DYNOS - 2K 5SPD STOCK V. INTAKE/CATTMAN Y and DETACHED EXHAUST
#1
In the never ending quest by the 2k 5spd Tampa Maxima guys (Madmax2k 2k2demax and MaxGator) to detail the performance of the 2k 5spd, I have provided a link to recent dyno plots of my 2k 5spd (below).
One of them is stock v. Y and SI. You will see an approximate max hp gain of 12hp to the wheels for the Cattman SS Y-pipe and the Stillen Intake combined (no - I didn't test each mod individually). HP is consistently higher than stock above approximately 5000 rpm. In fact, with the mods, I reach the stock max hp at only 5200 rpms rather than 6700 redline it took for stock. Max torque does not change much BUT torque is substantially higher above 5000 through redline.
FYI, all pulls - stock and mods -were done in 3rd gear. I know some may say that exaggerates HP slightly but at least it is consistent. The stock and mods were done about 1 month and 2000 miles apart.
In addition, I have also posted a dyno done with the EXHAUST DETACHED after the catalytic converter(courtesy of Madmax2k's hard work). It shows no significant gain in hp or torque. I believe there was sufficient back-pressure since torque only dropped nominally. I take this to mean that a cat-back system may be of limited value. However, I know that 2k2demax gained approximately 8 hp when he changed his exhaust and went to lighter wheels. In short, I don't expect to find great gains from a cat-back.
http://members.nbci.com/maxgator
One of them is stock v. Y and SI. You will see an approximate max hp gain of 12hp to the wheels for the Cattman SS Y-pipe and the Stillen Intake combined (no - I didn't test each mod individually). HP is consistently higher than stock above approximately 5000 rpm. In fact, with the mods, I reach the stock max hp at only 5200 rpms rather than 6700 redline it took for stock. Max torque does not change much BUT torque is substantially higher above 5000 through redline.
FYI, all pulls - stock and mods -were done in 3rd gear. I know some may say that exaggerates HP slightly but at least it is consistent. The stock and mods were done about 1 month and 2000 miles apart.
In addition, I have also posted a dyno done with the EXHAUST DETACHED after the catalytic converter(courtesy of Madmax2k's hard work). It shows no significant gain in hp or torque. I believe there was sufficient back-pressure since torque only dropped nominally. I take this to mean that a cat-back system may be of limited value. However, I know that 2k2demax gained approximately 8 hp when he changed his exhaust and went to lighter wheels. In short, I don't expect to find great gains from a cat-back.
http://members.nbci.com/maxgator
#3
Originally posted by madmax2k
Good post John. Hopefully the community at large finds it useful. I know I do
Good post John. Hopefully the community at large finds it useful. I know I do
#4
By the way, here's the link to Larry's previous post of his dynos of Stock v. CAI and Cattman y-pipe.
https://maxima.org/forums/showthread...?threadid=5910
I've also added it to my directory with the other dynos above.
http://members.nbci.com/maxgator
Essentially, there is no substantive performance difference between the Cattman Y and the Stillen intake compared with the Cattman Y and the CAI.
Larry and I have identical 5spds and dyno'd stock on the same day. Our stock dynos are dead-on. He has (well, had on the dyno) the CAI and I have the Stillen. Difference was very small - less than 1 hp.
[Edited by Max_Gator on 11-25-2000 at 11:03 AM]
https://maxima.org/forums/showthread...?threadid=5910
I've also added it to my directory with the other dynos above.
http://members.nbci.com/maxgator
Essentially, there is no substantive performance difference between the Cattman Y and the Stillen intake compared with the Cattman Y and the CAI.
Larry and I have identical 5spds and dyno'd stock on the same day. Our stock dynos are dead-on. He has (well, had on the dyno) the CAI and I have the Stillen. Difference was very small - less than 1 hp.
[Edited by Max_Gator on 11-25-2000 at 11:03 AM]
#5
Also, for the "doubters" out there....John and I did on the road tests right after dynoing.....no difference between the 2 intakes. The cars were dead even. Ive now switched my intake back to the underhood style so I dont get the annoying creakiness from the lower intake tube.
#6
it supports the theory
Originally posted by madmax2k
Also, for the "doubters" out there....John and I did on the road tests right after dynoing.....no difference between the 2 intakes. The cars were dead even. Ive now switched my intake back to the underhood style so I dont get the annoying creakiness from the lower intake tube.
Also, for the "doubters" out there....John and I did on the road tests right after dynoing.....no difference between the 2 intakes. The cars were dead even. Ive now switched my intake back to the underhood style so I dont get the annoying creakiness from the lower intake tube.
#7
Re: it supports the theory
Originally posted by Nismo87SE
A while back the Socal 4th gen guys tested the CAI vs teh SI intake. THe verdict was the SI makes more toppend power because of a higher MAF voltage. I was thinking since the CAI is 3", maybe its hurting the air velocity from that big ID. Now I wonder with a 2.5" CAI would do, in theory it should increase the intake air velocity and midrange-highend torque.
