8th Generation Honda Civic Forum - View Single Post

***Sirbelch*** · 05-07-2008, 08:31 PM

Lx + HFP > Si especially on an auto x course.

The thing about an auto x course is, it’s too slow for the Si to always be in VTEC. 15-60 mph is about the range of speed on an auto x course. The Si will hardly get out of 2nd gear on most auto x courses. So anything below 37 mph, the Si will be off the big cam at which point the power difference between the Lx and Si is negated by the weight difference. Furthermore, the Lx is only down 10 lbs ft of torque to the Si and its torque peak is 1800 rpm lower than the Si. If you do a torque to weight ratio of the Lx to the Si (because torque matters more on the tight confines of an auto x course) the Lx has to pull 20.59 lbs per foot lb of torque, where the Si has to pull 20.76 lbs per foot lb of torque. Also, the Lx can do over 60 in second so it will not require a time wasting up shift to 3rd and down shift back to second.

The Lx + HFP will own in the corners. 229 lbs is a lot of weight to have to change direction. Also, the LX has a lower Cg and better weight distribution than an Si so those will help increase cornering speed.

The LSD in the Si sucks. It does just enough to keep the inside wheel from spinning. Since the Si will be out of VTEC most of the time, there will not be enough power to activate the LSD anyway, so what little advantage it has is negated as well.

Brakes don’t stop a car, tires do. Since both cars will have the same tires, both should have equal braking performance. Regardless of the fact that the Lx has rear drums, it can still lock the tires up. That means that the brakes have more power than the tires can handle. This means that both the Si and Lx will have to do threshold braking in order to keep the tires from locking up and losing time. Once again, the 229 lbs weigh difference will also negate any braking advantage the Si might have.

On a road course however, Si>Lx + HFP. There is not enough of a difference in handling for the Lx to make up the 57 hp difference.

In conclusion, the Lx + HFP will out handle an Si with ease and should beat an Si on an auto x course.

05-07-2008, 08:31 PM	#12 (permalink)
*Sirbelch* Louder than 4 F404-GE-400 Join Date: Jan 2007 Location: Vacaville CA Age: 27 Posts: 5,593 Paul iTrader: 1 / 100%	Lx + HFP > Si especially on an auto x course. The thing about an auto x course is, it’s too slow for the Si to always be in VTEC. 15-60 mph is about the range of speed on an auto x course. The Si will hardly get out of 2nd gear on most auto x courses. So anything below 37 mph, the Si will be off the big cam at which point the power difference between the Lx and Si is negated by the weight difference. Furthermore, the Lx is only down 10 lbs ft of torque to the Si and its torque peak is 1800 rpm lower than the Si. If you do a torque to weight ratio of the Lx to the Si (because torque matters more on the tight confines of an auto x course) the Lx has to pull 20.59 lbs per foot lb of torque, where the Si has to pull 20.76 lbs per foot lb of torque. Also, the Lx can do over 60 in second so it will not require a time wasting up shift to 3rd and down shift back to second. The Lx + HFP will own in the corners. 229 lbs is a lot of weight to have to change direction. Also, the LX has a lower Cg and better weight distribution than an Si so those will help increase cornering speed. The LSD in the Si sucks. It does just enough to keep the inside wheel from spinning. Since the Si will be out of VTEC most of the time, there will not be enough power to activate the LSD anyway, so what little advantage it has is negated as well. Brakes don’t stop a car, tires do. Since both cars will have the same tires, both should have equal braking performance. Regardless of the fact that the Lx has rear drums, it can still lock the tires up. That means that the brakes have more power than the tires can handle. This means that both the Si and Lx will have to do threshold braking in order to keep the tires from locking up and losing time. Once again, the 229 lbs weigh difference will also negate any braking advantage the Si might have. On a road course however, Si>Lx + HFP. There is not enough of a difference in handling for the Lx to make up the 57 hp difference. In conclusion, the Lx + HFP will out handle an Si with ease and should beat an Si on an auto x course. __________________ You know what the sun's all about when the light go out.