Anyone else notice this.
We just got the truck back from the cylinder head replacement and off the line performance and acelleration from a roll had alot of hesitation in it.

I went from a rental 07 Armada 4X4 to my 07 4X2 and it was a night and day differece.

I pulled the Volant and put the stock one back on and the hesitation was gone and the truck pulled pretty good in all cases.
I also heard some pinging with the Volant before I took it off.

I have the Gibson exhaust that is waiting for my 500 mile inspection from the dealer, then it will go on. I will try the Volant again and see if it has the same effects.

So far I like it better without the intake.

Herb

It sounds like your computer was reset to work with the factory intake and hasn't relearned the aftermarket yet. Our computers learn when you make changes to get the correct fuel air mix and it takes a little time. I'd check with scr38 but I have not heard of an intake making things slower ever.

Also an intake work well with exhaust. Intake alone will cause a little lost of low end IMO. Like Triple say let your ECU learn for a few hundred miles.

It sounds like your computer was reset to work with the factory intake and hasn't relearned the aftermarket yet. Our computers learn when you make changes to get the correct fuel air mix and it takes a little time. I'd check with scr38 but I have not heard of an intake making things slower ever.


The ECU maybe an adaptive learning ECU but they don't correct for aftermarket parts.
You usually see the biggest gain and notice the most when the intake is first installed. I have done/seen this many times on the dyno.

Intakes hardly show a loss in low end....except with heatsoak.
I figured it was not that much of an issue with the close box design of the Volant but it was pretty noticeable too me.

I'm pretty sure it was more noticeable coming from another Armada straight into mine in the same conditions.

The ECU maybe an adaptive learning ECU but they don't correct for aftermarket parts.
You usually see the biggest gain and notice the most when the intake is first installed. I have done/seen this many times on the dyno.

Intakes hardly show a loss in low end....except with heatsoak.
I figured it was not that much of an issue with the close box design of the Volant but it was pretty noticeable too me.

I'm pretty sure it was more noticeable coming from another Armada straight into mine in the same conditions.
Our computer does adapt for stock and not for aftermarket parts. That being the case though the aftermarket parts are generally either within the stock ranges or off one end, in which case the computer will compensate as much as possible. If the computer is sensing more air coming in etc. it will do as much as it can to adapt, so even though you won't get full benefits, you will get some. But you will need aftermarket programming to get full benefit.
Exhaust is where most loose the low end due to the lack of back pressure at lower rpms generated by the larger pipes. The power is often made up at the mid to high level RPMS. Heatsoak should not be a problem with the Titan/Armada intakes as most are cold air boxes and give you less heatsoak than stock, etc. It sounds like you have another problem as you surmised it shouldn't be and I haven't heard anyone else saying it is a problem with volant or other intakes on our vehicles like it is with other vehicles. It sounds like you are using experience with smaller rice rockets and relating it to ours, which doesn't translate often. I"d try resetting your computer with the ECU reset procedure. Hope this helps.

I'm just curious isn't the 4x4 slightly faster then the 4x2?

If anything, I would think the 4x2 would be faster due to having less drivetrain weight unless traction is an issue.

If anything, I would think the 4x2 would be faster due to having less drivetrain weight unless traction is an issue.

I've tried both ways from a stop..and to me 4x4 had a better take off...In 4x2 it feels like the Mada is pullin too much weigh.:D

Anyone else notice this.
We just got the truck back from the cylinder head replacement and off the line performance and acelleration from a roll had alot of hesitation in it.

I went from a rental 07 Armada 4X4 to my 07 4X2 and it was a night and day differece.

I pulled the Volant and put the stock one back on and the hesitation was gone and the truck pulled pretty good in all cases.
I also heard some pinging with the Volant before I took it off.

I have the Gibson exhaust that is waiting for my 500 mile inspection from the dealer, then it will go on. I will try the Volant again and see if it has the same effects.

So far I like it better without the intake.

Herb
The Volant should not cause this problem. However if you had an air leak (even a very small one) at the MAF sensor or anywhere downstream it could cause the problems. An air leak wouls cause a leaner mixture, which will cause the hesitation and pinging.

I've tried both ways from a stop..and to me 4x4 had a better take off...In 4x2 it feels like the Mada is pullin too much weigh.:D
Rear end ratios!
The 4X4 probably has the 3.36 ratio, and the 4X2 non Big Tow has a 2.94.
The 3.36 will be quicker off the line.

