Tell me why someone could just forget the 13brew and even the LS1. Stay within the family and upgrade. Go Renesis . Anyone know if it's been done or if it's even a good idea?

N/A!!
Horseys: 238 @ 8500 rpm
Torque : 159 @ 5500 rpm
Redline: 9000
Displacement (cubic inches) 1.3L

Think of the possibilities! I've read about a Turbo Charged Renesis engine getting 1,400 HP!!! So why not? If you can put a LS1 Engine in a Rx7, you should be able to put a Renesis in too! Eh..eh..eh?

On top of the engine, I would take the neat leather bucket seats with the Rotary Emblem thingie in the headrest. Start modernizing one of the best looking model of cars ever built

 

The Renisis has yet to be proven a superior engine.

 

https://www.rx7club.com/showthread.p...hlight=renesis
https://www.rx7club.com/showthread.p...hlight=renesis
https://www.rx7club.com/showthread.p...hlight=renesis
https://www.rx7club.com/showthread.p...hlight=renesis
https://www.rx7club.com/showthread.p...hlight=renesis
https://www.rx7club.com/showthread.p...hlight=renesis
https://www.rx7club.com/showthread.p...hlight=renesis
https://www.rx7club.com/showthread.p...hlight=renesis
https://www.rx7club.com/showthread.p...hlight=renesis
https://www.rx7club.com/showthread.p...hlight=renesis


Ad nausium.

 

 

The problem still remains the same. A turbo rotary has a great chance of detonation when modified. That's why people are going LS1.

 

V8 is a juice, not a conversion option.

 

double post

 

Horseys: 238 @ 8500 rpm
Torque : 159 @ 5500 rpm
Redline: 9000


woohoo now what??? you still only got 238 hp and sh*t for torque as well as still no reliblity while a still costing quite a bit. LS1 puts out 300+rwhp+torque and thats in n/a stock trim. when will you little boys realise performance is more improtant then being different???

as for the argument "a Turbo Charged Renesis engine getting 1,400 HP" you will still have less torque and if you spend hte same money on a LS1, you would be closer to 2000-3000+hp

as for the argument "lighter weight and smaller size", its really not that much lighter and over 2X the amount if torque from a LS1 will more then make up for any weight difference.

as for the 9,000 RPM redline, ummm, up shift hahahaha honestly, who the hell cares if you can rev to 9krpm when gearing /torque is all which matters? why do you think a Z06 can do 180 while max rev is about 6krpm

 

or from an engine builder's perspective, why not get the renesis rotors (which raise your compression to 10:1) and utilize the increased mid/low end power on top of some rotary aviation seals and some solid corner seals, and goto town with the boost

just my $.02

 

beacuse you still wont have torque down low where it counts!

well that and reliblity and cost

 

sure you would, with the right port setup, you would have the same amount as a renesis, and you'd be driving a turbocharged car...

 

Increased compression and increased boost is not a good recipe for a long lasting engine. I have never heard of any seals proven to be 100% fool-proof against detonation.

 

so learn how to tune your car, and that problem is no longer an issue

 

An increase in compression coupled with an increase in boost increases your likelyhood of detonation. When people turbo-charge a NA car, they typically lower the compression to to be able to run higher levels of boost.

 

Well said.

 

To answer the original question:
1. Engine mounting options are questionable. They are completely different.
2. ECU uncompatible and you will not be able to use the RX-8 ECU in an RX-7 (unless you make the RX-7 an RX-8, steering, brakes, etc.). In an RX-8 almost everything is controlled or monitored by the ECU. That has been our problem when trying to disable some systems for dynoing. The ECU controls the variable intake valving, and I doubt you can do that with any current aftermarket ECU.
3. You'd have to change the diff. gearing quite a bit - not sure if parts are available.

On the pro side, you would have a "cutting edge" engine for a change in an RX-7, not one designed over 10 years ago.

I don't see any reason low torque is a problem. You just gear it higher. As an extreme example note that a turbine engine runs with very low torque but at very high RPM - and I don't see any "gutless" turbine powered military jets or even helecopters.

 

oh I'd still make it a turbo charged car In anycase, no you cant get the same torque line as a V8 with a rotary, its jsut not possible, there is no replacement for displacement, but you knew that

 

nah its all good dude, just run the magical KDR anti detonation thingy (thingy because nobody even knows wtf is really is haha) and you can easily run 25+psi boost on 87 octane with absolutly no chance of detonation on a stock ecu+stock fuel injectors+stock fuel pump hahahahahaha

God I love the KDR device, its so magical yet only cost 500 bucks . Everyone should buy one! Just say NO to tuning and tunable ecu's as well as widebands and all logic and say yes to the magical device which has no description much less a photo or any real test other then the 1 or 2 other guys on this forum which claim that they actually got a hold of one and that it works like a charm.

 

"I don't see any reason low torque is a problem. You just gear it higher. As an extreme example note that a turbine engine runs with very low torque but at very high RPM - and I don't see any "gutless" turbine powered military jets or even helecopters. "



oh baby, i would not wanna top out in 1st gear at like 15mph, 2nd at 30, 3rd at 50, ect. to get the same torque as a LS1 would have.

btw: turbine is a totally different subject, check out the turbo bike (one of the bikes jay leno has) for more info i guess.

 

3ROTOR baby!!!

 

cost of a 3rotor though, i dotn have 40k todo the swap, sure it only cost 2-8k for the engine but to put it in and make it run how we want it to run... thats a horse of a totally different color!

 

Turbochargers belong on big trucks and bulldozers not on sports cars.

Turbos make throttle response dull and never produce a nice smooth torque curve. Throttle response and flat torque curve make driving a car more fun.

 

No matter how you tune it a larger displacement normally asperated engine will have a wider torque band, better throttle response and more reliability.

No amount of tuning lets you break the laws of physics.

 

I don't see many military jets inching along in rush hour traffic.

Turbines are great for steady state operation but miserable when the application requires rapid changes in RPM.

Same reason turbos suck on sports cars.

 

Well, there was a Chrylser Gas Turbine car..