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Author Topic: No boost leaks but not 1oo% power  (Read 3117 times)

Offline oceanic-green

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No boost leaks but not 1oo% power
« on: 03 July 2012, 15:03 »
OK, I have eliminated all boost leaks, with a catch can and the usual silicone hoses, tip, charge pipe, 5 piece turbo boost hose kit ect ect. Plus I had a smoke test yesterday which suggested the dipstick, which I have now sealed up. I have a forge 007 dv, new N75 and new maf, ( both 5 months old) new coolant temp sensor. My boost gauge sits at 20-22 on idle.

I can feel that that it boosts but holds back in 2nd and 3rd. At a guess it is probably about 175-180 bhp, running a stage one r-tech remap, and as it is an Aum should be about 200+ bhp.

What should I check next? I have free version of vag com, but there are no fault codes showing!
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Mods: R-Tech custom remap, Beachbuggy K250 Turbo, Forge 007 DV, RAMAIR Jetstream 108 induction filter, silicone piping throughout, R-Tech Supersize TIP, 42 Draft Stealth Catch Can, N249 bypass, Ported Manifold, Toyo Sports FMIC with 2 & 1/2 pipes, Custom made full turbo back exhaust & 2 & 1/2 " downpipe and 200 cell sports cat. BAM injectors, Turbosmart Boost Gauge, BBS CK Wheels, 312mm Brembo front discs and pads, Carbon canister delete and last of all, a liquid cube!

Offline Rhyso

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Re: No boost leaks but not 1oo% power
« Reply #1 on: 03 July 2012, 15:05 »
Not 100% sure what you can log with the basic VAGCOM but try and log your boost / MAF values

Think the MAF is block 2/3
Boost is 110 / 115

If you can log your MAF you can do a crude calculation to work out your approx bhp
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Offline oceanic-green

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Re: No boost leaks but not 1oo% power
« Reply #2 on: 03 July 2012, 15:09 »
Quote from: Rhyso on 03 July 2012, 15:05
Not 100% sure what you can log with the basic VAGCOM but try and log your boost / MAF values

Think the MAF is block 2/3
Boost is 110 / 115

If you can log your MAF you can do a crude calculation to work out your approx bhp

Thanks!

I think I can only log up to blocks 25, so I should be able to do the maf readings. So am I right in thinking I log blocks 2 & 3 or are saying it is 2 or 3.

Do I need to rev it and keep it at a certain rev, or do I need to drive it while doing it (with someone else of course logging it)
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Mods: R-Tech custom remap, Beachbuggy K250 Turbo, Forge 007 DV, RAMAIR Jetstream 108 induction filter, silicone piping throughout, R-Tech Supersize TIP, 42 Draft Stealth Catch Can, N249 bypass, Ported Manifold, Toyo Sports FMIC with 2 & 1/2 pipes, Custom made full turbo back exhaust & 2 & 1/2 " downpipe and 200 cell sports cat. BAM injectors, Turbosmart Boost Gauge, BBS CK Wheels, 312mm Brembo front discs and pads, Carbon canister delete and last of all, a liquid cube!

Offline oceanic-green

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Re: No boost leaks but not 1oo% power
« Reply #3 on: 03 July 2012, 15:25 »
Just found a file download with "instructions for logging with vagcom"  :smiley:
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Mods: R-Tech custom remap, Beachbuggy K250 Turbo, Forge 007 DV, RAMAIR Jetstream 108 induction filter, silicone piping throughout, R-Tech Supersize TIP, 42 Draft Stealth Catch Can, N249 bypass, Ported Manifold, Toyo Sports FMIC with 2 & 1/2 pipes, Custom made full turbo back exhaust & 2 & 1/2 " downpipe and 200 cell sports cat. BAM injectors, Turbosmart Boost Gauge, BBS CK Wheels, 312mm Brembo front discs and pads, Carbon canister delete and last of all, a liquid cube!

Offline Rhyso

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Re: No boost leaks but not 1oo% power
« Reply #4 on: 03 July 2012, 15:27 »
It is either Block 2 or 3  :smiley:

Full throttle run from 1500rpm to the red line in 3rd

What you should see from the MAF readings is a nice steady increase towards the peak BHP; take the highest figure and divide by 0.8 to give you a rough idea  :smiley:

If you have fluctuations in your MAF then its either your MAF or something, somewhere is causing it to read low
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Offline oceanic-green

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Re: No boost leaks but not 1oo% power
« Reply #5 on: 03 July 2012, 15:31 »
Quote from: Rhyso on 03 July 2012, 15:27
It is either Block 2 or 3  :smiley:

Full throttle run from 1500rpm to the red line in 3rd

What you should see from the MAF readings is a nice steady increase towards the peak BHP; take the highest figure and divide by 0.8 to give you a rough idea  :smiley:

If you have fluctuations in your MAF then its either your MAF or something, somewhere is causing it to read low

Wonderful stuff! Nice one  :smiley:
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Mods: R-Tech custom remap, Beachbuggy K250 Turbo, Forge 007 DV, RAMAIR Jetstream 108 induction filter, silicone piping throughout, R-Tech Supersize TIP, 42 Draft Stealth Catch Can, N249 bypass, Ported Manifold, Toyo Sports FMIC with 2 & 1/2 pipes, Custom made full turbo back exhaust & 2 & 1/2 " downpipe and 200 cell sports cat. BAM injectors, Turbosmart Boost Gauge, BBS CK Wheels, 312mm Brembo front discs and pads, Carbon canister delete and last of all, a liquid cube!

