Considering the gearing of the auto, will raising the rev limiter benefit the VQ on an auto as much as it would on a 5spd? Just something that I have been chewing on, anyone know?

 

No, you'll be way out of your torque curve, so driving at higher engine speeds will yield no benefit.

 

I think once you raise the rev limiter you have to go to a higher stall torque converter. Stock is about 2300 so go to a 3300 and take advantage of your higher power curve. Of course you'll have to beef up your valve body.

 

If you raise your rev limiter with an UPRD ECU, or a JWT ECU on an automatic, wouldn't you also have to change the shift points on the tranny ECU to take advantage of that higher limit? I mean won't the car still be shifting at the same points? So basically, it wouldn't matter if the rev limiter was higher or not, right?

 

Bumping up the revv limiter will not at all benefit you in any way, in fact, it would hurt you at that RPM... that is way past the torque curve, the motor doesn't produce any more power up there... if you want to compete with a 5-speed, do Don's valve body job and bolt a blower onto that thing. Get some sticky tires (i.e. Nitto 555R Drag Radials) and launch hard... get him out of the hole and cross your fingers... ooh and keep it to the floor :-)

-Chris

 

yep, it'll still shift the same if left in D, but if you shift 1-2-D, then you can rev it up higher and shift later (just buy a manual!!! hehe)

 

Since peak HP is much higher (6400) and the tranny shifts before it reaches peak HP (6000-6100).

 

What about on a 2K Auto Max... I know the HP peak is close, if not above, the redline... would that benifit?

 

not necessarily,

the supercharger pulls all the way up to the rev limiter, so if you raise the limiter, you raise the hp gains at the top end.

so. it's not that lame to raise it.

true, in an NA maxima, i wouldn't really do much. but hell. might as well