In advance, sorry if these are a bit noobish questions



1) I read that the 20Bs only came in automatics because they were ment to be for luxury cruising vehicles, and not rockets- does that really effect the performance of the engine. Meaning, since it wasn't made for racing that it shouldn't be used for it?



2) Could you swap out the rotors in the 20B and put in s5 NA rotors for higher compression if you wanted to make the car an NA instead of a turbo?



Thanks in advance

1)The 20B generally can't rev as high as a two rotor engine because the eccentric shaft is less able to, or something. The later engines had better internals.



They can be driven hard with lots of boost though. 400HP is easy with a few mods. 5-600+ is capable with more mods. The exhaust sleeves can be replaced with T2 or FD ones.



The flex plate can be removed and the counterweight can have an aftermarket flywheel bolted to it and a pilot bearing and seal can be installed in the eccentric shaft for use with a manual tranny. One or two of the bolts won't be used, but the two dowel pins still line up correctly.



2)Yes. Pretty cool, huh?

Question:



About how much h wpuld a 20b with s5 na rotors make with stock ports? Street ported? BrdigeporteD?

250HP stock, 280 streetported (I think), bridgey is a lot more. Not sure exactly how much.



My stock ported 20B with stock low compression rotors in NA mode will probably have 225HP and 180 torque. Maybe less 'cause the compression may still be low after the MMO treatment. My new goal is to spend no more than $2003 on it. Kinda my own GRMS challange.

the engine was designed for the cosmo a 3200-3400lbs coupe. so the 20b is designed to make 80% of peak tork (stock), between 2000-6000rpms. they also built it to be smooth over powerful. it feels a lot different than a 13b, it is a lot smoother and the power is similar to an fd but its more effortless. the 20b doesn't really care what gear you are in, it just goes



mike

I see, very educational. Thanks for the info guys!