Originally posted by madmax2k
Also, for the "doubters" out there....John and I did on the road tests right after dynoing.....no difference between the 2 intakes. The cars were dead even. Ive now switched my intake back to the underhood style so I dont get the annoying creakiness from the lower intake tube.
Also, for the "doubters" out there....John and I did on the road tests right after dynoing.....no difference between the 2 intakes. The cars were dead even. Ive now switched my intake back to the underhood style so I dont get the annoying creakiness from the lower intake tube.
#9
Yeah, I'm exploring the ECU thing. I have tried to get ahold of the people who do the PROGRAM - but have received no response. Not sure that I want to do pulleys and for now, no NO2 and no supercharger. So... that leaves very little.
Do you know if JWT makes anything for the 2k??
Do you know if JWT makes anything for the 2k??
#10
Originally posted by Max_Gator
Yeah, I'm exploring the ECU thing. I have tried to get ahold of the people who do the PROGRAM - but have received no response. Not sure that I want to do pulleys and for now, no NO2 and no supercharger. So... that leaves very little.
Do you know if JWT makes anything for the 2k??
Yeah, I'm exploring the ECU thing. I have tried to get ahold of the people who do the PROGRAM - but have received no response. Not sure that I want to do pulleys and for now, no NO2 and no supercharger. So... that leaves very little.
Do you know if JWT makes anything for the 2k??
#11
Well, the exhaust thing remains to be seen. I haven't seen any confirmation that it isn't marketing hype. Have heard that the part numbers are the same on the muffler.
Also, the dyno I did, showed an increase of 2 hp to the wheels where the exhaust was dropped after the cat. So, I guess there could be 5 hp in the exhaust somewhere. But seems like you wouldn't get that from just the muffler. If you find out anything, let me know.
Also, seems like I remember hearing some of the 4th gen guys say that the JWT didn't make a higher max hp, just provided higher hp in some parts of the band. Even so, that sounds good. I would love to have 10 more hp to the wheels at 5k RPMS!!
Also, the dyno I did, showed an increase of 2 hp to the wheels where the exhaust was dropped after the cat. So, I guess there could be 5 hp in the exhaust somewhere. But seems like you wouldn't get that from just the muffler. If you find out anything, let me know.
Also, seems like I remember hearing some of the 4th gen guys say that the JWT didn't make a higher max hp, just provided higher hp in some parts of the band. Even so, that sounds good. I would love to have 10 more hp to the wheels at 5k RPMS!!
#14
max gator, if you think Nitrous is so bad, take a look at the newest issue of super street...there is a common misconceptions about nitrous section which you might want to look at...if you do everything right you can run a 200 shot on our engine for years w/o any problem...just look at the article...it all depends on installation...don't do it yourself, bring it to the best shop you can find...i plan on putting nitrous in soon (planned on a 75 shot...might go higher now because of the article)
#15
Originally posted by MrBurner
max gator, if you think Nitrous is so bad, take a look at the newest issue of super street...there is a common misconceptions about nitrous section which you might want to look at...if you do everything right you can run a 200 shot on our engine for years w/o any problem...just look at the article...it all depends on installation...don't do it yourself, bring it to the best shop you can find...i plan on putting nitrous in soon (planned on a 75 shot...might go higher now because of the article)
max gator, if you think Nitrous is so bad, take a look at the newest issue of super street...there is a common misconceptions about nitrous section which you might want to look at...if you do everything right you can run a 200 shot on our engine for years w/o any problem...just look at the article...it all depends on installation...don't do it yourself, bring it to the best shop you can find...i plan on putting nitrous in soon (planned on a 75 shot...might go higher now because of the article)
#17
Originally posted by Y2KevSE
No way can your engine and tranny hold up that much power. Anything around 300 and you'll have to do some internal work... or <b>*BOOM*</b>.
No way can your engine and tranny hold up that much power. Anything around 300 and you'll have to do some internal work... or <b>*BOOM*</b>.
#21
Originally posted by Max_Gator
In the never ending quest by the 2k 5spd Tampa Maxima guys (Madmax2k 2k2demax and MaxGator) to detail the performance of the 2k 5spd, I have provided a link to recent dyno plots of my 2k 5spd (below).
One of them is stock v. Y and SI. You will see an approximate max hp gain of 12hp to the wheels for the Cattman SS Y-pipe and the Stillen Intake combined (no - I didn't test each mod individually). HP is consistently higher than stock above approximately 5000 rpm. In fact, with the mods, I reach the stock max hp at only 5200 rpms rather than 6700 redline it took for stock. Max torque does not change much BUT torque is substantially higher above 5000 through redline.
FYI, all pulls - stock and mods -were done in 3rd gear. I know some may say that exaggerates HP slightly but at least it is consistent. The stock and mods were done about 1 month and 2000 miles apart.
