and doesnt have any shaft play. i jsut wanted to make sure it was bb before i bought it.

this turbo is for my sprinter, already has a trbo on it but shit small and the manafold is brokrn so i thought i may as well go something bigger when i got new manafold.

ben

[upgarage]

Dorio86 you are wrong
the adm and jdm s15 received different turbos
aus spec = non bb, jap spec = bb

[Dorio86]

I though they were just de-tuned to pass emissions and run under the ghey 95 octane. Mmm, but I think your right, sorry, my bad.

"VCT SR20 has different inlet plenum position (similar to the CA style), the rocker has a hump on the back and on the front of the motor (head area) there's some bit sticking out. S14 SR20 came with the T28 turbo, but apparently the last batch of S14a jap spec came with T28bb. all jap spec S15 SR20 came with T28bb, apparently the aus spec S15 only came with T28 not ball bearing but bush bearing (dunno how true on this cuz it's still debated on).

and the S13 model series redtop and blacktop all came with T25g. the only difference is the colour of the rocker cover and maybe the factory tuning is different cuz there are 3 different series of computer for the S13 SR20."

"Hmmm... my Aust spec S15 came with a T28bb..."

"All s15 Spec R had t28BB turbos
Dunno about Spec S i think they are the ones with bush bearing turbo (though definately know they have less power and are all AUTO)
All S13s had t25G turbos
though i dunno what the Update model RPS13 180sx had (anyone help here?)
as for S14s they had different ones depending on what model you get.
And last but not least Good old Gti-R Has the best one of all a higher flow version of the T28bb.

Not sure just how correct my info was 90% sure but"


Taken from: http://www.boostcruising.com/forums/index....0&#entry5282820 (http://www.boostcruising.com/forums/index.php?showtopic=59166&st=1025&p=5282820&#entry5282820)

[upgarage]

your source is wrong
"All s13s had t25g turbos" - wrong, how about the ca18det?

The auspec s14/s14a/s15 all came with the same turbo, which is a plain bush bearing turbo (derived from the part numbers, calling the Nissan engineers and turbo workshops such as ATP and AVO.)

-taken from silviawa

[Dorio86]

Your right !!!! I could swear a nissan dealer told me the s15 had a ball bearing turbo, http://www.ae86drivingclub.com.au/forums/emoticons/dry.gif I will never trust a car dealer again.

[.wolfwood]

well tahts crap, i wanted to get it for my sprinter but i wanted a BB turbo, shit now im gona have to search again for ever before i end up finding a turbo, GAY SCHOOL.

anyone want to recomened me of a turbo i should get, and if you have seen one on so forums some were thats 2nd hand that would be great

[Dorio86]

sorry about that.

bb: wrx or sti turbos, rb20 or 25(awesome torque), jap spec s15 (grey imports)

the wrx will be a great match, very responsive.

[mr2drift]

s-15 works extremely well on 4a anyway its what beau had originally and that setup was insane..... is costly way though, leighton uses a skyline turbo, r32 i think and its perfect, or find a hks 2510 like mine its insane response is phenominal....

[.wolfwood]

okay now the problem is find one second hand thats not stuffed

[.wolfwood]

something i forgot to ask was does it really matter if the turbo isnt BB, if i end up getting the aus spec t28 will it be much diffrent to a jap spec BB one?

[Dorio86]

DID YOU ACTUALLY READ MY SECOND POST GEEZZZ

[.wolfwood]

yes i did read it, but what diffrence if there?

[Dorio86]

still dont understand that bb's have less friction read this
http://www.airpowersystems.com.au/ls1/turbo/turbo.htm note that its exagerated

[NickAE86]

or find a hks 2510 like mine its insane response is phenominal....[/b]

^Hell yes...im usuing a gt28rs & its poo

[.wolfwood]

poo hey,

um compared to a t28 is the hks 2010 biger or smaller, make more power or less?

thanks ben

if you havent already niticed i know stuff all about turbos.

[mattysshop]

twin scroll turbos...have a look at 15year old celica GT4 turbos..and IHI are thinking that their the ducks nuts for having them now.. phhht..

