Sr20 Turbo Options

[GUN_METAL_GTR32]

try to track down an apexi ax53b70 p20 turbo charger

i had one on my s14 and it pushed out 240kws at 18psi

full boost by 4k as well

its a lil different to the usual t28 turbo swaps on sr20's

[Nissinja]

Thanks for all the info. Good read. Sounds like I may as well stick with the GT25/30 for now. Like I said I don't have any problems with it at the top end.

Are there any decent twin-turbo SR20s around? Would there be any significant gains in response/low end? Or more hassle than it's worth?

Edit: To the above, I have no preference to brand; are there any good rivals in the low end response catagory?

Edited November 13, 2010 by Nissinja

[GTScotT]

Also that GT2860RS is virtually the same as a 2530 but is compressor wheel is a slightly more modern design .

In an effort to utilize an existing thread;

I am considering running 2 x 2860RS discos on my 1JZ

I am confined to my .48 AR turbine housings however wont have much hassle going to a better compressor housing (oem housings are .30 AR for compressor).

I am thinking of using the native .60 t04 cover off the disco itself, however fear it may create an inbalance with the turbine housing. Alternatively I was thinking of machining a set of 2560 covers on (still .60 AR).

While we are on the topic of SR20 based turbos, what are some opinions on the above?

I am figuring seeing as 2530s have an outright flow of say 450rwkw in max tune, perhaps the right comp cover in my .48 housings would yield a potential within 100rwkw difference? I am assuming the compressor cover will be the deal breaker.

[STATUS]

Thanks for all the info. Good read. Sounds like I may as well stick with the GT25/30 for now. Like I said I don't have any problems with it at the top end.

Are there any decent twin-turbo SR20s around? Would there be any significant gains in response/low end? Or more hassle than it's worth?

Edit: To the above, I have no preference to brand; are there any good rivals in the low end response catagory?

zero low end and response with a twin i had a twin sr20 (tdo4's) on display in my old autobarn shop in sa for a few years

[discopotato03]

Well GT2530s have always had 0.64 A/R GT28 based turbine housings and I pretty sure a variation of a T04B sized compressor housing , the way to tell is to see of the comp housing has and adapter ring between the bearing housing and the comp housing . If the comp housing is held in by the circlip directly on the back of the comp housing its smaller .

For OE RB26 sized housings possibly 34GTR GT2556R's or 707160-9/GTSS turbos should be more responsive .

I'd have thought a single turbo conversion on a 1JZ would be simpler , much simpler that the sequential turbos I thought those engines had . Maybe look at the new BW range for something suitable .

I can't see any advantage of parallel twins on an inline four , You'd need to have one feed off cylinders 1-4 and the other off 2-3 so one would be on top of the other in a plumbing nightmare . I reckon you could do better with a custom manifold and an Evo X specific TS TIW GT3076R .

[Nissinja]

The GT25/30 has been sent away to be born again. Should be peeling tyres again later in the week

Edited November 14, 2010 by Nissinja