Dyno results for new 02-03 Cattman Y-pipe!
10-22-2003, 05:38 PM
#1
Dyno results for new 02-03 Cattman Y-pipe!
I wanted to pass along the dyno results or the new Cattman Performance Y-pipe for the 02-03 Maxima and I35.
I'd mentioned that it made more power over stock off-peak than at the maximum horsepower, and that's very much the case. Power is gained everywhere -- especially between 4000-5000rpm -- with a peak power increase of 16hp around 4400rpm. Average hp gain between 3800 and 6200rpm is 7.8 hp.
Note that we could have better dyno data in the lower rpm ranges -- No, the y-pipe did not lose power below 3800, they just didn't get the torque convertor locked up till that point. The second dyno, showing the addition of a b-pipe to the y-pipe shows that this could not possibly be accurate.
Here is the dyno comparing the stock y-pipe with the Cattman y-pipe:
And here is the one showing the Cattman y-pipe (before) with the Cattman B-pipe added (after) [Note that adding the b-pipe would not have "fixed" the low rpm issues of the Cattman y-pipe run -- this run is obviously very solid below 3800rpm.]:
It looks like slim margin, but there's actually a spot where it gains 8hp, but there are a lot of 4-5hp readings, which isn't bad at all for a b-pipe that leads into a stock muffler.
I have copies of the raw Dynapak data, and also a spreadsheet that effectively compares the before and after horsepower data, which I'll be glad to send on request (send me an email). Hope this information is useful.
And, remember, these and all the other Cattman stainless Y-pipes are available for $299 in commemoration of our 5th year anniversary -- sale ends officially Friday, 24 October (but by special request we're going to take stragglers orders Monday).
Brian C Catts
Cattman Performance
I'd mentioned that it made more power over stock off-peak than at the maximum horsepower, and that's very much the case. Power is gained everywhere -- especially between 4000-5000rpm -- with a peak power increase of 16hp around 4400rpm. Average hp gain between 3800 and 6200rpm is 7.8 hp.
Note that we could have better dyno data in the lower rpm ranges -- No, the y-pipe did not lose power below 3800, they just didn't get the torque convertor locked up till that point. The second dyno, showing the addition of a b-pipe to the y-pipe shows that this could not possibly be accurate.
Here is the dyno comparing the stock y-pipe with the Cattman y-pipe:
And here is the one showing the Cattman y-pipe (before) with the Cattman B-pipe added (after) [Note that adding the b-pipe would not have "fixed" the low rpm issues of the Cattman y-pipe run -- this run is obviously very solid below 3800rpm.]:
It looks like slim margin, but there's actually a spot where it gains 8hp, but there are a lot of 4-5hp readings, which isn't bad at all for a b-pipe that leads into a stock muffler.
I have copies of the raw Dynapak data, and also a spreadsheet that effectively compares the before and after horsepower data, which I'll be glad to send on request (send me an email). Hope this information is useful.
And, remember, these and all the other Cattman stainless Y-pipes are available for $299 in commemoration of our 5th year anniversary -- sale ends officially Friday, 24 October (but by special request we're going to take stragglers orders Monday).
Brian C Catts
Cattman Performance
10-22-2003, 05:41 PM
#2
Guest
Posts: n/a
So by the looks of this, we lose HP and TQ at lower RPM's, but have more overall throughout the powerband, correct?
10-22-2003, 06:01 PM
#4
let me just say that i am impressed. looks like a good product.
but im wondering why the torque is so low on every run (including stock, y-pipe and y/b-pipe) stock torque should be right around 220 ft/lb ( + or - a few ft/lbs)
the HP gains are awesome but the torque is strangly low to me. but it does not seem to be b/c of the cattman products.
but im wondering why the torque is so low on every run (including stock, y-pipe and y/b-pipe) stock torque should be right around 220 ft/lb ( + or - a few ft/lbs)
the HP gains are awesome but the torque is strangly low to me. but it does not seem to be b/c of the cattman products.
