Having an issue....

[webby]

Did they actually look at the filter, or replace it to confirm?

 

[trustdestruction]

What are you doing going WOT in 2nd gear @ 1,500 RPMs if you know how to drive manual? Downshift!

This is the root of the "problem". You should not be in 2nd+ gear at 1,500 RPM if you want to accelerate under WOT. Rev up 1st gear more before shifting to 2nd. 1st gear is the only gear that you should really ever be accelerating in at 1500 RPM, so you must be shifting too early/too much. 1500 RPM is hardly above idle.

 

[Monk]

I'm not saying the OP doesn't know how to shift/drive a ST......... There are ppl that can throw a baseball, or basketball...... but can they throw in the strike zone, or dunk it every time? ......... there are a lot of variances in using a ST tranny, and no matter how long they/we have been doing so doesn't mean we're good at it...... though a lot of people seem to think they can.......... The more ppl that recognize they aren't in the top ten drivers of the world, the better it is for them to accept input that may help them to improve their skills.

 

[Dragos]

I'm not saying the OP doesn't know how to shift/drive a ST......... There are ppl that can throw a baseball, or basketball...... but can they throw in the strike zone, or dunk it every time? ......... there are a lot of variances in using a ST tranny, and no matter how long they/we have been doing so doesn't mean we're good at it...... though a lot of people seem to think they can.......... The more ppl that recognize they aren't in the top ten drivers of the world, the better it is for them to accept input that may help them to improve their skills.

Some of the best in any field know that there is always room for improvement. The ones that think they know it all are just mediocre or worse, i know at least that's how it is in my professional domain.

 

[Monk]

OK....... This is how Honda has set my car up , because I just went for a drive, and purposely did a few Zero to what-ever( I was watching the tach )
have an automatic, so all I had to do was step on the throttle and listen to the rpms(had the music off), and watch the tach.
It went from idle to 4600 then went to the next gear, and went to 4100 before it shifted again, then about 4400 the next time.
So that's how Honda built it........ so I'd say 4000 to 4500 seems to be the magic shift area to get the best average performance ...........
I don't drive like that normally , If I were to want to get max acceleration I'd use D3 so it would hold to a higher rpm before changing to Drive.

 

[trustdestruction]

OK....... This is how Honda has set my car up , because I just went for a drive, and purposely did a few Zero to what-ever( I was watching the tach )
have an automatic, so all I had to do was step on the throttle and listen to the rpms(had the music off), and watch the tach.
It went from idle to 4600 then went to the next gear, and went to 4100 before it shifted again, then about 4400 the next time.
So that's how Honda built it........ so I'd say 4000 to 4500 seems to be the magic shift area to get the best average performance ...........
I don't drive like that normally , If I were to want to get max acceleration I'd use D3 so it would hold to a higher rpm before changing to Drive.

And for MT I believe the manual states shift points

EDIT: here it is. I will test on my way home at these speeds and monitor the RPMs

 

[Trentimus]

It's weird because the revvy nature of Honda motors helped make them famous..

 

[Monk]

trustdestruction ........... I've played with those charts on several cars and MC , and they are (as you'll find) set up for the minimal amount of rpm as not lug the engine, and it still feels like it's to low...... JMHO....... Let us know what you find this afternoon......

 

[Monk]

It's weird because the revvy nature of Honda motors helped make them famous..

You're absolutely correct in my opinion.......... I have been riding MC's for a long time(early 60's) and it took a few years , and a lot of information from talking to ppl that knew more than I did, to get me to use those higher ranges of the rpm's......... I am now of the belief that higher rpm's are better on the engine than the low lugging range, doesn't mean that driving around at 5000 "ALL" the time is good for it either. But it is made to be a high revving engine.

 

[trustdestruction]

Ok so here it is. Following Honda's "normal acceleration" shift points according to MPH, this is what I got with my 2012 Si sedan. Theses are approximate RPMs as it is difficult to drive and pay attention to exact RPMs, so they may be off plus or minus 0.1k RPM.

1st (17 MPH @ 3.8k RPM) to 2nd (resulting in 2.8k RPM)
2nd (29 MPH @ 4k RPM) to 3rd (resulting in 3k RPM)
3rd (37 MPH @ 3.6k RPM) to 4th (resulting in 2.7k RPM)
4th (43 MPH @ 3.2k RPM) to 5th (resulting in 2.5k RPM)
5th (49 MPH @ 2.7k RPM) to 6th (resulting in 2.2k RPM)

So, according to Honda's recommend normal acceleration shift points, you should never dip below ~2.7k RPM after 1st gear. Hitting 1.5k RPM and trying to accelerate heavily indicates that you are shifting way too early.

However, I was surprised how high the revs were during this acceleration. I definitely do not rev my engine to 3.5k-4k RPM during acceleration unless I am trying to accelerate faster than normal, because i'm normally stuck behind vehicles not wanting to accelerate quickly. Normally I would shift at around 3k RPM, but even so, this would put me nowhere near 1.5k RPM. If I am accelerating very slowly (as in I am driving in a slow area 20-25 MPH) then I may shift into 2nd and end up at 1.5k, but it doesn't feel bogged down because I am not putting much pressure on the pedal to accelerate to 20-25 MPH.

 

[Dragos]

It's weird because the revvy nature of Honda motors helped make them famous..

And practical, great performance with a bit above average price tag. Not to mention some of us may enjoy being RPM aware and shifting to be in the proper power band. My MC like high revving car is just as fast as cars twice the price and that's pretty cool for me.

 

[Jwilly]

Well y'all, regardless of my shift points, it looks as if it was in fact the dirty fuel filter that was causing the problem. And yes, regardless of anyone's experience, we all could use some pointers here and there. Thanks to everyone for your input!

 

[webby]

Did they actually look at the filter, or replace it to confirm?

^^

 

[trustdestruction]

Man a dirty fuel filter already? Crazy

 

[Jwilly]

^^

Yes Sir, it was confirmed and replaced.

 

[webby]

Yes Sir, it was confirmed and replaced.

and you can tell a big difference now... car is accelerating great now? What kind of gas have you been running? Brand/Octane rating?

 

[Jwilly]

and you can tell a big difference now... car is accelerating great now? What kind of gas have you been running? Brand/Octane rating?

Performance is MUCH better! I've been buying Mobil 93 octane gas. I've notified the manager of the location I get it from and he said they'd look in to it and get back to me. I doubt they will do a damn thing, but who knows.

 

[Monk]

Performance is MUCH better! I've been buying Mobil 93 octane gas. I've notified the manager of the location I get it from and he said they'd look in to it and get back to me. I doubt they will do a damn thing, but who knows.

Does that station have a high turn over of traffic, meaning do the ground tanks get refueled often ?

 

[Jwilly]

Does that station have a high turn over of traffic, meaning do the ground tanks get refueled often ?

No, it's located out in the country so not much traffic. I've started to just fuel up at the QT by my work. TONS more traffic through that station.

 

[None2Slow]

Remember, Don't fuel up if you see a tanker truck there. This stirs up all the crud in the tank and gets pumped into your tank.