View Poll Results: Would you be interested in a High quality polished SS Exhaust system?
I would
49
68.06%
Maybe
19
26.39%
Not really
4
5.56%
Voters: 72. You may not vote on this poll
Exhaust System Interest?
04-01-2005, 05:26 AM
#82
Senior Member
Join Date: Nov 2003
Posts: 305
Originally Posted by SSR Engineering
we could blow that price out of the water 
04-01-2005, 08:38 AM
#84
Maxima Pilot
Join Date: Oct 2001
Location: Beaverton, Oregon
Posts: 1,467
Since this is an open request for feedback, here goes mine:
The primary reason I have not installed either of the various headers out there is because they are not optimally designed, gas-flow wise: their individual downpipes are too short and collectors too small to make the power and torque that could be gotten from a set of better designed headers.
Now, it may be that space constraints just flat dont allow that to be the case, but per my rough calculations on gas flow speed at 6000 RPMs (about 1300 feet per second) and about 8.3 gas pulses per second per cylinder, a set of headers with roughly four to six inch longer down pipes (the individual pipes that come from each cylinder) along with a collector of about 1.5x the volume of the current designs - which dont do much to actually aid in the smoothing of the gas flows a true collector does by providing a symmetrical joining of the individual down pipes- would yield far more power and tq that the current designs do.
If SSR could look into these designs and calculations and come up with a header that is more optimally designed and addresses the various fitment issues with O2 sensors, etc etc, plus make a matching cat-back for a competitive price, I would bite......
The primary reason I have not installed either of the various headers out there is because they are not optimally designed, gas-flow wise: their individual downpipes are too short and collectors too small to make the power and torque that could be gotten from a set of better designed headers.
Now, it may be that space constraints just flat dont allow that to be the case, but per my rough calculations on gas flow speed at 6000 RPMs (about 1300 feet per second) and about 8.3 gas pulses per second per cylinder, a set of headers with roughly four to six inch longer down pipes (the individual pipes that come from each cylinder) along with a collector of about 1.5x the volume of the current designs - which dont do much to actually aid in the smoothing of the gas flows a true collector does by providing a symmetrical joining of the individual down pipes- would yield far more power and tq that the current designs do.
If SSR could look into these designs and calculations and come up with a header that is more optimally designed and addresses the various fitment issues with O2 sensors, etc etc, plus make a matching cat-back for a competitive price, I would bite......
04-01-2005, 08:54 AM
#85
Senior Member
Join Date: Nov 2000
Posts: 2,108
Originally Posted by Galo
Since this is an open request for feedback, here goes mine:
The primary reason I have not installed either of the various headers out there is because they are not optimally designed, gas-flow wise: their individual downpipes are too short and collectors too small to make the power and torque that could be gotten from a set of better designed headers.
Now, it may be that space constraints just flat dont allow that to be the case, but per my rough calculations on gas flow speed at 6000 RPMs (about 1300 feet per second) and about 8.3 gas pulses per second per cylinder, a set of headers with roughly four to six inch longer down pipes (the individual pipes that come from each cylinder) along with a collector of about 1.5x the volume of the current designs - which dont do much to actually aid in the smoothing of the gas flows a true collector does by providing a symmetrical joining of the individual down pipes- would yield far more power and tq that the current designs do.
If SSR could look into these designs and calculations and come up with a header that is more optimally designed and addresses the various fitment issues with O2 sensors, etc etc, plus make a matching cat-back for a competitive price, I would bite......
The primary reason I have not installed either of the various headers out there is because they are not optimally designed, gas-flow wise: their individual downpipes are too short and collectors too small to make the power and torque that could be gotten from a set of better designed headers.
Now, it may be that space constraints just flat dont allow that to be the case, but per my rough calculations on gas flow speed at 6000 RPMs (about 1300 feet per second) and about 8.3 gas pulses per second per cylinder, a set of headers with roughly four to six inch longer down pipes (the individual pipes that come from each cylinder) along with a collector of about 1.5x the volume of the current designs - which dont do much to actually aid in the smoothing of the gas flows a true collector does by providing a symmetrical joining of the individual down pipes- would yield far more power and tq that the current designs do.
If SSR could look into these designs and calculations and come up with a header that is more optimally designed and addresses the various fitment issues with O2 sensors, etc etc, plus make a matching cat-back for a competitive price, I would bite......
x1,000,000,000!
