Hi all,

The old turbo was on the way out so I ordered a Hybrid (S212) from Turbo Technics.

It's essentially a Garrett GT1749v with modified innards incase anyone is wondering and it was a direct replacement for the old donkey.

Trouble is, there is next to no boost below 2200-2500 rpm. After this it spools up and boosts nicely, sounds good too. It feels like its running very lean if anything :S

I know the VNT mechanism works on the new turbo as I checked it prior to fitting. No faults have come up o VCDS either.

Is it down to the fact it's a hybrid and the assumption it will be fitted to a modified car? I went for it as it was only £100 more than a standard refurb 1749v and comes with stronger internals.

I am planning on a remap at some stage.

I didn't expect any boost related problems from a standard map as the reworked turbine and compressor wheels should lend themselves to quicker spooling according to TT.

Anyone have any thoughts on this?

you fitted a hybrid and havent mapped it??? :rofl:

Correct. It's being remapped in the near future but the funds that were in place have gone on more important things.

you answerd the question yourself i think buddy no remap.

you have fitted a larger turbo so lots of things need to also change for it to work well with the car.

and until this is done the car will more than likely be running very lean

lean and engines dont mix well usually goes bang

Edited 30 March, 201016 yr by westallc

read the first post and the first question to enter my head was had you got it remapped as well

be careful doing what you are doing, if you run lean you could potentially cause issues big style with your engine.

Yep, get it mapped correctly and pronto. It will be doing the turbo no good with the standard map's boost requests.

Steve

Fair enough, I'll get it remapped ASAP.

As I say, I was planning on getting it done this week but something urgent came up that required the remap money and the car was already in for the turbo

I think the actuator isn't setup correctly. It needs to be long enough so when x y z tells the actuator to start giving boost, the VNT mechanism in the correct point. It is tough to explain but if a clueless person has setup up the actuator length without testing on the car, then this can explain it.

i wouldnt drive it until you go to get the map sorted pal.

ythe last thing you want is to kill the turbo and worse the engine

Balls.

I wish I'd just got a standard one fitted and be done with it

Me and my bright ideas

nows the perfect chance(and excuse) to get a custom map.

nows the perfect chance(and excuse) to get a custom map.

That was the plan but my bad luck came to the fore and the £700 I had stashed away has gone elsewhere in a hurry.

I honestly didn't think having the hybrid without the map would be that much of an issue for the short term. I've found quite a few examples of people in the same boat as me with a lack of low end boost being the only real problem

That was the plan but my bad luck came to the fore and the £700 I had stashed away has gone elsewhere in a hurry.

I honestly didn't think having the hybrid without the map would be that much of an issue for the short term. I've found quite a few examples of people in the same boat as me with a lack of low end boost being the only real problem

your best bet is to find someone with VCDS get some logging and done and make sure all is ok. if its just lack of boost and not anything dodgy thanyou good to go for a while

your best bet is to find someone with VCDS get some logging and done and make sure all is ok. if its just lack of boost and not anything dodgy thanyou good to go for a while

Already run a scan, nothing abnormal on the DTC front. I have the full fat version of VCDS.

I'll run some logs of the boost pressure - required and actual - to get an idea about what is going on.

That is group 11 in the measuring blocks.

For info, if you're previous turbo requested XX - your new turbo will not request any more as that is preset. But you will need to probably adjust the actuator to affect when the turbo kicks in. An experienced TDI turbo remapper / mechanic should know exactly how this is done.

That is group 11 in the measuring blocks.

For info, if you're previous turbo requested XX - your new turbo will not request any more as that is preset. But you will need to probably adjust the actuator to affect when the turbo kicks in. An experienced TDI turbo remapper / mechanic should know exactly how this is done.

Thanks Jason, duly noted

Like Jason says get the actuator checked. From what I've read the actuators arn't normally setup correctly.

I have to ask what are all the running lean comments for?

Dervs always run with an excess of air, eg lean.

From memory, most turbos have between 3 to 5 mm pre load on the actuators.