Disappointing time. It will improve.

njhustler

njhustler

Well-Known Member
385
165
New Jersey
Vehicle Model
Civic Si
Body Style
Sedan
Ok so a couple of weeks back , I finally got to run my SI down the quarter mile. I was excited and figured I would run a 14.9-15.1. Unfortunately I was wrong and ran a 15.8 and a 15.7. It really bothered me to run such a bad time , but I got over it figuring it was my first time at the drags with the car. I went again tonite and got in 2 runs. 1st run was a 15.3 @ 89.97 and my second run was a 15.8 @87.80 mph. The second run it felt like the car was struggling. I guess I will keep going and improve my time , whether it be by driving it better or buying upgrades. Only mod is K&N intake. Seems like its kinda hard being consistent in this car. Please analyze the slips and feel free to give advice on how I can improve. Im 817 and 8110.
 

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Did you do anything with your tire pressure, or weight reduction? Full spare in the trunk, jack, full tank of gas etc? Temp/humidity at the track? Elevation of the track can also play a big part. Did you have the rpm's at a certain level and dump the clutch?
 
What I see most of the time is people launching the car at too high of an RPM, you only need about 2000 - 2500RPM at launch, much more and you will kill your time with excessive wheel spin. Also I have noticed these cars do not like the heat, I have seen a difference in performance depending on temp and humidity.
 
webby said:
Did you do anything with your tire pressure, or weight reduction? Full spare in the trunk, jack, full tank of gas etc? Temp/humidity at the track? Elevation of the track can also play a big part. Did you have the rpm's at a certain level and dump the clutch?
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This time around I had a full tank of gas , speaker box and amp in the trunk. I did however drop my front tire pressure about 5 psi , but the tpms went off and I put it back to norm. First run yes , second run no. It was about 70 deg last nite with little humidity. Not sure of the elevation but it cant be high enough to effect my times.
 
UNCG34 said:
What I see most of the time is people launching the car at too high of an RPM, you only need about 2000 - 2500RPM at launch, much more and you will kill your time with excessive wheel spin. Also I have noticed these cars do not like the heat, I have seen a difference in performance depending on temp and humidity.
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I tried the 2000-2500 rpm lauch the first time at the track , I saw some guy on autoweek or motorweek say he had gotten his best time launching at 2200 rpms. I plan on going back next wednesday , hopefully I can do better or at least stay consistent so I can bracket race.
 
A full tank of gas will run like 80lbs of weight. Every hundred lbs usually equates to a tenth in the quarter. Sub/amp could add a lot of weight depending on your box.
 
It definitely could've been the weight added and the full tank of gas.

1 gallon of gasoline = ~6lbs.

If the gas tank was 50%, the car would have been around ~40lbs lighter. Or ~60lbs at 25%.
 
I will try to get under 3100 pounds for my next time at the track. I'm going to remove the box , amp and spare tire. That plus maybe a half - quarter tank of gas should do it. I would love to get 14.9 with just the intake , but honestly I dont think she can do it without more mods. I know some people have run that stock , chime in and let me know how you did it.
 
njhustler said:
I will try to get under 3100 pounds for my next time at the track. I'm going to remove the box , amp and spare tire. That plus maybe a half - quarter tank of gas should do it. I would love to get 14.9 with just the intake , but honestly I dont think she can do it without more mods. I know some people have run that stock , chime in and let me know how you did it.
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I know from experience that a box and subs will slow you down tremendously
 
I would agree. The box is about 40-50 pounds. I will
make sure to remove it when i go again on Wednesday.
 
Some people achieve quicker times by power shifting. (Keeping the gas floored even while depressing the clutch/ shifting). You'll improve times, but I wouldn't advise it
 
My friend told me the same thing. I'm a little iffy about doing it though. I think I did a little on my 15.3 run. I videoed my runs with my iphone. Lol I stuffed it in my gps holder and filmed it from there. I will upload soon.
 
Thanks , I kinda expected a little more out of the car. Seems like too much mid-range torque and not enough top end.
 
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Honestly, compared to my own Si, yours doesn't seem to pull as well up top. I have kept my intake system stock, just use a K&N drop in filter. When I lay into the gas, it pulls best above 5000RPM and keeps gaining power up to 6800 - 7000RPM. Could you be getting heat soak from the intake?
 
UNCG34 said:
Honestly, compared to my own Si, yours doesn't seem to pull as well up top. I have kept my intake system stock, just use a K&N drop in filter. When I lay into the gas, it pulls best above 5000RPM and keeps gaining power up to 6800 - 7000RPM. Could you be getting heat soak from the intake?
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No heat soak can really happen with the stock intakes. You can try to do the resonator delete though to get rid of the wanted restriction so you can get a better mid range to peak hp.
 
Dar-Dar said:
No heat soak can really happen with the stock intakes. You can try to do the resonator delete though to get rid of the wanted restriction so you can get a better mid range to peak hp.
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This is what I am saying, my car seems to pull better up top than njhustler, I am running stock intake with an K&N drop in, hence no heat soak, wondering if his K&N intake may be causing some heat soak issues. I have noticed that this engine doesn't pull as well when it is really hot out.
 
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