In addition, I have also posted a dyno done with the EXHAUST DETACHED after the catalytic converter(courtesy of Madmax2k's hard work). It shows no significant gain in hp or torque. I believe there was sufficient back-pressure since torque only dropped nominally. I take this to mean that a cat-back system may be of limited value. However, I know that 2k2demax gained approximately 8 hp when he changed his exhaust and went to lighter wheels. In short, I don't expect to find great gains from a cat-back.
http://members.nbci.com/maxgator
In the never ending quest by the 2k 5spd Tampa Maxima guys (Madmax2k 2k2demax and MaxGator) to detail the performance of the 2k 5spd, I have provided a link to recent dyno plots of my 2k 5spd (below).
One of them is stock v. Y and SI. You will see an approximate max hp gain of 12hp to the wheels for the Cattman SS Y-pipe and the Stillen Intake combined (no - I didn't test each mod individually). HP is consistently higher than stock above approximately 5000 rpm. In fact, with the mods, I reach the stock max hp at only 5200 rpms rather than 6700 redline it took for stock. Max torque does not change much BUT torque is substantially higher above 5000 through redline.
FYI, all pulls - stock and mods -were done in 3rd gear. I know some may say that exaggerates HP slightly but at least it is consistent. The stock and mods were done about 1 month and 2000 miles apart.
In addition, I have also posted a dyno done with the EXHAUST DETACHED after the catalytic converter(courtesy of Madmax2k's hard work). It shows no significant gain in hp or torque. I believe there was sufficient back-pressure since torque only dropped nominally. I take this to mean that a cat-back system may be of limited value. However, I know that 2k2demax gained approximately 8 hp when he changed his exhaust and went to lighter wheels. In short, I don't expect to find great gains from a cat-back.
http://members.nbci.com/maxgator
180x=192*222
180x=42624
x=236
So you're "new" modded engine would be a 236 hp engine. Right? Hope I didn't confuse everyone...I might be waaay off base.
Tony
#22
Well, the link is ALMOST 1 YEAR OLD - just like the post. So it should be no surprise that it no longer works.
Don't know that I have that plot on line anywhere. My plots are at:
DYNO PLOT: Stock(Run2) v. Y/SI(Run 5) v. Y/SI/UDP (Run 11)
DYNO PLOT: Air Fuel ratio (with all mods)
You are correct regarding what you list as hp to the crank. It is just a backwards guess from wheel hp. That is, if stock crank is 222 and wheel is 190 then driveline loss is (222-190)/222 or about 15% Just divide the wheel hp by 85% and you'll get an approximate crank hp.
Don't know that I have that plot on line anywhere. My plots are at:
DYNO PLOT: Stock(Run2) v. Y/SI(Run 5) v. Y/SI/UDP (Run 11)
DYNO PLOT: Air Fuel ratio (with all mods)
You are correct regarding what you list as hp to the crank. It is just a backwards guess from wheel hp. That is, if stock crank is 222 and wheel is 190 then driveline loss is (222-190)/222 or about 15% Just divide the wheel hp by 85% and you'll get an approximate crank hp.
#26
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Stock Dyno Graph on my 2000 Auto:
http://www.5thgenmaximas.com/russmax.../images/2kmax/
And chart:
http://www.5thgenmaximas.com/russmax...ax/2kdyno2.jpg
Here is the one when the ypipe was installed.
http://www.5thgenmaximas.com/russmax...ax/D1199-1.jpg
http://www.5thgenmaximas.com/russmax...ax/D1199-2.jpg
http://www.5thgenmaximas.com/russmax...ax/D1199-3.jpg
http://www.5thgenmaximas.com/russmax.../images/2kmax/
And chart:
http://www.5thgenmaximas.com/russmax...ax/2kdyno2.jpg
Here is the one when the ypipe was installed.
http://www.5thgenmaximas.com/russmax...ax/D1199-1.jpg
http://www.5thgenmaximas.com/russmax...ax/D1199-2.jpg
http://www.5thgenmaximas.com/russmax...ax/D1199-3.jpg
#27
I need to find out what was the difference with all of Max_Gator's mods with and without the stock muffler. What was the difference in HP that the stock mufflers robbed from him.
Does the stock muffler rob you from HP, and by how much?
Maximuss
Does the stock muffler rob you from HP, and by how much?
Maximuss
#28
Originally posted by maximuss
I need to find out what was the difference with all of Max_Gator's mods with and without the stock muffler. What was the difference in HP that the stock mufflers robbed from him.
Does the stock muffler rob you from HP, and by how much?
Maximuss
I need to find out what was the difference with all of Max_Gator's mods with and without the stock muffler. What was the difference in HP that the stock mufflers robbed from him.
Does the stock muffler rob you from HP, and by how much?
Maximuss
That's not to say there is no gain, just not substantial enough in my opinion to justify it on purely a performance basis.
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