Is this a record? haha... step inside please..
05-25-2004, 03:03 PM
#41
You'd better find one in a junkyard, since it ONLY comes as ONE piece, ie manifold/power valve/VIAS box/etc. and costs ~$375 new from DAVEB.
Originally Posted by spirilis
OUCH!!! Man I hope that's not what's wrong with mine
Speaking of which, I guess the only option for those who have broken VIAS rods is to remove it or buy a whole new manifold?
Speaking of which, I guess the only option for those who have broken VIAS rods is to remove it or buy a whole new manifold?
05-25-2004, 03:16 PM
#42
Is it possible for you to send me the RunViewer files to IceY2K1@maxima.org?
I need to compare your broken VIAS dyno to one I'm hoping to get soon.
I need to compare your broken VIAS dyno to one I'm hoping to get soon.
Originally Posted by mad2kmax
My mods are shown by my sig on the first post...
Place Racing CAI, Cattman Y-pipe, random tech high flow cat, Cattman full cat-back exhaust... that's it as far as performance
Place Racing CAI, Cattman Y-pipe, random tech high flow cat, Cattman full cat-back exhaust... that's it as far as performance
05-25-2004, 03:21 PM
#43
Originally Posted by IceY2K1
Is it possible for you to send me the RunViewer files to IceY2K1@maxima.org?
I need to compare your broken VIAS dyno to one I'm hoping to get soon.
I need to compare your broken VIAS dyno to one I'm hoping to get soon.
05-25-2004, 03:26 PM
#45
Senior Member
Join Date: Nov 2003
Posts: 1,860
Ummm... Maybe I am confused, but I would like to see the dyno of a properly working VAIS superimposed over those gains. With the system functioning correctly shouldent you have the low-end torque of the before dyno, AND the high RPM HP of the After dyno?
Afterall, this is what the whole point of the VAIS is!
Afterall, this is what the whole point of the VAIS is!
05-25-2004, 03:36 PM
#46
Originally Posted by NewLoveI30
Ummm... Maybe I am confused, but I would like to see the dyno of a properly working VAIS superimposed over those gains.
With the system functioning correctly shouldent you have the low-end torque of the before dyno, AND the high RPM HP of the After dyno?
Afterall, this is what the whole point of the VAIS is!
Afterall, this is what the whole point of the VAIS is!
05-25-2004, 03:46 PM
#47
Originally Posted by SR20DEN
Well thats why we're here. We want to get some more feedback from others as to what they have made. However when these other numbers arrive we need to see a mod list for each vehicle. That includes you Nathan.
05-25-2004, 03:58 PM
#49
Originally Posted by IceY2K1
You'd better find one in a junkyard, since it ONLY comes as ONE piece, ie manifold/power valve/VIAS box/etc. and costs ~$375 new from DAVEB.
05-25-2004, 04:34 PM
#55
Alright. So, plan of attack.
1. Verify if my VIAS rod works properly. How do I take it out with the manifold installed in the vehicle? Remove the VIAS box, then remove the 2 screws and cover on the other side and it should pull out? (I tried pulling it out when I had just the VIAS box off, but it wouldn't budge beyond a certain point)
So the goal here is to verify that the VIAS rod isn't snapped/broken. If it is, I will either remove it altogether, or have to buy a new manifold eventually. I need low-end torque, so the latter would be preferable.
If it's not broken, then...
2. Verify that the VIAS does indeed work under no load. If it does, see if it works under load, using a stopwatch as the timer.
If the VIAS works without any load, but doesn't seem to work under load, then assume there's a vacuum issue? in which case, I either go the easy route and buy a new manifold, or start toying with the vacuum setup somehow...
1. Verify if my VIAS rod works properly. How do I take it out with the manifold installed in the vehicle? Remove the VIAS box, then remove the 2 screws and cover on the other side and it should pull out? (I tried pulling it out when I had just the VIAS box off, but it wouldn't budge beyond a certain point)
So the goal here is to verify that the VIAS rod isn't snapped/broken. If it is, I will either remove it altogether, or have to buy a new manifold eventually. I need low-end torque, so the latter would be preferable.
