49mm hybrid turbo

[elite55]

Hi all, I've just got a hold of a new/ second hand turbo for my vectra c 1.9 cdti. I've started to give it a clean up before it goes on so that there's no vnt sticking. I've noticed the compressor wheel is a billet 49mm o/d, I know very little about turbos and was wondering if it would give a power increase with the right mapping or is the 49mm wheel to small? Any help as to weather it'll be any good or weather to put a bigger wheel in? Like I say I know very little about turbos so please be gentle lol

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[northpole]

You can't just put a bigger wheel on the housing will need to be skimmed to house whatever size diameter impeller you want to use... given the fact that you already point out that it is a hybrid turbo... well I suspect there isn't much material.left to put a bigger one in.

The problem with turbos is when they are on full chat for a small period of time they go really hot.. so hot that the darn thing will start to glow red.. and this is why you need to be very careful with skinming the housing. Remove to much and the metal will collapse... and with the turbo spinning at 1000k rpm it'll cause the thing to exploded.

It's best left to the professional turbo remanufacture that offer hybrid services... at least if it goes wrong you can claim damages.

[Fastcabs]

Sounds like you have a standard garret gt17 turbo. If you are asking about turning this turbo into a hybrid then yes it is possible and the compressor can be changed to 56mm to allow more power along with other modifications. As @northpole suggested if you want to do this then leave it to the professionals. Also it’ll be expensive and you’ll need to do other things to your car to make it worthwhile.

if you are asking about getting more power from a map then the standard turbo and engine is fine to handle quite a bit more power before you have to do physical upgrades. Lots of companies will offer this and it will be a lot cheaper for the bhp gains.

[elite55]

Thanks for the advice guys, I was going to have it reconditioned and a 56mm fitted professionally, but was also hoping that it would help to increase power with the 49mm wheel as there's no play or movement in the bearings. So I gather a 49mm wheel won't give any increase in power so I'll have to have it sent off to hybrid? Can you guys recommend a good hybrid turbo manufacturer?

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[elite55]

I was going to leave it to the pros anyway just hoping I got lucky with it as it came off an astra 1.9 cdti that was running supposedly around 230 bhp

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[Fastcabs]

I was going to leave it to the pros anyway just hoping I got lucky with it as it came off an astra 1.9 cdti that was running supposedly around 230 bhp

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It all depends what you’re looking for with your car. I got a stage one map done on my car which took it to 187hp and 435Nm torque. This was with everything standard. You can get different stage one maps that’ll give more bhp and less torque but without upgrading components you end up sacrificing driveability. To get 230hp from a z19dth, you need to be thinking FMIC, air filter upgrade, exhaust upgrade, getting rid of the DPF (if you have one), different clutch to handle the power, lsd to stop the torque steer then hybrid turbo. Injector upgrade is not necessarily required but some people upgrade to the insignia 2.0 ones.

AET will do you a hybrid for £700ish

[elite55]

Ideally I'd like to be around 200 ish at the wheels, I know I need to change other things to go with the turbo like front mounted intercooler, straight through exhaust and a good flowing air filter and silicone boost pipes. Is there a cheaper way to do the turbo as 700 is more than I want to spend when I've seen others on average around 500?

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