OMG, the JBWeld VIAS fix rocks!!!!!
03-12-2005, 05:48 AM
#1
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OMG, the JBWeld VIAS fix rocks!!!!!
I did the JBWeld VIAS fix yesterday. My car feels like a new car, it pulls hard after 5k rpm now and the engine seems to be a little more responsive and smooth at all engine RPMs.
Here is a good writeup I saw on how to do this:
http://www.cardomain.com/memberpage/763858/5
Passing and merging on the freeway is effortless now. I had such a bad powerdrop off after 5k that I usually used 4th gear rather than 3rd as a passing gear. I saw no reason to take it to the redline because there was less power there. The butt dyno tells me I gained more than 30hp. I prolly gained (or recovered) 1-2 sec. in the quarter mile.
If you haven't done this do it! It only took me about 30min and $3.99 to do. I had a hardon to get a 5.5gen or a 6th gen, but now don't see much of a reason to. I drove a stock 5 speed 3.5 Altima yesterday and it didn't feel any faster than my 00 Max with the VIAS fix, intake, and exhaust. Maybe a little more torque on the low end for the Altima, but didn't feel any faster.
Here is a good writeup I saw on how to do this:
http://www.cardomain.com/memberpage/763858/5
Passing and merging on the freeway is effortless now. I had such a bad powerdrop off after 5k that I usually used 4th gear rather than 3rd as a passing gear. I saw no reason to take it to the redline because there was less power there. The butt dyno tells me I gained more than 30hp. I prolly gained (or recovered) 1-2 sec. in the quarter mile.
If you haven't done this do it! It only took me about 30min and $3.99 to do. I had a hardon to get a 5.5gen or a 6th gen, but now don't see much of a reason to. I drove a stock 5 speed 3.5 Altima yesterday and it didn't feel any faster than my 00 Max with the VIAS fix, intake, and exhaust. Maybe a little more torque on the low end for the Altima, but didn't feel any faster.
03-12-2005, 06:44 AM
#4
i have 32k miles on my maxima 5spd, can i still fiddle around with that and get some extra hp??? i believe that could help cause nissan does make hp outta magic... haha. where did that spring pop out of on the last pic of your car domain foobaca??
03-12-2005, 07:00 AM
#5
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Originally Posted by 2kVQboodah
i have 32k miles on my maxima 5spd, can i still fiddle around with that and get some extra hp??? i believe that could help cause nissan does make hp outta magic... haha. where did that spring pop out of on the last pic of your car domain foobaca??
03-12-2005, 07:02 AM
#6
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Originally Posted by harmbone2k2
More than 30HP??? C'mon man, are you sure? Take it to the dyno and let us know for sure.
03-12-2005, 07:16 AM
#7
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Originally Posted by 2kVQboodah
i have 32k miles on my maxima 5spd, can i still fiddle around with that and get some extra hp??? i believe that could help cause nissan does make hp outta magic... haha. where did that spring pop out of on the last pic of your car domain foobaca??
There's a few dynos on this thread:
http://forums.maxima.org/showthread....2&page=1&pp=30
SR20DEN dyno'ed it before and after:
before: whp 177.54 trq: 196.85
after: whp: 201.8 trq: 186.0
Not sure why the torque would be lower so much lower with the vias working. but notice how torque takes a noisedive after 4.7k rpm with the non-functional vias. The HP with a non-functional vias peaks also at about 4.7k rpm.
24hp at the wheels is good for ~30hp at the crank.
03-12-2005, 07:30 AM
#10
Glad you approve!
On another interesting note: I received a spare intake manifold from another org member who was parting out a blown engine, right... Anyway, I swapped the VIAS control box from it to mine. Its metal cup was unbroken! Anyway, it's been about 4 months driving on this thing, and the cup is STILL not broken. Weird, maybe some of them were defective and some weren't?
The only difference here is that my power valve rod is shortened by a tiny bit, along with the spring being shortened to reduce tension (that was done for my original box's JB weld fix, which did break)...
Maybe that's the key? Shorten the spring and rod a little to reduce tension on the metal cup?
03-12-2005, 08:00 AM
#14
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Originally Posted by foobeca
Not sure why the torque would be lower so much lower with the vias working. but notice how torque takes a noisedive after 4.7k rpm with the non-functional vias. The HP with a non-functional vias peaks also at about 4.7k rpm.
24hp at the wheels is good for ~30hp at the crank.
you dont really need the torque that late in the power band, you need torque early to get the car moving and hp later to make it go faster. the VIAS system starts to replace torque with hp by opening the butterfly valves, if they stay closed, you can make more torque, but lose hp. thats the reason behind valved mufflers, they close the valve at low rpms to create backpressure and increase torque, then open later to flow better and create hp.
03-12-2005, 08:41 AM
#15
With the VIAS broken, torque is very likely hampered all across the powerband, from low-end to high-end. This is because when the metal cup breaks, it never fully opens the power valve, BUT never fully CLOSES it either, causing a leak from the surge tank even at lower RPMs.
Fixing the VIAS cup, even if it does eventually break again, should give you a modest torque boost all over the place.
Fixing the VIAS cup, even if it does eventually break again, should give you a modest torque boost all over the place.
!
03-12-2005, 02:10 PM
#18
I do not recomend what I did to my VIAS- removing the power rod. This kills the low end and midrange considerably. My new VIAS will be installed under warranty sometime next week- just in time to drive down to TX.
03-12-2005, 03:42 PM
#19
Originally Posted by BlackBIRDVQ
I do not recomend what I did to my VIAS- removing the power rod. This kills the low end and midrange considerably. My new VIAS will be installed under warranty sometime next week- just in time to drive down to TX.