10-22-2003, 06:03 PM
#5
no, he said that the dyno wasnt accurate at low rpms because the torque converter didnt lock up till 3800 rpm. This dyno was on an auto tranny Max, so you cant really get good low rpm numbers cause the car will downshift, no way to override that (least that I know of). Nice to see the y-pipe givin some gains! Maybe I just found my christmas present 
10-22-2003, 07:00 PM
#9
Supporting Maxima.org Member
Join Date: May 2003
Posts: 908
Originally Posted by LithiuMax
So by the looks of this, we lose HP and TQ at lower RPM's, but have more overall throughout the powerband, correct?
Reading is your friend.
Originally Posted by Cattman
"Note that we could have better dyno data in the lower rpm ranges -- No, the y-pipe did not lose power below 3800, they just didn't get the torque convertor locked up till that point. The second dyno, showing the addition of a b-pipe to the y-pipe shows that this could not possibly be accurate."
10-22-2003, 07:00 PM
#10
Guest
Posts: n/a
man I was going to wait to get this, but after reading POLO's post and now this, im in! 
10-22-2003, 07:08 PM
#12
Senior Member
Join Date: Aug 2003
Posts: 364
I will be ordering 10/23/2003
Y pipe 299
gasket set 10
shipping to NY 25
More power to smash VTEC.......priceless !!!!
Y pipe 299
gasket set 10
shipping to NY 25
More power to smash VTEC.......priceless !!!!
10-22-2003, 07:08 PM
#13
Guest
Posts: n/a
Originally Posted by Quicksilver
Good stuff Brian. Do you have the after Oct 24th price already set? I'm paying off my computer... 
and also, how well do these work with the stock exhaust systems?? any noise?? will I pass emissions with these and stock exhaust??
10-22-2003, 07:09 PM
#14
Senior Member
Join Date: Aug 2001
Posts: 2,720
I think I've discovered my first mod (to be). Any significant change in interior decibal levels, Brian??
10-22-2003, 07:18 PM
#15
Donating Maxima.org Member
Join Date: Apr 2001
Posts: 1,085
So the excitement factor with this pipe installed could be something like this.....
10-22-2003, 07:36 PM
#16
Senior Member
Join Date: May 2002
Posts: 321
Originally Posted by MAXINXS
So the excitement factor with this pipe installed could be something like this.....
damn this sounds sweet....wonder if it will be too loud with my OBX exhaust...but i guess gotta sarcrifice abit in order to gain some performance...
10-22-2003, 09:00 PM
#17
Guest
Posts: n/a
Originally Posted by Lumbee1
Reading is your friend.Argh.. I can't afford it right now, and on top of that, I am not sure that I would like the increased decibel level with my PowerTech muffler. Maybe I would have less reasons to talk myself out of this if I had more money
10-22-2003, 10:54 PM
#18
Are you comparing to DynoJet dynos?
These are from a Dynapack dyno, which measures differently since there are no drums for the wheels to accelerate. The wheels are removed and the packs are bolted to the hubs, so there is also going to be a difference without the additional 50lbs. or so of unsprung weight.
I'd pay more attention to the DIFFERENCE between the runs rather then trying to compare them to other DynoJet runs.
I'm sure the torque would be higher if it was a DynoJet.
These are from a Dynapack dyno, which measures differently since there are no drums for the wheels to accelerate. The wheels are removed and the packs are bolted to the hubs, so there is also going to be a difference without the additional 50lbs. or so of unsprung weight.
I'd pay more attention to the DIFFERENCE between the runs rather then trying to compare them to other DynoJet runs.
I'm sure the torque would be higher if it was a DynoJet.
Originally Posted by Newman
let me just say that i am impressed. looks like a good product.
but im wondering why the torque is so low on every run (including stock, y-pipe and y/b-pipe) stock torque should be right around 220 ft/lb ( + or - a few ft/lbs)
the HP gains are awesome but the torque is strangly low to me. but it does not seem to be b/c of the cattman products.
but im wondering why the torque is so low on every run (including stock, y-pipe and y/b-pipe) stock torque should be right around 220 ft/lb ( + or - a few ft/lbs)
the HP gains are awesome but the torque is strangly low to me. but it does not seem to be b/c of the cattman products.
