v6maximus

He, just was wondering, I think nissan designed the VQ30DE as a high reving engine, especialy the ones with the MEVI, cause the thing gains in top end and suffers low end a bit, and it wouldnt be logic to do that on an engine that was designed only to be drivin in the low rpm band...

So how far do you guys rev your VQ's?

I rev the crap out of mine, 6500 rpm, especialy in 2nd and 3d it's great to rev it to the limiter, 1st gear I always take easy, since it was just ment to get roling and not for building speed.

2000Infinitii30

I guess it would depend on how long you wanted your car to last.

I30tMikeD

iTrader: (8)

I take it out to 7200 usually once a day

Luigi38

iTrader: (2)

I usually take it easy on the I30. Under normal driving I shift between 3k-4k, but sometimes when I want to have fun I rev it to 7k max.

I30tMikeD

iTrader: (8)

You have an MEVI along with your JWT ECU?

euromax

i always drive pretty smoothly, and dont take it over 4k rpm but occasionally i just kick it but i always shift before redline. wonder if ppl think i rev the fu*ck out of the engine, becouse i am only 18 years old.

leeI35

Can you be a little more specific?

Are you talking about like a stoplight race reving or when at the track reving? Or are you talking about just normal driving then WOTing (Wide Open Throttle) and shifting at high rpms. I wouldn't brake torque an auto, if so, only at the track and thats rarely (actually haven't done it yet with the I35) but like street racing or highway balling, I have gone to about redline and shifted using the gate shifter 1>2>3>4 method. Actually i use the gate shifter more than normal driving in D4. I think i am going to kill the transmission but hey it's just a car and it can be replaced and I like downshifting manually with the auto more than slamming on the brakes.

flthere

iTrader: (2)

just a small question, is it okk to change from D to 2 while the car is in motion ?!? I have an auto I30 and I haven't tried this yet but I want to try. Maybe on a rental car first Thing is, I experienced flat or no acceleration on WOT couple of times while trying to rev up on a highway ramp (with O/D off I'm in 3rd gear) and I always thought it'd be nice if i can manually shift to 2nd and move quickly into the lane ... Worst, two days ago, it was raining and the car was flat on me while I tried to squeeze into the lane between 2 cars. I guess I scared the hell out of the driver before whom I tried to merge!!!

Oh! Not to digress from the topic, I revved upto 6k couple of times

leeI35

[QUOTE=flthere]just a small question, is it okk to change from D to 2 while the car is in motion ?!? I have an auto I30 and I haven't tried this yet but I want to try. Maybe on a rental car first QUOTE]

I think if you had overdrive (d4) off then you are ok to shift to (D2). Otherwise at high rpms and you suddenly dropped it to (d2) from (d4), i don't think your tranny is going to like you too much. When I am driving through DC i use D3. And when i am on the highway I shift into D4. The reason i use D3, is for less gears the transmission is looking for. If i need a sudden kick of power instead of going from D4 and the ecu choosing which gear D3 or D2, it will only choose D2 or D1. I drive on the highway in d4 and if i need the sudden boost of passing power, i downshift to D3 or whatever appropriate gear is right for the occassion. Anyway, back to you point....if you are going to do the D>D2 switch make sure you watch your rpms and make sure you are not in D4 at the time.

roofadoofalus

i would not reccomend that

flthere

iTrader: (2)

[QUOTE=leeI35]Let's say I am in D3, then can I shift to D2 and come back to D3 ? While doing these transitions, I guess we should take the leg off the accelerator for that one second, true ?

v6maximus

I'm talking about stoplight races, they are fun!

Also about sometimes on the highway when someone challanges me, I shift down to 3d and go WOT, they just can't match the VQ I guess cause I only lost one time, and that was to a Toyota Supra from 1989, so nothing to be emberaced of I think.

Under normal driving I shift smooth and most of the times between 3 and 3.5 k rpm.

NewLoveI30

Why not let the auto do what it is supposed to do?

If I am driving spiritedly I may turn the O/D off to lock out 4th and lock-up, but thats about it.

roofadoofalus

i would imagine that doing all of this shifting ",anually" would put a whole lot of extra stress on your tranny

roofadoofalus

and by "anually," i really meant "manually"

v6maximus

I have a manual transmission, I'm supposed to shift manualy...

roofadoofalus

then shifting manually is acceptable

leeI35

LOL!

