schmellyfart

iTrader: (46)

Well it seems like my vias may not have been working properly after all. I tried switching around the nvcs setting on the eu and the curve didn't change at all. When I had it apart the cup didn't move by hand.. Sorry guys. Kinda sucks, but not much I can do about it now.

HP only:
http://www.flickr.com/photos/schmellyfart/8236193063/
TQ only:
http://www.flickr.com/photos/schmellyfart/8237259538/
Both:
http://www.flickr.com/photos/schmellyfart/8236193387/
I'll put the intake dynos up relatively soon.

deloa84

iTrader: (5)

So the stock rev limiter is around 6.4rpm I am assuming?? And you extended to 7.2 from the looks of it... I may or may not rev that high on my 3.5, don't know yet...

Would you have had a higher torque band if your vias worked instead of a plateau/mesa looking graph for the torque?

schmellyfart

iTrader: (46)

Yeah 6500, I wouldn't go any higher than that if you still have the stock intake manifold.

I don't know about the torque, but the horsepower would have kept climbing above 5000.

deloa84

iTrader: (5)

Yeah I don't think I have plans to rev any higher right now. Not sure if I would have to upgrade my oil pump as well. I am looking at some cams as well as an intake from an 07+ Altima or 09+Maxima.

Then my plans are to rev to 7500
That may require me to upgrade my rod bolts as well. I shall see down the road...

schmellyfart

iTrader: (46)

Oh, moar thread derailing.

deloa84

iTrader: (5)

Quickywd01

iTrader: (16)

Too bad the VIAS didn't work. I deleted mine because I have a SC which made me believe it would be better to have it deleted for all out hp. If anyone is thinking about tq, I have a NOS kit that I haven't decided how to use yet but it could provide tq wherever I want. I think that if you do a lot of daily driving the added tq that the VIAS provides would be beneficial and you can still pull it out quickly at the track. But then which setup would be faster? Would the added tq reduce your 60' time enough to make it worth keeping or would the added top end pull hard enough to get a faster time?

Product_Of_Korea

iTrader: (8)

Corrected. I know from personal experience(dont ask)

Sorry ill go back to the topic.

How does your a/f look? And i would think you should be still making better power after the limiter. Get that vias fix and do it again

schmellyfart

iTrader: (46)

I had a blast driving around town with the power rod installed for the few days before the dyno, and saw slightly better mpg on my scangauge since I didn't have to give it as much throttle to accelerate and keep the car moving.

As far as the 60', I might test that at the track on the 15th, depends on what the second dyno shows for top end gains, since we already know that there is a difference of 25lb ft lb at 4000rpm. and 15 ft lb peak.

I am planning on jb welding the cup and going back for the dyno day they are having on the 15th. That said, is there any concrete way to verify that the power rod itself is actually moving? Besides butt dyno, actual dyno, and 1/4 mile? Because I will only have 2 pulls and no time to fiddle with the power rod on the dyno.
With the power rod delete, afr was in 13s across the board with a rich spike or two. drf 004 and 005 are me smoothing out the rev limiter and tuning above 6500 since it started out pretty rich. I have more dynos and stuff to post, just gotta type it all up.

schmellyfart

iTrader: (46)

Alright guys here are the maf dynos and my notes. I don't feel like typing my notes out so here's a pic of them. The timing noted for each run was the peak value at fuel cut. (7200 in most cases). After I finished with the 3" maf I tossed the 3.5 back on just to see what it would do. Not a huge difference at all, not worth the money on a 3.0 IMO.



Here are the maf dynos, my 3.5" maf vs the stock maf. Both with legnth tuned 3.5" and 3" pipes respectively. The only thing that may affect the results is the front breather was connected to the 3.5" intake, the front breather vented to atmosphere on the 3"

Initial comparison there are some runs in between where I was messing with timing.
http://www.flickr.com/photos/schmellyfart/8242322643/
After that I immediately put the 3.5" back on and did 2 back to back runs and called it a day.

http://www.flickr.com/photos/schmellyfart/8242322887/

I also noticed one of my first few runs maxed out at 39* of timing, so with the stock maf I kicked the timing up from 32* peak to 39* because I thought most of the 3.5" dynos were at 39*. There was an avg peak difference of 5.87hp and 3.05 lb ft.

http://www.flickr.com/photos/schmellyfart/8242351621/
My highest dyno of the day. I forgot to type a "-" into my fuel map at 5.5k. I didn't spend any time fine tuning the hump over 6500.
http://www.flickr.com/photos/schmellyfart/8242358429/

Quickywd01

iTrader: (16)

I really want to see if it's worth taking out the rod especially since you're revving higher. Man, I really have to rethink this since my car is meant to be a daily and the TQ difference is huge! Keep up the good work!

schmellyfart

iTrader: (46)

Yeah I'm curious to see what it does on the top end, my guess is that the hp will peak around 200, but the tq...who knows.

maxboy325

iTrader: (35)

I would really think your car would dyno more. I plan to dyno my car with 3.5 intake in the spring. My clutch is slipping so it wont happen until spring. Im sure your car has more power hidden somewhere. Thanks for the dynos

MoncefA33

iTrader: (6)

Looks to me like your VI is doing its thing. Mine was gutted (power rod removed so it was always using the short runners) and made power to 6500 and held the power to 7100.

carsnwomen91

^^ I don't think vias was working at all. Power and torque fall right on their face like usim. 00vi flattens the power line instead of it falling and vias delete should make power climb all the way To redline.

This is perfect thank you soooo much schmelly!! Would the broken vias On the graph Be a good representation of what usim does as rpms climb or broken vias worse than usim?

I shift at 2500 or less so I don't think there will be much to notice with the rod gone in the city. it would still be good to see vias vs vias delete but nonetheless I'm very greatful for your research... Looks like I'll be removing that rod in the summer!

ABIGBRAIN

iTrader: (1)

A non functioning VIAS would give slighty better Hp and torque over a USIM until it hits 4800 rpm due to the fact that the long runners are smaller than the USIM. After that the non working VIAS and long runners are not enough to feed the motor at high RPM's.

Andy

max1008

It not HP gains you are looking for on a LW pulley....stick that with a lightweight flywheel and it's the faster revs you are going to see. It's a noticeable difference, I love it..although I have no traction through first.

schmellyfart

iTrader: (46)

Maybe its cause I haven't had my car aligned in over two years, after working on the suspension multiple times. I've heard that the alignment has a small effect on dynos.
No, the VI is definitely busted. I swapped the activation points on the dyno and it made absolutely no difference in the powerband. My dynos with top end power are all without the power rod.
Its actually pretty similar, here is mine compared to aackshuns red 4th gen.
Broken vias:
http://www.flickr.com/photos/schmellyfart/8254349154/http://www.flickr.com/photos/schmellyfart/8254349154/ by http://www.flickr.com/people/schmellyfart/, on Flickr

Deleted power rod:
http://www.flickr.com/photos/schmellyfart/8254349576/http://www.flickr.com/photos/schmellyfart/8254349576/ by http://www.flickr.com/people/schmellyfart/, on Flickr

There's a 12ft-lb difference at 2600 rpm, but let me tell you. I usually shift between 2k and 2.2k and installing the power rod made a huge difference around town. It would pick up and go whereas without the power rod it feels sluggish. The few days I had it installed, I loved driving around town.

schmellyfart

iTrader: (46)

Upon further inspection, it seems that the vias cup is still good. I manually turned it with the rod and there was no slippage or free movement. This leads me to believe that the power rod wasn't completely seated in the vias cup when I dynoed.

The power rod is installed again and I verified that moving the actuator arm does turn the power rod.