hey all you guys with 20Bs installed. What kind of power are you running right now.

If you have dynoed it the sheet from it would be awesome.

I just want to get this all in one place a general idea of the average power of these cars.

BTW 20Bs rule and pistons suck!

 

Chito's:
http://www.3rotor.com/chito.htm

 

I'm going to try for 225HP out of mine. It'll be NA and the ports together are around the size of a streetport. That means if a ported 13B gets around 150HP, that's 75HP per rotor. 75 x 3 = 225HP

 

my stock turbo/port motor is going to see a dyno in the next xouple of weeks, one at the waste gate spring (5.5psi) and one at stock boost (8.5-9), and fuel permitting, and plumbing fixtures in the intake permitting, maybe more

mike

 

jeff you'll see closer to 250-300hp

 

a 3 rotor will make more HP than 1.5 times a 13B with the same ports, the torque transfer onto the E shaft is more often and thru alot of scienitific stuff it means more HP, 400 HP from a street port n/a 3 rotor is easily achieveable

 

Heh, I was just reading this at Craig's Rotary Page:

*With turbos removed (naturally aspirated), these engines produce 250hp stock, 320hp if ported.

How much torque do you think it will have? I know HP is a function of torque, and at 5252RPM they're the same, but I don't know how to work it out. I hope it won't break the tranny.

 

By the way, his topcities site is down, but this one still works:

http://cp_www.tripod.com/rotary/pg20.htm#perform

 

368 RWHP and 428 RW lb/ft. See http://www.cris.com/~Asam/Dyno1.html

The results were somewhat skewed by a bad BOV on the second turbo, which caused the abrupt drop-off in power at 6200 rpm. Without that, the hp would have been slightly higher.

Allowing for 15% drivetrain loss, it would be 427 hp and 478 lb/ft of torque at the flywheel. That's running the stock turbos to 14.7 psi and with no internal mods to the motor. The limiting factor is the stock turbos; they just run out of breath.

FWIW, Peter Farrell said at the 2000 MADS banquet that, based on testing with my car, 1000 hp was a realistic goal, if the motor was modified like the one in his drag car (27 psi boost and a 100-shot of NOS).

 

thats a lot of torque!

 

Yessir! If you've talked to many people who have driven a 3-rotor, you've probably heard them say something like "It's different." And that's the difference.

Many people say, "I can get 427 hp out of my [insert 2-rotor with many mods here], so why do I need a 3-rotor?" That's the answer.

After riding around VIR with me, David Lane commented, "It's like the hand of God grabbed you by the butt and shoved you down the straightaway."

 

yah, it feels like something is pushing on your chest (i'm only up to 8.5psi), and its not very gear dependent, you can be in any gear and it pulls the same.

mike

 

I just can't get over how it sounds. Granted, I've only heard the audio of sound and video files downloaded from various places on the 'net. But in every one, a distinct 20B exhaust note is heard. I can't wait to hear it in person in my own car.

 

Thats it! I've been slacking this week. Haven't really touched the car in the last few days... I"M WORKING ON IT UNTIL ITS ON THE STREET TONIGHT! I gotta get this motor broken in so I can crank up the boost and hit the dyno before 7stock.

BTW, you think anyone will care that I still have parts of the car in primer and unpainted headlights cuz I can't afford the $400 to paint it? (I'm being serious... are people gonna be like "Look at that POS that he dropped a 20B in" or are they gonna be like "Wow that car is gonna F'n sweet when its finished!")

edit:
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One more thing. I've always thought my car was one of the cleanest S5s around. It was just having some clear coat problems, and someone through a pumpkin at it last year, other than that, I still think it looks good, so I guess that's what counts... and I know I'm going to get it painted soon... someone just pat me on the back and tell me its ok

 

stfu and finish it!!

 

Eat me Homer! I want a real response!!!

 

ok a 3 Rotor anything could never be ghetto, just unfinished.

 

dont worry about it. i know someone whos bringing a primered fd.... just make sure it runs =)

mike

 

At least you're doing it right by spending to go fast instead of just trying to "pimp" out your ride and still be stock/slow. BTW, i can't wait to see all these runnig 20b fc's at 7stock, the last thing I'd be worried about is cosmetics. Hopefully seeing these will light a flame under my **** to work on mine more.

 

Hmm, that 250-300HP is really starting to bother me. Looks like I'll have to change a few design plans around and start looking for a T2 5 speed. With one of these I should be safe up to around 400-450 torque (not counting diff, axles, drive shaft, etc because they'll remain stock untill they break hehe).

My old auto is also starting to act weird. It starting doing the same thing my friend's C4 Mustang tranny did before it died. It vibrates when you get on the gas, and is not RPM dependant. More like load dependant (and it was a very small load like a 1/4 pedal up a 1º or 2º grade, lol). It also feels so much heavier than my REPU. Coincidentally, I love the manual in my REPU. Both vehicles weigh the same so I guess I can expect even better performance out of my soon to be 20B project car, 'cause it's not a truck.

 

bad clutch pack? or maybe it needs new fluid...

mike

 

It most likely needs a flush and new filter. The fluid doesn't look anything like my friend's Mustang's fluid. His was burning and left burned-on fluid on the dipstick. I think his fluid cooler may have been plugged or something. He ended up killing two trannies.

My tranny shifts fine. It kinda throws you back into the seat when it's cold, and smooths out as it warms up. If it ever does break down, I'm not going to get another auto tranny. I'm getting some parts out of a 5 speed car so I can convert mine over. It's almost like auto insurance

 

Just a quick question: how much power can the old '70s ribcase trannies take? If the stronger T2 tranny can take 400-450 lbs/feet of torque like you said, do you think the old ones could handle 300-350 torque?

 

the t2 tranny is a ribcase, or r box. they did upgrade the synchros, and stuff but it shouldn't be any stronger or weaker than the 70's trannys, torque wise

mike

 

That's really cool! I don't need to speed shift so I hope I can find an old one with good synchros. I also wouldn't need to get a T2 starter or tailshaft. The only part that bothers me is how to fit the slave cylinder up where the heater core is. I'll need to cut into the firewall a little. The shifter itself will need to move back a bit, but it's just a center console mod (and the tranny hump). I've already moved a shifter back by 60mm in my MG project, so I expect similar issues here.