Another post I was reading was talking about being scared to run high RPM. Thay said 5000 was unseen, or vbery rare???

How many of you run their truck into the higher RPM, when & how long, Any problems, Manual or auto?

I personally run mine to redline with no problems. To 5000 when pulling into traffic.

Matt

 

my truck screams!!!!!

probably why my timing chain is fubared now... but hell, if you dont drive it like you stole it, its not worth driving....

 

i like the way my truck sounds when i shift and 5000 rpms i do this all the time and when i go play in the mud i redline it alot

 

with a S/C V-6 auto I normally never go above 2300 rpm, unless in extreme situations. Premium gas is toooooo pricey to be lead footing it.

normal cruzin is under 2 grand

 

i get the rpms up if i have to, like when pullling into traffic, but i usually shift around 3000. saves gas.

 

I regularly shift at 4k...hehehe is that bad? When pulling into traffic on the highway it runs right to 5k no prob.

 

Sounds like its revving higher when I have a hangover...

 

It's not a good idea so don't make a habit of it or hold it too long. A year ago we had a Corvette come into the shop where the guy had over revved his engine at a drag strip, one of the intake valves fell into the cylinder and it was over with. When the technician pulled the heads off he showed me the other piston heads and they all had deep indentions which he said was also from over revving the engine.

 

you dont get deep indentations unless someone screwd with timing and stuff hit

 

Toyota puts a rev limiter on the engine to prevent this. The 3.0 is a non interferance head so you will never tap the valves on the piston (even if the timing is out). The only way in the vette to do it would be by the timing slipping (yes from overrevving)

 

You bet me to the punch Jim

Were the indentations you saw the machined marks to make divits in the piston to turn it into a non interferance head?

 

usually shift under 3k, but will run it up at times so i can hear the deckplate rumble

 

I have run my 3.4L over 5k several times...unintenionally. But from what I understand that smaller engines can handle higher RPM's easier than larger mass V8's. We do know that they can rev faster because of the lower mass. I know there are other factors involved. I also think most of us could agree that Toyota builds a fairly tight tolerance engine and detunes it somewhat for longer life. I believe the engine can handle redline without any issues, probably a 10-20% fudge factor built in by the engineers.

Just my 2 cents.

 

my friend jsut got an lce 22re cammed and 2.5L its awesome... has a full lce exhuast too... it sounds beatiful.... he drives it, but not too high yet... he is still under 1k miles on it.....

 

I thought that myself when I first looked at it, but they were too deep and the valves were "rolled" back on the face to the margins indicating an impact.


edit: I think the technician kept one of the valves as a "memory" item. I will ask him tomorrow if he still has it and get my gf's digi cam to take a pic of it.

edit2: I just got to thinking... the valve that did drop into the cylinder, could that maybe have thrown the timing off since the piston would have a smaller area to compress into, then again I don't understand how the head wouldn't have blew off with a valve missing. I'm still learning here so help me if you understand where I'm going.

 

What year of vette was it?

That is GM for ya

 

I don't remember what year, it was a fairly newer one. The man who brought it in also supplied some sort of conversion for it? Something about going from one generation to a newer generation engine. I'm not Certified in 'Vetes so I don't mess with them.

 

I'm thinking of using Motul 300v 15-50 synthetic competition motorcycle oil in my yota because I only run it at a high rpm. High rpms is where the powerband is. I swear between 5k and 6k the thing pulls the best. 01 v6 x cab taco trd. Small engines (especially toyota) are built to run at higher rpms... My 600rr redlines at 15.5k so getting off the bike at a trackday and then getting in the Taco can be a bad thing...

 

the Tacoma has seen the rev limiter a few times, mainly from wheel spin in 1st, i normally dont take it past 5k because it seems like the power falls off after that, the 4runner has been around 6k once or twice (wet rocks)

 

My SOHC 2-valve 3.0 V6 pulled to 5700 RPMs better than my DOHC 4-valve 3.4 V6...go figure. I guess Toyota cammed the 3.4 for better low end grunt. Meanwhile my DOHC 4-valve Supra pulls to the 6900 RPM revlimiter with extreme ease.