Re-dyno'd Paul CAI and 01 Catback, Battery Disconnected First WOW

[NewMexicoCobra]

A few days ago, I posted my results of several dyno runs of Paul's Air Intake and 01 Catback in separate stages (baseline, add air intake, add 01 catback).

http://www.svtperformance.com/forums/showthread.php?postid=200625#post200625

I wrote that I had not disconnected the battery but had driven the car hard for a week before dynos #3 and #5. The results were crummy, so I decided to disconnect the battery (15 minutes) a few days ago, drive the car hard and then re-dyno.

Now we have decent results but unfortunately, not by stages.

Run#2 is my baseline - silencer removed with K&N 0945 filter, all else stock.
Run#3 added Paul’s High Performance air intake (sock on), all else stock.
Run#5 changed the exhaust to a stock 01 catback, keeping Paul’s intake.
Run#7 same as run#5 but battery disconnected first.

Max Numbers:
Run#2 – 378.0 HP, 383.0 TQ
Run#3 – 385.7 HP, 382.3 TQ
Run#5 – 387.4 HP, 377.3 TQ
Run#7 - 396.0 HP, 385.4 TQ

Between Run#2 and Run#7, max HP increased by 18.0; max TQ increased by 2.4 (no more lost low-mid TQ). More important, average HP increased by 7.3; average TQ increased by 7.1 A good across the board increase above 3800 RPM and very little difference below 3800 RPM . AF real nice with an average of 11.7

After all this work and dynos, it appears there is an advantage to Paul's Intake and the 01 Catback together but I do not know which part added or subtracted to the numbers. As I said before, car sounds great and now it feels great!

I will post my copy and paste chart which will be a little jumbled but still legible. It will show gains and losses by 100 RPM.

 

[NewMexicoCobra]

Chart#5.

B/4 = Dyno#2 no silencer, K&N 0945, 03 Catback; After = Dyno#7 with 01 Catback and Paul's Air Intake. Battery disconnected before Dyno#7.

------B/4--After--Diff--B/4-After--Diff
RPM---HP-------------TORQUE
2700 190.1 188.7 -1.4 369.8 367.1 -2.7
2800 198.8 199.3 0.5 372.8 373.8 1.0
2900 207.3 208.7 1.4 375.4 377.9 2.5
3000 215.9 216.9 1.0 378.0 379.8 1.8
3100 223.3 224.3 1.0 378.4 380.0 1.6
3200 231.9 233.5 1.6 380.6 383.3 2.7
3300 238.2 241.3 3.1 379.1 384.0 4.9
3400 246.6 247.0 0.4 381.0 381.5 0.5
3500 254.2 254.1 -0.1 381.4 381.2 -0.2
3600 261.9 261.4 -0.5 382.1 381.4 -0.7
3700 269.1 269.2 0.1 382.0 382.1 0.1
3800 275.5 277.0 1.5 380.8 382.8 2.0
3900 283.1 285.4 2.3 381.2 384.3 3.1
4000 291.6 293.1 1.5 382.9 384.9 2.0
4100 297.5 300.3 2.8 381.2 384.7 3.5
4200 305.2 307.0 1.8 381.7 383.9 2.2
4300 311.5 315.1 3.6 380.5 384.9 4.4
4400 316.2 322.1 5.9 377.5 384.5 7.0
4500 323.1 328.0 4.9 377.1 382.8 5.7
4600 328.2 334.5 6.3 374.7 381.9 7.2
4700 331.3 338.8 7.5 370.2 378.6 8.4
4800 336.2 344.0 7.8 367.9 376.4 8.5
4900 340.8 348.5 7.7 365.3 373.6 8.3
5000 345.8 352.8 7.0 363.2 370.6 7.4
5100 348.0 358.4 10.4 358.4 369.1 10.7
5200 356.3 363.9 7.6 359.8 367.6 7.8
5300 360.2 371.3 11.1 356.9 367.9 11.0
5400 363.9 377.4 13.5 353.9 367.0 13.1
5500 367.9 381.4 13.5 351.3 364.2 12.9
5600 372.2 386.0 13.8 349.1 362.0 12.9
5700 374.1 389.2 15.1 344.7 358.7 14.0
5800 374.3 391.9 17.6 338.9 354.9 16.0
5900 377.9 393.9 16.0 336.4 350.7 14.3
6000 377.5 393.1 15.6 330.5 344.1 13.6
6100 375.7 392.7 17.0 323.5 338.1 14.6
6200 372.8 390.3 17.5 315.8 330.6 14.8
6300 371.8 392.7 20.9 310.0 327.4 17.4
6400 370.7 390.6 19.9 304.2 320.5 16.3
Average:
...... 310.2 317.5 7.3 362.6 369.7 7.1
Max:
...... 378.0 396.0 18.0 383.0 385.4 2.4

 

[NewMexicoCobra]

My Dyno Chart:

 

[NetworkingGuru]

Congrats man, great numbers for you mods :beer:

 

[03DOHC]

That's more like it!

 

[Poison_S]

Does everyone disconnect their battery after installing mods to get the car to *adapt* to the new setup?

Does it make that much of a difference?

 

[ALLNTRL]

Those results sound more like what I was expecting. Congrats! :thumbsup:

 

[NetworkingGuru]

Originally posted by Poison_S
Does everyone disconnect their battery after installing mods to get the car to *adapt* to the new setup?

Does it make that much of a difference?

I didn't. I don't THINK I am losing HP anywhere, but you never know...

 

[stan03]

Dyno Graph Post

I couldn't read the a/f ratios on that post.My car needs more fuel at 5,000rpm's a/f was 13.1 by this guys sniffer which I don't believe was very accurate.At 6,000 it showed 12.5.
JDM is redoing my chip to try and solve this problem.
I'll try to post this graph.