04-01-2005, 09:18 AM
#87
Senior Member
Join Date: Oct 2001
Posts: 242
What volume of the gas pulse are you using? As the gas expands it fills a volume in the pipe. We need to make sure it does not expand too much and slow the velocity down. I assusme you also do not wish to let the pulses bang into each other and cause more turbulence. So what diameter pipe are you suggesting for the headers?
04-01-2005, 09:38 AM
#88
Senior Member
Thread Starter
Join Date: Sep 2003
Posts: 437
Originally Posted by VQ30GTR
What volume of the gas pulse are you using? As the gas expands it fills a volume in the pipe. We need to make sure it does not expand too much and slow the velocity down. I assusme you also do not wish to let the pulses bang into each other and cause more turbulence. So what diameter pipe are you suggesting for the headers?
Guys listen to this link for a sound clip of our exhaust system on an Altima 3.5SE
Idle
(right click and save as)
http://ssr-engineering.com/AltimaTur...t/MVI_2041.AVI
Revving
(right click and save as)
http://ssr-engineering.com/AltimaTur...t/MVI_2042.AVI
04-01-2005, 10:09 AM
#89
Junior Member
Join Date: Feb 2004
Posts: 16
i have the tanabe hyper medalion muffler i found in a shop by my house for 75 bucks and put custom piping for 55 bucks i use 2.5" piping and the car runs great with all the mods i have it sounds like the 350z and it looks like the stock muffler. but alot of people prefer the stock look.
04-01-2005, 01:44 PM
#92
Maxima Pilot
Join Date: Oct 2001
Location: Beaverton, Oregon
Posts: 1,467
Originally Posted by VQ30GTR
What volume of the gas pulse are you using? As the gas expands it fills a volume in the pipe. We need to make sure it does not expand too much and slow the velocity down. I assusme you also do not wish to let the pulses bang into each other and cause more turbulence. So what diameter pipe are you suggesting for the headers?
Before you ask me how I get that, it's the 540ccs of combustion chamber volume x the 1.7 constant x 1.25 pulses per revolution because each cylinder on a bank fires every 270 degrees of crankshaft rotation. Do the math of 540 x 1.7 x 1.25 = 1147 ccs
In other words, the total volume of all three of the downpipes + the collector must be close to that figure of 1147 ccs for there to be optimal flow within the system -because at any given poin in time, there will be 1147 ccs of exhaust volume needing to be accomodated and flowed within th system
A header with downpipes of 1.125" diameter and lengths of 18, 20 and 22 inches for each cylinder provides the following volumes:
18" downpipes: 878 ccs
20" downpipes: 976 ccs
22" downpipes: 1073ccs
If the pipes were 1.25" ID, the same lengths would yield volumes of
18" downpipes: 1089 ccs
20" downpipes: 1210 ccs
22" downpipes: 1331 ccs
So, I would think that headers of 1.25" ID and 20" downpipes (or 20" combined downpipes + collector) would yield much better performance than the current configuration of headers out there.
I would actually love to see what the SSR guys have to say about all this as I'm just spouting theory whereas they have this down to a more realistic science.
Also, I have not personally touched any of the currently-available headers, but I'm pretty sure they dont have individual downpipes+collectors in the 18" to 20" range. In fact, if I look at Stillen's headers pictures, it appears that their total downpipe + collectors lengths are barely a foot long, so...should we have any question as to why the Stealin headers dont really do much for our Maxes?? Hell, look at their own headers for the Sentras and you'll see how much longer their downpipes are -plus it appears that its collector is a big larger as well...
Cattman's headers look much better with substantially longer, more even-length downpipes as well as larger collectors. But still, I bet that headers with four or five inch longer downpipes -if they could be fitted inside the envelope of our cars- would result in better power and a much more melodious exhaust note.
As a last note/edit, take a look at Stillen's headers for the 350z and G35 variants and compare these with the so-called headers they themselves sell for our cars and the differences in relative downpipe lengths should be obvious....this is more proof that our headers need longer downpipes/collectors...
