Taller apex seals in Rx8 rotors - is this common yet?
08-05-2012, 04:33 AM
#27
Registered
Interesting idea, then why did they develop ceramic apex seals?
Anyway, I like the older RX7 size apex seals, in Renesis rotors, which need EDC to enlarge the groove.
Last edited by Rote8; 08-05-2012 at 11:01 AM.
08-06-2012, 08:02 AM
#33
rev it up
I am sure your setup in a FI in a precision built and balanced engine will yield good results.
08-17-2012, 10:21 AM
#35
Registered
Who did your engine and what was the cost, also, what was the cost of the EDM cutting of the apex groove on the rotors?
05-22-2013, 12:54 PM
#37
yes, but the slots need to be really accurate, so the mill takes a really talented operator to be successful.
the slot not only has to be the right depth, which isn't bad, but it needs to be the right width, AND needs to be square, which is hard, especially on used rotors
so has it been done on a mill successfully? yes. has it been done on a mill really badly? yes
the slot not only has to be the right depth, which isn't bad, but it needs to be the right width, AND needs to be square, which is hard, especially on used rotors
so has it been done on a mill successfully? yes. has it been done on a mill really badly? yes
Last edited by j9fd3s; 05-22-2013 at 12:56 PM.
05-27-2013, 02:53 PM
#39
06-06-2013, 06:54 PM
#43
so you would use brand new parts to conduct a test that could potentially destroy it?
you sir must be swimming in cash.
I plan to test the machining on some bad rotors and see how it works, if its good then I will run the procedure on my good parts.
you sir must be swimming in cash.
I plan to test the machining on some bad rotors and see how it works, if its good then I will run the procedure on my good parts.
06-12-2013, 09:50 AM
#45
SARX Legend
iTrader: (46)
I can see using used rotors if there is a chance the machine shop could **** things up. But otherwise on my next build new parts will be used regardless of the specs of my parts. Pay now or pay later.
06-12-2013, 06:03 PM
#46
the procedure is doing great everthing is coming into spec, I am with shadyscrew, I'll be happy with used parts to spec.
new becomes used very very quickly......
I am sure your engine will last a long time 9krpmrx8 good folks built your motor!!!
and a maintenance ***** drives it :P
06-12-2013, 07:29 PM
#48
I have been searching and I am trying to decide on the depth of the cut
Rx7 specs
8mm tall apex seal
9.7-9.9 apex seal depth in rotor (measured)
1.7-1.9mm for apex springs
Rx8 specs
5.3mm tall apex seal
6.3 apex seal depth in rotor (measured)
1mm for apex seal springs.
I plan to use rx8 springs, so far the two test I have done on the rotor go down to 9.5mm deep, without issue.
Rx7 specs
8mm tall apex seal
9.7-9.9 apex seal depth in rotor (measured)
1.7-1.9mm for apex springs
Rx8 specs
5.3mm tall apex seal
6.3 apex seal depth in rotor (measured)
1mm for apex seal springs.
I plan to use rx8 springs, so far the two test I have done on the rotor go down to 9.5mm deep, without issue.
06-12-2013, 07:54 PM
#49
I have been searching and I am trying to decide on the depth of the cut
Rx7 specs
8mm tall apex seal
9.7-9.9 apex seal depth in rotor (measured)
1.7-1.9mm for apex springs
Rx8 specs
5.3mm tall apex seal
6.3 apex seal depth in rotor (measured)
1mm for apex seal springs.
I plan to use rx8 springs, so far the two test I have done on the rotor go down to 9.5mm deep, without issue.
Rx7 specs
8mm tall apex seal
9.7-9.9 apex seal depth in rotor (measured)
1.7-1.9mm for apex springs
Rx8 specs
5.3mm tall apex seal
6.3 apex seal depth in rotor (measured)
1mm for apex seal springs.
I plan to use rx8 springs, so far the two test I have done on the rotor go down to 9.5mm deep, without issue.