If it's not broken, then...
2. Verify that the VIAS does indeed work under no load. If it does, see if it works under load, using a stopwatch as the timer.
If the VIAS works without any load, but doesn't seem to work under load, then assume there's a vacuum issue? in which case, I either go the easy route and buy a new manifold, or start toying with the vacuum setup somehow...
05-25-2004, 05:00 PM
#57
Originally Posted by spirilis
Alright. So, plan of attack.
1. Verify if my VIAS rod works properly. How do I take it out with the manifold installed in the vehicle? Remove the VIAS box, then remove the 2 screws and cover on the other side and it should pull out? (I tried pulling it out when I had just the VIAS box off, but it wouldn't budge beyond a certain point)
So the goal here is to verify that the VIAS rod isn't snapped/broken. If it is, I will either remove it altogether, or have to buy a new manifold eventually. I need low-end torque, so the latter would be preferable.
1. Verify if my VIAS rod works properly. How do I take it out with the manifold installed in the vehicle? Remove the VIAS box, then remove the 2 screws and cover on the other side and it should pull out? (I tried pulling it out when I had just the VIAS box off, but it wouldn't budge beyond a certain point)
So the goal here is to verify that the VIAS rod isn't snapped/broken. If it is, I will either remove it altogether, or have to buy a new manifold eventually. I need low-end torque, so the latter would be preferable.
I lucked out and chose the ONLY way it can come out withOUT noticing the other side(drivers' side hole is too small). I also had the IM not installed, which means I didn't have to worry about all the crap in the way on the passenger side. You're going to have to wait for SR to explain what does/doesn't need moved.
If it's not broken, then...
2. Verify that the VIAS does indeed work under no load. If it does, see if it works under load, using a stopwatch as the timer.
If the VIAS works without any load, but doesn't seem to work under load, then assume there's a vacuum issue? in which case, I either go the easy route and buy a new manifold, or start toying with the vacuum setup somehow...
2. Verify that the VIAS does indeed work under no load. If it does, see if it works under load, using a stopwatch as the timer.
If the VIAS works without any load, but doesn't seem to work under load, then assume there's a vacuum issue? in which case, I either go the easy route and buy a new manifold, or start toying with the vacuum setup somehow...
05-25-2004, 06:37 PM
#62
nice to see a vq35de maxima putting down 350z numbers.... finally disproves the theory that they are completely different engines.
as for me.... my VIAS is broken also... confirmed with my whopping 160 whp/188 tq dyno
as for me.... my VIAS is broken also... confirmed with my whopping 160 whp/188 tq dyno
05-25-2004, 06:45 PM
#63
Looking at the poor, fragile design of this thing yesterday, it became obvious that most of the VAIS's are probably broken. Most people, however, probably will never notice. Unless your a member of the org.
05-25-2004, 08:22 PM
#65
Originally Posted by HitManSE
One of the most interesting threads as of late 
Keep up the good work guys.
05-26-2004, 03:14 AM
#66
Senior Member
Join Date: Jan 2001
Posts: 1,816
wow this is interesting stuff..
but ok, shouldn't this be some kind of recall? shouldn't nissan north america be made aware of their crappy VIAS design? Couldn't the metal shavings be sucked into the combustion chambers and foul up the valves and wear the internals... couldn't a piece of plastic be sucked in and completely blow a piston?
I dunno sounds pretty unsavory to me =P
It's a good thing this thread came up. Larry was about to sell his car
but ok, shouldn't this be some kind of recall? shouldn't nissan north america be made aware of their crappy VIAS design? Couldn't the metal shavings be sucked into the combustion chambers and foul up the valves and wear the internals... couldn't a piece of plastic be sucked in and completely blow a piston?
I dunno sounds pretty unsavory to me =P
It's a good thing this thread came up. Larry was about to sell his car
05-26-2004, 04:10 AM
#67
Moderator who thinks he is better than us with his I30
iTrader: (8)
Join Date: May 2002
Posts: 9,335
I think I can easily remove the butterfly valves from my MEVI.....wonder if it would produce results like these. The way the valves open I can see how they restrict alot of air flow. Since we now know that the DE-K manifold works in a similar way to to the MEVI, I don't see how this would not work for me as well. Any thoughts SR?