03-13-2005, 12:05 AM
#20
The spring in my manifold thats currently on the car didn't have much tension. I could fully compress it holding it with my fingers. I don't know how long it will take for the new one to fail, or even if it does fail. I heard Nissan redesigned the VIAS box due to alot of problems with them failing- I have been waiting for my VIAS for almost 3 months due to a backorder on them ! I will take mine apart when it comes in and see what it looks like. My old VIAS got eatten by my engine- the metal behind the cup got all chewed up and wasn't even there. Engine runs great with no problems, I have noticed the VIAS stopped working some 40K miles ago, and was getting weird noises from the engine- pinging like noise but not detonation. I think it was the intake manifold chunks getting sucked in.
03-13-2005, 07:24 AM
#23
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Join Date: Jul 2002
Posts: 2,836
Originally Posted by foobeca
I did the JBWeld VIAS fix yesterday. My car feels like a new car, it pulls hard after 5k rpm now and the engine seems to be a little more responsive and smooth at all engine RPMs.
Here is a good writeup I saw on how to do this:
http://www.cardomain.com/memberpage/763858/5
Passing and merging on the freeway is effortless now. I had such a bad powerdrop off after 5k that I usually used 4th gear rather than 3rd as a passing gear. I saw no reason to take it to the redline because there was less power there. The butt dyno tells me I gained more than 30hp. I prolly gained (or recovered) 1-2 sec. in the quarter mile.
If you haven't done this do it! It only took me about 30min and $3.99 to do. I had a hardon to get a 5.5gen or a 6th gen, but now don't see much of a reason to. I drove a stock 5 speed 3.5 Altima yesterday and it didn't feel any faster than my 00 Max with the VIAS fix, intake, and exhaust. Maybe a little more torque on the low end for the Altima, but didn't feel any faster.
Here is a good writeup I saw on how to do this:
http://www.cardomain.com/memberpage/763858/5
Passing and merging on the freeway is effortless now. I had such a bad powerdrop off after 5k that I usually used 4th gear rather than 3rd as a passing gear. I saw no reason to take it to the redline because there was less power there. The butt dyno tells me I gained more than 30hp. I prolly gained (or recovered) 1-2 sec. in the quarter mile.
If you haven't done this do it! It only took me about 30min and $3.99 to do. I had a hardon to get a 5.5gen or a 6th gen, but now don't see much of a reason to. I drove a stock 5 speed 3.5 Altima yesterday and it didn't feel any faster than my 00 Max with the VIAS fix, intake, and exhaust. Maybe a little more torque on the low end for the Altima, but didn't feel any faster.
03-13-2005, 09:12 AM
#25
Originally Posted by Lontar1
On this pic.. where should I put the JB weld...I want to this...or at least check mine out....
you see where the brass cup is inside of that hole on the right? the gray matter is JB Weld setting. Make sure that about every hour you move the rod after you put jbweld in the cup to ensure that it doesnt stick.
03-13-2005, 09:24 AM
#26
Originally Posted by harmbone2k2
I am not educated in this at all, but is this only for 00-01's?
03-13-2005, 11:06 AM
#28
Originally Posted by 30585
when i dynoed my max i got 183 hp and 196 tq in a 3rd gear dpull. does that sound right? i checked my vias and the actuator opened. could it still be busted?
I dyno'd around that w/ my '98 USIM... I/Y/E mods
03-13-2005, 04:25 PM
#33
Senior Member
Join Date: Jul 2004
Posts: 250
over 4 hrs just taking off the vias for me. suggestion, use a VICE GRIP!!!! I am still having prob with the 7 o'clock screw. I havent taken off as much as SPIRILIS in his pics but i have NO clearance to take off with vice grips. I have this god bent rod seriously in the way. WHAT TO DO!!!!?
03-13-2005, 06:10 PM
#35
Originally Posted by Luquire
Is there away to keep the vias open all the time. Kind of like having a vtec controller and setting it to engage at a really low rpm
03-13-2005, 08:25 PM
#36
Originally Posted by 30585
when i dynoed my max i got 183 hp and 196 tq in a 3rd gear dpull. does that sound right? i checked my vias and the actuator opened. could it still be busted?
03-13-2005, 08:26 PM
#37
Originally Posted by foobeca
I have 86k miles and my vias was completely non-functional. Your vias may be degrading even with only 32k miles. I suggest you fix yours too. Rememeber, you're not gaining HP above that of stock, but you are regaining what you had lost.
There's a few dynos on this thread:
http://forums.maxima.org/showthread....2&page=1&pp=30
SR20DEN dyno'ed it before and after:
before: whp 177.54 trq: 196.85
after: whp: 201.8 trq: 186.0
Not sure why the torque would be lower so much lower with the vias working. but notice how torque takes a noisedive after 4.7k rpm with the non-functional vias. The HP with a non-functional vias peaks also at about 4.7k rpm.
24hp at the wheels is good for ~30hp at the crank.
There's a few dynos on this thread:
http://forums.maxima.org/showthread....2&page=1&pp=30
SR20DEN dyno'ed it before and after:
before: whp 177.54 trq: 196.85
after: whp: 201.8 trq: 186.0
Not sure why the torque would be lower so much lower with the vias working. but notice how torque takes a noisedive after 4.7k rpm with the non-functional vias. The HP with a non-functional vias peaks also at about 4.7k rpm.
24hp at the wheels is good for ~30hp at the crank.
03-13-2005, 09:54 PM
#39
i also took the time to re-spray the black spacers that runs into the im with high temp cermic paint, i did thie due to nissans crappy paint that was peeling and fallin into the im.
