Well i finally did it, i knew i would. My Auto trans is pretty much on its way out as of today. i ran the car 3 times yesterday on the bottle and i guess the trans couldnt hang anymore... the trans now is slipping and no longer going into 2nd gear. it goes from 1st then slips to 2nd and then right after it just slips again and goes into 3rd.i cant get to any speed fast b/c in the 1st two gears it feels like the car is in neutral but its really not... ohhh well time to build up the trans to actually handle 300hp.

i thought id take a video so you guys could see what im talking about its about 5x worse now!
http://media.putfile.com/Maxima-Trans-Slip

the motor is ok and is still running like a champ!!

 

Did you do a drop resistor mod before you ran 100 shot?

 

I think the thread title says it all...

 

That suxs! I tried launching with 100-shot a few times, but my first tranny spun just the passenger-side tire and did NOT like the 1-2 shift at that spray level. Had to get Jclaw's traction bars to handle wheel-hop and pull-in as well.

I started used the dual-NX system next - launched on a 50-shot and kept that on, and sprayed another 75-shot from a floor switch. Still spun just one tire, even on 9.7" BGF DRs. Then I switched to an Infiniti VLSD low-mileage automatic, and things came together! I ran this way all season, but fried two motors when trying anything over 150-shot ( this year it's a J&S for me).

If you need to change transmissions, think hard about a VLSD version....

 

ehh . i thought about it and im going to part out the car and get a G35 most likely! when i was on the bottle i did the DR Mod. I also had a hayden trans cooler. so ill prob. be selling my ZEX race kit (not the wussy purple box) on the forums!!

 

Hmm, I have ran a 150 shot many times on all 3 of my auto Max's, 2k2, 97 and 95 and have never done that. The only other thing I did was flush and use Mobil 1 synthetic.

 

Jime, I think i know what killed the trans. i sprayed at 60 MPH... I was in Drive and it down shifted to 2nd then into 3rd, then after i ran out of 3rd gear at about 120 mph the trans tried to go to 4th (OD) but never quite made it. I guess it did shift out of 3rd eventually but it slipped really really bad from 3rd to 4th which prob. heated up the torque convertor to exreme temperatures because i didnt let off. I wanted to see exactly how fast my max was on n20. well apparently according to my apexi imoni i hit 212km/hr (131 mph) before i let off.

 

how did you have the nitrous activated. just to a WOT switch? meaning as soon as u floored it, it started spraying and downshifted while spraying? jime I think the reason your auto's never died was because u only took it from a dead stop to end of 1/4 so no downshifting was done and less heat buildup...

 

Top speed run + nitrous = Puts WAY too much stress on the motor. We had a long thread a while back about why its so bad, but I would not recommend running nitrous for longer than 15 seconds at a time. Either something was already wrong with your transmission, which sounds likely since your transmission did not shift into 4th, or you burned up a clutch when that happened and doomed your transmission. Driving hard NA will kill your transmission if its already weak, don't blame the nitrous

 

Well this is good to know. I got a ZEX dry 75 shot that I should have finished installing sometime Monday morning.
So please clarify for my n20 newbie @ss I cannot spray starting from 65mph 3rd gear with o/d on?
Or is it that you just can not continue to spray from 0mph all the way up to your top speed (too long of a spray?)

and is there a way to bypass our rev limiter? just so the fuel cutout will not happen?

 

put it this way, if ur already at WOT for a long time, ur already causing stress on the engine and transmission, so on top of that if you spray you double the stress. its never safe to spray for longer than 15 seconds for both the engine/trany and solonoids. As said by the NX tech "you can cause the coils in the solonoid to burn up if u spray for longer than 15 seconds"

if ur cruising at 65 and suddenly want to floor it and spray. first floor it and let the car downshift, then after you know the car has downshifted, activate the nitrous. Do Not, activate the nitrous while flooring it at the same time because that will probably cause it to slip while downshifting and build up alot of heat so by the time it shifts back up it will slip more and prob kill ur tranny. maybe the reason maxvq97 messed his up.

 

I have a Hayden tranny cooler too. Luckily I did a tranny flush right before spraying. I did a lot of freeway runs with nitrous and the car won't budge over 120 no matter how long you spray. Whatever you do never spray in the OD gear. The engine is in enough stress as is in OD. The best times to use nitrous is at the track because you run from a dead stop and the engine likes to rev in the low end. The fastest I've ever gone was in NA, not nitrous. 125 twice and 130 once. Wouldn't budge over 130.

I did exactly what Jime told me and a year later I'm here and both my motor and tranny are fine.

Oh and I own an altima, 4 cylender at that. Ran 75 shot.

 

Thanks guys you probably just saved my tranny

 

I just filled my bottle just now put in 75shot jets, and bough a msd window switch! so i dont have to worry about wen to turn the nitrous on or off... once i install it ill let u guys know how it goes wen using it. it has the lil modules to is activates at 3k and turns off at 6k. which is perfect. so it turns off beforeshifting.

 

you think a 100 shot is bad for the tranny, wait for the rest of the car to respond lol. 100 shot is serious business and you have to expect stock parts to fold under this amount of force. i ran a 100 shot once and after the third spray my motor was toast, the most i spray now is 50 because im tired of the headaches.

 

I can attest to 100 putting a lot of pressure on the motor.

 

you guys have 6 cylenders how can it kill the motor with a 100 shot? Unless you didn't run premium and switched plugs and had a bigger fuel pump and a fpr everything should run fine. Maybe the motor had problems before the nitrous?

 

no the motor can handle it fine its the other parts, gaskets, hoses ,injectors,tranny
and little small things that can fail from extreme pressure. i just blow my motors cause im stupid, lol.

 

I ran 75 shot a lot of times on my 4 cylender and never had any problems. If you want to save the auto mount a floor button. So that way when you WOT it downshifts then you press the floor button. Floor button is always useful at the track. As soon as it hooks up I press the floor button. It allowed me to spray at 2.5k in 1st gear on street tires. Running a WOT switch and nothing else is stupid, not only does it start spraying while the tranny is downshifting but at the track it wouldn't hook up unless I was in 3rd gear.

 

yes indeed. Mobil 1 going in my car morow!!! i hope the flush goes well and the car likes it. =\

 

i think 1st and 2nd are too short of gears. The only reason i would want NX would be for 3rd, maybe in 2nd from a stop but i would get a window sprayer so it would cut off. Im thinking auto as this is what i got. 3rd is so weak, so it would be nice to have a nice boost on the street but when do you really race on the street??

 

Would a window switch prevent this from happening? Cuz you wouldn't be spraying durring any shift.