Owen Posted August 11, 2001 Share Posted August 11, 2001 Rotaries rule! You might want to check out stocker Cosmo engines from Japan, or just the crank. If you're doing a rebuild might wanna spring for those new N1? seals too, expensive but much stronger I hear. Can't remember what car it was but Mazda has a new design for the ports on the rotary which makes it much more fuel efficient, I'll try and find the article. Also, try Racing Beat here in California, my friend's dad owns it. They aren't seen very much anymore except for Bonneville. Tri-rotor, tri-turbo...drool Owen Quote Link to comment Share on other sites More sharing options...
Owen Posted August 11, 2001 Share Posted August 11, 2001 http://www.racingbeat.com/Home.htm Quote Link to comment Share on other sites More sharing options...
randy 77zt Posted August 11, 2001 Share Posted August 11, 2001 i have got prices from 2 different sources for 20bt at $3500.the best way to make rotor seal last in these is to use some 2 stroke dirt bike oil in the gas.most mazda engines had a little pump that uses some of the crankcase oil and injects it into intake.so if you wind it up you burn oil.best to run oil in gas and get rid of oil injection.i have watched a late model rx7 at thunderhill run with a 3 rotor.it sounds like f1 car. Quote Link to comment Share on other sites More sharing options...
Guest Speaker Posted August 17, 2001 Share Posted August 17, 2001 a 2 rotor sounds like a weedeater on crack a 3 rotor sounds like a Ferrari Flat-12 incredible sound from the 20bs... I believe Stony has a sound clip of one on his website Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted August 17, 2001 Share Posted August 17, 2001 Weedeater on crack? Maybe unmuffled but with a turbo or two and a somwhat decent exhaust the sound is incredible. I'm not talking really loud just weird. I actually sounds a little like a baby crying from inside my car - a weird WHAAAAA sound. Before the stock catalytic was swapped out tunnels were incredible and anytime I raced someone thye always commented on the truly bizarre sounds. Now with the aftermarket cat I can hardly wait to hit a tunnel - underpasses are pretty wild (lol). I passed a friend on the road going the other way just last weekend. I was hammer down probably doing a good 75+ WOT. He said he heard this wild sound like a Learjet, looked around, and saw a flash of yellow on th eother side of the road over the jersey barrier. He actually called me up to ask if it was me - said it sounded like a Learjet! I'm going to have a friend zip by me one time so I can stand on the side of the road and listen to it. The sounds from inside are pretty wild and I cannot imagine what it must sound like form outside. Side note - if you remove ALL cats on an RX7 it's really loud and sounds like a motorboat at idle (IMO). On WOT shifts it will actually blow flame out the back of the car ! I've seen videos of that and heard several RX7 folks comment on it. Pretty wild but I don't see my car going that route. I AM pretty tempted to find an RX7 TurboII to play with. They can be made as fast or faster than the later twin turbo FD3s I'm told. Like I need another toy... Quote Link to comment Share on other sites More sharing options...
Guest Speaker Posted August 17, 2001 Share Posted August 17, 2001 What's the point of NOT removing the cat? I own a TurboII and it has a straight flow exhaust with no restrictions... it sounds good in the car but sounds like an outboard or a weedeater on crack on the outside... sounds pretty good at WOT though but by NOT removing that cat you're losing A LOT of power; relatively speaking of course... the rotary needs a lot of airflow... and a cat is a big restriction... but yes they do spit fireballs as mine does too... its a lot of fun and will scare the shit out of some people hehe But I still can't see the point of putting a 13b into a Z... I can understand a 20B... but a 13b Z won't be any faster than the RX-7 it came in with the same mods... so its just an RX-7 with a different body... get a 20b Quote Link to comment Share on other sites More sharing options...
Guest Speaker Posted August 17, 2001 Share Posted August 17, 2001 You can go to jail for removing a cat? I'm speaking out of ignorance here; I forgot a lot of you weren't blessed with the ability to mod your car to your choosing without being told "no" by the Pollution people Alabama isn't such a bad place afterall is it? Quote Link to comment Share on other sites More sharing options...
stony Posted August 17, 2001 Share Posted August 17, 2001 rotary's run very rich even stock. thats why you get flames out the exhaust. if you wanna here some coll sounds of rx-7s check out my sound page. got a 20bt on there too ;> Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted August 17, 2001 Share Posted August 17, 2001 Yeah, it would be a Federal Offense to remove the cat - that's likely true in any state BTW since it's a Federal law not a local one. It's not often enforced but it's something over a grand for EACH emissions device. On a Mustang that's between 4 and 6 (!) cats BTW. I've met one person who got nailed for this - he mouthed off to the cop it seems and had straight pipes I'm honestly not worried about being tossed in jail but this is a hi-flow cat and it seems to be flowing MUCH better than the stock one. The precat has already been replaced with a stainless downpipe My car is no longer running quite so rich I'm pretty sure. I've got an airbox, intercooler, DP, cat, catback - no computer This is a MAP sensed system guys so you can imagine that's slowly but surely been eating up it's safety margin. I've got a purple PMS to go in but it's present programming is suspect and Peter the Pirate wants $350 to update it's PROM to the latest and put in good settings. Kripes, it's just a PROM! I'll do it as soon as the trans issue is resolved on the Z and I know what money I've got. I'd have done it already otherwise but the trans thing came up. I have no keypad for the PMS so I'm looking for the laptop software - InterACQ I think it's called. Anyway, 13B, 20B - I don't really know the difference to be honest. I don't know rotaries very well and lost the mechanic I was using too (sigh). I've been told that TurboII's can be made just as fast if not faster than FD3s. A single turbo probably makes it easier and if I found one in good shape I'd be interested in playing with it. The car I've got now is a blast and when the second turbo hits it's like Kirk just ordered up warp speed! Right to redline it screams - what a rush. I don't know how this would work out in a Z but I'd certainly do it in a 510. Unfortunatly my number of cars is quite high enough right now and another project would send the woman into fits. someday I'll have an emisisons free 510 and maybe a rotary to go with it. Heck, an RX3 would be really cool too bu tI've only ever seen one. Scottie, if that puppy ever goes up for sale let me know ASAP! Would love to get together locally with folks who know rotaries and learn more. One of these days when I've got time anyway. Love reading up on them but they're a bit unknown to me and I worry I'll blow mine up. Quote Link to comment Share on other sites More sharing options...
