Turbo shuffle again - GT-R Register - Official Nissan Skyline and GTR Owners Club forum

Peter GTR32 · 2nd August 2008, 12:35 PM

Hi can someone please help to answer how to solve the turbo shuffle I got in my car. I had the shuffle also with my old setup GT-SS turbo's but not so much as now with 2860-5 and remapping. I'm running Greddy hard pipe kit, D-jetro, Apexi air filters open dump valve

1. Can something be damaged cause of this shuffle?

2. What to do to get rid of this shuffle?

Is it caused of bad mapping or different adjusted waste gates or what could it be?
I have searched and read some different threads about this but cant really find out what it could be with my set up?
Most of the others run with AFM:s and std Twin turbo pipe

kismetcapitan · 2nd August 2008, 12:59 PM

it can be argued, but I believe shuffle can help wear out turbo bearings. However, some people don't use BOVs at all, and their turbos are fine. So I'd consider it more an annoyance than anything else.

IIRC, I corrected my shuffling during cruise by adding some more fuel to the injection map. Well, I can't remember exactly what I did, but remapping the problem areas pretty much got rid of 90% of shuffle. I only had it at part throttle on the highway anyways.

Ian C · 2nd August 2008, 04:38 PM

you can fit a modified twin turbo pipe, helps with shuffle quite a bit.
I'm currently doing a deal with the GTROC shop to make them available ASAP!

read this thread:

Testing modified Twin turbo pipe page 3 shows the part in discussion!

Cheers
Ian

Peter GTR32 · 2nd August 2008, 06:43 PM

Quote:

Originally Posted by Ian C

you can fit a modified twin turbo pipe, helps with shuffle quite a bit.
I'm currently doing a deal with the GTROC shop to make them available ASAP!

read this thread:

Testing modified Twin turbo pipe page 3 shows the part in discussion!

Cheers
Ian

Ian I run with Greddy hard pipe kit and it shouldnt be a problem or?

UKPAISLEY · 2nd August 2008, 06:48 PM

I would think that adjustable actuators would help, this is the reason I have some, it allows the turbos to be balanced while the wastegate opens , and allows the opening time to be adjusted.

kismetcapitan · 2nd August 2008, 06:53 PM

aren't most actuators adjustable, and I was thinking of posting a thread - setting actuators so that each turbo is perfectly in sync with the other seems to be a neglected step. God knows it's not the easiest thing to do, but it's not any harder than degreeing cams. Just tedious is all.

UKPAISLEY · 2nd August 2008, 06:57 PM

I havent done a search on it yet, but most standard actuators are just a solid shaft, cost I suppose. The setting needs to be low enough to open before youre desired boost, but not to low as to make the duty cycle of the boost sol work over time. My setting is going to be about 4 PSI below the boost set point.

Peter GTR32 · 2nd August 2008, 08:55 PM

Quote:

Originally Posted by kismetcapitan

aren't most actuators adjustable, and I was thinking of posting a thread - setting actuators so that each turbo is perfectly in sync with the other seems to be a neglected step. God knows it's not the easiest thing to do, but it's not any harder than degreeing cams. Just tedious is all.

Yes the actuators is adjustable on my 2860-5 but I think it could be little tricky to do this. Need double boost gauges but could be hard to have a look on both in the same time

UKPAISLEY · 2nd August 2008, 08:58 PM

Dosent help much but I intend to "tune" mine off the car, and fit later. All You ould need to do is adjust one a little and see if it makes a diff. Just keep note of how many turns.

jaycabs · 3rd August 2008, 12:34 AM

Quote:

Originally Posted by Peter GTR32

Hi can someone please help to answer how to solve the turbo shuffle I got in my car. I had the shuffle also with my old setup GT-SS turbo's but not so much as now with 2860-5 and remapping. I'm running Greddy hard pipe kit, D-jetro, Apexi air filters open dump valve

1. Can something be damaged cause of this shuffle?

2. What to do to get rid of this shuffle?

Is it caused of bad mapping or different adjusted waste gates or what could it be?
I have searched and read some different threads about this but cant really find out what it could be with my set up?
Most of the others run with AFM:s and std Twin turbo pipe

i had very bad shuffle ages ago making it a nightmare to drive when changing gears but then i let rk tuning remap my car and honestly it never shuffled once again

pupsi · 3rd August 2008, 01:15 AM

What about installing a balance pipe?????

frostmotorsport · 4th August 2008, 01:06 AM

so.... by modifying the "twin-turbo" pipe to remove shuffle (which is something I'm now contemplating) - does this remove the wonderful noise that the BOV's make chattering to each other on light-throttle gear changes? cos I wanna keep that and on-throttle shuffle is not really a problem in my current tune....

GT-R Glenn · 4th August 2008, 05:49 AM

Quote:

so.... by modifying the "twin-turbo" pipe to remove shuffle

Where did you get that from ?

