9000rpms?
01-30-2003, 11:41 AM
#1
Senior Member
Thread Starter
Join Date: May 2002
Location: California
Posts: 22,465
what do i need to do to keep the engine together at 9k? the gears on the tranny are to wide so on some corners i can bog 3rd or rev the **** out of 2nd. what do i need to do to keep the motor together over 8500rpms for long periods?
mike
mike
01-30-2003, 05:41 PM
#7
Senior Member
Join Date: Apr 2002
Location: IL
Posts: 2,930
I picked henrys brain over @ mazdatrix when I was ordering my parts to build my NA
what I've found is needed is...
increased oil pressure
cleareanced rotors
hardened stationary gears
uprated apex seal springs (and either carbon or ceramic apex seals so it doesnt eat the housing up)
he also mentioned they have their eccentric shafts machined for a larger clearance for the rotor bearings, I think it was .040" that he said, but I may not remember correctly
balanced rotating assembly
lightened rotors will help but arent required
and ports to flow enough for that rpm, coupled with intake and exhaust of course.
another thing is the two piece eccentric shaft that adds a roller bearing on the intermediate housing which is helpful to reduce flex.
oh and the rotor gears should be retained w/clip or something to keep them from walking out.
I think my next motor will be a >10k rpm NA, but I want to go crazy and use the aluminum side and intermediate housings from RB and ceramic apex seals. It would be nice to drop all that weight from the motor by replacing the iron housings with aluminum, mmm.
what I've found is needed is...
increased oil pressure
cleareanced rotors
hardened stationary gears
uprated apex seal springs (and either carbon or ceramic apex seals so it doesnt eat the housing up)
he also mentioned they have their eccentric shafts machined for a larger clearance for the rotor bearings, I think it was .040" that he said, but I may not remember correctly
balanced rotating assembly
lightened rotors will help but arent required
and ports to flow enough for that rpm, coupled with intake and exhaust of course.
another thing is the two piece eccentric shaft that adds a roller bearing on the intermediate housing which is helpful to reduce flex.
oh and the rotor gears should be retained w/clip or something to keep them from walking out.
I think my next motor will be a >10k rpm NA, but I want to go crazy and use the aluminum side and intermediate housings from RB and ceramic apex seals. It would be nice to drop all that weight from the motor by replacing the iron housings with aluminum, mmm.
01-30-2003, 07:05 PM
#9
Senior Member
Join Date: Jan 2002
Location: NJ USA
Posts: 1,915
Man I run my engines at 10,500 to 11,000 rpm and I don't have half of that info. posted here from mazdatrix. Mike what excatly is your question? are you looking for a tranny gear combo to keep your engine at 9000rpm on every gear shift?? or engine reliability at 9000rpm?
