Author Topic: My Turbo is very slow!  (Read 1753 times)

Offline hamps

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My Turbo is very slow!
« 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:
Demon Dipping UK
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Offline Chris#101

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Re: My Turbo is very slow!
« Reply #1 on: 04 October 2013, 22:19 »
The 150s were fairly 'flat' as standard. Get it mapped will be a different car  :wink:


          2003 1.8T: R-tech Live Cutom Stage 2 remap: N249 Bypass : Forge T.I.P : Forge 007p  : Forge Actuator, yellow spring : Toyosports F.M.I.C : Toyosports C.A.I :                                                                   PCV simplified - oil catch can : 42' Draft 3" turbo back non res exhaust system : Devils own W.M.I : 231bhp & 258lbs-ft

Offline hamps

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Re: My Turbo is very slow!
« Reply #2 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?
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water transfer printing and custom refinishing specialists.
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Offline Wazzzer

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Re: My Turbo is very slow!
« Reply #3 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


1999 1.8T: R-Tech remap - 225bhp/256lb/ft : K03s : THS FMIC : THS PCR pipe : 2.5" stainless exhaust : THS FR3 Engine mounts : G60/VR6 clutch : Calibra Yellow injectors : VR6 MAF : Devils Own WMI : Forge 007p : Carbonio CAI : Leon Cupra R Brembos : FK AK Street coilovers : Votex skirts : Anniversary front : click ---> http://www.golfgtiforum.co.uk/index.php?topic=92175

Offline Rhyso

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Re: My Turbo is very slow!
« Reply #4 on: 05 October 2013, 11:46 »
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:

Offline Dave_IOW

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Re: My Turbo is very slow!
« Reply #5 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.
Project: Mk2 20vT trackslag
Daily: Mk2 GTI typ19

Offline leigh_harty

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Re: My Turbo is very slow!
« Reply #6 on: 05 October 2013, 12:33 »
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:
Dont lose your dinosaur!

Offline Dave_IOW

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Re: My Turbo is very slow!
« Reply #7 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?
Project: Mk2 20vT trackslag
Daily: Mk2 GTI typ19

Offline GTIJas

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Re: My Turbo is very slow!
« Reply #8 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
1.8T 20v Stage 1 generic Jabbasport
<a href="http://s742.photobucket.com/user/VwjasGTi/media/20131006_131816_zpsb661ba02.jpg.html" target="_blank"><img src="http://i742.photobucket.com/albums/xx70/VwjasGTi/20131006_131816_zpsb661ba02.jpg" border="0" alt=" photo 20131006_131816_zpsb661ba02.jpg"/></a>