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Vigo exhaust 76mm - advice needed.

Discuss modifications on your new shape Hilux here. 2005 till current. Also called the Vigo in other countries.
muki
High Range 2WD
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Joined: Thu Dec 17, 2015 1:48 pm
Town: Cape Town
Vehicle: Hilux 3.0 D4d D/C 4x4 A/T
Real Name: Mohamed

Vigo exhaust 76mm - advice needed.

Postby muki » Mon Dec 05, 2016 12:16 am

I'm looking at upgrading my exhaust. I've got 09 hilux at with unichip in tuned by ksd. They recommended that with 76mm exhaust I would be able to push a bit more power safety.

Is there any disadvantages to fitting 76mm? Who in cape town would you recommend? And should it be done from the downpipe? Cat removed?

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JohanW
LR 4WD Rear Locker
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Vehicle: '09 Hilux 3.0 D4D 4x4 AT
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Re: Vigo exhaust 76mm - advice needed.

Postby JohanW » Mon Dec 05, 2016 5:04 pm

Muki, just be careful that you don't make that free flow too flowy. I made mine flow verrrrry well. Too well actually and now I get a intermittent (once every 3 months with ambient between 14-16 deg C) P1251 error and subsequent limp mode requiring a shutdown, wait 30sec and start to clear the error.

The stepper motor can't adjust fast enough to prevent a pressure spike in the intake manifold. This happens when you go from coasting/idling behind a truck and floor it it to go past. Not so nice when you go into limp mode then...

But since you mention that you have a chip. Its possible to have the boost threshold level moved or the P1251 error parameters adjusted.

I'm still stuck with a racechip while the unichip is lying in the drawer waiting to be fitted when the world turns a bit slower. I will do a post when the unichip gets fitted and resolves my problem.

So in short, it is possible to have the D4D flow too much. I must add I have a automatic and it seems to be a little more prone to get this P1251 error.
muki
High Range 2WD
High Range 2WD
Posts: 15
Joined: Thu Dec 17, 2015 1:48 pm
Town: Cape Town
Vehicle: Hilux 3.0 D4d D/C 4x4 A/T
Real Name: Mohamed

Re: RE: Re: Vigo exhaust 76mm - advice needed.

Postby muki » Mon Dec 05, 2016 5:45 pm

JohanW wrote:Muki, just be careful that you don't make that free flow too flowy. I made mine flow verrrrry well. Too well actually and now I get a intermittent (once every 3 months with ambient between 14-16 deg C) P1251 error and subsequent limp mode requiring a shutdown, wait 30sec and start to clear the error.

The stepper motor can't adjust fast enough to prevent a pressure spike in the intake manifold. This happens when you go from coasting/idling behind a truck and floor it it to go past. Not so nice when you go into limp mode then...

But since you mention that you have a chip. Its possible to have the boost threshold level moved or the P1251 error parameters adjusted.

I'm still stuck with a racechip while the unichip is lying in the drawer waiting to be fitted when the world turns a bit slower. I will do a post when the unichip gets fitted and resolves my problem.

So in short, it is possible to have the D4D flow too much. I must add I have a automatic and it seems to be a little more prone to get this P1251 error.

Thanks, I'll definitely keep this in mind. I'm thinking one. Or 2 boxes as I don't want it to be too noisy.

What type of power gains did you get? And who done your exhaust for you?

Sent from my 2014817 using Tapatalk
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JohanW
LR 4WD Rear Locker
LR 4WD Rear Locker
Posts: 421
Joined: Sat Nov 17, 2012 9:56 pm
Town: Strand
Vehicle: '09 Hilux 3.0 D4D 4x4 AT
Real Name: Johan

Re: RE: Re: Vigo exhaust 76mm - advice needed.

Postby JohanW » Mon Dec 05, 2016 10:56 pm

muki wrote:
JohanW wrote:Muki, just be careful that you don't make that free flow too flowy. I made mine flow verrrrry well. Too well actually and now I get a intermittent (once every 3 months with ambient between 14-16 deg C) P1251 error and subsequent limp mode requiring a shutdown, wait 30sec and start to clear the error.

The stepper motor can't adjust fast enough to prevent a pressure spike in the intake manifold. This happens when you go from coasting/idling behind a truck and floor it it to go past. Not so nice when you go into limp mode then...

But since you mention that you have a chip. Its possible to have the boost threshold level moved or the P1251 error parameters adjusted.

I'm still stuck with a racechip while the unichip is lying in the drawer waiting to be fitted when the world turns a bit slower. I will do a post when the unichip gets fitted and resolves my problem.

So in short, it is possible to have the D4D flow too much. I must add I have a automatic and it seems to be a little more prone to get this P1251 error.

Thanks, I'll definitely keep this in mind. I'm thinking one. Or 2 boxes as I don't want it to be too noisy.

What type of power gains did you get? And who done your exhaust for you?

Sent from my 2014817 using Tapatalk


Power gains... No idea. Turbo lag is gone though which makes quite a difference if you know how sluggish takeoff normally is with the AT. Need to get it on the dyno which will happen in the new year when I fit the dastek chip. Kept the original downpipe, since that is nice and big already. Then a single 67mm powerflow box and out the side in front of the right rear wheel. Not loud at all. Just a hearty grumble when the turbo vanes open up. 67mm pipe used from box onwards.
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Kaaskrul
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Vehicle: 2013 Hilux X-Cab 4x4
Real Name: Pierre

Re: Vigo exhaust 76mm - advice needed.

Postby Kaaskrul » Sun Dec 18, 2016 1:13 pm

KSD did my 76mm exhaust. De Graaff bolt on kit. From turbo to the back.
Pulls like a freight train, also with the Unichip.

Go for it!!
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JohanW
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Joined: Sat Nov 17, 2012 9:56 pm
Town: Strand
Vehicle: '09 Hilux 3.0 D4D 4x4 AT
Real Name: Johan

Re: Vigo exhaust 76mm - advice needed.

Postby JohanW » Mon Dec 19, 2016 3:21 pm

Kaaskrul wrote:KSD did my 76mm exhaust. De Graaff bolt on kit. From turbo to the back.
Pulls like a freight train, also with the Unichip.

Go for it!!


Pierre is your D4d a Auto?
muki
High Range 2WD
High Range 2WD
Posts: 15
Joined: Thu Dec 17, 2015 1:48 pm
Town: Cape Town
Vehicle: Hilux 3.0 D4d D/C 4x4 A/T
Real Name: Mohamed

Re: RE: Re: Vigo exhaust 76mm - advice needed.

Postby muki » Mon Dec 19, 2016 7:48 pm

Kaaskrul wrote:KSD did my 76mm exhaust. De Graaff bolt on kit. From turbo to the back.
Pulls like a freight train, also with the Unichip.

Go for it!!

When did you have it done? Last time I spoke to ksd they sent me to noise boys.

Can I ask how much it was? Can PM me if you prefer?

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