I've tried both ways from a stop..and to me 4x4 had a better take off...In 4x2 it feels like the Mada is pullin too much weigh.:D

I have done the same thing and felt the same results. Better takeoff on 4X4

I mean isn't the 4x4 version of the mada faster then the 4x2?

Rear end ratios!
The 4X4 probably has the 3.36 ratio, and the 4X2 non Big Tow has a 2.94.
The 3.36 will be quicker off the line.
This would be a good reason.

I believe the rear ratio is part of the big tow option.

Our computer does adapt for stock and not for aftermarket parts. That being the case though the aftermarket parts are generally either within the stock ranges or off one end, in which case the computer will compensate as much as possible. If the computer is sensing more air coming in etc. it will do as much as it can to adapt, so even though you won't get full benefits, you will get some. But you will need aftermarket programming to get full benefit.
Exhaust is where most loose the low end due to the lack of back pressure at lower rpms generated by the larger pipes. The power is often made up at the mid to high level RPMS. Heatsoak should not be a problem with the Titan/Armada intakes as most are cold air boxes and give you less heatsoak than stock, etc. It sounds like you have another problem as you surmised it shouldn't be and I haven't heard anyone else saying it is a problem with volant or other intakes on our vehicles like it is with other vehicles. It sounds like you are using experience with smaller rice rockets and relating it to ours, which doesn't translate often. I"d try resetting your computer with the ECU reset procedure. Hope this helps.

I have dyno'd alot of vehicles and even tested proto-types for a few. I know what heatsoak and detonation is and don't see where your ignorance of rice rockets need to be injected into this thread!

I also know a good deal on ECUs and their learning/adaptability. I agree that aftermarket parts will show the most gains with ECU tuning. I have even dealt with a few cars that need tuning from an intake. But they simply do not adjust in a good way to help with aftermarket parts.

Re-setting the ECU is not the best way and most of the time is useless.

It is getting over 100* out here and I can definately seeing heatsoak and deto being part of an aftermarket intake.


And the 4X4 was definately slower than the 4X2. The 4X4 felt heavy and higher than the 4X2.

The Volant should not cause this problem. However if you had an air leak (even a very small one) at the MAF sensor or anywhere downstream it could cause the problems. An air leak wouls cause a leaner mixture, which will cause the hesitation and pinging.


Yeah thought about that and check for air leaks and everthing was good.
It is just the heat here as it seems to be the same with the stock intake but without the pinging.

The hesitation is not as bad as maybe I or others made it out to be but maybe more noticable witht he sound of the Volant intake.

The intake is definately going back on with the exhaust.

Thanks for all the replys except for the ricer comments which I thought this board was more mature than that!

Herb

Yeah thought about that and check for air leaks and everthing was good.
It is just the heat here as it seems to be the same with the stock intake but without the pinging.

The hesitation is not as bad as maybe I or others made it out to be but maybe more noticable witht he sound of the Volant intake.

The intake is definately going back on with the exhaust.

Thanks for all the replys except for the ricer comments which I thought this board was more mature than that!

Herb
I have had the Volant on my Armada for about 30,000 miles, along with a Gibson single. Many of our days here in Texas are over 100 degrees, so heat soak is common. I have the initial timing advanced 2 degrees, have made 19 WOT dyno runs, about 50 0-60 runs and at least 25 1/4 mile runs with no pinging problems.
I had a bog off the line until I did the advance.
With the stock maps I have always used regular 87 fuel. With my more aggressive tune I use 89, but will probably retune for 91.

I have had the Volant on my Armada for about 30,000 miles, along with a Gibson single. Many of our days here in Texas are over 100 degrees, so heat soak is common. I have the initial timing advanced 2 degrees, have made 19 WOT dyno runs, about 50 0-60 runs and at least 25 1/4 mile runs with no pinging problems.
I had a bog off the line until I did the advance.
With the stock maps I have always used regular 87 fuel. With my more aggressive tune I use 89, but will probably retune for 91.


Yeah I need to look more into the timing advance. I have no problems running higher octane if needed.
Could be a bad batch of gas too.

I'll update this when the Volant and Gibson are on the truck. Thanks again for the reply.