GolfGTIforum.co.uk
Model specific boards => Golf mk4 => Topic started by: Ainsleyg1981 on 16 October 2016, 20:07
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Hi all
Just brought a mk4 gti 20 valve turbo. I've wanted one for ages it's a bit tatty but I'm going to do it up to standard.
My question is it seems very slow and quite dissapointing actually. My wife has a touran which has been re-mapped to 190 bhp and that would leave my gti standing.
The air filter has been replaced with a k&n induction type which hasn't been fitted quite badly as it's flapping around and isn't secured to the mAf sensor properly so not sure if that's any cause.
The boost seems to be around 0.5 bar max is that normal?
Thanks for any help..
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Not surprising that a remapped car would leave what sounds like a neglected gti standing pal. Standard 1.8 T performance isn't anything special. A remap transforms the car to what it should have been from the factory.
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I've spoken to the guy from quantum who did my wife's diesel touran and he said the Bhp figure would be around 192 from the standard 150. He did say as I've got the throttle cable not fly by wire I will need a different chip fitted but that's as far as I got. The guy I brought it off seem to think it was the fastest thing ever but it's very underwhelming in fact.
Hopefully a new exhaust and air filter and remap will do the trick.
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Only early throttle cable 1.8Ts need the chip changing, all depends on what the part number is on ECU you have fitted
Mine is a 99 GTI with cable throttle and is mappable through the OBD port
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Did you need to get your chip changed before you could remap?
Did the power increase feel worth it? I'm really dissapointed with the standard power of mine it's really crap.
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Easiest way to check is have a look for your engine code - pop the hood and remove the main plastic cover (4 plastic screws). At the left hand side where the valve cover meets the head there should be a three letter code - AGU or similar.
Yes the remap is an absolute no brainier and makes the car a shed load better, just don't forget to tell your insurance ;-)
Als just realised you said 0.5bar - I think mine used to boost to 0.9bar when it was standard?
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Ok thanks. I'll check tomorrow. My mapping guy said you can't do any of the throttle cable engines until you change the ecu chip as it's not reprogrammable.
Not sure about the turbo then? There's certainly no kick back in my seat like any normal turbo car would give it's really rather wank to be honest. Like I say my wife's diesel touran would smash it on a drag race. :embarrassed:
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Ps
It's got a badly fitted cone type air filter which isn't secured to the mAf it's just falling around. Also it has a atmospheric dump valve which apparently isn't good is it for this engine?
I'm learning..... :wink:
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Throw the air filter and the dump valve in the bin and refit standard air box with a decent panel filter and use a standard dump valve :smiley:
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Do you think that's the reason for my lack of turbo power?
I want to get a forge 007 recirc and a piper cross induction kit. Will they be ok?
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Do you think that's the reason for my lack of turbo power?
I want to get a forge 007 recirc and a piper cross induction kit. Will they be ok?
Use a piper cross panel filter and standard dv :smiley: your lack of power could be anything from a simple split pipe or a sensor best getting it scanned for fault codes to give you a clue and a standard 1.8t won't feel fast or throw you back in your seat
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I've got a fault code reader I'll plug it tomorrow then and see.
Sounds like mine doesn't have a problem then if you say they aren't much good standard it must just be that then. It boosts at 0.5 max.
Does a remap really make a big difference? Does that throw you back in your seat? Don't wanna spend loads on performance if I'm tuning a waste of time.
My old leyland daf was more inspiring than this gti "turbo" :angry:
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My mapping guy said you can't do any of the throttle cable engines until you change the ecu chip as it's not reprogrammable.
Your mapping guy is wrong :wink:
My ECU didn't need the chip changing as it was the later AGU ECU. You need to see what ECU yours has fitted as they changed them mid 99. The AGU ECU is write only so the map needs to be emulated on a PC but it can definitely be flashed via the ODB port if it's a later ECU
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I'd spend your time and money fitting standard parts and get some service work done, which it sounds likely hasn't been done. Even source 2nd hand such as the airbox etc.
Don't polish the proverbial, if you haven't got sound foundations to work on.
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Sound advice from Mr_Orange.
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I have a 1998 1.8T with an AGU engine. It as remapped at RTech nearly 40,000 miles ago. Lots of torque now, if peaks at higher torque figures than a standard TT with the 225 BAM engine and so it pulls well by the time you get to 2.5K revs. BHP only went up to 183 from the original 150. I still enjoy driving the car after owning it for 18 years as you can feel it pull much better.
So get it to somewhere like RTech who will check it is running OK before mapping.
However, having a remap is a slippery slope as after the remap you will want more and more.
I haven't done much else apart from an ITG filter.
Having the 1.8T remapped gave me a taste for it and so I have done much more than stage 1 to my S3 8P. At the moment it is running approx 375 BHP and 390 ft lbs
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I have a 1998 1.8T with an AGU engine. It as remapped at RTech nearly 40,000 miles ago. Lots of torque now, if peaks at higher torque figures than a standard TT with the 225 BAM engine and so it pulls well by the time you get to 2.5K revs. BHP only went up to 183 from the original 150. I still enjoy driving the car after owning it for 18 years as you can feel it pull much better.
So get it to somewhere like RTech who will check it is running OK before mapping.
However, having a remap is a slippery slope as after the remap you will want more and more.
I haven't done much else apart from an ITG filter.
Having the 1.8T remapped gave me a taste for it and so I have done much more than stage 1 to my S3 8P. At the moment it is running approx 375 BHP and 390 ft lbs
R- tech can't map his car :smiley:
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Mine is also mapped by R-Tech (who unfortunately cannot map the AGU any more) and always puts a smile on my face when I drive it
Damn Barry you beat me to it
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Mine is also mapped by R-Tech (who unfortunately cannot map the AGU any more) and always puts a smile on my face when I drive it
Damn Barry you beat me to it
Mine is also mapped by them and that's 3 years I have had it mapped making it the longest car in my possession :smiley:
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I did not realise that R Tech cannot map the 1.8T any more. Something I have missed, why has this happened?
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I did not realise that R Tech cannot map the 1.8T any more. Something I have missed, why has this happened?
Just the cable throttle as far as I'm aware. Fly by wire such as AUM etc still OK with those guys ;-)
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Yup the emulator they had is broken so no more AGU maps from them. There are others out there though :wink:
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Mine is a throttle cable AGU and so hopefully it will keep on running!
Thanks for letting me know
Peter