Will the HKS Twin Disk hold enough for a 20B?
03-05-07, 06:51 AM
#2
03-05-07, 07:36 AM
#3
so for the money is it better than the act combo?
Originally Posted by howard coleman
the exedy twin cerametallic is rated at 600 rw torque for road racing and 518 for drag racing.
the HKS should be in the same range.
howard coleman
the HKS should be in the same range.
howard coleman
03-05-07, 02:22 PM
#7
Racing Rotary Since 1983
iTrader: (6)
you do not want a single plate clutch. since the frictional are is small compared to a double or triple you need major spring pressure ("clamp pressure").
double and triple disc clutches generally have less springs since they have more frictional area and are easier on your leg and the clutch actuating arm.
what turbo will you/are you running?
hc
double and triple disc clutches generally have less springs since they have more frictional area and are easier on your leg and the clutch actuating arm.
what turbo will you/are you running?
hc
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03-05-07, 04:30 PM
#8
t76
Originally Posted by howard coleman
you do not want a single plate clutch. since the frictional are is small compared to a double or triple you need major spring pressure ("clamp pressure").
double and triple disc clutches generally have less springs since they have more frictional area and are easier on your leg and the clutch actuating arm.
what turbo will you/are you running?
hc
double and triple disc clutches generally have less springs since they have more frictional area and are easier on your leg and the clutch actuating arm.
what turbo will you/are you running?
hc
03-05-07, 07:40 PM
#11
Racing Rotary Since 1983
iTrader: (6)
t 76 87 pounds per minute will make 650 to 670 max rw rotary hp.
a 2 rotor making 670 makes 500 rear wheel torque. i don't know about a 3 rotor.
my opinion is that clutches are expensive and you sure don't want to buy them twice. maybe someone can post what torque a 3 rotor makes at 670 rear wheel hp.
the exedy cerametallic is good for 600 rw TQ and 518 if you are drag racing according to exedy. the hks should be similar but i would favor the exedy since they do all the r&d and hks just rebadges... (exedy is the racing r&d arm of Daikin, a multibillion dollar a year auto power transmission co)
carbon/metal holds approx 10% less torque.
the exedy triple holds 890 and 770 if you are drag racing.
check exedy prices at nengun.com
hc
a 2 rotor making 670 makes 500 rear wheel torque. i don't know about a 3 rotor.
my opinion is that clutches are expensive and you sure don't want to buy them twice. maybe someone can post what torque a 3 rotor makes at 670 rear wheel hp.
the exedy cerametallic is good for 600 rw TQ and 518 if you are drag racing according to exedy. the hks should be similar but i would favor the exedy since they do all the r&d and hks just rebadges... (exedy is the racing r&d arm of Daikin, a multibillion dollar a year auto power transmission co)
carbon/metal holds approx 10% less torque.
the exedy triple holds 890 and 770 if you are drag racing.
check exedy prices at nengun.com
hc
03-06-07, 11:21 AM
#14
Going off some dyno's I've seen and a general rule of thumb, here are some torque numbers for a 20B-
N/A- 195-230rwtq (259- 306rwhp@7k)
Boosted 7.5lbs- 290-345rwtq (386- 459rwhp@7k)
Boosted 14.7lbs-390-460rwtq (519- 613rwhp@7k)
Boosted 22lbs- 495-575rwtq (659- 766rwhp@7k)
This is assuming a 20b will hold peak torque to 7k, which alot dont.
N/A- 195-230rwtq (259- 306rwhp@7k)
Boosted 7.5lbs- 290-345rwtq (386- 459rwhp@7k)
Boosted 14.7lbs-390-460rwtq (519- 613rwhp@7k)
Boosted 22lbs- 495-575rwtq (659- 766rwhp@7k)
This is assuming a 20b will hold peak torque to 7k, which alot dont.
03-06-07, 03:33 PM
#15
Racing Rotary Since 1983
iTrader: (6)
if pushed to max air output turbos eventually end up like restrictor plates in that they will flow a certain amount of air and no more.
your T78 is good for 87 lbs per minute and flowed thru the rotary efficiency scale it should make no more than 670 rwhp. ( o k on nitrous etc etc but i am assuming you are close to sane which probably is a mistake since you are building a full tilt 3 rotor)
using the Tq numbers from the above post at 659 rwhp you are at 500 ft pounds. the exedy twin cerametallic holds 600 non drag racing and 518 drag racing.
btw to run that output you will be needing a different trans, a different rear end or a gusseted FD rear end and a set of axles... that is if you put your right foot down alot. and if you do, you'll be wanting 300 and something rear tires w about 26 pounds of air and your car is will still be going sideways probably more than straight ahead.
but you probably already know all that.
hc
your T78 is good for 87 lbs per minute and flowed thru the rotary efficiency scale it should make no more than 670 rwhp. ( o k on nitrous etc etc but i am assuming you are close to sane which probably is a mistake since you are building a full tilt 3 rotor)
using the Tq numbers from the above post at 659 rwhp you are at 500 ft pounds. the exedy twin cerametallic holds 600 non drag racing and 518 drag racing.
btw to run that output you will be needing a different trans, a different rear end or a gusseted FD rear end and a set of axles... that is if you put your right foot down alot. and if you do, you'll be wanting 300 and something rear tires w about 26 pounds of air and your car is will still be going sideways probably more than straight ahead.
but you probably already know all that.
hc
