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Help With Twin Decision

Boostage

By Boostage,
in Engines & Forced Induction

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Boostage Rookie

Boostage

Posted
Posted

Car details:

1996 S14

1jz-gte with 264 cams/springs and retainers.

I recently bought a Custom TT kit for my 1jz, that has stock skyline gt28r twins..

DSCI0294-1.jpg

DSCI0296.jpg

Now I understand that the stock RB twins have ceramic wheels and also not big enough to meet my power goals of around 525rwhp.

Here is a dyno of a very similar 1jz kit but with steel blade gt28r's..

IM00024720Medium.jpg

Thats the poweband I want but with about 50rwhp more before it starts to fall off.

that 480rwhp was made on 21psi. but I dont know the specs on those particular gt28r's so What I am trying to find out is this:

if I upgrade stock to steel wheel, what would be the turbos' safe rwhp limit?

Or should I just get new turbos? if so what do I get? gt2530? gt2871?

I am willing to give up just a little response for a bit more top end power/RPMS. but I dont want a slug under 3k.. dare I say I would like a good compromise of response and all out power similar to the MINES Skyline

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bazr33 Mentor

bazr33

Posted
Posted

Not that i know much of the turbos you have, but if you were thinking of having the ceramic changed to steel, the price to do it (from what i have heard) is bullshit.

ya might aswell find a pair of turbos that are steel wheeled to start with, as it will be more cost effective

So yeah i would be pissin those ones ya have off, and going the 2871's.

SLIPPERY Experienced

SLIPPERY

Posted
Posted

high flowing those ones will leave you around the 400rwhp mark.

The best bet would be to use some garrett GT2860r-5 or HKS 2530s which would allow you to make 500 and above.

Since the 1J is a bit more of a torquey motor, then id guess they wouldnt take as long to come on song compared to an rb26. These turbos can be made to be quite responsive quite easily anyway

1400r Veteran

1400r

Posted
Posted (edited)

bin above parts

or resell it if you really want to I guess lol

and buy this kit

http://page9.auctions.yahoo.co.jp/jp/auction/k48947625

much better for skids

Im assuming car is being built for skids?

Edited by 1400r
rb26s13 Mentor

rb26s13

Posted
Posted

i have a pair of GT2860r-5's that im looking at getting rid of very soon.. ive had them a while however they've been bolted to the project car which has had basicaly no use.. turbos have seen basicaly no use.. they are still on the car which is sitting in the back yard and hasnt moved for a couple months.. if your keen pm me

Bumblebee Experienced

Bumblebee

Posted
Posted

skylines dont run a GT28R

its just a T28 ceramic turbo.. as for hi flow options... i dunno, but i just made 287.8awkw on 15.2psi.. now i dont know if theyre stock or if theyve been hiflowed. but it seems they have a lot more puff before runnin out...

the car was meant to be completely stock.. and original GTR R32.. but these power figures r far from stock

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