96BLUMAX

iTrader: (3)

For those out there who bought a VI for their auto, has anyone been to the track with it? I am wondering because I hear about how 5spd guys have raised their shift points with VI and for an auto you always have the shift point at redline if you just floor it so I was wondering what peoples' results are with the VI and automatic?(Sorry long sentence)

BSwithTF

iTrader: (8)

It's about the same as my OEM manifold best. The difference between them is weather conditions. I didn't get my times down that low with the OEM until it was low 50 degree weather with a tail wind. With the VI, I ran the same times except it was about 80-85 degrees with about 80 % humidity (middle of summer). I haven't ran in the cold weather yet.

In the summer, after I installed the VI, I had a couple glitches at the track with it turning on and off. With it turning on correctly, I was running 15.1's-15.3's. Then, my car felt like crap and I started running 15.5's-15.6's. My RPM switch reset and wasn't activating the VI. This was the biggest difference I saw as to just how much the VI helps.

I have the JWT ECU and I shift it manually at about 6800-6900. It takes a minute for it to shift and if I wait till 7k I usually hit the rev limiter.

Victim64

96sleeper had a gain from about 14.9's to 14.7's and about 2-3mph. He still is waiting to get a good run in cool weather with the VIM though.

iansw

iTrader: (7)

My site is down right now, or I'd show you my timeslips.

But basically, it's this:

I gained .4 seconds and +3mph when I was NA with the VI - this is with a nearly identical 60' time.

IanS

max'n out

You can adjust it on the Auto too.

96BLUMAX

iTrader: (3)

What your shift points? Thats what i meant. The fastest times are from letting the car shift itself so i was wondering the effects of the VI.

iansw

iTrader: (7)

The runs were with 18's on, stereo (1 10", huge amp rack, and 3 amps) in trunk, and only a Pop Charger and Y-pipe.

IanS

96sleeper

iTrader: (4)

The fastest times are not from letting the car shift itself...and this is definately true after you get a VIM also. Before the VIM, I ran my best times shifting 1-2 at redline, and shifting 2-3 right before redline. I verified this with over 75 passes down the track. After you get a VIM, shift at redline both times to fully maximize the better flow.

Nismo

iTrader: (18)

has anyone tried putting the shifter in 2nd and let the car shift the 1-2 buy itself since it already reflines the 1-2 shift, that way you would only have to put it in drive after 2nd gear redlines.

Victim64

It will bounce of the rev limiter. The car is pulling much harder than when stock so when the tranny ecu tells it to switch gears it is too late if you are at WOT.

And are we just trying to be lazy?

SWEETSOUND2001

iTrader: (30)

Will it have the same problem if you have VB mod? Because the tranny will shift much faster.

96sleeper

iTrader: (4)

I have a VB mod, and I still bang the rev-limiter sometimes. Mainly on a downshift from about 20 though, from a stop it won't hit the limiter on the 1-2 shift. I hit it alot manually shifting though, it can be hard to time it just right.

CalsonicSE

iTrader: (3)

The only difference between the 14.9 and the 14.7 run was the addition of the VI, correct?

So, if this is true, I wonder why all these recent threads say the VI yields the same 1/4 times (for 5-speeds) as the OEM intake manifold. Perhaps it's different for autos.

deezo

iTrader: (3)

Personally, my fastest times were without shifting. I hate the way the computer calculates when to let the gears fall into place when you shift manually and there's to much delay. At redline I just feather off of the accelerator a bit to allow the gear to just fall into each gear. It almost shifts as fast as the VB but just not as hard. I'm only speaking about high my car reacts to the shifting thing.