I understand that the 4.7 limits revs by shutting off the fuel supply.
Is this correct?
If so how does the engine respond during full throttle power shifting?

Not that I'm going to be trying it... I just want to understand the rev limiter.

 

it dosnt shut the fuel off
it just cuts you to a limit,

like a bartender after a long night telling you "time to start taking it easy"

 

In other words the fuel is restricted to hold the engine at a predetermined RPM.

So you can run it up to red line, push in the clutch and the engine won't over-rev when you shift. Has anyone power shifted a 4.7 5-speed? The last time I power shifted a car was in 1966 when I had a Chevelle SS with a 327. You just had to be fast so it didn't over-rev back then.

 

i have powershifted it and it doesn't overrev... also, the max hp is made at 4800 rpms and going much higher than that doesn't really help out the truck at all... i usually shift at around 5k and let up on the accelerator so that the engine drops rpms a bit and i don't tear up my clutch or rear diff too bad (i desintigrated the rear diff LSD clutch pack doing a powershift into second so i try not to do it too often)

check out my youtube videos and you can see how i do it...

 

back in 66 eh?? nice car btw

my speedo says 97 when it cuts out but having taller tires then stock makes me able to go to 105mph WOOOOOOT!!!!!

and my rev limiter is at 6200 to 6500 i believe......not that i have gotten my truck to rev that high or anyhting....no

 

yea, like i said mine stopped at 95..i hadda been going triple digits, i have 265/70/16's.

 

I had the exact same truck as you magnethead and mine didn't cut out and I got to somewhere between 110-115.

It seems like it took an hour to get to that speed though hah.

 

Always shift at redline for maximum acceleration! Unless you drive a vehicle with an extremely narrow torque band, the advantage of a lower gear will always outweigh the diminished high RPM torque.

Redline in 2nd is still putting a significantly larger twist to the rear wheels than 4800 RPM or what have you in 3th.

 

i have the same tires as both of yall but can also do 110-115, maybe its cuz the V8 makes more power...

EDIT: and loud, how the **** does your truck get up to 6200 rpms? mine cuts off at like 5500 (where the engine won't go any faster)

 

265/70-16?

Mine pegged out at 4K and 95 MPH.

The transmission forces the issue at 4800.