[scr38]

I have made all my acceleration runs in hot weather, 90-100 degrees. We had a little cool front come in last night, and the temp was 68 this morning, so I made another run. My Armada has the Volant CAI, Airaid TBS, grounding kit, Gibson single and big tow. I am near sea level (about 20 ft.) and make all runs on the same section of road, in the same direction. I made this mornings run with VDC off, A/C on, shifter in third. Regular 87 fuel, 3/8 tank. I had a slight tail wind, I'm sure that helped. Here are the best previous and today's results:

--------------------------Previous--------------------------Today
0-60---------------------6.594-----------------------------6.106
1/4-------------------15.079-91.44---------------------14.69-94.2
1,000 ft-----------------12.605----------------------------12.290
1/8--------------------9.660-73.05----------------------9.517-75.53
60'-----------------------2.223------------------------------2.229

Notice that the 60' time was slightly slower, and the 1/8 was about the same. That’s because I had significant wheel spin; I haven't had any in the past. My max G's was down to .65 from .69 due to the wheel spin.
You can see that the cooler temps make a huge difference.
I am impressed that a vehicle that weighs about 5,500 lbs can run this well.

 

[92TripleBlack]

Nice times!

 

[DaveDatsun]

scr38 -
You're making me look foward to buying an Armada in the next few months! Impressive performance.
Just wondering, what was your starting line technique?

dave and xtoy - who has a manual transmission

 

[scr38]

scr38 -
You're making me look foward to buying an Armada in the next few months! Impressive performance.
Just wondering, what was your starting line technique?

dave and xtoy - who has a manual transmission

No power braking - just nail the throttle.

 

[Campfamily]

Just curious, why did you run with the AC on?

 

[scr38]

Just curious, why did you run with the AC on?

My Armada is faster with the A/C on; I have done back to back tests to confirm this. I think this is why - The ECU looks at many things to control the engine output. Electrical loads, power steering, temps,air densities, etc and A/C are all considered and adjustments are made according to the loads. When you go full throttle the A/C compressor is switched off, but I think the ECU still sees it as on because the A/C control is still on, and adjusts for this load. That is the only explaination I have for this. I do know I run quicker with the A/C on. A member of ClubTitan has also found this to be true with his Titan.

 

[Campfamily]

My Armada is faster with the A/C on; I have done back to back tests to confirm this. I think this is why - The ECU looks at many things to control the engine output. Electrical loads, power steering, temps,air densities, etc and A/C are all considered and adjustments are made according to the loads. When you go full throttle the A/C compressor is switched off, but I think the ECU still sees it as on because the A/C control is still on, and adjusts for this load. That is the only explaination I have for this. I do know I run quicker with the A/C on. A member of ClubTitan has also found this to be true with his Titan.

WOW! I would never have thought of that. So, no more turning off the A/C when I'm pulling up a long hill towing the trailer!!!!

Keith

 

[SilverQShip]

scr38 -
Your making me look forward to getting some mod's for the Q. 6.1 is amazing time for this heavy of a vehicle, do plan to mod even more? What kinda MPG are you averaging? how much $ have you spent in aftermarket parts?

 

[scr38]

scr38 -
Your making me look forward to getting some mod's for the Q. 6.1 is amazing time for this heavy of a vehicle, do plan to mod even more? What kinda MPG are you averaging? how much $ have you spent in aftermarket parts?

1. I don't have any specific other mods in mind. However, as an old hotrodder, I have a hard time leaving things alone. I will always be thinking of things I can try. If a good "black box" tuner comes out I will probably try that.
2. I drive quite a lot on the highway, always with a load of 500-600 pounds (going to trade shows). A/C is on 90% of the time, I usually set the cruise at about 73. I average a little over 16, with a best of slightly over 18.
3. I have spent about $850.00 for all my mods.

 

[Armada]

Great run, SCR38. Congrats!

 

[SilverQShip]

1. I don't have any specific other mods in mind. However, as an old hotrodder, I have a hard time leaving things alone. I will always be thinking of things I can try. If a good "black box" tuner comes out I will probably try that.
2. I drive quite a lot on the highway, always with a load of 500-600 pounds (going to trade shows). A/C is on 90% of the time, I usually set the cruise at about 73. I average a little over 16, with a best of slightly over 18.
3. I have spent about $850.00 for all my mods.

WOW, only $850.00!!! can i get the whole list of mods you got, if your truck is running 0-60 6.1s i want in. :rrg:

 

[adjmcloon]

Hey Scr38,

I read somewhere that Hypertech is coming out with a tuner for us. I had some great results with one on my old Chevy Tahoe. I think at that point I'd go with the Volant and hypertech mod. Still not sure about exhaust as I lost low end using a Corsa single exit on my Tahoe, and I don't want the exhaust to be any louder than stock if I can help it.

With all those mods (including the hypertech) it might be possible to get the best into the upper 5.x range 0-60! That's crazy talk for a vehicle of this size.

 

[scr38]

WOW, only $850.00!!! can i get the whole list of mods you got, if your truck is running 0-60 6.1s i want in. :rrg:

Not that many mods:
1. Volant CAI - $235.00
2. Airaid TBS - $100.00
3. Screen behind throttle body removed. - N/C
4. Gibson SS Single cat back exhaust system. - $475.00
5. Initial timing changed from 15 deg BTDC to 18 deg. - N/C
6. Active Tuning grounding kit. - $40.00

I have the Big Tow package, which includes the lower rear end ratio (3.36 - 2.94 W/O big tow). Stock wheels and tires at 37 PSI.

I also have the Carbotech ceramic brake pads and Crown SS braided brake lines. That has nothing to do with acceleration performance, but I do have over 23,000 miles with the original rotors, no brake problems.

 

[andy]

5. Initial timing changed from 15 deg BTDC to 18 deg. - N/C

How did you change the timing? Did it give you any knocking problems? You're doing something right running those times.

 

[scr38]

How did you change the timing? Did it give you any knocking problems? You're doing something right running those times.

You have to do it with the Consult II. I had a tech at my dealer do it for me. Here is the procedure. Many techs don't know about it.

--------------------------------------------------------------------
Warm up vehicle.
On CONSULT 2 screen choose ENGINE
After communication with Convertor will display a bunch of choices.
Press WORK SUPPORT
See more choices, press TARGET IGN TIMING
Press UP x2 for 2 degrees, correction which you should be able to see.
Press UPDATE.
Now press BACK
On the menu screen find IDLE AIR VOL LEARN.
Press, and perform to correct your idle since you just raised it 75rpm with timing advance.
-----------------------------------------------------------------------
No knocking problems. I used to have a bogging problem right off the line. The timing advance took care of that.