Well let me clearify. If it's a stoplight battle then it's gate shifter time 1>2>3>4 otherwise i am in d3. I don't have the option of hitting a button and turning overddrive off. I have to move the gear selector over-and-down to d3. Not a problem, i usually play with D3 and D4 all the time. Not a big issue for me and neither is the gas mileage. I like being in control of my car at all times and not the damn ecu especially when in out of traffic and highway passing. The sudden lag of instant WOT is eliminated.

p.s. When i receive my headers and exhaust all of the gear shifting will be eliminated. I will have the power i need without having to play with gears. woot woot!

roofadoofalus

is that so

95maxrider

iTrader: (32)

Manually shifting a stock auto will eventually put a hurting on it. I tried it a few times with my old Maxima and didn't see the need to do it again. If you have valve body, a tranny cooler, or some other built parts in your auto, it might not be AS bad for it, but I still wouldn't shift in manually on a regular basis.
About revving the engine....when my car was running fine, I would wind out 2nd at least once a day. If the damn car can't stand to rev to redline on a daily basis, then f- it. When I get my ECU back from JWT I plan on going to 7k even more frequently. I just take it easy on the tranny. As long as you don't sit there at redline for extended periods, the engine should rev to redline just fine when you want it to.

i30ds

iTrader: (8)

"Manually" shifting the auto is not benificial for racing in any way. It does not give you more power, or more powerfull shifts. Nor does it need more gas to do so. If you floor it at the stoplight, and I mean all the way, the car shifts at redline though out each and every gear until you let off the gas, which is what you want...

The only time you would want to "manually" shift is to keep the transmission in the selected gear, instead of having to supply a heavy foot on the accelerator pedal to hold the gear. An example would be keeping it in 1st while driving through an area of speed bumps, so the tranny does not up shift into 2nd only to down shift again into 1st when the next bump comes. Or to down shift a gear into the "sweet spot" for more power while going up a pass (although this can be done by pressing harder on the accelerator as well)

roofadoofalus

i believe that "manually" shifting would actually help performance slightly. one would be able to hold the gears longer. i am definately against this, as i know that it ruins tranny's, but i do believe it helps the performance slightly

Karkov

Well i dont have any technical info about manually shifting the auto, but 1) you do get a little more out of the rpm band by doing it( so there is better permormance) 2) the ecu will shift down to second so I cant see any difference if you do it your self and 3) if it did hurt the tranny why would infiniti put the staggered gear shifter in the i35????
? the only purpose for the staggered gear shifter is so you can find your gear while manually shifting.

roofadoofalus

i thought most newer cars had the ability to "hold" the gears

i30ds

iTrader: (8)

It will not help... giving the vehicle the FULL amount of fuel will make you hold the each gear to redline, and less fuel can make you shift sooner. Anybody that knows there car well enough, knows exacly how much fuel to give to engine, which in turn decides the rpm at which the transmission shifts gears at your descrestion... There is no performance advantage.

Why would manually shifting hurt the tranny?? It does the exact same shifts anyways, in the exact same manner, in various places with in the rpm range..

The only advantage, like I said before, is the ability to hold the gear indefinitely (for speed bumps, traffic lights, going up a pass)

roofadoofalus

it puts extra stress on the transmition

v6maximus

Dudes, we are going off topic, I wasn't talking about AT, I have 5 speed manual tranny. Like I said before, and I just want to know if revving to 6500 rpm and maybe beyond that point in the future by JWT ECU would hurt my engine or manual tranny.

GreetZ, Maximus

I30tMikeD

iTrader: (8)

hahaha....if we are gonna have just a 5spd I30 thread there will be about 3 people in it. I rev out to 7200 without any problems.

v6maximus

Ow... are they that rare? I didn't know that. I just meant that I was talking about the engine's limit's, not those of the tranny...

Anyway, thanks for your reply mike

roofadoofalus

from what i understand, there were no 5-speed i30's after 1999

I30tMikeD

iTrader: (8)

yhea and your point is?

i30ds

iTrader: (8)

You do not seem to be understanding me, it does NOT add any extra stress on the tranny. Only tranny drops will do that!

roofadoofalus

i thought you had an automatic.

v6maximus

Let's clarifie something...

I have a 1995 Nissan Maxima QX 3.0i-24v 5 speed manual with VLSD (european spec)

the european spec cars have the same bodywork as the I30 with the interior simular to the US spec Maxima's. Also all the extra luxerys the I30 has are present on the E-spec maxima QX. So the only difference with the I30 are some minor exterior things (front bumper, grill, decals) and the look of the dashboard.

GreetZ,
Maximus

roofadoofalus

thank you for the clarification

v6maximus

Your welcome