redline isnt at 6300 anymore

[bboipinoy112]

while i took off on this deserted road. i wanted to see how far i can take it redlining in 1st gear and it went WELL past 6300. i shifted at 6600 and it looked like and sounded like it could go more. but i didnt want to risk it. at 6300rpms. it drops to about 4200rpms when shift in 1st, but when i shifted at 6600, it droped to 4500rpms. i dont know if it does me any good. since about a month ago it wasnt able to go past 6200rpms. but ever since ive been going to the track everywednesday, it has been sneaking past 6300rpms everytime. same as for my friends 00prelude. he is able to shift past or at 8k rpms due to agressive driving. do you think it is better for my car to do that? or what?. any inputs about what is going on would be nice. thanks -junior-

[adams86lxi]

the a20s maximum hp is at 5500rpms so going past it isnt really any benefit other then losing hp. I would shift at redline so when you shift to the next gear you are closer to your maximum hp 5500.

[Elijah]

5500 is supposed to be peak hp. but I take mine right up to 7200 and thats when I feel it start to lose power.but I'am not stalk either.

[Justin86]

Well actually the power curve stops to drop big time after redline, so the only reving that high will help is if you have a custom cam or spraying.

[bboipinoy112]

k thanks. ok. another question. why is it going way past redline now ?

[wikkedv15]

lol.. maybe u just never noticed it going that high before.. or.. ur tach is losing its accuracy.. in any event.. i can slam 6,600rpm as well.. in all gears.. yes it does help bring the next gear into the power band..
i dunno.. i mean every says theres no point but.. someone needs to do this on the track..
shift at 5,500rpm then run again shifting at 6,500rpm..

[bboipinoy112]

naw. i have noticed it . after going to the track lately and redlining it all the time. it always cuts of at 6300. but now . it can just fly past 6300 and hit 6800. i check again earlier this afternoon. but it does help going past 6300 at the tracks. im hitting mid-16s constantly. 16.6, 16.7s stock. well almost .. just short ram intake. =\

[wikkedv15]

haha yeh the reason it helps is because the next gear is already at a higher rpm.. but then again lack of mods and time getting their(6,800rpm) makes it contradictory.. so dont hit 6,800 so much.. try to lower it.. like 6,500..
the way i race.. and its not the greatest for the car but its effective..
basiclly my foot never comes off the gas..
u gotta be darn good at slamming gears so u dont hit the rev limiter..
if ur quick.. when u shift ur rpms will only hit 6,800 or so if ur shifting at 6,400-500
keeps the revs up so they dont drop..
now im not saying keep ur foot at WOT lol.. but u get the idea..

side note.. why arnt u on AIM anymore.. lol

[dXsquared]

my car pulls hard to 6800

Travis

[wikkedv15]

thats cause of ur weight redu.. "boink" lol hahah

[smufguy]

rule of thumb, unless you have any internal engine mods, like cams, or timing, or valves or pistons or whatever done to your motor, your motor's revlimit stays put!! having an aftermarket exhaust or an intake or a fuel pump or regulator or what not aint gonna move ur redline any further. You are still using your stock intake manifold :rolleyes: . I am not saying YOU when i say you, i just mean it in a general sense. So yeah, gettin to the point, its just a waste of your time and ruining your motor basically. if you look at the dyno curve, the hp falls pretty steep than it takes to rise up. So u are not getting anything after the peak pwr which is 5500rpm. You might FEEl it pull, but it aint and thats not the right way to shift either. :thumbdown

[wikkedv15]

learn something knew everyday ey.. well.. even though im sure ur right.. id still like this track tested.. shifting at 5,500rpm and shifting at 6,500rpm.. bboi should be the guniea pig hahah

[smufguy]

well no matter what, it wont be the same. All depends on the accuracy of the timer. the wind, the tire slip, the traction as a whole and most importantly your reaction timing. So yeah, it would be a little hard to tell, unless they are interpolated.

[bboipinoy112]

jeez. u guys are harsh . lol . jk but thanks for the input. ill be shifting at redline everytime now. maybe a bit more just stay up on da band.

[BensAccordLxi]

Well, I'm looking at my Dyno graph from when I had Intake, muffler, MSD 6a, MSD SS coil, and MSD wires. My LX-i held it's max power from 5,200-6,000RPM's It started sagging after 6. The graph after the header and cam the power band moved to 5,500-6,400 RPM's. The rev limiter is 6,800 so I usualy shifted at 6,500. I ran faster times when I shifted at 6,000 in first and then 6,500 in second.

[smufguy]

Well, I'm looking at my Dyno graph from when I had Intake, muffler, MSD 6a, MSD SS coil, and MSD wires. My LX-i held it's max power from 5,200-6,000RPM's It started sagging after 6. The graph after the header and cam the power band moved to 5,500-6,400 RPM's. The rev limiter is 6,800 so I usualy shifted at 6,500. I ran faster times when I shifted at 6,000 in first and then 6,500 in second.

well having a multiple spark or staggerd spark would increase pwr due to better flame propagation and increased time for the combustion stroke. i dont know how the digital ignitions advance and retard the timing, but all i know is they cut off spark at whatever engine rpm you want and they all mostly start around 6. IS your distributor itself advanced on the ignition timing at all?

From experience with full exhaust and a CAI and fuel pressure at 43psi, i dont pull hard after 6, to be honest it does not pull at all. but thats my experience :) we have to see what a turbo can do ;)

[johndej]

lol, the "redline" is a recomended point that you shouldn't go past because you risk damaging the motor. you can take you car as high as you want (untill the limiter kicks in) and it won't really do you any good unless you have mods to support it. as stated before our peak rpm is at like 5500 and the only point in going past that is so that when you shift up, you land closer too it then before.

[wikkedv15]

thats what i meant john.. u have to find that point were ur not slowing the car down by revving to high.. but ur revving high enough so that the next gear is you land closer to it then before..
eh.. prelude tranny would be a good as mod ey.. lol

[Magny]

bboipinoy112 what track you go to, I have been wanting to take mine there for some time now, but I don't know where they are and when they opened. How much does it cost to run anyways???

[Morpheus]

your valvetrain is only so strong.

[racerx]

Okay, here's the deal with redlines: You want to stay in as high (in horsepower) as you can, for as long as you can. In other words, you want your AVERAGE horsepower over whatever range of RPM's to be the highest possible. Look at the picture, and I'll explain more below:

http://images.cardomain.com/member_images/6/web/558000-558999/558113_14_full.jpg

this is a very rough drawing here, but it should give you an idea.
the red tick mark on the RPM scale is the redline.

the top picture is shifting at 6300, and it stays consistantly above 90HP.
the second picture starts at about 100 and ends at 80.
it would be my guess that they would be close in average power, but the top would be greater.
the third pic would definately be lower in power because it get's down to 75HP in the beginning.

if anyone has a real DYNO chart, I can find a function to express HP over RPM, and with that I can make an equation to find average value of the function. And thus your average horsepower.
it would be something like this:
1/2 (integral) a to b, of f(x) dx, where f(x) represents horsepower over RPM, b = shift RPM, a = RPM after shift.

anyone have the f(x) part? that's all i need and i can make charts for everyone.