04-01-2005, 01:46 PM
#93
Senior Member
Join Date: Oct 2002
Posts: 1,554
SSR,
though im all for variety, this really isn't something we needed very bad at this point, please stick to the mods that really will offer us something in power gains, exhausts we have a plenty
Maybe can you get back on the intake manifold project?
though im all for variety, this really isn't something we needed very bad at this point, please stick to the mods that really will offer us something in power gains, exhausts we have a plenty
Maybe can you get back on the intake manifold project?
04-01-2005, 01:51 PM
#95
Originally Posted by SSR Engineering
Guys listen to this link for a sound clip of our exhaust system on an Altima 3.5SE
04-01-2005, 02:58 PM
#96
Member
Join Date: Jul 2004
Posts: 231
the exhaust on the altima sounds great, but dont you guys think its just a little too loud?? is it just the catback on their or are there headers and y pipe installed too, im just wonderin because if we get a similiar exhaust likke that then install headers it might just get too loud, i like that way mike's mossy exhaust sound with his hs headers
04-01-2005, 03:54 PM
#97
Senior Member
Join Date: Nov 2000
Posts: 2,108
Originally Posted by Galo
Due to latent heat and pressure -and I admit to be using some very old formulas from my college days- I'm using an volume pulse = 1.7x a combustion chamber size halfway between the 3 liter cars and the 3.5 liter cars or roughly 540 ccs, meaning, a system where, per bank, the three downpipes plus collector need to accomodate approximately 1147 ccs of exhaust volume at any given time..
Before you ask me how I get that, it's the 540ccs of combustion chamber volume x the 1.7 constant x 1.25 pulses per revolution because each cylinder on a bank fires every 270 degrees of crankshaft rotation. Do the math of 540 x 1.7 x 1.25 = 1147 ccs
In other words, the total volume of all three of the downpipes + the collector must be close to that figure of 1147 ccs for there to be optimal flow within the system -because at any given poin in time, there will be 1147 ccs of exhaust volume needing to be accomodated and flowed within th system
A header with downpipes of 1.125" diameter and lengths of 18, 20 and 22 inches for each cylinder provides the following volumes:
18" downpipes: 878 ccs
20" downpipes: 976 ccs
22" downpipes: 1073ccs
If the pipes were 1.25" ID, the same lengths would yield volumes of
18" downpipes: 1089 ccs
20" downpipes: 1210 ccs
22" downpipes: 1331 ccs
So, I would think that headers of 1.25" ID and 20" downpipes (or 20" combined downpipes + collector) would yield much better performance than the current configuration of headers out there.
I would actually love to see what the SSR guys have to say about all this as I'm just spouting theory whereas they have this down to a more realistic science.
Also, I have not personally touched any of the currently-available headers, but I'm pretty sure they dont have individual downpipes+collectors in the 18" to 20" range. In fact, if I look at Stillen's headers pictures, it appears that their total downpipe + collectors lengths are barely a foot long, so...should we have any question as to why the Stealin headers dont really do much for our Maxes?? Hell, look at their own headers for the Sentras and you'll see how much longer their downpipes are -plus it appears that its collector is a big larger as well...
Cattman's headers look much better with substantially longer, more even-length downpipes as well as larger collectors. But still, I bet that headers with four or five inch longer downpipes -if they could be fitted inside the envelope of our cars- would result in better power and a much more melodious exhaust note.
As a last note/edit, take a look at Stillen's headers for the 350z and G35 variants and compare these with the so-called headers they themselves sell for our cars and the differences in relative downpipe lengths should be obvious....this is more proof that our headers need longer downpipes/collectors...
Before you ask me how I get that, it's the 540ccs of combustion chamber volume x the 1.7 constant x 1.25 pulses per revolution because each cylinder on a bank fires every 270 degrees of crankshaft rotation. Do the math of 540 x 1.7 x 1.25 = 1147 ccs
In other words, the total volume of all three of the downpipes + the collector must be close to that figure of 1147 ccs for there to be optimal flow within the system -because at any given poin in time, there will be 1147 ccs of exhaust volume needing to be accomodated and flowed within th system
A header with downpipes of 1.125" diameter and lengths of 18, 20 and 22 inches for each cylinder provides the following volumes:
18" downpipes: 878 ccs
20" downpipes: 976 ccs
22" downpipes: 1073ccs
If the pipes were 1.25" ID, the same lengths would yield volumes of
18" downpipes: 1089 ccs
20" downpipes: 1210 ccs
22" downpipes: 1331 ccs
So, I would think that headers of 1.25" ID and 20" downpipes (or 20" combined downpipes + collector) would yield much better performance than the current configuration of headers out there.
