NoPistons -Mazda Rx7 & Rx8 Rotary Forum

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-   -   Ideas for new engine trans combo in the Vert (https://www.nopistons.com/2nd-generation-specific-17/ideas-new-engine-trans-combo-vert-73696/)

89 Rag 01-11-2010 06:57 PM


Originally Posted by Rob x-7 (Post 837495)
I highly suggest a 13B-RE if you want to stay rotary, and a LS if you want pure raw power with equal wow factor



I have an 8 dyno'd and ready to go for the 33 Ford project that's on hold, just cant bring myself to put it in a rotary specific car

Rob x-7 01-11-2010 07:01 PM

the torque of the V8 would respond real well to the extra weight of the car

GreyGT-C 01-11-2010 09:13 PM

I agree with Mazdaspeed and Rob.. put an LS in it. I jump in my 500+ rwhp vette and drive a 1500 mile round trip every few weeks and all i do to it is change the oil... and rear tires alot. It also gets mid-30's gas milage. Gotta love that 6 speed and the torque to not lug at 1200 rpms on the interstate.

Nemesis 01-11-2010 09:40 PM


Originally Posted by thatpoorguy (Post 837492)
to hell with it, get a duramax diesel and do like the owner of nitrous express did. he has over a thousand lbs. of torque but gets 32 mpg on the highway lol



I need to see pictures of that!




Originally Posted by 89 Rag (Post 837498)
I have an 8 dyno'd and ready to go for the 33 Ford project that's on hold, just cant bring myself to put it in a rotary specific car



I would highly recommend the swap. I swapped an LS6 that was purchased for a different project into my GTU a couple of years ago after its second 13B crapped its pants. The car is sick, ~450rwhp and maintained perfect 50/50 weight balance.



I do love the rotary motors, it was a chocolate in the peanut butter moment for me... We ended up purchasing another 1990 vert for the wife, we're keeping that car a rotary.

thatpoorguy 01-11-2010 11:29 PM

http://www.nitrousexpress.com/projects.php



it competed in the hot rod power tour and they said it was over a thousand pounds of torque, but they don't say any numbers on their site. considering the parts they dumped into it though.........

thatpoorguy 01-11-2010 11:31 PM

go figure a diesel truck magazine had the best article on it :P



http://www.dieselpowermag.com/featur...max/index.html

j9fd3s 01-12-2010 12:28 PM


Originally Posted by 89 Rag (Post 837494)
Im just trying to get a feel again for PP, turbo, 2,3,4 rotor and an all inclusive cost to get the budget hammered out, i was out of the game for a while and need the be briefed on the latest and greatest



here's the dealio...



PP is loud and stinky, it is a simple device and pretty trouble free. mine fired right up after sitting for a month yesterday. its still an N/A after all... since you are starting with an 89 NA motor, cost isn't too bad... i'm in mine about 3k, i got some screaming deals, but its 100% new. since in theory, you could PP the existing engine, cost would be seals gaskets + labor + new efi system/intake



3 rotor. if i was gonna do another, it would be n/a. a stock port stock intake motor will do 235hp. add a custom intake and its more like 250-260. 3 rotor SOUNDS awesome...they add more low end torque too, the stock intake/EFI peaks in the 6200rpm area. these engines are expensive to buy, and since mazda is balancing 3 rotors with 2 counterweights, you either NEED a factory assembly, OR have it really carefully built by someone who KNOWS how to do it. they have this tendancy to break e shafts, thru a combination of bad balance and poor oiling. turbo setup gets complicated and expensive, 500rwhp is easy, more than 600 and it'll start breaking irons.



13b turbo; you can have your cake and eat it too... if you do your homework, like rob you can have something that drives like stock but makes excellent power (350-380), and is just as reliable as the stock t2. IMO if you pick the right parts, don't get greedy with the power, and make sure everything works before you beat on it, it's as reliable as anything else rotary.

Nemesis 01-12-2010 12:54 PM


Originally Posted by thatpoorguy (Post 837513)
go figure a diesel truck magazine had the best article on it :P



http://www.dieselpowermag.com/featur...max/index.html



That's pretty damn cool. I've been thinking about building a smaller diesel powered racer for some time now, I never considered a 6.6L Cummings motor...

thatpoorguy 01-12-2010 02:01 PM

lol they used the 6.6 duramax diesel from gm....

89 Rag 01-12-2010 02:11 PM


Originally Posted by j9fd3s (Post 837538)
here's the dealio...



PP is loud and stinky, it is a simple device and pretty trouble free. mine fired right up after sitting for a month yesterday. its still an N/A after all... since you are starting with an 89 NA motor, cost isn't too bad... i'm in mine about 3k, i got some screaming deals, but its 100% new. since in theory, you could PP the existing engine, cost would be seals gaskets + labor + new efi system/intake



3 rotor. if i was gonna do another, it would be n/a. a stock port stock intake motor will do 235hp. add a custom intake and its more like 250-260. 3 rotor SOUNDS awesome...they add more low end torque too, the stock intake/EFI peaks in the 6200rpm area. these engines are expensive to buy, and since mazda is balancing 3 rotors with 2 counterweights, you either NEED a factory assembly, OR have it really carefully built by someone who KNOWS how to do it. they have this tendancy to break e shafts, thru a combination of bad balance and poor oiling. turbo setup gets complicated and expensive, 500rwhp is easy, more than 600 and it'll start breaking irons.



13b turbo; you can have your cake and eat it too... if you do your homework, like rob you can have something that drives like stock but makes excellent power (350-380), and is just as reliable as the stock t2. IMO if you pick the right parts, don't get greedy with the power, and make sure everything works before you beat on it, it's as reliable as anything else rotary.



Call me crazy, but after reading this I'm considering starting with the PP option, and putting a turbo engine together on the heels of it as a side project. A 3 or 4 rotor would be cool but I still feel like they haven't got the attention that all the 2 rotor engines have gotten over the years.



I've heard about 3rotors breaking e-shafts for a while now and remember all the problems Brad had with his 10th anny turboed 20b swap, and I can easily do both engines and thier perephials for what it would take to do a 4rotor, besides, I think a tube framed car would be a more fitting application for a 4rotor engine, not a 3800lb convertible with stereo **** and AC.



...and the rotary gods wouldn't shat at me for putting a V8 in an RX modeled car, just can't get passed that...


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