20" TIS03
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tis tis tis... TIS
Hmm? Spinners for $1300? Do they make them in gold finish??
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Send a PM to minihune Mele Kalikimaka & Hau'oli Makahiki Hou!
Hmm? Spinners for $1300? Do they make them in gold finish??
_________________
Send a PM to minihune Mele Kalikimaka & Hau'oli Makahiki Hou!
#7
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#9
actually, the tire diameter is 25.3" compared with 24-24.5 for stock..
this can be a problem with fit....the width of 225 is a little iffy also
unless the offset is just right and perhaps enlarging the wheel wells.
However, ... I'll bet the wheels are about 35-40# and the tires are
probably in the low 20 to mid 20's. That makes 55-65# per corner,
with almost all the weight near the periphery. That's gonna hurt
acceleration and braking and saddle the suspension with a big hunk of
unsprung weight which will hurt handling on rough roads.
(note from physics --- Kinetic Energy = 1/2 I w^2 where
I = MxR^2 ... R being the radial center of mass, w is rotational speed,
which for a 25.3" tire is 0.95xspeed in ft/sec...
use slugs for M (lbs/32.17) if you want to stay in the ft/lb/sec system and
lets you easily figure out hp (550 ft.lb./sec) to spin up to a given speed in
a certain # of seconds).
_________________
Cristo ---- my brg/brg mc is: BLIKSEM
this can be a problem with fit....the width of 225 is a little iffy also
unless the offset is just right and perhaps enlarging the wheel wells.
However, ... I'll bet the wheels are about 35-40# and the tires are
probably in the low 20 to mid 20's. That makes 55-65# per corner,
with almost all the weight near the periphery. That's gonna hurt
acceleration and braking and saddle the suspension with a big hunk of
unsprung weight which will hurt handling on rough roads.
(note from physics --- Kinetic Energy = 1/2 I w^2 where
I = MxR^2 ... R being the radial center of mass, w is rotational speed,
which for a 25.3" tire is 0.95xspeed in ft/sec...
use slugs for M (lbs/32.17) if you want to stay in the ft/lb/sec system and
lets you easily figure out hp (550 ft.lb./sec) to spin up to a given speed in
a certain # of seconds).
_________________
Cristo ---- my brg/brg mc is: BLIKSEM
#10
crunched some numbers for a reality check.
For my wheel tire combo (SSR 16x7 GT1 - 15# and
BS SS-03 205/60/16 24#) it would take about
6 hp to get the 4 tires spinning to 60 mph in 7 seconds
and to accelerate them linearly to 60 mph as well, and
would take a 60# 20" combo about 12 hp to do the
same... and takes about 78 hp (average) to propell the
remaining 2500 pounds of car and driver from 0 to 60 in 7 sec. This
doesn't include extra horsies to overcome rolling friction
and air resistance.
_________________
Cristo ---- my brg/brg mc is: BLIKSEM
For my wheel tire combo (SSR 16x7 GT1 - 15# and
BS SS-03 205/60/16 24#) it would take about
6 hp to get the 4 tires spinning to 60 mph in 7 seconds
and to accelerate them linearly to 60 mph as well, and
would take a 60# 20" combo about 12 hp to do the
same... and takes about 78 hp (average) to propell the
remaining 2500 pounds of car and driver from 0 to 60 in 7 sec. This
doesn't include extra horsies to overcome rolling friction
and air resistance.
_________________
Cristo ---- my brg/brg mc is: BLIKSEM
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6th Gear