I would actually love to see what the SSR guys have to say about all this as I'm just spouting theory whereas they have this down to a more realistic science.
Also, I have not personally touched any of the currently-available headers, but I'm pretty sure they dont have individual downpipes+collectors in the 18" to 20" range. In fact, if I look at Stillen's headers pictures, it appears that their total downpipe + collectors lengths are barely a foot long, so...should we have any question as to why the Stealin headers dont really do much for our Maxes?? Hell, look at their own headers for the Sentras and you'll see how much longer their downpipes are -plus it appears that its collector is a big larger as well...
Cattman's headers look much better with substantially longer, more even-length downpipes as well as larger collectors. But still, I bet that headers with four or five inch longer downpipes -if they could be fitted inside the envelope of our cars- would result in better power and a much more melodious exhaust note.
As a last note/edit, take a look at Stillen's headers for the 350z and G35 variants and compare these with the so-called headers they themselves sell for our cars and the differences in relative downpipe lengths should be obvious....this is more proof that our headers need longer downpipes/collectors...
04-02-2005, 08:49 AM
#99
Senior Member
Thread Starter
Join Date: Sep 2003
Posts: 437
Originally Posted by MaxSE-R
the exhaust on the altima sounds great, but dont you guys think its just a little too loud?? is it just the catback on their or are there headers and y pipe installed too, im just wonderin because if we get a similiar exhaust likke that then install headers it might just get too loud, i like that way mike's mossy exhaust sound with his hs headers
04-03-2005, 11:10 AM
#101
Supporting Maxima.org Member
Join Date: Oct 2004
Location: Limbo, NE
Posts: 57
Performance
Aesthetic value is important but not 1st.
1. SS
2. Performance
3. Weight
4. Price
5. Looks
In that order; no compromises.
IMO, I think the whole system should be R&Ded together at the same time.
This way the entire fitment is not problematic and the most HP/TQ can be squeezed out from IM-Headers-CC-CatB. Besides, for SSR, it would mean more quailty products=more loyal customers=more $$=more R&D and the cycle continues.
Just my 2cents.
1. SS
2. Performance
3. Weight
4. Price
5. Looks
In that order; no compromises.
IMO, I think the whole system should be R&Ded together at the same time.
This way the entire fitment is not problematic and the most HP/TQ can be squeezed out from IM-Headers-CC-CatB. Besides, for SSR, it would mean more quailty products=more loyal customers=more $$=more R&D and the cycle continues.
Just my 2cents.
04-04-2005, 04:10 PM
#102
Originally Posted by BlackBIRDVQ
9000 exhausts sold ? Man those have to be the nastiest sounding Maximas out there. I see more Greddy exhausts on Maximas than some cheap **** CM puts out. I don't think we even have 9000 members here on the forum, and if we did- not everyone has their exhaust. CM products suck, the only good thing they sell is the resonated test pipe. And once again I don't drive a Pontiac GTP or whatever they sell that has 4 exhaust tips.
and here I thought nissan sold quad tips on their 2k4 and 2k5 maxima's...silly me. I dont like the look of the 6th gen really and do not really think I want quad tips, but the 10 hp gain of the dual exhaust and the look is really quite nice and brings it more of an upscale look than the old coffee can does.
04-06-2005, 02:15 PM
#107
Originally Posted by Tac_M
SSR , I know it's a little OT but, you have a manifold for 350z/g35 why can't you modify the TB part of it so it can be used on Atimas and Maximas? WE need it BAD!!!
04-20-2005, 12:47 PM
#112
Member
Join Date: Aug 2003
Posts: 297
I wonder how long this will take if SSR intends to go with this, since i was considering the frankencar rear section, maybe even the full cattback. But knowing the SSR may be cheaper makes it even more appealing. BUT so far i like the frankencars classy look over the rest of the competition and including it's sound. Though i was interested in removing it's resonator and putting a straight pipe in it's place, though i appreciate it's quiet sound i wouldn't mind something which will stand out without popping and and annoying people like the greddy. no offense to anyone who has the greddy on there 5th gens ;p but i heard it up close and couldn't buy it for my car.
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