Offline Dalo Harkin

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Re: No boost leaks but not 1oo% power
« Reply #6 on: 03 July 2012, 15:55 »
Quote from: oceanic-green on 03 July 2012, 15:03
OK, I have eliminated all boost leaks, with a catch can and the usual silicone hoses, tip, charge pipe, 5 piece turbo boost hose kit ect ect. Plus I had a smoke test yesterday which suggested the dipstick, which I have now sealed up. I have a forge 007 dv, new N75 and new maf, ( both 5 months old) new coolant temp sensor. My boost gauge sits at 20-22 on idle.

I can feel that that it boosts but holds back in 2nd and 3rd. At a guess it is probably about 175-180 bhp, running a stage one r-tech remap, and as it is an Aum should be about 200+ bhp.

What should I check next? I have free version of vag com, but there are no fault codes showing!

In terms of being low on power, could be loads of things, actuator being one of them, MAF as you have said, exhaust system etc etc
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ARZ K03s, Oettinger Side Skirts, R32 front, Carbon stage 2, Forge 007p (yellow spring), Forge Actuator (yellow spring), Pipercross panel filter with DSG parts, N249 and N112 deleted, SAI deleted, Carbon canister deleted, Rear wiper deleted, Long Life turbo back custom exhaust with 200 cell sports cat, VR6/G60 clutch kit, Creation Motorsport TIP, Catch can, 'Wellycooler', K04 charge pipe, S3 ported inlet manifold - looks pretty standard on the outside though :)

Offline daz veedub

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Re: No boost leaks but not 1oo% power
« Reply #7 on: 03 July 2012, 15:59 »
ignition amp  :undecided:
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Offline oceanic-green

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Re: No boost leaks but not 1oo% power
« Reply #8 on: 03 July 2012, 16:23 »
Quote from: Dalo Harkin on 03 July 2012, 15:55

In terms of being low on power, could be loads of things, actuator being one of them, MAF as you have said, exhaust system etc etc

I hope it isn't the maf, as I only bought a new one from TPS about 3-5 months ago. I will get the logging done this week when i can get someone to help me with it, and when it is a bit dryer  :wink:

Quote from: daz veedub on 03 July 2012, 15:59
ignition amp  :undecided:

I just googled this , and apparently if it is this then it will miss fire badly. Is that correct? Mine does not miss fire at all, well not that I have noticed.
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Mods: R-Tech custom remap, Beachbuggy K250 Turbo, Forge 007 DV, RAMAIR Jetstream 108 induction filter, silicone piping throughout, R-Tech Supersize TIP, 42 Draft Stealth Catch Can, N249 bypass, Ported Manifold, Toyo Sports FMIC with 2 & 1/2 pipes, Custom made full turbo back exhaust & 2 & 1/2 " downpipe and 200 cell sports cat. BAM injectors, Turbosmart Boost Gauge, BBS CK Wheels, 312mm Brembo front discs and pads, Carbon canister delete and last of all, a liquid cube!

Offline oceanic-green

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Re: No boost leaks but not 1oo% power
« Reply #9 on: 03 July 2012, 22:59 »
OK, an update. After taking the car for a spin earlier, the boost only holds at 9psi  :huh: So I plugged in my hand held code reader (as I didn't have my vagcom or laptop with me) and I get a code  :angry: 17608. So after googling it I see it is either the diverter valve, or the N249 valve. So i guess it can't be the DV because that is a Forge 007 which is only about a year or so old. So it must be the N249 valve.

It seems to be one thing after the next with these cars!!! I get one thing fixed and then it finds the next weakest thing to go. arghhhhhhhhh :angry:

How much is an N249 going to set me back, and do I just get a normal vw one from TPS or dealers, or is there a better after market one?
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Mods: R-Tech custom remap, Beachbuggy K250 Turbo, Forge 007 DV, RAMAIR Jetstream 108 induction filter, silicone piping throughout, R-Tech Supersize TIP, 42 Draft Stealth Catch Can, N249 bypass, Ported Manifold, Toyo Sports FMIC with 2 & 1/2 pipes, Custom made full turbo back exhaust & 2 & 1/2 " downpipe and 200 cell sports cat. BAM injectors, Turbosmart Boost Gauge, BBS CK Wheels, 312mm Brembo front discs and pads, Carbon canister delete and last of all, a liquid cube!
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