The Si's power figures are underrated

PowerPerLiter

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I believe what the OP experienced was accidentally holding down the cruise control button, something I accidentally did once while driving and it made me think I broke something
Yeah some clarity on that would be good. Sounds like for you it was the afr readout. Does ktuner do the live afr readout too?
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xbbnx

xbbnx

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If this car has rev hang delete, than in essence it is tuned. Assuming he is tuned with TSP Stage 1 and is using Map 1 (have not watched the video because I'm suppose to be "working"), although it uses factory boost levels, there are some throttle enhancements, so the title of the video is misleading. Just nitpicking :)
Nitpicking I think but ok I'll bite..here's another stock no rev hang delete or tune still pulling 14.5 on the 1/4 mile albeit a lesser trap speed.

 

amirza786

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Yeah some clarity on that would be good. Sounds like for you it was the afr readout. Does ktuner do the live afr readout too?
Only if you have Ktuner plugged in and are logging using a tablet or laptop. I think what happened in this case was he went into Map switching mode, which puts the RPM gage on 1, 2, 3 (looking like it's broken), and if you hit the up/down key it will look like it's going crazy. I will go back and re-read his first post, but I think this is what happened to him
 

gtman

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Only if you have Ktuner plugged in and are logging using a tablet or laptop. I think what happened in this case was he went into Map switching mode, which puts the RPM gage on 1, 2, 3 (looking like it's broken), and if you hit the up/down key it will look like it's going crazy. I will go back and re-read his first post, but I think this is what happened to him
Well...

If you are referring to xbbnx, probably not because I'm pretty sure he, like PowerPerLiter, had Hondata (no cc map switching). :cool:
 
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amirza786

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Well...

If you are referring to xbbnx, probably not because I'm pretty sure he had Hondata (no cc map switching). :cool:
OK, than that is a different issue. It's possible he was experiencing clutch slip? I've heard other members mentioning the RPM's gage going up but not their speed when in 5th and 6th gears, especially when using maps that boost above 22 psi
 


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OK, than that is a different issue. It's possible he was experiencing clutch slip? I've heard other members mentioning the RPM's gage going up but not their speed when in 5th and 6th gears, especially when using maps that boost above 22 psi
Definitely wasnt clutch slip. The rpms were bouncing too fast all over the place from one end of the rpm range to the other..this happened at free way speeds while trying to apply my cruise control so I'm sure it has something to do with what @rive said.
 

fiend busa

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Remember, 205 is at the crank, TSP rated a 2017 at 182 at the wheels stock. You could plus or minus a few hp. As far as the GTI, it just is faster, I've seen a few comparisons, including one from the Straight Pipes. But to be fair it's also priced at a higher price point. And is not nearly as reliable.

The Si is not a fast car, at least in it's factory configuration, but it's also not slow and competes fairly well with it's competitors. A tune helps it getting there. Now if you ever get a chance to sit behind the wheel of a Type R... that's fast
I wasnt impressed with the Type R speed stock when I traded in my Si (was running TSP Stage 1) except for how it kept on pulling to redline.

Though once the R was tuned....different story haha.
 

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Definitely wasnt clutch slip. The rpms were bouncing too fast all over the place from one end of the rpm range to the other..this happened at free way speeds while trying to apply my cruise control so I'm sure it has something to do with what @rive said.
Yeah, now remember...the Half-Life joke
 

Amazon

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That's a stock Si making close to those numbers. Quater mile in 14.502 @ 98.35 MPH :dunno:
It wasn't a stock run, regardless of what the poster claims, lying about modifications and tunes in the car scene is rampant and I'm not at all surprised that he disabled comments for that video. Just a glance at his other videos indicate him to be a fairly competent drag racer, though 60' could use improvement. So the fact that he runs the same times tuned on TSP/KTuner is pretty good indication that he isn't being truthful or is unaware as to what the map he installed actually did to boost levels.

So either TSP/Ktuner maps don't make any power, or the uploader lied/was confused as to what tune he loaded to simply delete rev hang. You decide.
 
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xbbnx

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So either TSP/Ktuner maps don't make any power, or the uploader lied/was confused as to what tune he loaded to simply delete rev hang. You decide.
I posted another vid of him running 14.5 sec without a tune/rev hang delete. I've seen others run 14.5 secs as well, though never lower than that stock. Seems to be the best time on a stock Si, in perfect conditions with a good lauch and traction.
 


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I posted another vid of him running 14.5 sec without a tune/rev hang delete. I've seen others run 14.5 secs as well, though never lower than that stock. Seems to be the best time on a stock Si, in perfect conditions with a good lauch and traction.
Trap speed lets us know how much power a car is making. ET is just how well you are putting the power down.

98.3 MPH traps is on par with tuned cars. Well, base maps at least.
 
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Trap speed lets us know how much power a car is making. ET is just how well you are putting the power down.

98.3 MPH traps is on par with tuned cars. Well, base maps at least.
Alex on Autos has also trapped 98 Mph in his 2018 Si review :dunno:

Honda Civic 10th gen The Si's power figures are underrated Screenshot_2020-03-18-19-19-17
 

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Alex is using a 20Hz GPS accelerometer to gauge his 1/4 mile which isn't going to be very accurate just from personal experience and research. Do yourself a favor and go to a drag strip to see how fast your car really is, if your car is really making 200-205whp we will all expect a 100mph trap speed and a low 14 sec pass!
 

FC3L15B7

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2 examples why...

I was merging unto the freeway about three days ago in 4th gear going about 50 MPH, there was a Semi already on the freeway in the farthest right slowest lane. Not wanting to be stuck behind him, I stepped on it still in 4th gear, I swear the sensation of speed as I merged in front of the semi was breath taking. I was shoved back in my seat and by the time I looked down I was going about 95 MPH without even realizing it. Very underrated.

2nd reason..

I was cruising on the freeway and a GTI pulled up next to me, looked like a 2015-2017 model year GTI. I knew what was about to happen so I gunned it about the same time he did, we were pretty much neck and neck from 60-85MPH, this is a car that makes 220 hp and 258 lb ft of torque how was that possible?

I know dynos have shown that all the Civic engines are underrated by Honda, for what reason? I dont know. But it is true, the Si engine is a little monster.
I said awhile ago I saw a dyno chart that was putting WHP to the ground at the BHP rates offered by Honda. I coudn't find the data, but no one seems to know. I'm pretty sure it's true - the BHP rating is actually at the wheels.

Reason? Insurance.
 

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Reason? Insurance.
Reasonable theory, though I really wish I had a better grasp of how something like HP rating impacts my insurance. I've never really understood how insurance companies calculate premiums. I get that they consider a number of driver factors: age, gender, accident history, etcetera...and certain aspects of the particular vehicle as well: safety ratings, likelihood of theft, body style (coupe vs sedan), color, among others. But how does HP actually impact the calculus? If the Si had been rated at, say, 215 bhp instead of 205 - would that translate to a noticeable premium bump? Is there a secret "power table" with discrete tiers for different ratings? If the difference in HP ratings only translated to a difference of a few bucks, I'm not sure why Honda would even care.

Do we have any insurance experts in here? If so, care to share a peek behind the curtain?
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