[mattysshop]

having said that..my mate has one of those super T70 $300 turbo's you buy off the net, it's in a RA23 celica with a 1JZ in it..should break into the 11's easy..proving he get traction..it's just a plain bush type..spools alright! http://www.ae86drivingclub.com.au/forums/emoticons/smile.gif

[DRFT - 86]

Originally posted by Mattysshop@Nov 28 2005, 11:31 AM
having said that..my mate has one of those super T70 $300 turbo's you buy off the net, it's in a RA23 celica with a 1JZ in it..should break into the 11's easy..proving he get traction..it's just a plain bush type..spools alright! http://www.ae86drivingclub.com.au/forums/emoticons/smile.gif
was always interested to hear about the use of the ebay specials....

[.wolfwood]

some of that ebay crap looks very um cheap

[mattysshop]

yeh i know..but 455rwhp speaks for itself.. http://www.ae86drivingclub.com.au/forums/emoticons/smile.gif

[.wolfwood]

hmm indeed it does.

GARRETT T28 Turbo from RB26dett Nissan Skyline would that be BB?

[Dorio86]

heres the answer to everything www.google.com

[Peripheral]

Google is the saviour of our souls.

[.wolfwood]

hhaha ok will reserch myself

[upgarage]

the gtr turbos have very small rear housings
find a hks 2510 and u wont go wrong

[.wolfwood]

okay wil lsee if i cant find one of them.

[upgarage]

my mate has one on his 4agte and it pumps out 250rwhp with no lag at all
probably the ultimate compromise between power and response
good drift turbo

[.wolfwood]

sounds good, what sorta revs it come in at and does it carry through out the hole rev range?

would a t28 be a bit big for drift?

[upgarage]

yes, doesnt run out of puff and no lag what so ever
t28's are similar size to the hks 2510

[.wolfwood]

sounds good, might have to see how much one of these are gona set me back

[SANMARU ZED]

I dont want to start any arguments here boys but here are the facts

all black top sr20's / S15 sr's have BB gt 28's
and all silvertop rb20's have PB GT 25's

Only differance between jap and aus spec S15's are computer tuning

[.wolfwood]

ah his is always what happens, one person says they arnt BB and others say they are, i want cold hard evidence.

wtf is silvertop rb20's have PB GT 25's you mean jsut your normal s13?

abd what is gt?

[seek]

Originally posted by SANMARU ZED@Nov 28 2005, 05:41 PM
I dont want to start any arguments here boys but here are the facts

all black top sr20's / S15 sr's have BB gt 28's
and all silvertop rb20's have PB GT 25's

Only differance between jap and aus spec S15's are computer tuning
Not true. The s13 blacktops did not come with the t28, they were all t25g

[.wolfwood]

what would make more poeer the t28 or the hks2510?

[SANMARU ZED]

Originally posted by THE 86+Nov 28 2005, 06:02 PM-->
<!--QuoteBegin-SANMARU ZED@Nov 28 2005, 05:41 PM
I dont want to start any arguments here boys but here are the facts

all black top sr20's / S15 sr's have BB gt 28's
and all silvertop rb20's have PB GT 25's

Only differance between jap and aus spec S15's are computer tuning
Not true. The s13 blacktops did not come with the t28, they were all t25g [/b]
Ahhh black top s13.........? wtf http://www.ae86drivingclub.com.au/forums/emoticons/blink.gif
what did a red top sr20 come in then ..?

black tops came out since the s14 with a plain bearing gt28
when the s15 was released it gained a ball bearing gt28 and vvti

in future please do research b4 making silly statements

[SANMARU ZED]

Originally posted by .wolfwood@Nov 28 2005, 05:59 PM
ah his is always what happens, one person says they arnt BB and others say they are, i want cold hard evidence.

wtf is silvertop rb20's have PB GT 25's you mean jsut your normal s13?

abd what is gt?
yes s14 black top sr 20's came with plain bearing turbos while the s15 gained ball bearing

and a silvertop rb20 came out of a R32 gts t skyline and came with a plain bearing gt25

gt is garret turbo

[matt99]

to my understanding.
CA18det (T25)
s13 Redtop SR20det (T25g)
s13 Blacktop SR20det (T25g)
s14 Blacktop SR20det (T28 Bush bearing And VVTor know as VCT)
s15 Blacktop SR20det (T28 Bush bearing And VVTor know as VCT)

To my understanding JDM s15's only came out with the T28 ball bearing for a period of 12months. I have never seen a T28BB on a Aus spec s15 before, even while taking the turbo off a AU s15. I think most the confusion comes from people thinking all S15's come with a ball bearing turbo.


