Guest Anonymous Posted July 27, 2001 Share Posted July 27, 2001 Hey! I'm looking into building the velo rossa spyder, but I want some power to back up those looks. I currently own an 87 Rx-7 TII (turbo for those who don't know), and it will FLY. I will upgrading the engine soon to be putting 400+rwhp down. I know that some think the rotary is unreliable, but that is just becuase of improper care and tuning. So, I was thinking...why not transplant my screaming rotary into the z? Is this very difficult? Engine buildup cost is not a problem b/c I was going to do it anyway. I'm just concerned with actually putting it in the car. Along with my tranny and rear end (Turbo 2s have quite stout drive trains). -Ryan Quote Link to comment Share on other sites More sharing options...
Mike kZ Posted July 27, 2001 Share Posted July 27, 2001 Welcome to the Forum Ryan! I don't know much about rotarys, but if that is what you want, start taking a lot of measurements! As far as I know you will be the first to do this. Snellville eh? That's close to me, Lilburn. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted July 27, 2001 Share Posted July 27, 2001 I would think (and I too don't know for sure) that the rotary would positively swim in the engine compartment of the Z. Not sure how all the turbo(s) sit off of the engine, but the rotary is real short and should offer alot of setback in the engine compartment and weight savings. If we can slide a V8 into one of these, a 2 (or 3!) rotor should be pretty easy. As a side note quite a few of the Rx7/V8 swaps are popping up, so its probably certain the Rotary will go into the Z without a hitch. Good luck with the RxZ Regards, Lone Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted July 27, 2001 Share Posted July 27, 2001 Thanks for the replies. Yeah Lilburn is close to me, but I will be moving to Athens to attend UGA this fall. I'm sure the engine would fit. I was just wondering mostly about mounting, and rear-end issues. How stout is the rear end from a z-car? What ratios are available? I would want something around 4.10 just because the rotary is not good in the low end. Again thanks for the info. Hopefully I will be starting on the project as soon as I find a good donor car. About this: What are the advantages/disadvantages to the different years of the z. Also engine management is not an issue, I will be using a haltech. Was a/c an option? Is it hard to retrofit? Any info would be awesome. Thanks Again, -Ryan Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted July 27, 2001 Share Posted July 27, 2001 Ya' I think they're fragile - I own an FD3 too Still, they make good power if you take care of them and a turbo 2 rotor would be very nice. I'd think there would be tons of room but beware one thing - torque. Most of th eZ rears are in the 3.336 to 3.90 range with 3.7 being found in LSD. The RX7 uses a 4 series gear I believe and that's due to the rotaries lack of torque. You might have to seek out a 4 series gear for the Z and it could be expensive. Just somehting to consider but I think the rotary would fit - fits in darn near everything else! Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted July 30, 2001 Share Posted July 30, 2001 Rhino you need to get up with Brian Feldman, he puts rotary's in 510's. There is also a 510 with a rotary right here in Winder off of hwy 316 let me know if you want to have a look and I'll set up somethig with the owner. Quote Link to comment Share on other sites More sharing options...
Guest Anonymous Posted July 30, 2001 Share Posted July 30, 2001 I'd love to see them rotary in a 510. I'm up in the winder area all of the time because my best friend lives there. I'm very busy this next week though. -Ryan Quote Link to comment Share on other sites More sharing options...
Z-Gad Posted July 30, 2001 Share Posted July 30, 2001 As far a 4 series gearing...the 85-86 (I believe) 200sx turbo has a 4:11 R200 rear diff. Good luck on the RxZ!! Quote Link to comment Share on other sites More sharing options...
jeromio Posted July 30, 2001 Share Posted July 30, 2001 All the info I have read, esp. here, points to the R200 being plenty stout enough. You may want to switch to CV jointed shafts though. If you have a 240, you can simply get the 280ZXt shafts and companion flanges from a salvage yard (I got mine, along with rear calipers, for $125). You have to use the 240 dust shields and modified 280ZXt seals. If you have a 280Z, you'll want to contact RossC about the adapters. I have an 85 200sx turbo 4.11 R200 in my car currently. Got it for $125 from a local yard. They actually had another one that I was going to grab just to have or pass on to others, but they crushed it . Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted July 30, 2001 Share Posted July 30, 2001 There's someone in close-by Georgia that's building 510's with rotary motors in them?! Do tell! And please kep an eye out for a decent one for sale as I'd be VERY interested! I think 510's are really cool and a rotary one would be WAY nice. Must be 25 years old or older though but for 510's that should be just fine. Vroom, post som epics somewhere if ya' can - way cool Quote Link to comment Share on other sites More sharing options...
