spinning past 5K

Its only worth doing if you have a huge turbo and the other airflow improvements(cam, fly cut pistons, head) to handle it, and you are pulling.

"tightening down the springs" aint gonna do it either. You need a 5k GSK, and a good fuel system.
 
Past 3500RPM is useless :clap:.
Extra R's for big huffers.
Brandon
 
teddybear said:
IMO The only benefit would be in competition applications. Either drag racing or sled pulling.
Click to expand...

Another one in either of these applications is staying out of the T/Q range, it sure does tear allot of stuff up. Even in my little hp application hooked up at less than 3K makes me think......somethings about to break.....then the tires will start to give up!

Nice vid, that's a good running truck.

Jim
 
Oh Ok. I didn't think that they built engines to spin that hard. Everytime time I talked to them they said 3500-4000 down the track. I didn't like the way they came across. I told them that I wanted 5+ down the track and they laughed at me.
 
Not many people can judge the RPM by sound. I am not saying I can, but I have experienced pullers come up to me, and think I am spinning over 5000, and I am not. It takes some air to make power past 5000 rpm.
 
zstroken said:
Not many people can judge the RPM by sound. I am not saying I can, but I have experienced pullers come up to me, and think I am spinning over 5000, and I am not. It takes some air to make power past 5000 rpm.
Click to expand...

X2. What some people think is 5000 is usually around 4000 or so.
 
The gasser trash RWYBers HATED Drews truck. Its on its second owner since he ran it last, and a Super Stock tractor mechanic working on it, among others who have a lot trips down the track in a 4x4.
Can't wait to see what they come up with.

Jims right high rpm takes you out of the TQ range, and help keeps a big single lit.

Running at 3200 rpm in a higher gear gets you the same wheelspeed, but will munch your drivetrain eventually.


BTW, I used to check rpm on tattle tails at the end of the track, and I could get it within a 100 by ear every time...Most hot 2.8 trucks, ran 3900to 4300. When we had a few hit 4700, it sounded like they were going to suck the hood in. The one that hit 5200, sounded like it broke. 5000 is a LOT of rpm.
 
The hi RPM helps with ground speed in the middle of the track where the sled isnt heavy yet ( dont need it in the peek tq range ) and have the right gear at the big end to keep her lit!!! I think???
 
In my experence it takes alot of high priced parts to build a motor that will last between the 6000-5000 rpm range. I leave the line at 6000 and at mid track at 5500. Only reason is for the ground speed. Scence i went to the dyno now i leave at 3800 and increase to 5000 because that is the peak power band.. EEP parts are in my motor...
 
that was one bad truck when it ran with full pull productions.
a couple guys are were tring it this year but no luck in doing the same

Calvin miller had a strong diesel that turned some rpm but drews part of that team i think also
 
i dont plan on going that high, i just wanted to know why. but there is alot of good info on here. the pulls around here are nothing like the ones in the mid west. i would like to leave around 4200-4400 and run the track around 35 or so
 
I run my vp 02 this past season, I run around 3200-3300rpms. One pull I stacked a buddies smarty on top of the edge and I ran right around 3650-3700 it made a huge difference.
 
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