Author Topic: flat boost after 6,000 revs??  (Read 5074 times)

Offline joesgti

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flat boost after 6,000 revs??
« on: 20 November 2007, 13:47 »
my gti turbo kicks in at about 2000rpm and boosts up to 6000rpm after that is just flat??!! is this supposed to be or will others boost all the way to 6800rpm.
my old scooby used to go all the way through the gears to rev limit holding the boost till gear change, i also drove my mates golf 1.8t last night with revo remap, his is no where near as quick as mine but his holds the boost to the limit.
is there anything that will help this (d.v valve....intake...miltek)??

views would be appreciated.  :smiley:


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Offline SteveS

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Re: flat boost after 6,000 revs??
« Reply #1 on: 20 November 2007, 13:51 »
 duno much, but the forge dv is ment to hold boost longer.. thats what they claim
SteveS

ED30: Carbonio Intake & Filter | Blueflame TBE | Ebach Sportlines | Neuspeed Torque Arm Insert | Forge DV | REVO Stage2 [353BHP/360lb/ft]

Offline joesgti

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Re: flat boost after 6,000 revs??
« Reply #2 on: 20 November 2007, 15:18 »
duno much, but the forge dv is ment to hold boost longer.. thats what they claim

so does you go up to the limit holing the boost??  :undecided:


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Offline SteveS

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Re: flat boost after 6,000 revs??
« Reply #3 on: 20 November 2007, 15:19 »
i dont have the dv, but as standard erm... im not sure really. it pulls from about 2500 then drops off abit, but it apears to also pull higher up again after about 5-6 :-|
SteveS

ED30: Carbonio Intake & Filter | Blueflame TBE | Ebach Sportlines | Neuspeed Torque Arm Insert | Forge DV | REVO Stage2 [353BHP/360lb/ft]

Offline Hurdy

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Re: flat boost after 6,000 revs??
« Reply #4 on: 20 November 2007, 15:36 »
Standard GTI boost comes in earlier and should stay to the redline
ED30 boost comes in higher and only just starts to tail off before the redline.

The tail off in torque will be more noticeable on the std GTI as the torque curve also drops off earlier.

look at the links below for the graphs.

http://www.superchips.co.uk/curves/vw2lfsiturbo.pdf

http://www.superchips.co.uk/curves/VWGolfGTIEdition30.pdf
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Offline Kiddfrost

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Re: flat boost after 6,000 revs??
« Reply #5 on: 20 November 2007, 15:53 »
my gti turbo kicks in at about 2000rpm and boosts up to 6000rpm after that is just flat??!! is this supposed to be or will others boost all the way to 6800rpm.
my old scooby used to go all the way through the gears to rev limit holding the boost till gear change, i also drove my mates golf 1.8t last night with revo remap, his is no where near as quick as mine but his holds the boost to the limit.
is there anything that will help this (d.v valve....intake...miltek)??

views would be appreciated.  :smiley:

Once remapped that's about right. I think what you're feeling is the lack of torque at high revs. This is greatly exaggerated after a remap (Revo used as example) as you have a massive increase in torque at 3.5k and its just a steep decline from then on  :sad:
BHP increases at a good rate until around 5k and then it starts to level off, so with the combination of this, the decline in torque and that fantastic midrange rush, it can sometimes feel a bit limp above 5.5k rpm. The ed30 is much better up top as its larger turbo will provide a higher level of boost at higher rpm.
I've got mine a little better by doing some data logging with VAGCOM and altering boost/timing with an sps switch.
A Milltek and hi flow filter will make things a little better but to get the most out of these you will need a remap designed around these 2 items installed. e.g Revo stage 2.

Offline joesgti

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Re: flat boost after 6,000 revs??
« Reply #6 on: 20 November 2007, 15:53 »
Standard GTI boost comes in earlier and should stay to the redline
ED30 boost comes in higher and only just starts to tail off before the redline.

The tail off in torque will be more noticeable on the std GTI as the torque curve also drops off earlier.

look at the links below for the graphs.

http://www.superchips.co.uk/curves/vw2lfsiturbo.pdf

http://www.superchips.co.uk/curves/VWGolfGTIEdition30.pdf

graphs wont open  :sad:


GTI MK5
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Offline Hurdy

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Re: flat boost after 6,000 revs??
« Reply #7 on: 20 November 2007, 15:55 »
Standard GTI boost comes in earlier and should stay to the redline
ED30 boost comes in higher and only just starts to tail off before the redline.

The tail off in torque will be more noticeable on the std GTI as the torque curve also drops off earlier.

look at the links below for the graphs.

http://www.superchips.co.uk/curves/vw2lfsiturbo.pdf

http://www.superchips.co.uk/curves/VWGolfGTIEdition30.pdf

graphs wont open  :sad:

Just tried them and they do on my PC. Have you got adobe reader on your PC?

If not then just go to the superchips site and select the GTI and the ED30 and go into the graph "view power curve"

http://www.superchips.co.uk/models.php
Seat Leon Cupra Black 290 DSG

Offline joesgti

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Re: flat boost after 6,000 revs??
« Reply #8 on: 20 November 2007, 16:03 »
my gti turbo kicks in at about 2000rpm and boosts up to 6000rpm after that is just flat??!! is this supposed to be or will others boost all the way to 6800rpm.
my old scooby used to go all the way through the gears to rev limit holding the boost till gear change, i also drove my mates golf 1.8t last night with revo remap, his is no where near as quick as mine but his holds the boost to the limit.
is there anything that will help this (d.v valve....intake...miltek)??

views would be appreciated.  :smiley:

Once remapped that's about right. I think what you're feeling is the lack of torque at high revs. This is greatly exaggerated after a remap (Revo used as example) as you have a massive increase in torque at 3.5k and its just a steep decline from then on  :sad:
BHP increases at a good rate until around 5k and then it starts to level off, so with the combination of this, the decline in torque and that fantastic midrange rush, it can sometimes feel a bit limp above 5.5k rpm. The ed30 is much better up top as its larger turbo will provide a higher level of boost at higher rpm.
I've got mine a little better by doing some data logging with VAGCOM and altering boost/timing with an sps switch.
A Milltek and hi flow filter will make things a little better but to get the most out of these you will need a remap designed around these 2 items installed. e.g Revo stage 2.

hummm... interesting. this is exactly what i experience after 5.5-6k. so because of the remap it feels alot more quicker midrange and because of the increase in power, mid range torque feels so much stronger.

so for example in a straight line race (drag) from still. would it be faster to 60mph and 1/4 mile to change at 6k or carry it on through to 6.8-7k??  :huh:


GTI MK5
Not the only GTI...........but the best! ; )

Offline Hurdy

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Re: flat boost after 6,000 revs??
« Reply #9 on: 20 November 2007, 16:14 »
Change up at 6k to avoid torque drop off and hitting the rev limiter on gearchange :wink:
Seat Leon Cupra Black 290 DSG