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R32 Hi Flo Or R33 Turbo Upgrade

shinobichart

By shinobichart,
in Western Australia

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4core Collaborator

4core

Posted
Posted

Fitting the std 33 turbo will be cheaper, high flowing your 20 turbo will cost lots, i called turbo tech a while back when i screwed my turbo and they wanted a kidney.... at least....

As far as performance, most people get at least 250 hp at the rears on a std 33 turbo as long as you have some for of fuel controlling device ie SAFC or something... as for high flowed 20 you would probably have to dig about for the results.

Reliability, the 33 turbo is still standard and can (im not saying they all do) shart a rear turbine wheel off... The high flow would be steel wheels and capable of longer life and higher boost. std 33 turbos dont really like 15 pounds of boobs. I do.

Ive personally gone from a std 20 turbo, to a std 33 turbo and now a high flowed 33 turbo, the high flow 33 turbo is un-goddam-believeable, the power up the top end is awesome, but at the same time ,smooth.

At a guess i'd say the high flowed 20 would be better for midrange?

Hope this helps.

4core Collaborator

4core

Posted
Posted

Good luck with it all.

Be prepared to have a few bolts snap, or gasket replacement, or, and this is my personal favourite, "you have snapped manifold bolts, 4 to be precise".... or generally some form of pain in the ass. 32's are known for the "EXTRA WORK NEEDED" line from your mechanic.... *looks at my wallet* >_<

Still there is nothing quite like it when all of a sudden at 3500 rpm it pushes you back into the seat.

ENJOY!

bubba Grand Master

bubba

Posted
Posted

33 turbo for cheap horsepower (get a series 1 item, mine has been going hard on my RB20 and now RB30). ~250rwhp out of an untuned RB20, just make sure you have a new fuel pump as the old stocker probably won't keep up.

VG30 turbo is the same size as an RB25 Neo turbo.

I have a neo hiflow on my Stag, it's stupidly large, takes ages to spool but makes 320awhp @ 12psi.

bubba Grand Master

bubba

Posted
Posted

Nissan went with the nylon wheel to get it to spool faster. I really don't think they had people running them at 12-14psi in mind.

Ask around and see how many people have blown series2 turbo's when winding a bit of boost into them.. my series1 turbo has been running 12psi on my RB20 for over a year and now on my RB30 for 1.5years, still going strong.

Pattygtst Veteran

Pattygtst

Posted
Posted

I have seen countless topics on max boost for the rb25 turbo, to be honest i havent notcied any larger number in s2 failures then s1 but that doesnt mean your not wrong. I have seen lots of results comparing 10psi to 14psi and the max power figure didnt change, however the midrange was improved on the higher psi runs. So then in theory if the S2 turbo spools up quicker as you say, then that would be an improvement in the midrange without needing to up the boost anyways. But thats just my opinion at the end of the day i cant say for sure but thats just what i reckon. Sauwa wouldnt be the same if i didnt get to disagree with you Bubba. :(

bubba Grand Master

bubba

Posted
Posted

HOW DARE YOU DISAGREE WITH ME?! :(

Nah, a couple of members had their s2 turbos shit themselves not longer after they got the cars and wound some boost in.

The main thing that goes in RB20/25 turbos is the exhaust turbine (due to it being ceramic and seeing excessive heat when leant on). I have seen failures of the compressor wheel in s2 turbos but not in s1 (probably due to the fact that it is a steel wheel).

Lastly, if mine can survive the hammering it took on my RB20 AND survive the hammering on the RB30 (where it is actually a restriction, I'm sure the thing must glow when I spend much time around 6000rpm!) it must be a good thing :D

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