05-26-2004, 04:25 AM
#68
Originally Posted by I30tMikeD
I think I can easily remove the butterfly valves from my MEVI.....wonder if it would produce results like these. The way the valves open I can see how they restrict alot of air flow. Since we now know that the DE-K manifold works in a similar way to to the MEVI, I don't see how this would not work for me as well. Any thoughts SR?
05-26-2004, 05:34 AM
#71
Hmm, OK, so looking at IceY2K1's pics -- http://www.cardomain.com/memberpage/419735/12
Which part of the VIAS power valve actually "breaks"? Is it something internal to the center of the rod (I think I see a metal rod poking out on the passenger side part of the rod)?
It looks like the VIAS power valve is one big contiguous plastic piece, but with a hole in the center for the axle rod (how does the axle rod ensure the plastic body rotates with it? or is this the core problem?), and a "key" end that fits into the actuator collar.
Which part of the VIAS power valve actually "breaks"? Is it something internal to the center of the rod (I think I see a metal rod poking out on the passenger side part of the rod)?
It looks like the VIAS power valve is one big contiguous plastic piece, but with a hole in the center for the axle rod (how does the axle rod ensure the plastic body rotates with it? or is this the core problem?), and a "key" end that fits into the actuator collar.
... I guess I'll have to 
and see. Hey Spirillis... we should try to hook up since you just the road in Hangover.
05-26-2004, 06:06 AM
#73
Senior Member
Join Date: Aug 2001
Posts: 956
Originally Posted by SR20DEN
Now all we need to do is remove his restricter plate, do the TB coolant bypass, add cattman headers, get a TS ECU with a 7200+ rev limit and I will do more work on his manifold. I don't see any reason why we can't get 220+ fwhp out of this engine.
Does anyone have a link that explains/shows the pros and cons of SR20DEN's throttle body coolant bypass?
A world of innocence, ruled by the power of corruption
SHIFT_woosh
05-26-2004, 07:01 AM
#74
Supporting Maxima.org Member
Join Date: Sep 2000
Posts: 2,038
Great work guys! You went way farther than I did to figure out how that thing works!!
I have a couple of recent dynos (before headers) in raw data - just let me know where to send them. What is amazing about mad2kmax's peak numbers is that they are the same as mine - and he's an auto! Our mods are about the same except that I have the stock muffler - not clear if he does.
I have plotted a recent run on run viewer for comparison and there's some interesting stuff going on there.
Prior to the vias mod, his hp numbers are about the same as mine below about 4700 rpms. After the vias mod, they are about 10 hp or so across the board lower BUT beginning at 4800, his hp numbers are better and he hits 200 hp 3-400 rpm sooner!
As for TQ, on his, it is down across the board substantially before 5000 but after 5000 it is identical to mine almost.
What the dynos on mad2kmax (ironic name since the the original madmax2k is a fellow tampa area resident and the current [to my knowledge] 2k/2k1 NA drag king with a 14.38 {damn that .01 - although I trapped higher}) reaffirm issomething I tried but did not dyno . . . tying open the power valve to see what happens at lower rpms.
My butt dyno said big power/tq loss below and no difference up top - so I never pursued that any further. It appears that my butt dyno may have been correct (remember I left the whole assembly in there).
The downside problem with mad2kmax's numbers is the substantial tq and hp losses below 5000. That's going to make the car slower because there's no way you make up that loss with just the high rpms. Now, if we are talking about a 3rd gear roll from 80 mph - it is a monster.
The way it stands now, I'm not certain it is a favorable trade-off BUT it looks like someone is working on that!!
I have a couple of recent dynos (before headers) in raw data - just let me know where to send them. What is amazing about mad2kmax's peak numbers is that they are the same as mine - and he's an auto! Our mods are about the same except that I have the stock muffler - not clear if he does.
I have plotted a recent run on run viewer for comparison and there's some interesting stuff going on there.
Prior to the vias mod, his hp numbers are about the same as mine below about 4700 rpms. After the vias mod, they are about 10 hp or so across the board lower BUT beginning at 4800, his hp numbers are better and he hits 200 hp 3-400 rpm sooner!