10-23-2003, 05:10 AM
#21
Senior Member
Join Date: Aug 2003
Posts: 364
Originally Posted by PoLo
Sounds great, I will be ordering today when Cattman opens. Hey I notice you are clear blubs in side markers, you been stopped for those. I have clear markers with stock blubs and I am too old (36) to get hassled by cops.
10-23-2003, 05:58 AM
#22
Originally Posted by Darth Vader
Sounds great, I will be ordering today when Cattman opens. Hey I notice you are clear blubs in side markers, you been stopped for those. I have clear markers with stock blubs and I am too old (36) to get hassled by cops.
i've been rather safe with this car.
back to topic, i shoudl have the WOT video and normal driving (shift at 3k rpm) video up in a few hours.
10-23-2003, 05:59 AM
#23
Originally Posted by NT2SHBBY
and also, how well do these work with the stock exhaust systems?? any noise?? will I pass emissions with these and stock exhaust??
10-23-2003, 09:17 AM
#24
Senior Member
Join Date: Aug 2001
Posts: 2,720
Wait, 225.5 whp!! Assuming the test car is a 6sp thats about 270 crank HP. Those mods are better than I realized.
Virus, thanks for your response about the noise levels; sounds like something I can live with.
Peace
Virus, thanks for your response about the noise levels; sounds like something I can live with.
Peace
10-23-2003, 10:19 AM
#26
Originally Posted by bigdo26
think I might join you guys and get one of these y-pipes. looks like it will provide some significant hp gains. its been a couple months since I last modded Max... i think its that time again
noise levels are not louder at all. it may seem louder, but that's just a dif. noise. i'm used to my greddy when it humms, but the pipe just made that hum into more of a throatier sound. manlier, and i love it. i will post 2 more vid clips as soon as the server lets me.
i also did a few runs on the Belt Parkway (all NYC folk would know this) onto the prospect, onto the BQE, into the GCP. the most noted part was when a car got in my way, and i dropped into 3rd and proceeded to pass him. since our biggest gain was in the midrange, i felt alot of it there.
again, very pleased with the pipe...thanx brian for everything. i am willing to help out anyone in the NYC area with this. if anyone wants to personally hear it, i'm also happy to meet up. that's all what the .org's about, right
10-23-2003, 10:23 AM
#27
Don't just look at the numbers, the difference between the runs is more important. This is a different kind of dyno that REMOVES the weight of the tires/wheels from the calculation, so they will be HIGHER then you'd normally see on a DynoJet dyno.
Originally Posted by F23A4
Wait, 225.5 whp!! Assuming the test car is a 6sp thats about 270 crank HP. Those mods are better than I realized.
Virus, thanks for your response about the noise levels; sounds like something I can live with.
Peace
Virus, thanks for your response about the noise levels; sounds like something I can live with.
Peace
10-23-2003, 10:32 AM
#28
Senior Member
Join Date: Aug 2003
Posts: 364
The Force is with me......
The Cattman Y-pipe has been ordered.
334.00 includes gasket set and shipping to NY.
Should get it 10/31/2003.
I have never dynoed my car, I am looking for places in my area.
The Cattman Y-pipe has been ordered.
334.00 includes gasket set and shipping to NY.
Should get it 10/31/2003.
I have never dynoed my car, I am looking for places in my area.
10-23-2003, 10:38 AM
#29
Originally Posted by Virus
I have the WSP Y and B pipes w/resonator. I'm sure there is no difference between the two brands as far as noise so I'll chime in. These have no effect whatsoever on any emission components on 2k2 and 2k3 Maxima's. In the 2k2 and 2k3's the pre-cats are located higher than the Y pipe. As far as noise: It adds a slight deep note that's almost non existant at low normal driving rpms and is not abtrusive at all. When you go wide open throttle it unleashes a fantastic deep growl.
10-23-2003, 11:18 AM
#30
Originally Posted by F23A4
Wait, 225.5 whp!! Assuming the test car is a 6sp thats about 270 crank HP. Those mods are better than I realized.
Virus, thanks for your response about the noise levels; sounds like something I can live with.
Peace
Virus, thanks for your response about the noise levels; sounds like something I can live with.
