Cattman 3" catback
08-05-2009, 04:39 PM
#363
08-05-2009, 04:55 PM
#365
Brians taking order for the next batch! the sooner you call the sooner he can get it started! ive been waiting for dynos to really see the differences between 2.5 and 3.
08-06-2009, 02:55 PM
#371
^ Yeah, I was going to say, a test-pipe shouldn't throw an CEL.
May I also add, it is pretty cool seening a round 2 back-order rally. Stay persistent my friends, and don't be shocked if it takes up to half a year to get serious interest! Ask myself, The Law or maxurlife for some rallying pointers
May I also add, it is pretty cool seening a round 2 back-order rally. Stay persistent my friends, and don't be shocked if it takes up to half a year to get serious interest! Ask myself, The Law or maxurlife for some rallying pointers
08-06-2009, 03:02 PM
#372
^ Yeah, I was going to say, a test-pipe shouldn't throw an CEL.
May I also add, it is pretty cool seening a round 2 back-order rally. Stay persistent my friends, and don't be shocked if it takes up to half a year to get serious interest! Ask myself, The Law or maxurlife for some rallying pointers
May I also add, it is pretty cool seening a round 2 back-order rally. Stay persistent my friends, and don't be shocked if it takes up to half a year to get serious interest! Ask myself, The Law or maxurlife for some rallying pointers
08-06-2009, 04:02 PM
#374
08-06-2009, 06:13 PM
#376
As soon as I get a pulley installed, I think I'll tune and dyno. I have to find a proper DJ248 around here in Arizona. All I know is that driving, my midrange has definitely increased. Yes, the only way to prove this is via dyno, but feel wise is all i have for now.
P.S. - It's so good to see all this interest! Thanks again Brian, you're the man!
P.S. - It's so good to see all this interest! Thanks again Brian, you're the man!
08-06-2009, 06:29 PM
#377
08-06-2009, 11:43 PM
#378
Senior Member
Join Date: Jun 2005
Location: Philadelphia, PA
Posts: 2,898
As soon as I get a pulley installed, I think I'll tune and dyno. I have to find a proper DJ248 around here in Arizona. All I know is that driving, my midrange has definitely increased. Yes, the only way to prove this is via dyno, but feel wise is all i have for now.
P.S. - It's so good to see all this interest! Thanks again Brian, you're the man!
P.S. - It's so good to see all this interest! Thanks again Brian, you're the man!
08-07-2009, 03:33 AM
#379
Not a bad idea. Of course, I never took a base time before I installed the exhaust. It feels as if I am shifting in quicker intervals in WOT. I don't WOT all too much though. I'll just be patient and wait for the funds for the pulley and tune.
How are the 2nd orders coming along?
How are the 2nd orders coming along?
08-07-2009, 04:28 AM
#380
Not a bad idea. Of course, I never took a base time before I installed the exhaust. It feels as if I am shifting in quicker intervals in WOT. I don't WOT all too much though. I'll just be patient and wait for the funds for the pulley and tune.
How are the 2nd orders coming along?
How are the 2nd orders coming along?
08-07-2009, 08:41 AM
#382
08-07-2009, 12:52 PM
#384
Remove stock exhaust replace with Cattman 3". No tuning. No computer reset. Same grade Gas from the same station. about 6 Days of driving, some hwy some City. See sig for mods:
Baseline Taken 31Jul09 553P 83F 49%Hum uncorrected. 210 WHP 220 Tq
Restest Taken 06Aug09 702P 90F 32%Hum uncorrected 214 WHP 220 Tq
Now, here's the thing. these numbers were posted in the 6K rpm range. in the 3-4K range there was a loss, most likely due to backpressure loss.
In lieu of the numbers above - the max responds very smooth and aggressively under all throttle conditions in all rpm ranges. this morning I was rolling and pretty good in first or second. Clutch was out. I mashed the throttle to get out the way and actually chirped the tires. That has never happened unless I'm working the clutch. So I'm not too sure that dyno run is accurate. It just doesn't feel true.
The tech did say that the warmer temp and the warmth of engine is probably bringing it way down..."Heat Soak" is what he called it.
Well that's my story Take it for what it's worth. Would I buy this system again. Honestly - Yes. The sound is exactly what I want. My vehicle response is far better than OEM. I also want to go FI in the future.
