Auto tranny shift points
03-31-2003, 08:46 PM
#12
Guest
Posts: n/a
Re:Auto tranny shift points
my non-vtec accord used to do it to...made a little nois like vtec too.....someone told me it was just a resonance in the intake or something. Dont be affraid to stay on the gas...if it shifts high its meant to do it, my accord used to shift at like 7k ( i hate autos)
04-01-2003, 09:04 AM
#13
3.0 BAR
Join Date: Feb 2003
Posts: 9,089
Re:Auto tranny shift points
Originally Posted by phresh_5
Ok I know this is gonna sound stupid but if anyone else that has a auto civic can back me up on this. Some where in the range of 4500-5500RPM my NON-VTEC lunges forward. Its not huge but still noticable. Anybody else notice this?
thats the idea behind the VTEC system, two sweet spots, one with the normal cam and one with the secondary
04-01-2003, 11:34 AM
#15
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Join Date: Feb 2003
Posts: 9,089
Re:Auto tranny shift points
no, each cam has its own vtec.
one picks up when the other starts to fall off.
vtec switchover is where the two tourqe lines cross. to tune a vtec engine you turn the vtec point to 8000, ,get as much power as u can with the low cam, then change it to 2000 and do the same with the high came then set the point at where the dyno lines cross.
one picks up when the other starts to fall off.
vtec switchover is where the two tourqe lines cross. to tune a vtec engine you turn the vtec point to 8000, ,get as much power as u can with the low cam, then change it to 2000 and do the same with the high came then set the point at where the dyno lines cross.
04-04-2003, 09:43 AM
#18
0.5 BAR
Join Date: Feb 2003
Posts: 170
Re:Auto tranny shift points
I drive a 92 civic lx automatic tranny and I know the car and tranny like the back of my hand.
ok, this guy is 80% right:
"every automatic car i;ve driven shifts like this. when your easy on it, it shifts somewhere conservative like 3000, i guess its for fuel economy and engine longevity. but when u mash the pedal to the floor, it shifts at redline."
true, exceptfor it will shift a couple 100 rpms before redline.
2. that 4500-5500 rpm range is the car's sweet spot and that is why you feel and bit more power there.
I hold the gears down and shift at 7000 rpm (mind you, my chip has been modified to 8000 but i never go there) but prior to that, I've shifted at 6700 rpm going from 1 to 2 to d3 to d4 (if necesary) with relative ease...i've never slamed the brakes and revved to 3k at launch, i always thought that that might mess up the brakes or a few parts in the drivetrain. 2k i've done...
hope i've helped you in some way.
-chris
ok, this guy is 80% right:
"every automatic car i;ve driven shifts like this. when your easy on it, it shifts somewhere conservative like 3000, i guess its for fuel economy and engine longevity. but when u mash the pedal to the floor, it shifts at redline."
true, exceptfor it will shift a couple 100 rpms before redline.
2. that 4500-5500 rpm range is the car's sweet spot and that is why you feel and bit more power there.
I hold the gears down and shift at 7000 rpm (mind you, my chip has been modified to 8000 but i never go there) but prior to that, I've shifted at 6700 rpm going from 1 to 2 to d3 to d4 (if necesary) with relative ease...i've never slamed the brakes and revved to 3k at launch, i always thought that that might mess up the brakes or a few parts in the drivetrain. 2k i've done...
hope i've helped you in some way.
-chris
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