Diy High Flowed Turbo?

[The Gun]

Hi guys sorry if this is a stupid question..... iv search and cant find anything on this topic.

Just wondering whats actually involved in high flowing a turbo? and if you can buy the parts to high flow a rb25 s1 turbo????

im a boiler maker and pretty handy with tools and machining, just wondering if i can do this myself???

any info would be greatly appreciate.

cheers kel.

[paulr33]

new compressor wheel

new exhaust wheel

bore out the exhaust housing snot

near bearing chra kit

balance and clean

it spins at 100,000+ rpm so i dont think its something you can do at home

balancing is crucial

[Hanaldo]

Probably best to PM Stao (username: hypergear), he would be able to tell you what is involved and what you need.

Edited May 28, 2010 by Hanaldo

[hypergear]

naa its not some thing you can do at home. involves many procedures and man hours. engineering must be made perfect for it to work.

[deano3350]

How much does a High Flowing cost? What PSI would a high flowed be safely capable of?

[Guilt-Toy]

back in the old days, I purchased a T4 front wheel and housing off a mate and stuck it onto my standard FJ20 turbo without balancing or anything and it worked good... very good..

Sold the car and 4 years later the turbocharger was still boosting and making power!

[D_Stirls]

If you have a VSR and a CNC lathe/Mill you could probably do it yourself. But that's expensive equipment of a back yard operation.

VSR

Edited May 28, 2010 by D_Stirls

[Duncan]

good question!

internals are readily vailable cheap incl vi ebay these days.

And most shops offer a balancing only service.

a diy thread would be great

[SiR_RB]

I've seen those n1 gtr turbo rebuild kits on eBay for around 300$ and comes with everthing and a user manual...would be good to see how those go hmm

[The Gun]

Awesome! thanks guys great help, iv got lathe, mills etc all that kinda gear at my workshop so it wouldn't be a backyard job.

i also make blower impellars for work that spool up to about 8000rpm so hav kinda done abit of work with balancing etc just on alot BIGGER scale!

Will def right up a DIY thread if i attempt to high flow my rb25 turbo.

cheers kel.

[89CAL]

Def take it somewhere to get it balanced..... Ive done turbos as part of my apprenticeship last week and its suprising how nice and smooth it looks rotating then the balancing machine says its a fair bit out.

as said they do spin very very fast so need to be pretty perfect

[James_03]

I put a n1 kit through my own gtr turbo's, haven't had any issues at all. The shaft's come pre-balanced.

Different to hi-flowing obviously, which you need different equipment for. Currently rebuilding a mates td0416h turbo of his volvo 850R using a genuine mitsi kit.

[jiffo]

I put a n1 kit through my own gtr turbo's, haven't had any issues at all. The shaft's come pre-balanced.

Perhaps Stao could confirm:

According to the e-bay ad, the wheel comes pre-balanced.

But then you're coupling that to your old compressor wheel and that whole assembly was originally balanced as a unit with the old ceramic turbine.

$300 is a good deal for all those bits, but surely it still needs the new turbine/shaft assembly balanced with your old compressor wheel.

[lachlanw]

rebuilding and high flowing are waaaaaaay different . anyone with half a brain can rebuild a plain bearing turbo . i rebuilt a gtir turbo with a 360 thrust bearing and it went mint for ages at well above stock boost . the kaymak kits off ebay are pretty good

[89CAL]

oh well this is just from my experience the last week rebuilding turbos, Mind you they are larger turbos for diesel engines but anyway

shaft/rotor (exhaust wheel + shaft) assembly is cleaned then thrust washers and compressor wheel are installed to the shaft and nut torqued. Shaft is then checked for run-out and the wheel, washers and nut can be rotated/changed whatever to get the minimum run out (the aim for these turbos was 0.02" max), after that the assembly is balanced taking weight off where required (balancing machine is needed for this, very handy) then all compnents marked in there position and removed, cleaned and assembled in the turbo facing the way they were assembled to get the good test results

Basically ensures everything is as straight and balanced as possible

Im sure you could get away with throwing it all back together however, but thats how we did it to get it to near new/new condition. So maybe you get lucky and it works, or maybe it doesnt.... its really one of those your own risk things if u want to do it without the right gear

As i said but this was for a different application to skyline etc so it may be completely different to the procedures used for garett, nissan etc

[bubba]

Isn't there an old thread about DIY hiflows using various OEM parts??