3.5L ebay headers, first impressions
06-23-2005, 07:59 AM
#41
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Join Date: Mar 2005
Posts: 136
[QUOTE=luxbond] now if this was a car i planned on racing- or a car that i felt was worthy of the intention of breaking records in its genre i would have bought a better set. i've got the money, i do own a 02 maxima after all. it's just my priorities aren't in making a four door, mid luxury vehicle into a speed machine. [QUOTE]
I am the same way. My speed machine is a 89 Porsche 944S2 that I take to the track. I like my Maxima as nice highway hauler, because they are fast stock and highly stable at speeds in excess of 100 MPH. And they look clean.
At least you like the new sound the headers were cheap enough, just think of it as you spent the money to get a nice engine sound.
I am the same way. My speed machine is a 89 Porsche 944S2 that I take to the track. I like my Maxima as nice highway hauler, because they are fast stock and highly stable at speeds in excess of 100 MPH. And they look clean.
At least you like the new sound the headers were cheap enough, just think of it as you spent the money to get a nice engine sound.
06-23-2005, 08:04 AM
#42
Originally Posted by remembermorriso
I am the same way. My speed machine is a 89 Porsche 944S2 that I take to the track. I like my Maxima as nice highway hauler, because they are fast stock and highly stable at speeds in excess of 100 MPH. And they look clean.
At least you like the new sound the headers were cheap enough, just think of it as you spent the money to get a nice engine sound.
At least you like the new sound the headers were cheap enough, just think of it as you spent the money to get a nice engine sound.
06-23-2005, 11:26 AM
#43
Originally Posted by luxbond
'Comparing Dynapack readings to Dynojet readings is still a little questionable, since more driveline losses will be seen on the dynapack. On the other hand, those losses are really there, and the Dynapack reading is what is really reaching the ground. If we are trying to compare engines, this isn't the best method, but if you wanted to compare actual performance results- this is the way to go.'
uhh, what are you talking about ?
06-23-2005, 12:56 PM
#44
Isn't that a girl's name?
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Originally Posted by E55AMG2
uhh, what are you talking about ?
now i've got another choice to make. do i keep these headers on and avoid the work in swapping the stocks back, keep my engine light on, and lose power- or do i put in some sweat equity and bring it back to its former self and lose the growl? sorry for the run on.
06-23-2005, 01:05 PM
#45
Hm, by the looks of it you gained nor lost anything with these headers in the power department only gained some sound. I'd say if you can get the money back or don't like the sound take them off, otherwise I would suggest to keep them on as it takes too much effort to return back to original... My opinion... BTW, why is your light on?
06-23-2005, 02:35 PM
#47
Originally Posted by luxbond
someone mentioned comparing dynojet numbers- which seem to be the standard on this board- to my dynapack numbers. really i meant to say that there really isnt much of a difference, its only 1-2hp variation between the two readouts. the dynapack removes the rollers/tires/wheels from the equation- as it bolts directly to the hub.
06-23-2005, 02:36 PM
#48
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Join Date: Mar 2005
Posts: 342
Well didn't you say that you felt more power via the butt dyno? If so then who cares what the Dyno numbers are. This is all very unscientific anyway. There are many factors involved. The only real test is to take the same car on the same day and do a comparison with and without headers on the dyno. Until then your numbers mean nothing. I believe you also posted that you have a stock exhaust from the cat back. Try putting on a cat back and you may seen a big increase - maybe the stock exhaust is too restrictive. Good luck. Also, can you post the graph?
06-23-2005, 02:41 PM
#49
Originally Posted by traderfjp
Well didn't you say that you felt more power via the butt dyno? If so then who cares what the Dyno numbers are. This is all very unscientific anyway. There are many factors involved. The only real test is to take the same car on the same day and do a comparison with and without headers on the dyno. Until then your numbers mean nothing. I believe you also posted that you have a stock exhaust from the cat back. Try putting on a cat back and you may seen a big increase - maybe the stock exhaust is too restrictive. Good luck. Also, can you post the graph?
