Vias delete plus Injen cai=bad??
12-01-2009, 07:37 PM
#1
Vias delete plus Injen cai=bad??
I did the Vias delete on my 5.5 6mt that loses some low end but allows a gain in the upper rpm band. (and yes, you feel it). However I just got a Injen CAI which I understand Takes high end power but provides low end... In theory.. If I instal the CAI am I just un-doing what I just did?
12-01-2009, 09:17 PM
#2
No. The injen intake takes low range power and adds it up top as well. Your intake gains should be most noticeable after about 3800 rpms. I haven't personally done the vias delete so I can't comment there, but you are correct it takes low range power and adds it up top.
12-02-2009, 05:57 AM
#7
Two different VIAS-delete threads, e-subliminal? And both on the same day? OK, then. 
You're probably not gaining anything measurable in the low-end with the Injen, what you're doing is accessing colder air on the launch... so it feels like a gain as you snap off the line. Once you get moving, air is air, whether it's short-ram or CAI.
Radiator, Hotshot? The Injen's I've seen always poke their filter into the fender. Isn't it that way for the 5th Gen?
You're probably not gaining anything measurable in the low-end with the Injen, what you're doing is accessing colder air on the launch... so it feels like a gain as you snap off the line. Once you get moving, air is air, whether it's short-ram or CAI.
Radiator, Hotshot? The Injen's I've seen always poke their filter into the fender. Isn't it that way for the 5th Gen?
12-02-2009, 06:07 AM
#8
nope.. the injen goes right along side the motor.. then turns 90* towards the floor where it sites behind the radiator...
i have never had one so i cant say from experience... but i have been reading about them on here for a long time and everything i have read says that they are bad on these motors in terms of them allowing hotter intake temps...there are a few threads...one on NYCmaximas that shows how to turn an injen into a fender intake and there is someone on here that 'heat wrapped' their injen...
also.. i think its important to note.. that depending on where you live the injen might feel good in colder temps(now) and then when summer hits might provide way more loss over a short ram..
i have never had one so i cant say from experience... but i have been reading about them on here for a long time and everything i have read says that they are bad on these motors in terms of them allowing hotter intake temps...there are a few threads...one on NYCmaximas that shows how to turn an injen into a fender intake and there is someone on here that 'heat wrapped' their injen...
also.. i think its important to note.. that depending on where you live the injen might feel good in colder temps(now) and then when summer hits might provide way more loss over a short ram..
12-02-2009, 06:54 AM
#9
+1 to MistMax.
Wait till it gets above 75 degrees F, you'll get a lot of heat soak. IMO, since the VQs have plenty of torque, switch to a short ram (convert the Injen to a short-ram or switch to Berk/JWT/etc) so your intake temps are more consistent and you have even better top-end performance (what VQ35s are more in need of). Using a short-ram in conjunction with the VIAS blockoff plate will make your top end feel niiiiice.
Wait till it gets above 75 degrees F, you'll get a lot of heat soak. IMO, since the VQs have plenty of torque, switch to a short ram (convert the Injen to a short-ram or switch to Berk/JWT/etc) so your intake temps are more consistent and you have even better top-end performance (what VQ35s are more in need of). Using a short-ram in conjunction with the VIAS blockoff plate will make your top end feel niiiiice.
12-02-2009, 06:55 AM
#10
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Although the Injen makes pretty cool sounds, it's a waste of cash.
BPI velocity stack = 35 dollars.
AEM Dryflow 6" filter = 40 dollars.
Add in a berk midpipe and you have a pretty nifty SRI.
BPI velocity stack = 35 dollars.
AEM Dryflow 6" filter = 40 dollars.
Add in a berk midpipe and you have a pretty nifty SRI.
12-02-2009, 07:43 AM
#12
Two different VIAS-delete threads, e-subliminal? And both on the same day? OK, then.
You're probably not gaining anything measurable in the low-end with the Injen, what you're doing is accessing colder air on the launch... so it feels like a gain as you snap off the line. Once you get moving, air is air, whether it's short-ram or CAI.
Radiator, Hotshot? The Injen's I've seen always poke their filter into the fender. Isn't it that way for the 5th Gen?
You're probably not gaining anything measurable in the low-end with the Injen, what you're doing is accessing colder air on the launch... so it feels like a gain as you snap off the line. Once you get moving, air is air, whether it's short-ram or CAI.
Radiator, Hotshot? The Injen's I've seen always poke their filter into the fender. Isn't it that way for the 5th Gen?
1 spoke of how I "masterfully" conducted the "vicious" vias delete on my own.
The second was merely a quesiton about this "monster" intake and if i'd hurt myself with the vias delete and the injen.
Lastly, "Once you get moving air is air". I understand what you're saying but if you have a intake receiving straight air while moving compared to one hidden under your hood behind the battery wouldn't one in theory make sense to be taking in more air than the one trapped under your hood? Excluding the heat that is already a variable from the motor? Or am I understanding this completely wrong?
12-02-2009, 07:50 AM
#13
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no no no no no, you see, what had happened wasssss
1 spoke of how I "masterfully" conducted the "vicious" vias delete on my own.
The second was merely a quesiton about this "monster" intake and if i'd hurt myself with the vias delete and the injen.
Lastly, "Once you get moving air is air". I understand what you're saying but if you have a intake receiving straight air while moving compared to one hidden under your hood behind the battery wouldn't one in theory make sense to be taking in more air than the one trapped under your hood? Excluding the heat that is already a variable from the motor? Or am I understanding this completely wrong?
1 spoke of how I "masterfully" conducted the "vicious" vias delete on my own.
The second was merely a quesiton about this "monster" intake and if i'd hurt myself with the vias delete and the injen.
