Rebuilding R34 Gtr Turbos With Steel Wheels

[No.96]

G'Day,

I'm thinking of rebulding my r34 gtr turbos with steel wheels the local guy quoted me $1000.00 buck each then suggested I buy new ones.

Whats the go?

Cheers

[GT-RZ]

that's pretty much what i got told too. to change the exhaust you gotta change the whole core which is pretty much the most expensive part of a turbo... so you may as well buy a new turbo.

[Moodles2]

A pair of new garrett turbos looking at $2400 for a new pair

[hypergear]

For turbine wheels update We can change that to GT2860 steel wheels with turbine housing re-profile and wastegate porting for $700 per turbo.

[GT-RZ]

For turbine wheels update We can change that to GT2860 steel wheels with turbine housing re-profile and wastegate porting for $700 per turbos.

turbo's or turbo? you do a pair for that price or each?

[full_stick]

Moodles $2400 where abouts did you get this price???

[hypergear]

turbo's or turbo? you do a pair for that price or each?

sorry that was for one single turbo.

[R32 Driver]

For turbine wheels update We can change that to GT2860 steel wheels with turbine housing re-profile and wastegate porting for $700 per turbo.

are these the same as the -5 turbos?

[R32 Driver]

BUMP

Stao?

[hypergear]

Idential specification. In sleeve bearing.

[bradsm87]

Idential specification. In sleeve bearing.

Just to avoid confusion for others, putting ideal spec wheels in the stock housings won't make it the same as -5 turbos because the -5 turbos use a 0.6 compressor housing and 0.64 turbine housing.

[kwickr33]

Just to avoid confusion for others, putting ideal spec wheels in the stock housings won't make it the same as -5 turbos because the -5 turbos use a 0.6 compressor housing and 0.64 turbine housing.

So even more lag

[bradsm87]

So even more lag

I'm still not 100% sure what stock A/R turbine housings are on the stock turbos but most ppl say they're .48 or something. The stock compressor housings are .42. The 707160-9 wheels would prob work better in the factory machined housings.

[R32 Driver]

could the stock housings be machined out to be same as the -5s then?

[bradsm87]

could the stock housings be machined out to be same as the -5s then?

Obviously it can be machined to fit the wheel but U can't change the A/R ratio of the housing with machining.

[BoostedBarge]

A friend of mine did this a few years ago. He claims it has less lag than a set of -7s, but that was several years ago, so I can't really give you any more details than that. A turbo shop in Townsville (John Patrick) did the job for him.

[hypergear]

Well. as soon as steel wheels are in. noticeably more lag. Drove N1 and Normal R32, defiantly be able to tell which one's what. Bigger turbine housing will help making more power with more lag, its only a 1.3L 3cyc engine per turbo. I think machine -5 to stock housing would be a less laggy option for up to 350rwkws (I've seen 345rwkws).

[R32 Driver]

Do you have the dyno graph for the 345rwkw run?

Thanks

[R32 Driver]

Just had a look at the stockies

.42 front and .48 rear

does this mean it wont flow as much as a -5s (.64 a/r) after hi-flowing?

[R31Nismoid]

So even more lag

So put correctly sized -9's on there for 330-340rwkw if that is what you want.

Just had a look at the stockies

.42 front and .48 rear

does this mean it wont flow as much as a -5s (.64 a/r) after hi-flowing?

No where NEAR what "true" ball bearing -5s will make.

You are basically putting a turbo designed to be in a certain way, into a set of restrictive housings.

You run into potential issues like:

will not make power easily, require fair amounts of boost for the power, create lots of backpressure and potentially higher intake temps for the equivalent power level.

Cutting short by going a sleeve bearing rebuild in restrictive housings

vs

Ball bearing turbo, correctly designed housing/wheel combo

It's a GTR - if your too cheap to afford turbo's to do it justice, begs the question IMO.

With the brand new price of Genuine Garretts these days, rebuilding stock GTR turbos IMO is a thing of the past