Rpm limits

Since I put the blower on, I've done it a few times. Mainly offroad though.

 

yea..told ya..haha

sure. Never for longer then a second though. stupid too. And like I said. Power starts to drop around 4.5k anyways..

you mudder you

 

Actually I haven't hit a deep mud hole in a long long time. It mainly happens climbing a slick hill trying to keep my wheel speed up while in a low gear and just accidentally knocking on the limiter a few times. I never hold it on it. I'm still weary that my old truck won't handle high rpms for too long lol.

 

But...But...it gets so much louder!

Haha it makes so much noise but sure as hell doesn't make a difference in forward momentum.

 

really?? jesus man..even when im crawling up something that takes a lot of skinny pedal im never close to the rev limiter. Spinning wheels = less traction then slow moving non spinning wheels.

 

Not really limited by the strength of the internals but by the intake valves/cam timing. The 5VZ is designed for low end power, after 5000ish RPMs, your engine isn't getting enough air and you lose power.

This. Before VTEC/VVT, etc... you had to design your valve timing to be low, mid, or high end. High end power tended to do poorly in MPG's and idle rough so most cars generated low to mid range power. VTEC allowed more than one cam setting for low end power during lower RPM's and high end power during higher RPMs by opening the intake valves more and longer for more air intake. New variable valve timing technology allows the valve timing to be dynamically controlled for all RPM ranges.

But like everyone said, its a truck. Don't expect it to be fast.

Hope this helps.

 

Stock limiter is around 5750 rpm +/-..... This is safe for 5vz due to short stroke and strong internals. Valvetrain work would need to be done at a min to go much over 6k rpm. Also you would need an aftermarket tuner to raise the limiter. Some extra power can be made with higher rpms but to be worth it other mods would need to be done. Tuning, heads, cams, n2o, or forced induction to name a few. Not worth it unless you making a race truck out of it.....If the 1gr can live 100 hours at 6200 rpm the 5vz could live much longer at or above its oem limiter with its shorter stroke..... the 1gr is basically a slightly over bored modern 5vz with longer stroke and weaker parts.....

 

Here is what you will need:

http://www.lceperformance.com/Service-Camshaft-Hard-Weld-Regrind-5VZ-3-4-Liter-p/1022076.htm

~$1700.

 

Step one: remove engine.

Step two: install this engine



Redline for days.

 

Redlined? Sure.

Only a few times in the 15 years I've owned it.

But I have never hit the limiter for over 5 seconds and thought to myself, "how much longer can I have it pinned and is there anyway to bypass it all together"

 

That is just the tip of the ice berg.

Hahahahahahaha bye bye torque

 

also bye bye reliability and fuel mileage.

But don't tell this kid that.

 

seriously, i rarely go over 3 and still beat half the traffic around town

 

Meh, it's a start. 3VZ-FE cams are a bit more aggressive and are interchangeable, a cheaper alternative:

http://www.v6mr2.com/5vzfe/5vzfe.html

I think URD offered some performance cams also but found that the stock cams generally were the best.

OP, this is a torque inspired engine so stick with what works best. And keep off the limiter.

 

What exactly is the Overheat Protection in that link?

 

revving and hitting the rev limiter are different things


the only time I've ever hit the limiter was playing on loose stuff
http://www.youtube.com/watch?feature=player_embedded&v=Z4V5Fb9e5NY#t=47

 

Ahhhhh I just re read the OP and misunderstood it the first time, I thought he was just asking where the redline was and if it was safe to hit and then y'all started flaming him for wanting to hit the redline.

OP, raising your rev limiter won't do shit for you. Check out this dyno graph:



You can see the power drop off after about 5000 RPMs. It'll only keep dropping if the RPMS go higher, until the engine goes boom and your power drops to 0.

As for hitting the redline, no I don't peg my truck on it for much time but I ping it off the limiter once in awhile. I don't see any reason to hesitate too, as I said earlier there's a limiter there for a reason. It's not gaining you anything, but I wouldn't say it's hurting anything either.

 

Yeah, you need to do some cam work to open up the top end (at the expense of bottom end power). Basically, the intake valves are not open long enough to feed the cylinders enough air.

You can see the torque curve on a downward turn as early as 3000-3500 rpms. This is where your efficiency starts to decrease. Between 4000-4500 is were you HP levels out and around 5000rpms, you engine is gasping for air.

 

My automatic shifts before I get to the redline, even with it floored. There's no point revving that high, I've actually gone faster quicker when shifting at about 4k.

 

Yea I know. Where we wheel its more of the hard packed clay with a few slick rocks on top with good dry dirt underneath. So when it gets wet, it gets slicker than owl shit and wheel speed cuts away the slick stuff on top and digs down to the good dirt. Trust me, I don't like doing it nor do I do it often. I would much rather keep my wheel speed and rpms down, but I think that if i wasn't manual then my rpms would be better because I wouldn't have to worry about bogging the motor by using a higher gear. I've only ever done it after a real hard rain, never when it was dry. I don't want to take a chance on the tires catching traction and snapping an axle, u-joint, or worse.

Some of the 2nd gen/fjc guys that I wheel with, love the sound of their truck on the rev limiter.