 

[gud2goe]

i'm with poison, what does removing the battery cable
accomplish?

 

[Cobra-R]

Originally posted by gud2goe
i'm with poison, what does removing the battery cable
accomplish?

The computer learns as you drive your car, if you drive nice it will lean the fuel mixture, take timing out ect to maximize fuel economy and minimize emissions. By disconnecting the battery, you clear out the memory of the computer and put it back to the original factory settings.
In my Lighning it was always worth about 1/10 th in the quarter mile disconnecting the battery. Try it both ways and see if you get the same results.

Brian

ps. you have to disconnect it and give it time to drain the computer of residual power. Let it sit a good 15 or so minutes with the lights turned on and the battery unhooked.

 

[NewMexicoCobra]

Chart#4.

The ONLY difference here between the two runs is that I disconnected the battery 5 days before Dyno#7, same new parts on car. Disconnecting the battery does make a difference. Why this is so, I leave to others.

B/4 = Dyno#5 with 01 Catback and Paul's Air Intake; After = Dyno#7 with 01 Catback and Paul's Air Intake. Dyno#5 and Dyno#7 a week apart and 7 degrees warmer for Dyno#7. SAE corrected.


------B/4--After--Diff--B/4-After--Diff
RPM---HP-------------TORQUE
2700 186.4 188.7 2.3 362.7 367.1 4.4
2800 194.7 199.3 4.6 365.2 373.8 8.6
2900 202.9 208.7 5.8 367.4 377.9 10.5
3000 210.9 216.9 6.0 369.2 379.8 10.6
3100 218.1 224.3 6.2 369.5 380.0 10.5
3200 226.0 233.5 7.5 370.9 383.3 12.4
3300 234.4 241.3 6.9 373.1 384.0 10.9
3400 241.1 247.0 5.9 372.4 381.5 9.1
3500 247.4 254.1 6.7 371.3 381.2 9.9
3600 255.6 261.4 5.8 373.0 381.4 8.4
3700 264.3 269.2 4.9 375.2 382.1 6.9
3800 271.8 277.0 5.2 375.6 382.8 7.2
3900 277.8 285.4 7.6 374.1 384.3 10.2
4000 285.7 293.1 7.4 375.1 384.9 9.8
4100 291.5 300.3 8.8 373.3 384.7 11.4
4200 301.7 307.0 5.3 377.3 383.9 6.6
4300 308.8 315.1 6.3 377.2 384.9 7.7
4400 313.5 322.1 8.6 374.2 384.5 10.3
4500 320.0 328.0 8.0 373.4 382.8 9.4
4600 326.1 334.5 8.4 372.3 381.9 9.6
4700 331.4 338.8 7.4 370.4 378.6 8.2
4800 331.5 344.0 12.5 362.7 376.4 13.7
4900 337.5 348.5 11.0 361.8 373.6 11.8
5000 345.0 352.8 7.8 362.4 370.6 8.2
5100 350.5 358.4 7.9 361.0 369.1 8.1
5200 357.3 363.9 6.6 360.9 367.6 6.7
5300 362.7 371.3 8.6 359.4 367.9 8.5
5400 367.6 377.4 9.8 357.5 367.0 9.5
5500 370.1 381.4 11.3 353.4 364.2 10.8
5600 375.6 386.0 10.4 352.2 362.0 9.8
5700 379.2 389.2 10.0 349.4 358.7 9.3
5800 383.0 391.9 8.9 346.9 354.9 8.0
5900 385.1 393.9 8.8 342.8 350.7 7.9
6000 386.1 393.1 7.0 338.0 344.1 6.1
6100 385.5 392.7 7.2 331.9 338.1 6.2
6200 384.4 390.3 5.9 325.7 330.6 4.9
6300 381.1 392.7 11.6 317.7 327.4 9.7
6400 385.4 390.6 5.2 316.3 320.5 4.2
Average:
...... 309.9 317.5 7.5 360.9 369.7 8.8
Max:
...... 387.4 396.0 8.6 377.3 385.4 8.1

 

[Cobra'03]

Originally posted by NetworkingGuru
I didn't. I don't THINK I am losing HP anywhere, but you never know...

I do not think you are - the car has an adaptive system. Disconnecting the batt only speeds up the process a bit. It is not like a human brain where it is almost impossible to undo life experiences - this is a a machine.

 

[DaveSVT03]

NMCobra,

How much sound difference did you get? I have the option to put an 01 cat back on my 03 and can't decide if it's worth the effort. Thanks.

 

[NewMexicoCobra]

Originally posted by DaveSVT03
NMCobra,

How much sound difference did you get? I have the option to put an 01 cat back on my 03 and can't decide if it's worth the effort. Thanks.

01 catback sounds great. Just right. This should have been stock on the 03's. It has the muscle car sound without being obnoxious or too loud.

Please check my dyno results in detail - putting in the 9" K&N along with the 01 Catback gave me great sound and more power across the board. Be aware this is my car and may not give others the same results.

If you have an opportunity to put on the 01 Catback, go ahead but do yourself a favor (and everyone else on this site) and dyno your stock car BEFORE & AFTER you add the 01. In this way you can see if the additions are really worth it. Also, just don't read the max numbers - pay attention to the results per 100 RPM to make sure you have improved things or not according to your requirements. For example, do you want more street power or want more high end for 1/4 mile fun?

There are several threads now on this site debating on how good or bad the very expensive 3" exhaust is. All could be resolved by a simple before and after dyno test and taking the time to thoroughly look at the results. The shop I go to, charges $65 for 2 runs. Money well spent as most additions cost a lot more.

Oh yes, before you dyno, don't forget to disconnect the battery after you add any new part.