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Anyone got an aftermarket turbo on an rb20?

makaveli

By makaveli,
in Engines & Forced Induction

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Roy Grand Master

Roy

Posted
Posted
I have a RB20 with internal gate TO4E and its obviously a little non street friendly.

I want to have 200-220rwkw with a max of 1.0-1.2BAR but with decent average power. My TO4E would get close to 200rwkw @ 1.0-1.2BAR but it would be asleep untill over 5,000rpm.

That doesnt sound right, i think there is another problem somewhere, if its a T04E it should be making more power then that, that is provided you have an intercooler and and exhaust on the car??? I think Clint 32 had a similar setup on his RB20 and was making 240rwkws (approx) with the usual support systems.

DCIEVE Mentor

DCIEVE

Posted
Posted

i made 190rwkw on stock fuel system and a t3/rb20 based highflow.

have a td06-19c now, have a dyno from old owner and 1bar doesnt arrive untill almost 5000rpm.... but it was completely shagged when i got it so that could be the reason for the lag. has a much larger garret comp wheel in it now so will be interesting what it makes when it gets on the dyno in a few weeks.

other mods now include ecu, 019 pump, gtr injectors, fmic etc, but std inlet and exh manifolds. this is the redtop so hopefully ill be able to get in the region of 230-250rwkw's running well under 1.4bar

may have to throw in some stronger bosch coils as well with the std ones not handling the 190rwkw's too well

what size cooler piping are people using at these power levels?

CGB_R32 Proficient

CGB_R32

Posted
Posted

thanks for the info rbs13... this stuff has got me confused as a mofo can someone narrmow it down for me...ideal turbo to use on an RB20 that will get my 250 kw but i dont wana have to wait 5k+ revs for boost... is there anything out there?

FATGTS-R Experienced

FATGTS-R

Posted
Posted

ROY wrote:

That doesnt sound right, i think there is another problem somewhere, if its a T04E it should be making more power then that, that is provided you have an intercooler and and exhaust on the car??? I think Clint 32 had a similar setup on his RB20 and was making 240rwkws (approx) with the usual support systems."

Sorry, I should clarify. The turbo is only on 0.6BAR at the moment and those figures are just my estimation of what it will produce. And yes I have all the usual support systems. Also dont forget mine is an internal wastegate TO4E which would I assume make less power than an external gated model.

Roy Grand Master

Roy

Posted
Posted
roy have you got a power figure yet? wanna see how she goes

The car has sat in the susp place all week :P , front springs failed for some reason, so waiting for a replacement set, as soon as new springs go in car is getting driven accross town for the cam gears, cams, valve springs and tune. So maybe mid to end next week, then a visit to Calder for a laugh :cheers:

meggala Grand Master

meggala

Posted
Posted

my sr made 203 rwkw full boost 3200 rpm boost 1.2 bar

cams custom manifold some more bosot and tunig 230-250 shoud be very doable for me

thats why I went that route rather than rb 20

2530 should be very good also some of the hiflows do ok but dont spool early enough. for what you wantalso boostd's vg 30/25 hybrid turbo's work well on the rb 20 but not up to the 230 rwkw level. remeber you fuel system will run out well b4 230 rwk probalby around 200 rwkw

cheers

megggala

Gts-t Grand Master

Gts-t

Posted
Posted

Meggalla,

1.2 bar for 203rwkw sounds a little dissapointing to me. When bbenny makes about that with 12psi and a stock computer. id say blow the SR. go the RB20 with the hks2530 with a proven 230rwkw available on stock internals and stock ex manifold.

just my 2c worth i know, but talking smak about rb20's being worse than Sr's well when will you learn.

Mic

meggala Grand Master

meggala

Posted
Posted

well 26gts most rb20 on this dyno when they reach 195 200 rwkw are way out of fuel to give you an idea. some dyno's read high some read low the one I use reads low.

this is no pissing contest I was stating the results I made. the t518z 10cm is rated @ 420 hp. is plain bearing and does not use water lines there is no comparable turbo from hks the comparison is 2540 and 2835 . these turbos support a 180sx running deep into the 11's on a built motor no gas the development of my car has only just started the a/f's are way rich on this tune.

meggala

Chris32 Veteran

Chris32

Posted
Posted

Please no more SR v RB talk, it makes my head hurt ;)

From what I see Meggalla's results were posted for comparison, rather than to say one is better than the other

But either way keep it up, its fun to read ;)

Gts-t Grand Master

Gts-t

Posted
Posted

Meggalla,

no worries and good luck with your car development. that info was good. just thought the figure was a little low for so much boost and a turbo rated so highly. i know dynos read differently we have one in our workshop that is not dyno dynamics. i understand about the rich fuel mixtures but what was limiting more power. fuel system??

also woulld this turbo be expected to make more power on an internally standard(can include cams) rb or sr? would it not be the rb with its higher rpm capability? dont worry if theres little in it and not worth mentioning. i respect the work you are doing but just dont understand why. apart from handling/weight issues i guess

stay true(rb20),

Mic

meggala Grand Master

meggala

Posted
Posted

the rb has its place and like chris said I really dont want this to be an rb v sr thread.

I went for the sr casue of the torque that the sr has down lowa nd the off boost responsiveness to me and mind you I have had several rb 20's I find the development curve of the rb 20 is dated there is no ongoing development in japan. where as the sr is going great guns here in japan and also the us plus you need to only by 4 of every thing not 6, injectors are off the shelf etc.

I looked seriously at building a tough rb 20 I even have one sitting around and decided against it due to cost. not much cheaper than doing a full build on an rb 25 or 26. plus the lag etc up to 200 rwkw I think there isnt much better thanthe rb 20 . my power goal is 240-250 rwkw with this turbo I should get there.

one thing I have found the sr' 20's handle sustained high boost better than rb 20's that could be because the rb's are older not sure

as for this turbo it was designed for the sr not the rb 20 I just threw my 2 cents worth. on the sr they quote 270 rwkw probably with cams and custom manifold. jms claimed 300rwkw with the smaller version on their black afrkkana 180.

cheers

meggala

bbenny Mentor

bbenny

Posted
Posted

well i have a 2530 on my RB20 and im making 290rwhp at 0.9-1bar the engine cuts if i run anymore boost i think its maxing the AFM. (completely stock computer too) im throwing in some GTR cams and adj cam gears with a re-chip for the ECU. i hope to make 330rwhp, any more and i will be very happy. i dont want to run anything higher than 1.2bar to make it. this is my everyday driver, so it has to be reliable. the response of the 2530 is great. and mid range and top end seem to be awesome, i dont think it will run out of puff at under 1.2bar.

ill post the results when its done.

Chris32 Veteran

Chris32

Posted
Posted
so as i take it the 2530 is a good turbo for 350whp?

or should i go for a slightly larger turbo?

I'd maybe look at a 2535 or even 2835ProS, both should be efficient at around 250rwkw

Might be a bit too big of a ask for a 2530, but I guess until someone tries it, we wont know :(

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