What Garrett Turbo Would My Hybrid Highflow Be Compared With?

[NYTSKY]

I have a highflowed RB25 comp housing with a highflowed 0P6 ex housing.

It has a new Garrett cartridge,shaft and wheels

What Garrett turbo would this compare with.

It was built by Precision Turbos and is rated at 550hp.

here is the difference between the stock ex housing and the 0P6 one.

[The Mafia]

interesting - its a 7 blader. I'm keen to see the response.

[The Mafia]

I'm well aware of this...

See my avatar..

We've had big discussions on the 7 bladers before.

[NYTSKY]

Would it be in the GT30 family?

[R31Nismoid]

If they claim its a genuine 550hp

it'll be interesting to see if it gets on the surge train like a few other 550hp hi-flows have before (GCG and others)

Being the wheels are just too big for the rear they become unhappy.

[NYTSKY]

Im planning to run 1bar with this turbo would i feel the effects of surge at this boost level?

If so how do i overcome it?

[Risking]

mongrel turbos suffer surge and alot of the early GCG high flows do.

Do you know the actual wheels sizes?? with thme it can easily be matched up with the garrett items

[R31Nismoid]

You'll notice the surge regardless of what boost as it will be most prominent in transient response in the lower RPM range where peak boost isnt a factor.

Thats not to say it will of course.

Stick up the wheel specs like Risking said and we can maybe look from there.

Obviously its a T04S wheel by the blades, just what size is the question

Also what size the rear is aswell

ps. i see adrian posting, he knows the most

[NYTSKY]

mongrel turbos suffer surge and alot of the early GCG high flows do.

Do you know the actual wheels sizes?? with thme it can easily be matched up with the garrett items

I dont have any specs on the wheels Brad.

Im kicking myself for not getting that info.

My guess is at minimum a GT2876

And max a GT3040

[Risking]

without knowing the inducer and exducer sizes its next to impossible to say. Its depends soely on those sizes.

Bring it around and ill rip the housings off and measure it up.

Like nismoid said its some form of t04S comp wheel so possibly a 52 trim front. I had a bit of info on the common R33 highflows and wheel selecetions somewhere but I cant find it atm.

A quick call to the guys that did it and they should be able to give you wheel part numbers at least even if they dont know the actual dimenssions.

[discopotato03]

Well the cartridge section appears to be a Garrett ball bearing GT30/T04S but someones machined out the VG30 BB turbine housing and R33 Skylines Hitachi compressor cover to fit .

I don't think Garrett would use those wheels in housings not designed for them so not too sure . The current GCG Hi Flow uses a smaller 7/14 blade compressor with a slightly larger turbine of a different family to the GT30UHP . I don't think I ever saw the higher capacity GCG Hi Flow but if anyone has a pic of one looking at the compressor I'd like to see it .

As to if it will surge ? The only way to know is to try it .

Had it been me I reckon I'd have used the GT2871R 48T BB cartridge like I think Dale FZ1 did because its wheels are a lot closer in size to what the Hitachi housings were designed to work with .

Cheers A .

[NYTSKY]

Ill give them a call tomorrow and get the part numbers.Ill post them up for discussions.

Thanks all.

[NYTSKY]

Well the cartridge section appears to be a Garrett ball bearing GT30/T04S but someones machined out the VG30 BB turbine housing and R33 Skylines Hitachi compressor cover to fit .

The cartridge is ball bearing and both housings where machined to the max i think.

Already i can see there must be a few specs of highflows out there.i hope this one isnt a lag monster.

[Dale FZ1]

The way to confirm easily is to read the numbers on the ID tag attached to the centre section. If you can, post them up please.

I'm aware of a GT2876 BB cored high flow, using the OP6 housing that performed without surge problems and supported around 250rwkW. Be interested to see if this unit is the same specs.

The difference in that approach to my 2871 48T was in the turbine, with lower gas velocity the compressor was not evidently enough to cause surge issues.

[NYTSKY]

The way to confirm easily is to read the numbers on the ID tag attached to the centre section. If you can, post them up please.

I'm aware of a GT2876 BB cored high flow, using the OP6 housing that performed without surge problems and supported around 250rwkW. Be interested to see if this unit is the same specs.

The difference in that approach to my 2871 48T was in the turbine, with lower gas velocity the compressor was not evidently enough to cause surge issues.

The numbers i got are:

Garrett

JK 0101 J

700177-5017

Hope this helps

[Risking]

Those numbers are really irrelevant with a high flow. you cant be sure of whats in there unless you measure it and check for yourself. Ive seen tagged turbos done by very reputable places that were tagged wrong etc.

I dont think its that large. Ive fitted R33 highflows where the comp housing snout was so thin I was worried about the weight of the clamp crushing the snout!

Personally im not a fan of any high flow turbo unless you have it built a specific spec. For the cost of 3037's etc these days I go with something I can view a comp map of first. Personaly preferance though.

At the end of the day you have had it done so wack it on and find out what its like.

[NYTSKY]

Looked at the Garrett site and its definatley in the GT30 family.

700177 matches the CHRA of the GT30.

But cant find the -5017 bit.

[NYTSKY]

Those numbers are really irrelevant with a high flow. you cant be sure of whats in there unless you measure it and check for yourself. Ive seen tagged turbos done by very reputable places that were tagged wrong etc.

I dont think its that large. Ive fitted R33 highflows where the comp housing snout was so thin I was worried about the weight of the clamp crushing the snout!

Personally im not a fan of any high flow turbo unless you have it built a specific spec. For the cost of 3037's etc these days I go with something I can view a comp map of first. Personaly preferance though.

At the end of the day you have had it done so wack it on and find out what its like.

I was told by Precision to be careful with the clamp as exteme force will break it.

[Risking]

so did you have a whole core and wheels purchased?? then the housings machined or was the turbo built from parts??

[R31Nismoid]

Thats just the cartride, generally you wont know what wheels from that.

CHRA = 700177-5017

CHRA = Centre Housing Rotating Assembly

As Risking said, some other wheels could have been slapped on there and you wouldnt even realise.

Ive seen similar things happen myself where the ID tag lists one thing.

But other wheels were substituted and stuck on a different CHRA.