Lastly, "Once you get moving air is air". I understand what you're saying but if you have a intake receiving straight air while moving compared to one hidden under your hood behind the battery wouldn't one in theory make sense to be taking in more air than the one trapped under your hood? Excluding the heat that is already a variable from the motor? Or am I understanding this completely wrong?
), there is a constant flow of ambient air into and through your engine bay. Although a CAI may get slightly colder temps, especially during a heatsoak situation such as sitting in staging lanes or stop-go traffic, it's also a much longer pipe. SRI's normally give the best topend power without noticeable loss in the lowend and are also the cheapest and easiest option.
12-02-2009, 10:46 AM
#15
Lastly, "Once you get moving air is air". I understand what you're saying but if you have a intake receiving straight air while moving compared to one hidden under your hood behind the battery wouldn't one in theory make sense to be taking in more air than the one trapped under your hood? Excluding the heat that is already a variable from the motor? Or am I understanding this completely wrong?
CAI gives you cold air on the launch, gains that are probably analogous to the effects of having a lightweight UDP. After the launch, your CAI doesn't matter, and your intake gains are coming by way of a less restricted air-flow. The only way you're going to truly lower your air temps continuously (on your 5.5 gen) is with phenolic spacers.
You already bought it, so install your Injen, extend it into the fender, and move on to some other project. I'm sure you'll be happy with it, until someday when you want to try something new.
Last edited by Rochester; 12-02-2009 at 10:49 AM.
12-02-2009, 10:59 AM
#16
12-02-2009, 11:52 AM
#17
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You're over-analyzing this.
CAI gives you cold air on the launch, gains that are probably analogous to the effects of having a lightweight UDP. After the launch, your CAI doesn't matter, and your intake gains are coming by way of a less restricted air-flow. The only way you're going to truly lower your air temps continuously (on your 5.5 gen) is with phenolic spacers.
You already bought it, so install your Injen, extend it into the fender, and move on to some other project. I'm sure you'll be happy with it, until someday when you want to try something new.
CAI gives you cold air on the launch, gains that are probably analogous to the effects of having a lightweight UDP. After the launch, your CAI doesn't matter, and your intake gains are coming by way of a less restricted air-flow. The only way you're going to truly lower your air temps continuously (on your 5.5 gen) is with phenolic spacers.
You already bought it, so install your Injen, extend it into the fender, and move on to some other project. I'm sure you'll be happy with it, until someday when you want to try something new.
good your listening.
12-02-2009, 12:13 PM
#19
Well I installed it last night and it's been pouring since so I haven't been able to even test the way injen makes it straight out the factory, yet alone get on to extending it yet..
12-02-2009, 06:02 PM
#21
A long tube cold air intake will probably help soften the 10-12 hp you lose from 2800-3800 rpms (based on the dyno sheet on the Altima in the VIAS vs stock vs SSIM thread), but I'm not sure if it will potentially take away from the top end gains. However, if the NWP intake spacers don't, seeing as part of the gain you get from them is due to lengthening the runners, then you will probably be fine with your intake and the block plate.
12-02-2009, 08:16 PM
#22
Lastly, "Once you get moving air is air". I understand what you're saying but if you have a intake receiving straight air while moving compared to one hidden under your hood behind the battery wouldn't one in theory make sense to be taking in more air than the one trapped under your hood? Excluding the heat that is already a variable from the motor? Or am I understanding this completely wrong?
and sparks- thats cool you have the splash shield off.. i thought i was the only one that did this.. there def is more air flow with it off IMHO.. talk to Knight about that.. i posted in some thread about how i took mine off and he opposed it saying it *might* create some venturi effect that would suck air out .. educated guess.. but i think it helps with it off.. especially if your running 12's and 13's
spread the word.. take the drivers side splash shield off!!
12-02-2009, 08:45 PM
#24
12-02-2009, 09:18 PM
#25
And yields absolutely no conclusive data. You dyno the car with the hood open, and a huge fan is blowing into it, distorting the actual environment that the intake is operating in. The differences in whp figures between intakes (assuming they're all done in one dyno session) are due to outside variables and are nearly negligible.
I think NMexMax said it best, stock airbox is fine for most setups, stock muffler is fine for most setups, but modify everything in between
EDIT 1,111 posts
12-02-2009, 10:31 PM
#26
No. The injen intake takes low range power and adds it up top as well. Your intake gains should be most noticeable after about 3800 rpms. I haven't personally done the vias delete so I can't comment there, but you are correct it takes low range power and adds it up top.
I found the low and midrange to but enhanced while the topend was lacking. THE TUBE IS TOO DAM LONG DUDE (39")!!!!!!
My new Hybrid Shortram Intake makes me wish I'd done this 4yrs ago....all it does is pull, pull more and pull somemore...No flat spots....my accelerations are definitely more violent and constant with every gear change in my 2003 A/T TE!!!!! Believe or not the Injen is cool but not for topend power.....
That was Then....
This was recent...Short Ram Intake #1....
This is Now!!!! Hybrid Shortram Intake #2....
12-03-2009, 05:44 AM
#27
12-03-2009, 06:54 AM
#28
Stock inlet probably isn't going to provide air to the engine without the stock intake to pull air in. Not exactly in an ideal location to provide a ram air effect.
12-06-2009, 07:09 PM
#30
Idk about directly on the maf. I had mine set so there was a small 3 inch tube from a previous intake on after the maf than I added the filter.... Kinda a short ram type thing. Feels better. But nothing I can honestly make a difference from..
12-06-2009, 08:17 PM
#32
TB>coupler or Oem Flex section>Oem Helmholtz resonator>coupler>MAF/adapter>Cone filter:
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