Acceleration Questions

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Old Jan 4, 2006 | 06:11 PM
  #11  
Double-Trinity's Avatar
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Default Re: Acceleration Questions

I use the HCH-1, I'll accelerate at about 2000-2200. That seems to be the efficiency sweetspot for the engine, as the CVT tries its best to hold the engine there where possible. Also, if I'm coming from a red light, and about to go into a downhill, the best strategy seems to be to accelerate quickly, then cut the throttle and let gravity work, rather than accelerating gradually and burning gas much of the way down.

One situation where fast acceleration is definitely best is just before a hill climb from a stop. If you have a straightaway, is to use as much acceleration as necessary to get up to speed, or slightly faster than your ultimate desired speed, before getting onto the incline, then allow it to slowly bleed off as you go up. That seems to be much better than not being at speed and having to accelerate while one the incline, which will usually force you way past the engine's efficient RPM range for a long time.
 
Old Jan 4, 2006 | 07:03 PM
  #12  
NASAgineer's Avatar
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From: San Jose, CA
Default Re: Acceleration Questions

Originally Posted by tbaleno
I'm starting to be converted. I pretty much used the 2000RPM rule on the way home when I had at least a 1/4 mile until the next stop sign to allow me to get up to speed and hold it for a little bit. It seemed to work out. Hard to say though.
I'll be interested to hear your results. It's not a hard-n-fast rule, more of a guideline that has to be adapted to the circumstances, as double-trinity pointed out. When I'm city driving, I always try to plan ahead, predicting where my next forced slow/stopping point will be. Then I try to accelerate so that I'll spend most of it in cruise and/or glide, but without exceeding 2500 RPM (usually 2000 unless that would cause me to hold up traffic).
 
Old Jan 4, 2006 | 08:38 PM
  #13  
tbaleno's Avatar
Joined: Dec 2004
Posts: 2,161
From: Leominster, MA
Default Re: Acceleration Questions

I pretty much do what you do. My acceleration RPMS were generaly between 1200 and 1500 (depending on how flat or sloped the road was).
 
Old Jan 4, 2006 | 09:15 PM
  #14  
philmcneal's Avatar
04 prius 350,000km
Joined: Sep 2005
Posts: 517
Default Re: Acceleration Questions

Originally Posted by tbaleno
I'm starting to be converted. I pretty much used the 2000RPM rule on the way home when I had at least a 1/4 mile until the next stop sign to allow me to get up to speed and hold it for a little bit. It seemed to work out. Hard to say though.
**** straight! I believe all hondas are tuned so that 2000 RPMS will always be the sweet spot, its just purrs so nicely at that speed. That's how I get $18cnd fill ups when my gas gauge shows its half/full empty. But I blame it all on bad weather at the moment. Its a personality trait that Honda has established on all their cars.

Phil (17km/L) last tank (tires at 48 psi front 45 back no spare, might get one...)
 

Last edited by philmcneal; Jan 4, 2006 at 09:55 PM.
Old Jan 5, 2006 | 09:40 AM
  #15  
Hot_Georgia_2004's Avatar
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From: Atlanta, Ga
Default Re: Acceleration Questions

If there's nobody behind I'll accelerate from a stop surfing the edge to keep Assist barely on until about 30MPH, then back off to 60MPG and accelerate from there, given a fairly level surface.

Most of the hills in my area are staircased- A fairly level area leads to a hill, then to another flat area then another hill...either going up or down.

If a stop sign begins one of these staircases I'll accelerate at a fairly good pace while on the level, and hold my accumulated speed up the hill until the next level area where I'll accelerate again to the next uphill, where I'll hold it again. Whenever possible I don't accelerate on hills.

Once up to speed I drive with the load and maximize any downhill opportunity.

The one and only time I use the RPM gauge is before shutting down for FAS, where I make sure it drops to ~800RPM before shutting down to avoid the ping of unburned gasses igniting in my exhaust system upon restart.
 

Last edited by Hot_Georgia_2004; Jan 5, 2006 at 09:43 AM.
Old Jan 5, 2006 | 11:59 AM
  #16  
tbaleno's Avatar
Joined: Dec 2004
Posts: 2,161
From: Leominster, MA
Default Re: Acceleration Questions

arrg. Today I only got 45mpg More testing needed I think.
 
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