foodkeeper

what happens when you floor the throttle lets say at 2,000 rpm? will you get better acceleration by gradually increasing the throttle while the rpm increases, or is acceleration better if you be at WOT even the rpms are low say 2,000rpm?

i mean when should you floor (WOT) the gas pedal, is there any general rule of thumb? should i wait, like at least 3000 or 3500rpm to floor it?

Thanks
John

element600rr

all depends on the amount of traction you have .. my car spins bad in 1st and 2nd so i tend to feather the gas to gain better acceleration from low rpm start ..

foodkeeper

umm, lets say it doesnt spin. is it good to WOT at lets say 2,000 rpms? or does it make the car slower? when you floor the gas pedal at low rpms doesnt it drown the engine with fuel?

mouab18c1

iTrader: (5)

Pedal to the metal.

BryanM.

iTrader: (1)

Floor it.

foodkeeper

would it be better to floor it right away even at 2k rpm?

pwebb0207

what about a down shift?

BryanM.

iTrader: (1)

He better be talking about 1st gear.

foodkeeper

yes im talking about 1st gear. can someone explain?

raverx3m

iTrader: (1)

you get detonation if you have LS motor lol.
in second gear and above.

TunerN00b

Does your car have a carburetor?

These types of questions should have died off with modern fuel injection and electronic ignition. Mash the gas, let the computer figure it out, and unless you have a bad tune, it will.

raverx3m

iTrader: (1)

ls also doesnt have knock sensor. so it will choke on lower RPM like both of my LS motors did.
add to that worn out rings/plugs/wires/clogged fuel filter/crapy fuel incorrect ignition timing
,I/H/E without tuning etc and you got a nice deep WRX sound when you try to smash on low RPMs.


vtec motors have knock sensor so they will pause and think about it for a second and then adjust the timing.


i think i got it right anyone can confirm/correct me?

TunerN00b

The choking your attempting to describe is generally referred to as "lugging the engine", and the danger of such is high stress on the rods and crank with low oil pressure.

Due to modern electronic ignition timing going off of more than just rpm and vacuum (all an old skool carbureted engine had), the engine should not be at detonation risk from lugging it, but it isn't exactly good for the engine either.

Knock sensors not needed here, and you can lug an engine with one.

raverx3m

iTrader: (1)

because i know for sure i can "lug" both of my LS engines
but b16 theres a pause when i floor it on low RPM and it adjusts the timing and ignition and then accelerates normally.

gsr too unless its because of rod ratio that its not so apparent as LS motor.

GagnarTheUnruly

iTrader: (3)

My GS-R never lugged like my CR-V does. Now there's no knock sensor but I haven't driven up grades like that.

What specifically cuases that to happen?

TunerN00b

Get the car moving at around 10 mph, put it in 4th, floor it, it will lug.

I've read several theories, and everything from the stress forcing the oil film out of bearings causing metal to metal contact to harmonics have been blamed.

Many (but not all) diesel engines can be lugged without fear of damage.

If there is an authoritative answer, I have yet to find it.

Either way, you're subjecting the engine to high loads with minimal oil pressure and flow from the low revs.

I do know that when it does happen, the engine bucks in the bay, which is probably what the driver feels.