I do plan on getting another dyno at another local shop just to see how the numbers change. If they do.
question - Does anyone know of a website or method to calculate the power loss or gain due to weather differences?
08-07-2009, 01:07 PM
#386
It should have been but, alas - There was no tuning involved. So, here are the conditions:
Remove stock exhaust replace with Cattman 3". No tuning. No computer reset. Same grade Gas from the same station. about 6 Days of driving, some hwy some City. See sig for mods:
Baseline Taken 31Jul09 553P 83F 49%Hum uncorrected. 210 WHP 220 Tq
Restest Taken 06Aug09 702P 90F 32%Hum uncorrected 214 WHP 220 Tq
Now, here's the thing. these numbers were posted in the 6K rpm range. in the 3-4K range there was a loss, most likely due to backpressure loss.
In lieu of the numbers above - the max responds very smooth and aggressively under all throttle conditions in all rpm ranges. this morning I was rolling and pretty good in first or second. Clutch was out. I mashed the throttle to get out the way and actually chirped the tires. That has never happened unless I'm working the clutch. So I'm not too sure that dyno run is accurate. It just doesn't feel true.
The tech did say that the warmer temp and the warmth of engine is probably bringing it way down..."Heat Soak" is what he called it.
Well that's my story Take it for what it's worth. Would I buy this system again. Honestly - Yes. The sound is exactly what I want. My vehicle response is far better than OEM. I also want to go FI in the future.
I do plan on getting another dyno at another local shop just to see how the numbers change. If they do.
question - Does anyone know of a website or method to calculate the power loss or gain due to weather differences?
Remove stock exhaust replace with Cattman 3". No tuning. No computer reset. Same grade Gas from the same station. about 6 Days of driving, some hwy some City. See sig for mods:
Baseline Taken 31Jul09 553P 83F 49%Hum uncorrected. 210 WHP 220 Tq
Restest Taken 06Aug09 702P 90F 32%Hum uncorrected 214 WHP 220 Tq
Now, here's the thing. these numbers were posted in the 6K rpm range. in the 3-4K range there was a loss, most likely due to backpressure loss.
In lieu of the numbers above - the max responds very smooth and aggressively under all throttle conditions in all rpm ranges. this morning I was rolling and pretty good in first or second. Clutch was out. I mashed the throttle to get out the way and actually chirped the tires. That has never happened unless I'm working the clutch. So I'm not too sure that dyno run is accurate. It just doesn't feel true.
The tech did say that the warmer temp and the warmth of engine is probably bringing it way down..."Heat Soak" is what he called it.
Well that's my story Take it for what it's worth. Would I buy this system again. Honestly - Yes. The sound is exactly what I want. My vehicle response is far better than OEM. I also want to go FI in the future.
I do plan on getting another dyno at another local shop just to see how the numbers change. If they do.
question - Does anyone know of a website or method to calculate the power loss or gain due to weather differences?
08-07-2009, 01:49 PM
#387
08-07-2009, 06:24 PM
#388
Senior Member
Join Date: Jun 2005
Location: Philadelphia, PA
Posts: 2,898
It should have been but, alas - There was no tuning involved. So, here are the conditions:
Remove stock exhaust replace with Cattman 3". No tuning. No computer reset. Same grade Gas from the same station. about 6 Days of driving, some hwy some City. See sig for mods:
Baseline Taken 31Jul09 553P 83F 49%Hum uncorrected. 210 WHP 220 Tq
Restest Taken 06Aug09 702P 90F 32%Hum uncorrected 214 WHP 220 Tq
Now, here's the thing. these numbers were posted in the 6K rpm range. in the 3-4K range there was a loss, most likely due to backpressure loss.
In lieu of the numbers above - the max responds very smooth and aggressively under all throttle conditions in all rpm ranges. this morning I was rolling and pretty good in first or second. Clutch was out. I mashed the throttle to get out the way and actually chirped the tires. That has never happened unless I'm working the clutch. So I'm not too sure that dyno run is accurate. It just doesn't feel true.
The tech did say that the warmer temp and the warmth of engine is probably bringing it way down..."Heat Soak" is what he called it.
Well that's my story Take it for what it's worth. Would I buy this system again. Honestly - Yes. The sound is exactly what I want. My vehicle response is far better than OEM. I also want to go FI in the future.
