OK, there has been a lot of flaming going in the V8 conversion threads. I've started this thread so that we can keep the other threads OT and discuss V8 vs Rotary preferences here. Have at it.

 

someone is gonna say its not a rotary or 50/50 weight dist.the only argument they have and not even a valid statement.

 

v8s suck!!!!

 

V8 has more power stock, but weighs more and is very reliable.

Rotary is less power stock but still alot, weighs less, and is not so reliable is you do not take care of it.

 

Once you put a piston engine in an Rx-7 it is no longer an Rx-7. Thus I don't think you can compare a V8 powered 3rd gen to a rotary powered 3rd gen because there is no such thing as a v8 powered 3rd gen. It's like putting a monkey’s brain in a human. That person will no longer be human.

 

If you put a rotary in a vette, would it become an rx7?

Didnt think so......

 

people with v8's on their fd yould change the emblems to :

I AM A BIG ***** !!!

 

This is not true. Please refer to V8 Lover's thread. He put his car on a corner scale. Maintained 50/50 weight distribution.

Also, somewhere in the depths of jimlab's V8 thread they discussed weights. Someone (turbojeff, I think) had a complete 13B-REW weighed at about 410 lbs, with all accessories. I've read on several places that a complete LS1 without accessories weighs around 390-400 lbs.

 

"A human with a monkey brain" would be a human with a monkey brain.

An RX-7 with a V8 is an RX-7 with a V8. It's just that simple.

V8's sound good with headers. You grow to like the sound of the rotary...

Rotaries smell\stink at startup after 10-30k miles. V8's only do this after they are well worn out, 100k+ miles.

V8's pretty easy to work on. Almost any mechanical shop can do the work. Only a relative few shops can fix a rotary motor.

Part of the RX-7 legend is the rotary engine - I'll agree. It's different and sets you apart from everyone else. V8's are pretty common.

Appears that the weight balance is not affected by installing a light V8...

V8's have more torque at lower RPM's. Rotaries have less...

Rotaries tend to breath well at higher RPM. Only modded V8's can do this.

Gas mileage - toss up. My rotary gets pretty bad mileage compared to a V8 Firebird.

The rotary can be unreliable in forced induction applications. V8's can make the same power w/o forced induction. (NA rotaries are very reliable).

Not many of you must be fans of Hot Rod Magazine or similar. They are always pulling and exchanging motors

New reman motor $1900-$2200 + labor. Looks like $3500+ for V8 & trans

 

I've been doing some perusing on the Granny's website and I really do like what I'm seeing. As much as people who own rotary FD's would disagree with a piston engine, the reliability factor of going with a V8 seems very attractive. At the very least this debate deserve heavy consideration.

 

Are those weight numbers correct? It seems like the rotary is lighter than that?
The cool thing about V8's is power(low end especailly), reliability, cheapness of mods. The weight thing is still an open topic though. I would have said that a rotary is a lot lighter, but I don't know for sure, as i've never weighed it.
Rotary's rev high, are insanely smooth, make good power, although reliability is and forever will be the question. Again, the weight thing is still up for discussion.

 

Glad someone made the correction about the v8 weighing more, I was going to but you beat me to it. I don't know how this myth got started(v8 weighs more than 13B) but as stated it has been proved to be wrong.

I love to see people with 13B's making gobs of power but at the same time I have nothing against anyone putting a v8 in their car as A.) It's their freakin car and B.) It's a mod that should only increase the cars performance/reliability, not hurt it.

 

shifting @ ~5000 rpm isn't my thing...

 

It's just not the same. period.

You have a problem with people who have sex changes?

I have a problem with cars that have sex changes.

 

The Turbo 2nd gen bastardized the RX7. The 3rd gen just put icing on the cake. The RX7 started as a NA rotary. All this turbo stuff just ruined a great car.

Once they put a turbo on it why not put in a V8?

 

Speaking of sex changes... My RX7 has ***** NOW!

BTW, my car is 70 lbs. LIGHTER in the front!

 

I read through this thread, and I came to a few conclusions:

In an RX-7, the RX stands for Rotary eXperiment. If you put a piston engine in it, it will effectively become a PX-7, Piston eXperiment, just like any Air Force jet with the president on board becomes Air Force One, and a Navy jet would become Navy One.

Aluminum block piston engines are almost as light as rotary engine.

Originally posted by Kiflin
Any engine is "not so reliable if you do not take care of it." That was a bullshit analogy.

Everyone is free to do what they wish to do with their car.

Everyone is free to flame anyone who puts a piston engine in a RX-7.

People who put piston engines in RX-7s are free to ask not to be flamed.

People who flame people who put piston engines in RX-7s are free to continue flaming them. Harder.

Life's a bitch

 

rotarys are ment to stay with the car.

the car was designed for only a rotary and no other.

V8's have torque and high HP but almost everybody has one.

im hoping people who bought this car bought it because of the styling, and the performance of the engine

reliabilty is another question........still a rotary properly taken care of can last.......but if you want to put a v8 in to improve performance, why not just take car of that little rotary?

BE DIFFERENT!!!!

ALI

 

then you die.....that's why we get high - NAS (rapper)

ALI

 

Life's a Bitch

Be a pimp

 

this is not an attack on you. this is just a request for clarification or correction. while reading through this thread, this post just struck me, that's all.

well, i'm not familiar with the thread you're referring to, but a 50/50 weight distribution does not mean that the overall weight did not increase, so this doesn't prove anything other than that guy took the time to arrange things in the chassis to keep the car balanced.

also for the weight comparison, if those numbers are accurate (i know an "old" 13B weighs about 295 pounds, so i don't see why an REW with all ancillaries wouldn't weigh 410, as you stated - but i've never weighed one) ... anyway ... my point is this, you obviously can't run the LS1 without ancillaries so that 390-400 will easily approach 550 pounds (most likely even more). so the V8's are heavier. there's no getting around that. i can lift a 13B and carry it by myself, (albeit, not more than a couple yards at a time.) i can NOT lift a V8 by myself ... PERIOD!

about the conversions ... project84 said it best. it's your car, and you have the right to put a V8 in it. however, we have the right to flame you if you do. just accept it! if reliability is such a "BIG ISSUE" to these guys, then **** a rotary, **** a V8 and get a base model Civic or Corolla!

 

why would you buy a damn RX-7 if you just want to stuff a big V8 in it?

 

$500 or less for rolling chassis.....$3500 for 400hp 350ci and tranny....equals a 400rwhp one ton car.

Buy an FC and tune it to 400hp with $4000.

 

I shift at 7500 and run a V8. Motors never been opened up either.

 

when you beat a v8 you cant say " its only 1.3liters "