Go send your car for dyno testing and find out when your max
horsepower come in. If lets say it come at 5000 rpm and your
redline is 6500 rpm, no point dragging it to redline also
wat.
If lets say the dip in horsepower after 5000 rpm is VERY SHARP, for
e.g at 5000 rpm your car pushing 130 bhp, then after that drop
sharply to 100bhp at 5500, then you shouldn't drag over 5000.
If the dip in horsepower is only very minimal, you might consider
dragging higher a bit so that when you change gear, you are still
within a good power band for the next gear (ie heading strongly
towards your max power)
E.g.
4000 rpm : 105 bhp
4500 rpm : 120 bhp
5000 rpm : 130 bhp
5500 rpm : 125 bhp
6000 rpm : 100 bhp
Just as a example, lets say this fella racing his car. Max bhp is
130 at 5000 rpm. Lets assume when he change gear, it drops around
1000 rpm. So if he drag to 5000 rpm and change gear, it will drop
to 4000 rpm the next gear. From 130 bhp drop to 105 then start to
climb again. He fell out of the power band as his car make power at
around 4500 rpm only.
If he changed his style and shifted at 5500 instead, although it
drops to 125 bhp at 5500, he will land at 4500 rpm in the next gear
which is 120 bhp and keeping within the power band.
This is just an extreme example. Actually got many diff arguments
but this is what I gather. Pls correct me if I'm wrong.
Anyway, most cars have rev limiter, it should cut you off before
the redline. For those modified civics (original redline is 8200
for the old DOHC VTECs), revving to 10,500 also engine should be
able to tahan. Highest I've seen is 12,000 rpm but after that
engine got problem.
But of coz dragging 1st and mebe 2nd gear to 10,500 is "OK", but if
higher gear revving to 10,500, engine may not tahan cuz it stays
there much longer. 1st and 2nd is 'fast-fast job'. Rev there,
change gear. 3rd still bearable. Later gears take so long to climb
that your engine may not tahan revving so long at such high
rpms.