HKS gt2510 comparied to a T28bb........ Neally the same turbo but the 2510can handle up to 360hp, both are BB and the 2510 has a larger : either rear wheel or front wheel.... Iv got a 2510 and they Rock.... pritty much instant Boost and it pulles untill redline ( well thats if you can keep the fuel up to it) Hope this helps u out..............

[.wolfwood]

so the 2510 will make more power on a 4agze?

[upgarage]

Originally posted by SANMARU ZED+Nov 28 2005, 05:07 PM-->
<!--QuoteBegin-.wolfwood@Nov 28 2005, 05:59 PM
ah his is always what happens, one person says they arnt BB and others say they are, i want cold hard evidence.

wtf is silvertop rb20's have PB GT 25's you mean jsut your normal s13?

abd what is gt?
yes s14 black top sr 20's came with plain bearing turbos while the s15 gained ball bearing

and a silvertop rb20 came out of a R32 gts t skyline and came with a plain bearing gt25

gt is garret turbo [/b]
dude your wrong
the laurel and cefiro came out with plain bearing t28ish sized turbos

please stop quoting what u read on some website and speak on a first hand basis

[.wolfwood]

so what would make more power the T28 or the hks 2510???

[SANMARU ZED]

Originally posted by upgarage+Nov 28 2005, 08:31 PM-->

Originally posted by SANMARU ZED@Nov 28 2005, 05:07 PM
<!--QuoteBegin-.wolfwood@Nov 28 2005, 05:59 PM
ah his is always what happens, one person says they arnt BB and others say they are, i want cold hard evidence.

wtf is silvertop rb20's have PB GT 25's you mean jsut your normal s13?

abd what is gt?
yes s14 black top sr 20's came with plain bearing turbos while the s15 gained ball bearing

and a silvertop rb20 came out of a R32 gts t skyline and came with a plain bearing gt25

gt is garret turbo
dude your wrong
the laurel and cefiro came out with plain bearing t28ish sized turbos

please stop quoting what u read on some website and speak on a first hand basis [/b]
Wtf i have been in the automotive industry since i was 13 i dont care what the cerifo or laurel had on them we are not talking about them
maybe it is you who should be quoting from first hand exsperiance my friend

[Dorio86]

wolfwood, best way to find the answers your looking for is to join a nissan or performance forum. Remenber, google!!!!!!!

[.wolfwood]

yes but goole doesnt tell you what turbo would be better suited for what car and what would make the most power.

also is a 2530 to big for a sprinter, i think it would be

[Dorio86]

thats why I told you to join nissan or a performance forum by using google. Everyone here that has a turbo set up has alridy told what they have.

No, the 2530 is not too big, it just has more top end(If your refering to HKS)

[Peripheral]

Damn turbo's

[SANMARU ZED]

Originally posted by .wolfwood@Nov 29 2005, 10:18 AM
yes but goole doesnt tell you what turbo would be better suited for what car and what would make the most power.

also is a 2530 to big for a sprinter, i think it would be
ON A 4AGE A HKS 2530 WOULD HIT BOOST ANYWHERE BETWEEN 3500 AND 4200 DEPENDING ON YOUR MANIFOLD SETUP AND TUNING AND OF COURSE TURBO CONDITION

[Dorio86]

BUT YOU CAN IMPROVE THAT BY INSTALLING A WASTEGATE CONTROLER WHERE THE WASTEGATE STAYS SHUT UNTIL YOU RECEIVE POSITIVE BOOST PRESSURE.
eBOOST 2 AND OTHER BRANDS.
ANY OWE, WHERE YOU REFERING TO GARRETT OR HKS? NOT TO GET CONFUSED.