Im guessing youve never heard of SAE corrections.....the only variable is the brand of machine (unless its an eddy current machine like a mustang, then its the operator too). This is why all dynos should be done on a dynojet 248C...its extremely consistent from machine to machine. Also, there is no operator error....just push the damn button and go
06-23-2005, 03:50 PM
#50
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E55 so what do you think about the numbers this guy is posting with the Ebay headers? I've heard of SAE corrections. A key element to producing comparable dyno charts on a global basis is the Correction Factor, SAE Standard J1349, which applies the following weather station data--atmospheric pressure 29.23, air temperature 77 degrees Fahrenheit and humidity 0 percent--to all tests. These exact figures allow apples-to-apples comparison of runs from different cars, different facilities, etc. So graphs with SAE-corrected power were made to this standard. The dyno in question must have a weather station and the proper software in order to generate SAE-corrected data.
There is a good article on Dyno cheating, etc. Here goes: http://www.turbomagazine.com/tech/0402tur_punkdyno/
There is a good article on Dyno cheating, etc. Here goes: http://www.turbomagazine.com/tech/0402tur_punkdyno/
06-23-2005, 04:24 PM
#51
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Join Date: Apr 2005
Posts: 61
Do you have a curve to compare. While you had no increase at peak, I would belive that the hp may have increased more at lower rpms where the total air flow was less. That total area under the curve is as important as you spend more engine time over an rpm range than just at peak.
+ as I have heard from anecdotal references it is difficult to get good gains out of the max/alti 3.5 over 4000rpm due to the intake manifold restrictions.
I'd be happy with +10hp from 3000-4000 as that is the rpm range i'm most likely to be at when I decide I need to put my foot down.
+ as I have heard from anecdotal references it is difficult to get good gains out of the max/alti 3.5 over 4000rpm due to the intake manifold restrictions.
I'd be happy with +10hp from 3000-4000 as that is the rpm range i'm most likely to be at when I decide I need to put my foot down.
06-23-2005, 04:26 PM
#52
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Join Date: Jun 2005
Posts: 157
the IM is def restrictive, but IIRC JIME on his 02 added HS headers and a bpipe and gained 1 sec and 10 MPH in the 1/4 mile..VERY IMPRESSIVE. the $tillen knockoff suck, and his dyno proves it. my 02 with y and intake did 218WHP/228TQ
Originally Posted by Mr_Red
+ as I have heard from anecdotal references it is difficult to get good gains out of the max/alti 3.5 over 4000rpm due to the intake manifold restrictions.
06-23-2005, 08:46 PM
#53
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Join Date: Mar 2005
Posts: 342
It looks like a intake, cat back and Y-pipe will get you about 10-12 HP over stock while headers will get you about 30 hp over stock. This is a crude observation since all the dynos might not have been SAE corrected or conducted in the same manner. It looks like headers are worth the bucks. Too bad the intall is so difficult and expensive. But for around 600.00 you can get a NX setup and really get a huge HP jumps. The headers are not going to do much unless you're accelerating hard so maybe the NX is the way to go. But I read where it can kill your engine too.
2003 SE 6spd stock 206.52WHP/222TQ - Dynojet
02 Maxima 216.5 HP and 221.3 - Cattman Y-Pipe, PowerTech Exhaust, Berk Intake
2003 Black SE - 237.5 HP 237.5 Torque SAE Corrected Hotshot Headers, Greddy Evo Catback, Advanced Timing, Definitive Motorsports UDP, 2nd Gen Maximum Tuning VB, Maxspeed Springs, 9 inch K&N cone filter
2003 SE 6spd stock 206.52WHP/222TQ - Dynojet
02 Maxima 216.5 HP and 221.3 - Cattman Y-Pipe, PowerTech Exhaust, Berk Intake
2003 Black SE - 237.5 HP 237.5 Torque SAE Corrected Hotshot Headers, Greddy Evo Catback, Advanced Timing, Definitive Motorsports UDP, 2nd Gen Maximum Tuning VB, Maxspeed Springs, 9 inch K&N cone filter
06-23-2005, 11:01 PM
#54
Originally Posted by traderfjp
E55 so what do you think about the numbers this guy is posting with the Ebay headers? I've heard of SAE corrections. A key element to producing comparable dyno charts on a global basis is the Correction Factor, SAE Standard J1349, which applies the following weather station data--atmospheric pressure 29.23, air temperature 77 degrees Fahrenheit and humidity 0 percent--to all tests. These exact figures allow apples-to-apples comparison of runs from different cars, different facilities, etc. So graphs with SAE-corrected power were made to this standard. The dyno in question must have a weather station and the proper software in order to generate SAE-corrected data.