I do plan on getting another dyno at another local shop just to see how the numbers change. If they do.
question - Does anyone know of a website or method to calculate the power loss or gain due to weather differences?
Remove stock exhaust replace with Cattman 3". No tuning. No computer reset. Same grade Gas from the same station. about 6 Days of driving, some hwy some City. See sig for mods:
Baseline Taken 31Jul09 553P 83F 49%Hum uncorrected. 210 WHP 220 Tq
Restest Taken 06Aug09 702P 90F 32%Hum uncorrected 214 WHP 220 Tq
Now, here's the thing. these numbers were posted in the 6K rpm range. in the 3-4K range there was a loss, most likely due to backpressure loss.
In lieu of the numbers above - the max responds very smooth and aggressively under all throttle conditions in all rpm ranges. this morning I was rolling and pretty good in first or second. Clutch was out. I mashed the throttle to get out the way and actually chirped the tires. That has never happened unless I'm working the clutch. So I'm not too sure that dyno run is accurate. It just doesn't feel true.
The tech did say that the warmer temp and the warmth of engine is probably bringing it way down..."Heat Soak" is what he called it.
Well that's my story Take it for what it's worth. Would I buy this system again. Honestly - Yes. The sound is exactly what I want. My vehicle response is far better than OEM. I also want to go FI in the future.
I do plan on getting another dyno at another local shop just to see how the numbers change. If they do.
question - Does anyone know of a website or method to calculate the power loss or gain due to weather differences?
way more than 4.. maybe its the fact that i have headers/y-pipe
Last edited by wyche89; 08-07-2009 at 06:27 PM.
08-07-2009, 11:01 PM
#389
your sig didnt come up in that post.. what are ur mods? and yeah, heat soak is an issue, but that little bit of a difference in temp shouldnt matter that much... and i think your system is making more than 4 horsepower.. there was a loss around 3-4k? my butt dyno felt a nice increase thoughout the powerband way more than 4.. maybe its the fact that i have headers/y-pipe
way more than 4.. maybe its the fact that i have headers/y-pipeMy butt says the same thing....ok so I was driving around tonight and the break loose occurs at about 5K in first gear, more often than not and near but not fully WOT. I agree with you 110%...Mods are only WAI (Stillen) Exhaust and grounding kit.
I know it's creating more than 4hp....I'm sure it is - how else do you break loose from accleration w/out fondling throttle? I'm a little irritated; but not at manufacturing - I'm just not too sure about the local shops...Ya know???
08-07-2009, 11:03 PM
#390
08-07-2009, 11:35 PM
#391
Don't worry about what you peak at! Did you gain big numbers in midrange range? Get headers and you'll really wake the beast! I'm sure anxious to see how much more whp/wtq some of the header equipped Maximas are gonna make. The FI crowd will see the best results in the area of quicker spoolups due to the lower back pressure when exiting the exhaust ports!
08-07-2009, 11:46 PM
#392
08-10-2009, 03:25 PM
#394
What were the corrected numbers? The correction logarithms in the dyno software that account for the three "weather" variables - temp, humidity and atmospheric pressure - aren't perfect and they vary between dyno machine companies, but better than dead reckoning. Temp is the #1 factor of the three, but unfortunately a lot of dyno shops don't measure or look up the humidity. Did the same technician do the run each time and were you on the same tank, or at least brand/grade, of gas? These factors are actually quite important.
Brian
Brian
08-12-2009, 03:42 PM
#397
Currently buying all new rubber hangers.
If anyone wants the part numbers from Courtesy Nissan, they're:
20650PA
20651M (2)
20650 PB
EDIT: Found out I can use hose clamps for free! No more rattle of any kind, woo hoo!
If anyone wants the part numbers from Courtesy Nissan, they're:
20650PA
20651M (2)
20650 PB
EDIT: Found out I can use hose clamps for free! No more rattle of any kind, woo hoo!
Last edited by MIK3; 08-12-2009 at 05:11 PM.
08-12-2009, 06:38 PM
#398
Y hanger: 20650-2Y200, $7.20 each at Courtesy
B after resonator: 20650-0L700, $7.20 each at Courtesy
Right side of muffler, front most: 20650-70A10, $7.68 each at Courtesy
Other two on muffler: 20650-50A00, $7.68 each at Courtesy
08-13-2009, 12:43 AM
#400