The balance pipe goes between the exhaust manifolds.

Should be able to tune shuffle out.

Ian C · 4th August 2008, 07:16 AM

Quote:

Originally Posted by GT-R Glenn

Where did you get that from ?

I made one myself as part of rebuild this year (check pages 4 & 8 of the link in my signature)
Hoping to get them in the GTROC shop within August (on an exchange basis)

Ian

UKPAISLEY · 4th August 2008, 08:23 AM

Even with a balance on the exhaust side, ie the input gas, if the actuators are not matched then the turbo will respond diff according to boost pressure ?

2nd August 2008, 12:35 PM	#1 (permalink)
Peter GTR32 GTR Register Member Join Date: Nov 2004 Location: Sweden Posts: 217	Turbo shuffle again Hi can someone please help to answer how to solve the turbo shuffle I got in my car. I had the shuffle also with my old setup GT-SS turbo's but not so much as now with 2860-5 and remapping. I'm running Greddy hard pipe kit, D-jetro, Apexi air filters open dump valve 1. Can something be damaged cause of this shuffle? 2. What to do to get rid of this shuffle? Is it caused of bad mapping or different adjusted waste gates or what could it be? I have searched and read some different threads about this but cant really find out what it could be with my set up? Most of the others run with AFM:s and std Twin turbo pipe

2nd August 2008, 04:38 PM	#3 (permalink)
Ian C GTROC Member Join Date: Jun 2003 Location: Buckingham Posts: 1,261	you can fit a modified twin turbo pipe, helps with shuffle quite a bit. I'm currently doing a deal with the GTROC shop to make them available ASAP! read this thread: Testing modified Twin turbo pipe page 3 shows the part in discussion! Cheers Ian __________________ +10 extra bhp for £55.... Get your baffled TWIN TURBO pipe now from GTR.co.uk Shop Last edited by Ian C; 2nd August 2008 at 04:42 PM.

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2nd August 2008, 12:59 PM	#2 (permalink)
kismetcapitan GTR Register Member Join Date: Nov 2005 Location: Seoul Korea Posts: 6,402	it can be argued, but I believe shuffle can help wear out turbo bearings. However, some people don't use BOVs at all, and their turbos are fine. So I'd consider it more an annoyance than anything else. IIRC, I corrected my shuffling during cruise by adding some more fuel to the injection map. Well, I can't remember exactly what I did, but remapping the problem areas pretty much got rid of 90% of shuffle. I only had it at part throttle on the highway anyways.

2nd August 2008, 06:48 PM	#5 (permalink)
UKPAISLEY GTR Register Member Join Date: Jan 2003 Location: NORTH EAST Posts: 292	I would think that adjustable actuators would help, this is the reason I have some, it allows the turbos to be balanced while the wastegate opens , and allows the opening time to be adjusted.

2nd August 2008, 06:53 PM	#6 (permalink)
kismetcapitan GTR Register Member Join Date: Nov 2005 Location: Seoul Korea Posts: 6,402	aren't most actuators adjustable, and I was thinking of posting a thread - setting actuators so that each turbo is perfectly in sync with the other seems to be a neglected step. God knows it's not the easiest thing to do, but it's not any harder than degreeing cams. Just tedious is all.

2nd August 2008, 06:57 PM	#7 (permalink)
UKPAISLEY GTR Register Member Join Date: Jan 2003 Location: NORTH EAST Posts: 292	I havent done a search on it yet, but most standard actuators are just a solid shaft, cost I suppose. The setting needs to be low enough to open before youre desired boost, but not to low as to make the duty cycle of the boost sol work over time. My setting is going to be about 4 PSI below the boost set point.

2nd August 2008, 08:58 PM	#9 (permalink)
UKPAISLEY GTR Register Member Join Date: Jan 2003 Location: NORTH EAST Posts: 292	Dosent help much but I intend to "tune" mine off the car, and fit later. All You ould need to do is adjust one a little and see if it makes a diff. Just keep note of how many turns.

3rd August 2008, 01:15 AM	#11 (permalink)
pupsi GTROC Member Join Date: Aug 2006 Location: West London Posts: 1,944	What about installing a balance pipe?????

4th August 2008, 01:06 AM	#12 (permalink)
frostmotorsport GTR Register Member Join Date: Aug 2007 Location: Wellington, NZ Posts: 767	so.... by modifying the "twin-turbo" pipe to remove shuffle (which is something I'm now contemplating) - does this remove the wonderful noise that the BOV's make chattering to each other on light-throttle gear changes? cos I wanna keep that and on-throttle shuffle is not really a problem in my current tune....

4th August 2008, 08:23 AM	#15 (permalink)
UKPAISLEY GTR Register Member Join Date: Jan 2003 Location: NORTH EAST Posts: 292	Even with a balance on the exhaust side, ie the input gas, if the actuators are not matched then the turbo will respond diff according to boost pressure ?