fl327 Posted August 18, 2001 Share Posted August 18, 2001 rotorys are pretty cool, for me i would only go with one if i could find a way to "jtr" it, and only if i was running autocross in some restricted 2.0 liter class or something, besides that, those things scare me stupid. Quote Link to comment Share on other sites More sharing options...
Guest Speaker Posted August 18, 2001 Share Posted August 18, 2001 quote: Originally posted by stony: rotary's run very rich even stock. thats why you get flames out the exhaust. if you wanna here some coll sounds of rx-7s check out my sound page. got a 20bt on there too ;> actually its not because they run rich all the time; its because when you go to redline and you shift to the next gear; for a moment it runs insanely rich... just a benefit (imo ) of the rotary thats why if you like run to redline in like 2nd gear and then just let off the gas it will spew flames like crazy... Quote Link to comment Share on other sites More sharing options...
pparaska Posted August 18, 2001 Share Posted August 18, 2001 quote: Originally posted by Speaker: What's the point of NOT removing the cat? Bi-annual emissions testing, fines, jail, etc. Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted August 19, 2001 Share Posted August 19, 2001 LOL, that's where mine pops and crackles a bit in the exhaust now Hrm, migh thave to have someone follow me one evening and see if there's anything blowing out the back. I HAVE to upgrade the fuel before Fall. Last Winter if it hit 4200 RPM and switched turbos the added power was enough to slip the clutch in higher gears! During the heat of Summer it kicks but the difference in power during the colder months is noticable. I'll pop the engine come fall if I don't do something - wish I could bump up the fuel pressure easily (sigh). Get past the trans, then the RX7 gets some attention, then the Mustang. Quote Link to comment Share on other sites More sharing options...
stony Posted August 22, 2001 Share Posted August 22, 2001 OOOOHHHHHH!!!!!! lookie what i found !!!!! wish i didnt allready do the rb swap id love to try a 20b with a big turbo ;> http://cgi.ebay.com/ebaymotors/aw-cgi/ebayISAPI.dll?ViewItem&item=594557763&r=0&t=0 Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted August 22, 2001 Share Posted August 22, 2001 Man, that's just not fair! Wish they had an actual picture of the motor though - I HATE it when they use pics from other places like that! I seem to recall shane Racing being one of the big sellers of those motors. Been reading my RX7 book here lately, sure would be fun to have a Turbo II motor in something small like a Miata or 510... Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted September 10, 2001 Share Posted September 10, 2001 A 20b sounds nice. I know the "official" rating is 280 hp but how much does it really put out? Like 330 horses and 340 lb/ft.? I've always loved the Cosmo, it's too bad the Japanese don't bring a lot of their good stuff over here (I'd take Skylines, Chasers, Lancers, Silvias and Cedrics over any of the econo cars here anyday). The 20B is quoted as being 130 pounds heavier than the 13B-REW (in an issue of Sport Compact Car) so I'm thinking it's still a paperweight compared to other 300+hp motors. I heard Mazda already does have a 4-rotor motored designated the 26b? Rumor had it that it as also TT. Now that would be one heck of a rotary engine!! Quote Link to comment Share on other sites More sharing options...
Drax240z Posted September 10, 2001 Share Posted September 10, 2001 I believe Mazda used some 4 rotor Wankel engines in some of their race cars. (Le Mans stuff) Damn a 20B in a Z would kick ass! Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted October 27, 2001 Share Posted October 27, 2001 Hey rhino37, ive got a bunch of parts of my 87 Turbo II that im looking to sell. IF u want any parts PLEASE LET ME KNOW. My email adress is llamaslayer@hotmail.com thanks Joe Quote Link to comment Share on other sites More sharing options...
Guest RXO510 Posted October 27, 2001 Share Posted October 27, 2001 Putting a rotary in a Z will be no problem for you. You will have lots of space in the engine bay. I currently have a 1200 for Drag racing and a 510 both with rotary conversions. I have a pic of the 510 in my homepage. Lots of fun. Now I'm learning about V8's. Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted October 27, 2001 Share Posted October 27, 2001 Homepage URL plz Would liek to see the rotary 510! Quote Link to comment Share on other sites More sharing options...
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