[upgarage]

this thread is about twice as long as it should be because of idiots preaching bullshit

firstly all r32's came with bb t28ish sized turbo
its not actually a t25 or a t28 so people just call them rb20 turbos

here is the info taken from silviawa re: bb or non bb

Basically ALL t28's for ADM s14/15 use the following part no's:

Jap PS13 14411-50F00
AU/NZ S14 (pre-facelift) 14411-75F00
AU/NZ S14 (facelift) 14411-75F00
Jap S14 (pre-facelift) 14411-69F00
Jap S14 (facelift) 14411-82F01
Jap S14 (Autech/270R) 14411-RP801 (Same as S15 early MT turbo)
Jap/ NZ S15 (early*) 14411-91F00 Manual model only
Jap/ NZ S15 (early*) 14411-69F00 Automatic models

Jap/ NZ/ AU S15 late* 14411-75F00 Same as NZ S14 and same for both Auto and manual

Also here is a letter from Nissan, Cust relations:

With reference to your inquiry about turbos, we advise the following: S14 & S15 use the same turbo, which is a Garret T04B, with "plain bush" type bearing. Roller bearing turbos are only on Japanese domestic model. I trust this satisfies your inquiry.

Regards
Val Davis (Mrs.)
Mgr - Customer Relations
Nissan Australia
ph 03 9797 4111
fax 03 9797 4408

Summary:

The auspec s14/s14a/s15 all came with the same turbo, which is a plain bush bearing turbo (derived from the part numbers, calling the Nissan engineers and turbo workshops such as ATP and AVO.) There were a handfull of t28BB that did infact come in the s14a and s15, but they were lucky pics.

Also the turbo workshops i spoke to mentioned that no t28 they have pulled from an ADM s14/s14a/s15 has been BB.

So auspec S14/15 = None BB T28. JDM = of course.

Here is a list of Nissan dealers to backup the part number for t28.

Nissan
Dandenong VIC 3175
ph: (03) 9797 4111 Motor Replacement Parts

260- 260 Frankston Rd Dandenong VIC 3175
ph: (03) 9797 4111 Motor Replacement Parts

544 Elizabeth St Melbourne VIC 3000
ph: (03) 9347 4533 Motor Engineers & Repairers

2- 12 Clyde Rd Berwick VIC 3806
ph: (03) 9796 1777 Motor Engineers & Repairers

429- 443 Grimshaw St Bundoora VIC 3083
ph: (03) 9467 5888 Motor Engineers & Repairers

138 Whitehorse Rd Blackburn VIC 3130
ph: (03) 9894 2244 Motor Engineers & Repairers

350 Springvale Rd Glen Waverley VIC 3150
ph: (03) 9560 4711 Motor Engineers & Repairers

ATP:1198 Dandenong Rd Murrumbeena VIC 3163
ph: (03) 9569 4764 Turbochargers

[upgarage]

see here, more info about r32 turbo

http://www.skylinesaustralia.com/forums/in...topic=86968&hl= (http://www.skylinesaustralia.com/forums/index.php?showtopic=86968&hl=)

[.wolfwood]

well thats all i was really after this hole time, thanks upgarage.

and i was refering to hks

[.wolfwood]

i also have a motec so maybe with a hks 2520 i will be able tp get it spooling a bit quicker if i get the rite person to tune it

[NickAE86]

a 2510 would be more responsive than a bb t28 but with the right computer/tuning & intercooler setup both would similar (imho)

mine (gt28rs) spools quickly but doesnt come on hard until 3500ish rpm. Im still running standard ecu & injectors & only pushing 11psi...once i fix this i think lag will be negligible

the gt28 is also 1300 cheaper than the 2510 brand new

[.wolfwood]

ahh fark im so confuesed, i dont know what to do anymore. i wasnt a second hand turbo as i cant afford a new one. i just want to make a decent amout of power yet not have heeps of lag so that i cant take it onto the drift track

[upgarage]

go the 2510 250rwhp is plenty, no lag what so ever

[.wolfwood]

what about one on those disk potatos?

the only thing y i cant really get a 2510 is cuz there so dma expensive

[.wolfwood]

ended up getting

GT28rs

thanks for al ya help

[DRFT - 86]

cool... let us know how it goes dude...

[Dorio86]

Your going to love that turbo. there are a lot of other ways to make the turbo spool quicker,cams,length of the manifold, maybe you should consider a V mount. An old mate of mine had it on his conquest (starion) that turbo is really efficient at 25 psi.

[.wolfwood]

holy shit 25psi nice, now i gta wait 2 - 3 weeks for turbo to get delivered and in the waiting time will get my manafold and shit made up, gona get BOV for this turbo, i dont what to reck it.

[.wolfwood]

hmm i jsut realised that on the turbo that i got deliverd it says A/R .60, does this mean that its not a gt28rs as im sure the A/R s .62?

does that mean i got sent the wrong turbo????