Lighter wheels vs. Full Exhaust
01-21-2011, 11:14 AM
#22
Ur butt dyno will feel something. But dyno the care stock vs little bolt ons with the DE, it's not that impressive. U don't get a lot until u tune for it afterwards. Oh coarse u feel something., **** I put a new shift **** on the car and I think its faster mind over matter
01-21-2011, 11:54 AM
#24
Ur butt dyno will feel something. But dyno the care stock vs little bolt ons with the DE, it's not that impressive. U don't get a lot until u tune for it afterwards. Oh coarse u feel something., **** I put a new shift **** on the car and I think its faster mind over matter
01-21-2011, 01:22 PM
#28
I found some comments I made on another site shortly after I got my SSR's (~16lbs each)
I also found a post I made about bringing my test and tune times down from 41.9 to 41.6 after installing the wheels.
Originally Posted by Z1NONLY
Acceleration, braking and turning all feel "easier," for lack of a better word. My butt-o-meter says acceleration is better. Kind of like the difference between driving on a cold day vs. driving on a day when the air is hot. The car just feels more willing to do what I ask of it. The car responds to steering input a little quicker yet also feels more stable and "planted." (Some of this may have to do with the fact that the tires are no longer squeezed onto the smallest wheels allowable.)
I didn't really expect a noticable difference in performance until after I got the bigger tires but I have been pleasantly suprised.
I didn't really expect a noticable difference in performance until after I got the bigger tires but I have been pleasantly suprised.
01-21-2011, 07:36 PM
#30
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Lighter wheels will go along way. more so than the spacer and exhaust imo. besides, i forgot what tuner mag it was but they kept stock sespension, switched to Lighter wheels (rpf1's acually) and hotchikis sways and pulled a G on the skidpad.
So all in all Wheels is they way to go. Those were the only two supporting mods, rpf1's and hotchkis sways.
So all in all Wheels is they way to go. Those were the only two supporting mods, rpf1's and hotchkis sways.
01-24-2011, 03:23 PM
#31
I am studying mechanical engineering and can confirm that unsprung weight and sprung weight are completely different... not sure what the ratio is... also when talking about tire weight, the difference cant be measured by a simple ratio, when removing weight off of a wheel, the weight difference increases exponentially as speed increases... this is because it is a rotating mass...... the faster you go, the more difference will be felt basically.... loosing unsprung weight and reducing rotating mass, now thats killing two birds with one stone if you ask me
02-10-2011, 08:33 PM
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tuning is all about making your car better in every way without sacrifice. the smaller the wheel is the less of a contact patch there is so your car will handle worse with 17s. manufacturers put 19s on not cuz it looks pretty but cuz it performs better. I just took off the idler pulley and it made a noticeable difference in perf. the idler pulley right next to the power steering pulley has a crap berring in it and is a huge, unnecessary drag on the crank. get light rims but not small rims and get exhaust.
02-13-2011, 06:07 PM
#38
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tuning is all about making your car better in every way without sacrifice. the smaller the wheel is the less of a contact patch there is so your car will handle worse with 17s. manufacturers put 19s on not cuz it looks pretty but cuz it performs better. I just took off the idler pulley and it made a noticeable difference in perf. the idler pulley right next to the power steering pulley has a crap berring in it and is a huge, unnecessary drag on the crank. get light rims but not small rims and get exhaust.
Have you seen F1 cars? How about NASCAR? Indy? They all have a high aspect ratio on their tires (read: fat sidewalls). Keeps the rotating mass closer to the axis, and reduces the interia of each rotating assembly. That barrel weighs something, and it is harder to accelerate when it's at closer to the road.
The only exception could be GT cars ,they have relatively large wheels. No explanation for that one... dueces on that subject.
Short sidewalls give great turn in response but don't quite "comply" to the road like a higher aspect ratio tire could. Someone correct me if I'm wrong, please.
02-13-2011, 09:02 PM
#39
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BTW what is the difference in contact patch on a 275/40-17 mounted on a 17x9.5 and a 275/30-19 mounted on a 19x9.5?
02-13-2011, 10:10 PM
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tuning is all about making your car better in every way without sacrifice. the smaller the wheel is the less of a contact patch there is so your car will handle worse with 17s. manufacturers put 19s on not cuz it looks pretty but cuz it performs better. I just took off the idler pulley and it made a noticeable difference in perf. the idler pulley right next to the power steering pulley has a crap berring in it and is a huge, unnecessary drag on the crank. get light rims but not small rims and get exhaust.