Peace
so like IceY2K1 said to you (and to me earlier in the thread) dont look at the #s specifically. look at the difference between the numbers. the ypipe adds about 5 hp and the b/ypipe combo adds about 9.
10-23-2003, 11:37 AM
#31
Originally Posted by Newman
the stock dyno is about 10-12 HP higher than a normal stock 6spd(normal being Dynojet since its the most common dyno org members use)so the 225 HP is also about 10-12 higher than it would be on a dynojet (im assuming)
so like IceY2K1 said to you (and to me earlier in the thread) dont look at the #s specifically. look at the difference between the numbers. the ypipe adds about 5 hp and the b/ypipe combo adds about 9.
That's where this mod shines NOT peak.
10-23-2003, 11:58 AM
#32
Originally Posted by VMaximus02
Have you had your emission test done of yet?
10-23-2003, 01:05 PM
#33
Originally Posted by IceY2K1
The DynaPack inflates the numbers even more then 10-12hp, since these are AUTOmatic numbers you're seeing.
True..if you're only looking at PEAK numbers, however as Cattman said, that's NOT THE WHOLE PICTURE. Everybody is only looking at PEAK to PEAK change, when REAL WORLD power increases are seen as AREA UNDER THE CURVE.
That's where this mod shines NOT peak.
True..if you're only looking at PEAK numbers, however as Cattman said, that's NOT THE WHOLE PICTURE. Everybody is only looking at PEAK to PEAK change, when REAL WORLD power increases are seen as AREA UNDER THE CURVE.
That's where this mod shines NOT peak.
10-23-2003, 01:50 PM
#34
Originally Posted by Triple8Sol
Forgive me if I missed it, but what other mods were installed on those cars you dyno'd?
At the start, there were no other mods on a bone stock 03 auto. We installed the Cattman y-pipe (first dyno), and then added the Cattman B-pipe to that (second dyno). Those are the only modifications.
Brian C Catts
Cattman Performance
10-23-2003, 01:51 PM
#35
Originally Posted by IceY2K1
The DynaPack inflates the numbers even more then 10-12hp, since these are AUTOmatic numbers you're seeing.
True..if you're only looking at PEAK numbers, however as Cattman said, that's NOT THE WHOLE PICTURE. Everybody is only looking at PEAK to PEAK change, when REAL WORLD power increases are seen as AREA UNDER THE CURVE.
That's where this mod shines NOT peak.
True..if you're only looking at PEAK numbers, however as Cattman said, that's NOT THE WHOLE PICTURE. Everybody is only looking at PEAK to PEAK change, when REAL WORLD power increases are seen as AREA UNDER THE CURVE.
That's where this mod shines NOT peak.
The correction factor that day on the Dynapack was approximately 1.07, but obviously the greatest value here is the difference between the test runs rather than comparing the absolute hp/tq figures with other cars and other testing equipment.
BCC
10-23-2003, 02:02 PM
#37
They already make them for your car and they are on sale for $299 until tomorrow.
http://www.cattman.com/
http://www.cattman.com/
10-23-2003, 02:05 PM
#38
Originally Posted by 2kprlmax
are these being made for the 2k-2k1, if so what is the price on them?
The 02/03 version is just our latest Maxima Y-pipe. We sell the following:
YG4 - ALL 1995-1998 Maximas and I30s
YG5 - 1999-2001 Maximas and I30s, with Federal emissions only
YG5-CA - 1999-2001 Maximas and I30s, with CA/NLEV emissions only
YG5A - ALL 2002-2003 Maximas and I35s
Coming soon: YG6 - All 2004 Maximas
Perhaps most importantly at the moment, ALL of the y-pipes we carry are on sale to commemorate Cattman Performance's 5th Anniversary. Marked down from $355, they are discounted to $299 until end of day Monday 27 October.
Order 8-5 mountain standard time, M-F, via 800.759.9920.
Brian C Catts
Cattman Performance
10-23-2003, 02:06 PM
#40
It's chrome alright...
Join Date: Dec 2001
Posts: 4,009
Originally Posted by 03BlkSETE
They already make them for your car and they are on sale for $299 until tomorrow.
http://www.cattman.com/
http://www.cattman.com/