There is a good article on Dyno cheating, etc. Here goes: http://www.turbomagazine.com/tech/0402tur_punkdyno/
There is a good article on Dyno cheating, etc. Here goes: http://www.turbomagazine.com/tech/0402tur_punkdyno/
His numbers are stock....however w/o the weight of wheels and tires on an actual roller im thinking he may have even lost power.
06-23-2005, 11:05 PM
#55
Originally Posted by traderfjp
It looks like a intake, cat back and Y-pipe will get you about 10-12 HP over stock while headers will get you about 30 hp over stock. This is a crude observation since all the dynos might not have been SAE corrected or conducted in the same manner. It looks like headers are worth the bucks. Too bad the intall is so difficult and expensive. But for around 600.00 you can get a NX setup and really get a huge HP jumps. The headers are not going to do much unless you're accelerating hard so maybe the NX is the way to go. But I read where it can kill your engine too.
2003 SE 6spd stock 206.52WHP/222TQ - Dynojet
02 Maxima 216.5 HP and 221.3 - Cattman Y-Pipe, PowerTech Exhaust, Berk Intake
2003 Black SE - 237.5 HP 237.5 Torque SAE Corrected Hotshot Headers, Greddy Evo Catback, Advanced Timing, Definitive Motorsports UDP, 2nd Gen Maximum Tuning VB, Maxspeed Springs, 9 inch K&N cone filter
2003 SE 6spd stock 206.52WHP/222TQ - Dynojet
02 Maxima 216.5 HP and 221.3 - Cattman Y-Pipe, PowerTech Exhaust, Berk Intake
2003 Black SE - 237.5 HP 237.5 Torque SAE Corrected Hotshot Headers, Greddy Evo Catback, Advanced Timing, Definitive Motorsports UDP, 2nd Gen Maximum Tuning VB, Maxspeed Springs, 9 inch K&N cone filter
06-24-2005, 12:09 AM
#56
impressive #'s e55....i thought manny had the highest 5.5 gen auto dyno....well probably not the highest...but the highest for the mods he has is what i mean....
you have I/H/UDP...Manny has I/H/17* pretty comparable mods
you have I/H/UDP...Manny has I/H/17* pretty comparable mods
06-24-2005, 12:12 AM
#57
Originally Posted by steven88
impressive #'s e55....i thought manny had the highest 5.5 gen auto dyno....well probably not the highest...but the highest for the mods he has is what i mean....
you have I/H/UDP...Manny has I/H/17* pretty comparable mods
you have I/H/UDP...Manny has I/H/17* pretty comparable mods
UDP and 17* timing do NOTHING on the dyno...we have the same mods. Im on Stock wheels and 235/50 17....which means i have a couple more HP waiting in reserve from the .5" oversized tires (stock = 26.1, mine are 26.6)
06-24-2005, 01:55 AM
#59
Isn't that a girl's name?
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dyno plot, kind of a crappy readout not as accurate as mine direct from the dynapack computer. the shop uses these to compare to other cars in their dyno database.
http://www.cardomain.com/ride/687468/4
http://www.cardomain.com/ride/687468/4
06-26-2005, 10:57 AM
#60
For clarification, I knew I did not have the highest auto dyno. I knew there was a fellow with 235-237 .. and now I know E55 has 239 ... All I want to do is open my high end up a bit more without doing anymore exhaust work.
And we all know peak #'s = ish, it's all about the area under the curve.
Cheers.
And we all know peak #'s = ish, it's all about the area under the curve.
Cheers.
then I will tune ... 
07-24-2005, 08:07 PM
#69
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Originally Posted by 99 SE-L
Ok if iam an Automatic what kind of 1/4 will i have and will my accleration increase greatly - Hotshot headers/Fc Intake/Fc bpipe/catmann ypipe
07-24-2005, 08:22 PM
#70
Originally Posted by 99 SE-L
Ok if iam an Automatic what kind of 1/4 will i have and will my accleration increase greatly - Hotshot headers/Fc Intake/Fc bpipe/catmann ypipe
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