high compression rotors on a NA 20b
#55
yes i know that, there is one sitting in my shed, and what is up with everyone saying a pp aint streetable??? my 20b has done 30,000ks and is still going strong. here is the mods if anyone is interested.
Full custom built short crank 3rotor, Peripheral port, lightened & balance hi-comp RX8 rotors, custom hand built short crank, x-drilled, 3 window berings, hi-rev mod stationary gears, hand fabricated inlet manifold & fuel runners, 6 oversize injectors, 6x Bosch 616 coils, NGK plugs, Bosch 044 fuel pump, custom surge tank, Microteck LTX10s, Filter, alloy radiator, twin electric fans, CraigDavies electric water pump, custom MSD leads
Full custom built short crank 3rotor, Peripheral port, lightened & balance hi-comp RX8 rotors, custom hand built short crank, x-drilled, 3 window berings, hi-rev mod stationary gears, hand fabricated inlet manifold & fuel runners, 6 oversize injectors, 6x Bosch 616 coils, NGK plugs, Bosch 044 fuel pump, custom surge tank, Microteck LTX10s, Filter, alloy radiator, twin electric fans, CraigDavies electric water pump, custom MSD leads
#57
If u want a lot of torque from a 20b u need to go turbo. The speedsource RX-8's for example run in the Rolex Grand-Am series run 20b NA engines. I think they run modified rx-8 rotors, although they wont say....u can bet they are 10.0:1, the weight is just a secret. They are PP motors with ITB's, fixed runner lenght(unlike the 13g) and they run a Motec. Officially they make 425hp @ 8500 rpm and 285 ft/lbs torque at 7700rpm. U will be hard pressed to get more torque than they do, unless u want to by a 13g, which u can still find on racecars.com but they are $40-50k. HP is another story, if u are willing to sacrafice the longevity of your engine and build it properly, a 20b can run up to 11,000 rpms or so, and then u r talking 450-475hp. There is a guy in australia who has a 20b in a FC Race car and he runs it up to 10,400. Speedsource runs theirs up to 9500 and makes over 450hp for sure, depends on the track.
#59
Rotary Freak
Join Date: Feb 2001
Location: Okinawa, Japan
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Necromancy is the new cool.
Speaking of people that don't post much here any more - here's me!
That 20B FC 87GTR and RETed were talking about......it was found here on Okinawa. Long story short, it's no longer in existence, but I got a lot of part off of it.
Speaking of people that don't post much here any more - here's me!
That 20B FC 87GTR and RETed were talking about......it was found here on Okinawa. Long story short, it's no longer in existence, but I got a lot of part off of it.
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trickster
2nd Generation Specific (1986-1992)
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07-01-23 04:40 PM
13b, 20b, 971, bridgeport, bridgeporting, compression, engine, gas, high, mandeville, na, porting, pump, reliable, rotor, rotors, running