Rb20det Minor Performance Upgrades (update Turbo Selection)

[sama1500]

sorry to bring up this thread again however i have recently found out about mambatek turbos, they seem to be of the same quality of kando turbos and the same price range except ball bearing and have been looking at this turbo in particular:
http://www.ebay.com.au/itm/MAMBA-GTX-Ball-Bearing-Turbocharger-GTX3063R-Nissan-Skyline-GTR-R31-RB20DET-300P-/181736850896?pt=LH_DefaultDomain_15&hash=item2a505c45d0

not knowing much about turbos myself would someone please tell me how this would work out on an rb20 lag/power wise? would be a great help if possible thanks

[Missileman]

none has tried it, man up and be the first, and then report back

[sama1500]

it is tempting and seems good value for money, i was going to get a kinugawa td05 18g 8cm before i found this
specs td05:
Compressor wheel: 50.5/68 mm

Turbine wheel: 49.2 / 56 mm

8cm housing

journal bearing

specs gtx3063r

Comp. Wheel : 47.1 mm / 63 mm/Trim 56　(11+0 GTX Billet Wheel w/ Extend Tip)

Turbine Wheel : 52 mm / 56.5 mm / Trim 84

ceramic dual ball bearing

10cm housing

[sama1500]

they do have this

http://www.ebay.com.au/itm/MAMBA-Ball-Bearing-Billet-Turbocharger-GTX2867R-Nissan-SR20DET-S13-S14-S15-A-R64-/171761474206?pt=LH_DefaultDomain_15&hash=item27fdc81a9e

which is exactly what i would like except it only comes in bolt on for the sr20 which is extremely annoying

[Missileman]

SR20 uses a different turbo to manifold flange and dump flange , so you will need an adapter and a custom dump

Edited May 17, 2015 by Missileman

[R_34]

This is the cropped GT30 turbine wheel not the real gt30 one.

It may perform anyway as the compressors is not that big.

I have the kinugawa version with much bigger turbine (garrett stage 3 wheel which is 65mm at the inducer), and a 20g compressor (52.5/68mm wheel).

With an EBC in good working order I was able to get 19 psi/1.3b at 4000rpm, without EBC I only get 14psi/0.9b at the same rpm and the engine doesn't relly wake up before 3500/3800rpm with a front facing plenum.

It was able to give 198rwkw/320 Nm at this boost through a standard S13 airbox and paper filter in it, FMIC, front facing plenum and 3 inch turboback.

This mambatek will spool fairly quicker maybe not as quick as you'd want, power wise I've no ideas but it will be able to break the 250 rwkw I guess.

In the same range of size sonic performance offers bolt-ons solutions based on the GT2860RS and GTX2860/2863/2867 but it ain't cheap.

[sama1500]

too much hassle to get an adaptor and custom dump honestly, i've seen the range sonic performance offers and its probably a bit too much for me price wise, R_34 is your rear housing a 10cm or 8cm?

[Missileman]

so wait six months, as Hypergear is investing in a 32gtst and developing turbos for the rb20...

it might not make 20psi by 3000, but will be pretty good

[sama1500]

i can deal with it being at full boost by 3500, put a boost guage in recently and turns out my rb25 turbo is hitting 12psi by about 3400 and 7 at 2800 so that was a bad call on my part, sounds interesting, need some supporting mods before i get my turbo anyway so if i havnt gotten a turbo before 6 months i'll have a look at that too, the only thing putting me off this mamba turbo is the 10cm turbine housing

[sama1500]

there is another version with a slightly smaller comp wheel, gtx3063r 47.1/63 trim 56, all other specs are the same

[Missileman]

and what does your 25 turbo do at 6000, is it still holding 12psi?

My SS2.5 hyflow makes positive boost @ 2.8K and 20psi @ 3.8 and keeps it to 7500rpm

Not sure what kilowatts it make as I tune it myself

all my passengers have a big grin @ 4000

[sama1500]

yeah it holds 12psi up to 6 although beyond that i tend not to look at the boost gauge and at the road, thats pretty good although personally i'd like positive boost at 2.5 or less

[Missileman]

brakes, anti-roll bars, nistune, injectors, Z32 AFM, and intercooler, turbo and tune should be the last thing you buy

[sama1500]

im already aware of the supporting mods i need, thanks anyway though

[Missileman]

...and if it still has the stock fuel pump, then that should be the first thing you change, the rest is in order as posted above.

Mike.

[Missileman]

blah blah blah

put in exhaust between Nistune and Injectors.

Edited May 17, 2015 by Missileman

[sama1500]

all thats left is nistune, turbo, z32 afm and injectors, have everything else, hardest part is selecting the right turbo really

[R_34]

Mine is a 10cm², and it holds boost perfectly all the way to the rev limiter à 8200rpm when I was running 19psi.

I backed off because of the EBC and the gearbox which didn't liked the "high" boost.

Positive pressure begin in the low 2K but the turbo is lazy to gain boost and doesn't hit 0.5b before 3000 rpm with the ebc and 3500 without.

[sama1500]

going by what you're saying the mamba turbo should spool faster than your kinugawa turbo with the smaller wheels and being ball bearing, if the housings are the same size it shouldnt be a problem for me then

[Missileman]

Often a tuner will supply and instal a Nistune and tune the car as a package deal, so that can be the last pieces in the sporting mads lineup.