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Model specific boards => Golf mk4 => Topic started by: hamps on 04 October 2013, 22:11

Title: My Turbo is very slow!
Post by: hamps on 04 October 2013, 22:11

Hi guys

I have a 1.8 20v turbo which just feels under powered  :whistle:

It has the AUM engine, which had a proper rebuild and a new turbo last year, engine sounds lovely, car drives real nice but it boosts at what feels like 8psi tops!  :sad:

This is my first petrol turbo Golf Iv'e had it two weeks.

It had a Forge dv on it and some pathetic excuse of an induction kit :grin:

I have purchased a standard air box and fitted that and re fitted the standard re circ valve and re set the actuator using the 3 turn method and it still feels underpowered, you can here the turbo very faintly then a little silent hiss between gear changes with the Forge dv in place!

I know it's standard but surely I should get a little kick, or some torque steer?

Any help what to check greatly appreciated  :smiley:

I plugged it in no faults present, not got vag-com because I run a mac   :undecided:

Title: Re: My Turbo is very slow!
Post by: Chris#101 on 04 October 2013, 22:19

The 150s were fairly 'flat' as standard. Get it mapped will be a different car  :wink:

Title: Re: My Turbo is very slow!
Post by: hamps on 04 October 2013, 22:24

OK cheers, will look into it.

I heard the N75 can fail? where is it and can I test it?

Title: Re: My Turbo is very slow!
Post by: Wazzzer on 05 October 2013, 09:00

If you're getting 8psi it sounds like it's fine, just standard.

You won't get any torque steer even on a mapped car, I don't get any on mine

Title: Re: My Turbo is very slow!
Post by: Rhyso on 05 October 2013, 11:46

Quote from: Wazzzer on 05 October 2013, 09:00

If you're getting 8psi it sounds like it's fine, just standard.

You won't get any torque steer even on a mapped car, I don't get any on mine

Thats because you petrol boys cant produce enough torque  :tongue:

Title: Re: My Turbo is very slow!
Post by: Dave_IOW on 05 October 2013, 12:28

First time I drove mine I also thought the turbo was missing :grin:

Remap fixes that, it will be the singularly best modification you do to a car.

Title: Re: My Turbo is very slow!
Post by: leigh_harty on 05 October 2013, 12:33

Quote from: Dave_IOW on 05 October 2013, 12:28

First time I drove mine I also thought the turbo was missing :grin:

Remap fixes that, it will be the singularly best modification you do to a car.

And the singularly best mod to start causing you problems, especially if your car is standard and your boost hoses for example are the originals.... potentially a remap can cost more than expected.

My 150 agu doesn't feel that slow unless your doing a rolling start then its just pants. rag it from the off and its still got some go! maybe I've just got an healthy engine for now  :lipsrsealed:

Title: Re: My Turbo is very slow!
Post by: Dave_IOW on 06 October 2013, 03:48

Problems you have prior to map will be highlighted, yes.

What else can you spend £200 on and get 50 extra HP? Even if you do have to replace your (already) failing parts?

Title: Re: My Turbo is very slow!
Post by: GTIJas on 06 October 2013, 08:24

Agreed, hands down best purchase I've ever made for a car. £250 inc. rolling road at Jabbasport went from 148 to 203. Transformation of the car