As for TQ, on his, it is down across the board substantially before 5000 but after 5000 it is identical to mine almost.
What the dynos on mad2kmax (ironic name since the the original madmax2k is a fellow tampa area resident and the current [to my knowledge] 2k/2k1 NA drag king with a 14.38 {damn that .01 - although I trapped higher}) reaffirm issomething I tried but did not dyno . . . tying open the power valve to see what happens at lower rpms.
My butt dyno said big power/tq loss below and no difference up top - so I never pursued that any further. It appears that my butt dyno may have been correct (remember I left the whole assembly in there).
The downside problem with mad2kmax's numbers is the substantial tq and hp losses below 5000. That's going to make the car slower because there's no way you make up that loss with just the high rpms. Now, if we are talking about a 3rd gear roll from 80 mph - it is a monster.
The way it stands now, I'm not certain it is a favorable trade-off BUT it looks like someone is working on that!!
05-26-2004, 07:08 AM
#75
He's got a manual.
Can you send those files to IceY2K1@maxima.org PLEASE?
Also, wait until the TechnoSquare ECU with 7100rpm limiter comes out SOON. Then you'll be able to make up that torque loss.
Can you send those files to IceY2K1@maxima.org PLEASE?
Also, wait until the TechnoSquare ECU with 7100rpm limiter comes out SOON. Then you'll be able to make up that torque loss.
Originally Posted by Max_Gator
Great work guys! You went way farther than I did to figure out how that thing works!!
I have a couple of recent dynos (before headers) in raw data - just let me know where to send them. What is amazing about mad2kmax's peak numbers is that they are the same as mine - and he's an auto! Our mods are about the same except that I have the stock muffler - not clear if he does.
I have plotted a recent run on run viewer for comparison and there's some interesting stuff going on there.
Prior to the vias mod, his hp numbers are about the same as mine below about 4700 rpms. After the vias mod, they are about 10 hp or so across the board lower BUT beginning at 4800, his hp numbers are better and he hits 200 hp 3-400 rpm sooner!
As for TQ, on his, it is down across the board substantially before 5000 but after 5000 it is identical to mine almost.
What the dynos on mad2kmax (ironic name since the the original madmax2k is a fellow tampa area resident and the current [to my knowledge] 2k/2k1 NA drag king with a 14.38 {damn that .01 - although I trapped higher}) reaffirm issomething I tried but did not dyno . . . tying open the power valve to see what happens at lower rpms.
My butt dyno said big power/tq loss below and no difference up top - so I never pursued that any further. It appears that my butt dyno may have been correct (remember I left the whole assembly in there).
The downside problem with mad2kmax's numbers is the substantial tq and hp losses below 5000. That's going to make the car slower because there's no way you make up that loss with just the high rpms. Now, if we are talking about a 3rd gear roll from 80 mph - it is a monster.
The way it stands now, I'm not certain it is a favorable trade-off BUT it looks like someone is working on that!!
I have a couple of recent dynos (before headers) in raw data - just let me know where to send them. What is amazing about mad2kmax's peak numbers is that they are the same as mine - and he's an auto! Our mods are about the same except that I have the stock muffler - not clear if he does.
I have plotted a recent run on run viewer for comparison and there's some interesting stuff going on there.
Prior to the vias mod, his hp numbers are about the same as mine below about 4700 rpms. After the vias mod, they are about 10 hp or so across the board lower BUT beginning at 4800, his hp numbers are better and he hits 200 hp 3-400 rpm sooner!
As for TQ, on his, it is down across the board substantially before 5000 but after 5000 it is identical to mine almost.
What the dynos on mad2kmax (ironic name since the the original madmax2k is a fellow tampa area resident and the current [to my knowledge] 2k/2k1 NA drag king with a 14.38 {damn that .01 - although I trapped higher}) reaffirm issomething I tried but did not dyno . . . tying open the power valve to see what happens at lower rpms.
My butt dyno said big power/tq loss below and no difference up top - so I never pursued that any further. It appears that my butt dyno may have been correct (remember I left the whole assembly in there).
