| nsl |
| Just wondered what the normal engine RPM's should be for the transmission shift points under normal driving. I seem to be shifting out of 1st gear at about 4000 RPM's under what I consider pretty gentle acelleration from a stop. If I really baby it it shifts out of 1st at about 3000-3500 rpms. Does this sound normal. 4000 rpm's seem a bit high to me. |
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| dipersp |
Same here, I've ALWAYS had this complaint. Others have also mentioned it in other threads.
It's been mentioned it helps things "warm up." If that's true, that sucks, even if it is for emissions. I live on a 25mph street with a LOT of kids that's barely wide enough for 2 cars to pass. Going up the street, I keep it between 20 and 25 and sit at 3-4k the entire time. SOUNDS a lot faster. |
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| CTPYHA |
I would not worry about it. At first I had same problem. I came from stick shift world and it drove me crazy that car does not shift at 3000 rpm. I use to do it manually unless I needed more power. Here is a link to a tread I started when I bought the car:
http://www.acuramdx.org/forums/show...ud+engine+sound
But I specifically went to a dealer and drove two other MDXes. With one of them I even did side by side comparison. I literally was able to take my car and the other one to a side street behind dealership. And there I was driving them couple of times one after another for a comparison. I found that they switch gears and act exactly the same.
After a little while I learned to be easier on acceleration pedal. I know it sounds hard now, but you can learn to do it... and still enjoy your X.
:2: |
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| CTPYHA |
dipersp,
there is a little trick that may help with 3-4K RPM issue. After you reach 20Mph, or what ever speed you need, release accelerator pedal for half a second. Transmission "thinks", that you a slowing down and will switch to next gear. Your RPM's will lower to about 1500. It's a little trick I learned while looking for a solution with "manual shifting".
:26: |
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| dipersp |
I'll keep that in mind - thanks!
Wish we could really get into the computers on these cars and program them to do what we want! |
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| cvyluv |
| Speak for yourself!! I'll leave it to the guys who know what they are doing!!! :) :) :) :) :) |
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| shootist |
quote:
Originally posted by nsl
I seem to be shifting out of 1st gear at about 4000 RPM's under what I consider pretty gentle acelleration from a stop.
This should only be happening when the engine is stone cold. It happens to me (on both the 03 and 05) when I leave the driveway, and when I start up from the next stop sign 1/4 mile away. By the time I'm in town (1 mile further) it shifts normally and gently at 3k or less.
Yes, the programming is there to assist in warm up of a stone cold engine.
If it is happening at every first to second shift, you have a problem. I bet it's only that first one or two in the morning, right? |
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| mdxx3 |
quote:
Originally posted by dipersp
I'll keep that in mind - thanks!
Wish we could really get into the computers on these cars and program them to do what we want!
Ok, lets reprogram it to shift at 6K RPM (or maybe 5+ K RPM at the top of the curve). VTEC motors are supposed to rev high!! :2: |
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| jamchen |
well,,, i personally think that high rev at 1st gear is actually to have higher torque out... maybe i am wrong (correct me if i am) coz i remember that i read an article on comparison among X5, RX330, ML350 and X, it stated " the MDX has the highest RPM among these cars when started, which makes the V6 feel like V8 :D
i actually found that a way to get lower shift point.... i always step a little hard when started until it reaches like 35 to 40km/h and i will lift my feet on the gas just enough to maintain the speed, and i do always able to have the shift point t around 3000rpm.... dunno if it helps... maybe Xs down here is different to up there!!!!:p |
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| G. COLTON |
Unless I have "my foot in the carburator" the X always shifts at 3,000 to 3,300 on the first shift. Doesn't matter if the first shift of the day or last. Of course I am not in real cold weather either here is LA (Lower Alabama).
G |
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| Jin_Chris |
my 04 X does the same thing as G.Colton's. Regardless of the weather, the **** point seems around 3000~3500(3300) RPM.
Here I am in "MICHIGAN". Yup!, again Michigan. I see about 6 inch snow evenly covering up my yard now..... |
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| CTPYHA |
Guys, it's not a difference in the car, it's how you drive it. What one calls "my foot on carburetor" another calls "barely pushing accelerator" :rolleyes:
Like I said - I tried three different MDXes, two 04's and one 05. They all response the same. They all shifted around 4000 rpm. That's when I learned it's not the car, it's a driving habit. Now, two months later my X shifts around 3200-3500. I bet in another month it will be around 3000. :2: |
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| mhartwell |
I don't have much of an update from the last post where we gained 28whp on my '04 MDX by hacking the ecu, installing less restrictive exhaust and intake. Since then, I've been spending a lot of time on the Forester (now pushing 400hp+ at the wheels) and the boys really got into the Chevelle over the holidays - have a whole new radius groove belt drive on the front now. I know, I know....alien language to some.
On the last MDX tune, I changed the first shift point to 6200 rpm - much farther and the curve falls dramatically (nothing a turbo can't fix but not there yet). I hope to be able to devote a good bit of Feb to the MDX. We now have a piping scheme for the turbo and I have designed some of the brackets. I'll have them made out of billet aluminum. I know a guy in CO that does lots of custom stuff for the aircraft industry. His shop is spotless and he has the best of everything. He's made a few Harley parts for me in the past (my designs were bought by "big name" aftermarket company at 1998 Daytona), so the brackets and such will be a breeze for him to crank out. I'm just having a whale of a time getting them right because I'm designing the old fashioned way - iso paper and sharp Faber - entirely too much fun when dealing with 3D angles. But I want to minimize the number of bolts and fasteners - best way is to attack it at the bracket design phase.
Oh well, back to funville.....
Best,
Mike H. |
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