Scottie-GNZ Posted July 30, 2001 Share Posted July 30, 2001 Jeromio, in your reference to a CV swap, why do you distinguish a 240Z from a 280Z? Quote Link to comment Share on other sites More sharing options...
jeromio Posted July 30, 2001 Share Posted July 30, 2001 Cuz the 280ZXturbo companion flange slides onto the 240Z stub axle whereas the 280Z stub axle requires the adapter (since its stub has 2 more splines than the 240Z/280ZXt). Certainly you could use 280Z stubs on a 240 and then use the adapter..... Quote Link to comment Share on other sites More sharing options...
stony Posted July 31, 2001 Share Posted July 31, 2001 Jeronimo!!!! I need 4.11 or higher gears all i need is the ring and pinion. if you come across another open diff let me know. The open diff ring and pinion will bolt up to the LSD clutch assy. I was going to bring back an assortment when i left japan but ran out of time ;< thanks stony Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted July 31, 2001 Share Posted July 31, 2001 Yeah, it would swim! Check out the size of this motor, the trans is nearly the same size! Sans brackets and manifolds it's pretty small, no? This is from a 510 site (I want a rotary 510!). Heck, I want a 510 period. Check out the size though - the Z bay would swallow it and look for another Scoobie snack! I wonder just how hard a 3 rotor would be to find and stick in there? Quote Link to comment Share on other sites More sharing options...
pparaska Posted July 31, 2001 Share Posted July 31, 2001 Heck, looks to me like a 4 rotor would fit! At that point, a turbo on it would not really be needed for some nice torque! Quote Link to comment Share on other sites More sharing options...
jeromio Posted July 31, 2001 Share Posted July 31, 2001 Stupid newbie question: how modular are those Mazda rotaries? I mean, can you just make a new "crank" (what's it called in a rotary?) and keep on bolting on more rotors and cases? Long ago I did have an 85 RX7, very briefly (6 months). I had to sell it for the downpayment on my first house. Great car. Terrible mileage though. Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted July 31, 2001 Share Posted July 31, 2001 They seem to be pretty modular but it's not an easy task to build a new crank A 3 rotor motor CAN be found from a JDM Cosmo I believe - with turbos if memory serves. Can you say SICK power?! The two rotor with a turbo is actually pretty torquey I think, moves along nicely. With some decent engine access pulling it and fixing broken stuff would sure be easier! Hrm, FD3 T motor perhaps? I think my next project might be a turbo rotary 510. We'll see. I could deal with a GN motor too or maybe a turbo L6. I've got to get the Mustang running and decide if I'm going to keep it though. Selling it would be stupid but lately I've just not had much interest in it and it's taking up room. The woman says no more cars (lol). I speak and she just says "lalalala"! We'll see,got to get the Z on the road first before I explode in anticipation. Quote Link to comment Share on other sites More sharing options...
stony Posted July 31, 2001 Share Posted July 31, 2001 rotary motors are ausome they are easy to rebuild and easy to port. ....intake and exhaust porting is the same as cam profiles in a piston motor so you have to know what your doing. you have to tune it right the first time especially high power motors and always run the best gas. If you knock a rotary its history. there are plenty of low 9 sec fc and fd 7s... im not sure on the weight but i think they are heavier then the Z. if you could swap an entire 7 drivetrain it would be a strong car for sure... my 7 in japan was in the 400 rwhp range and i never broke anything in the thing except the motor. I dont think (imho) its very streetable above 450-500HP. powerband is ausome...4000 nothing kinda wondering when its gonna kick then 4500 ,and its wildly spinning the wheels thru 9000rpm ;> and the sound with an open external wastegate is well put it this way i always wore earplugs when racing otherwise ears would ring for a week ;> You would have gobs of room in teh engine bay if you could picture a sr-20 in a 69 camaro it would be about the same;> and lots of room for big turbo ;> l8rz stony Quote Link to comment Share on other sites More sharing options...
randy 77zt Posted August 10, 2001 Share Posted August 10, 2001 for picture of 3 rotor 20bt twin turbo goto www.corksport.com.3 rotor would fit easy in a z.i have lots of l28 turbo parts laying around but i think i would buy a 20bt before spending a lot of money on l28 motor. Quote Link to comment Share on other sites More sharing options...
BLKMGK Posted August 10, 2001 Share Posted August 10, 2001 Oh yes, this would be INCREDIBLE! The sound alone would be sweet. A rotary at full song is one bizarre sunding thing let me tell you. I wonder what they're selling these for... Quote Link to comment Share on other sites More sharing options...
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