The downside problem with mad2kmax's numbers is the substantial tq and hp losses below 5000. That's going to make the car slower because there's no way you make up that loss with just the high rpms. Now, if we are talking about a 3rd gear roll from 80 mph - it is a monster.
The way it stands now, I'm not certain it is a favorable trade-off BUT it looks like someone is working on that!!
05-26-2004, 07:11 AM
#76
That's what I think is VERY important here.
Since SR said metal on metal, I'm thinking the metal collar to L-rod piece.
If so, then maybe all you'd need to find/change is the VIAS box end withOUT having to remove the Power Valve.
Since SR said metal on metal, I'm thinking the metal collar to L-rod piece.
If so, then maybe all you'd need to find/change is the VIAS box end withOUT having to remove the Power Valve.
Originally Posted by spirilis
Hmm, OK, so looking at IceY2K1's pics -- http://www.cardomain.com/memberpage/419735/12
Which part of the VIAS power valve actually "breaks"? Is it something internal to the center of the rod (I think I see a metal rod poking out on the passenger side part of the rod)?
It looks like the VIAS power valve is one big contiguous plastic piece, but with a hole in the center for the axle rod (how does the axle rod ensure the plastic body rotates with it? or is this the core problem?), and a "key" end that fits into the actuator collar.
Which part of the VIAS power valve actually "breaks"? Is it something internal to the center of the rod (I think I see a metal rod poking out on the passenger side part of the rod)?
It looks like the VIAS power valve is one big contiguous plastic piece, but with a hole in the center for the axle rod (how does the axle rod ensure the plastic body rotates with it? or is this the core problem?), and a "key" end that fits into the actuator collar.
05-26-2004, 07:28 AM
#77
Also send the run files to mhwilliams@pinevilledsl.net please.
And yeah, mad2kmax has a 5 speed. And, he just told me that he cleaned his dirty **** K&N filter and removed the resitrictor plate. He claims the car feels a little faster now. I predict he will hit 210+ on his next dyno attempt after we do a few more tweaks to his car.
And yeah, mad2kmax has a 5 speed. And, he just told me that he cleaned his dirty **** K&N filter and removed the resitrictor plate. He claims the car feels a little faster now. I predict he will hit 210+ on his next dyno attempt after we do a few more tweaks to his car.
05-26-2004, 07:29 AM
#78
Supporting Maxima.org Member
Join Date: Sep 2000
Posts: 2,038
Originally Posted by IceY2K1
He's got a manual.
Can you send those files to IceY2K1@maxima.org PLEASE?
Also, wait until the TechnoSquare ECU with 7100rpm limiter comes out SOON. Then you'll be able to make up that torque loss.
Can you send those files to IceY2K1@maxima.org PLEASE?
Also, wait until the TechnoSquare ECU with 7100rpm limiter comes out SOON. Then you'll be able to make up that torque loss.
Oops read the wrong sig.
He's basically got the same mods as I do (I have a udp which gave no gain on the dyno) and he may have cattman's muffler - at least that I had for the dyno. These are pretty good comparisons.
05-26-2004, 07:30 AM
#79
I agree.
He has a full Cattman catback.
He has a full Cattman catback.
Originally Posted by Max_Gator
Your email address says it is not accepting emails.
Oops read the wrong sig.
He's basically got the same mods as I do (I have a udp which gave no gain on the dyno) and he may have cattman's muffler - at least that I had for the dyno. These are pretty good comparisons.
Oops read the wrong sig.
He's basically got the same mods as I do (I have a udp which gave no gain on the dyno) and he may have cattman's muffler - at least that I had for the dyno. These are pretty good comparisons.
05-26-2004, 07:34 AM
#80
Supporting Maxima.org Member
Join Date: Sep 2000
Posts: 2,038
Originally Posted by mad2kmax
Looking at the poor, fragile design of this thing yesterday, it became obvious that most of the VAIS's are probably broken. Most people, however, probably will never notice. Unless your a member of the org.
For a while, I didn't even know mine was broken - it took a run on the highway against another max to confirm it and poor track times. And that's with a 25 hp loss or so at redline.