ray green

iTrader: (14)

My original 12A is pushing twenty years and running strong. Why would anyone want to put pistons in an RX-7?

Metallic_rock

see, now if I was going to put a piston engine in an Rx-7, I'd see about getting a 3000GT VR4 engine or something like that with a whole lot more hp than 200. Make it have an un-godly amount of power with lots of torque. Make it worth the time and effort.

Thats my other .02 if you want it.

mcnemar1982

I say go with the v8 dude! I have a mint condition 2nd gen gtu model that i am putting a 400 hp lt1 v8 with a 150 shot of nos in it!!!! GO WITH YOUR FEELINGS!!!

spyder_doo

I've got a soon to be 393 with a T-5 tranny....but right now it's a 351w with a AOD and turbo II rear end in a '79 7. Runs real strong...pulls mustangs and camaros pretty well (stock that is). I hope to be getting about 450-550hp on all motor and then possible throwing a 150 shot to it...just going to make it very fast but still streetable for now

spyder_doo

I didn't realize this thread was sooo old lol

trochoid

iTrader: (6)

Before you get the BS flag, not for the pistons, explain how you have a TII rear end, that is irs, in your originally solid axle 79.

Alak

iTrader: (9)

Lots of guys put V8's in everything. Why not try a 6 Cylinder? For example: Those 300cui Straight 6's out of the F-150's has a tremendus powerband.

Im All for motor swaps. I'd just like to see someone do something different. I've seen a V8 in just about anything to the point that It really does nothing for me, no matter the power.


The most amazing car I seen last year was a 5.0L Mustang Chassis with a 2.3L Turbo Engine in it with an Automatic. Ran low 13's far above Sea Level. THAT was impressive. Had it had a V8 in it? I wouldn't have given it another thought.

Few years ago I seen an FC come out with a 350 in it. I didnt even give it a second thought. Was it fast? Well, 300 HP at the wheels smokes any tires. But when a sub 200WHP RX-7 spanks it, thats when my imagry of V8 + RX-7 went out the window.

Thats just my thoughts anyhow. If you do the swap, make it count for something different.

REVHED

Pics would be good too.

I say he's a troll.

Phiber Optik

iTrader: (2)

Ok first step is reversing your crossmember for oil pan clearance.

Then depending on how much money you want to spend and how fast you need it done, you can either buy engine mount & trans mounts from grannysspeedshop.com or get the designs from torquecentral.com and build them in an afternoon.

As it's been said the easiest swap is a 5.0L 302 HO with an AOD, this also a light V8 motor, but whatever motor you choose put the heads as close to the firewall as possible.

Examples of light motors are Caddy 4.9 (aluminum) and the Gen3 GM (LS series)

Some people say the weight distribution will be thrown off, but someone swapped an LS1 in his FD and it is lighter now, then when it had the 13b in there!

spyder_doo

well everything under the car has been changed over to the tII setup...I didn't do the work though. I weighed the car a few weeks ago and with a stock truck engine and AOD it weighed in at 2500 with me in it.

spyder_doo

That's just what I was told about the rear end...I didn't own it when it was installed. Aparently it's got LSD though.

trochoid

iTrader: (6)

If the car still has a solid axle, it does not have a TII rear end, period. If you got sold that line by the installer, I would be checking the rest of the car for misrepresentation.

2wankel

iTrader: (1)

Do what you want with the seven, but do not call the rotary unreliable. That is just spreading misinformation. Nothing but lies!

LokiRx7.1

iTrader: (1)

Good God, I am really tired of the whole V8 thing, And let me tell you why,

Its been done TO DEATH if a car has existed odds are someone has dropped a V8 in it. And yes V8's naturally produce more power than a rotary. No a High output V8 will be just as unreliable as a High Output Rotary, and you cant argue that! I owned a Camaro IROC-Z with a fresh 350 GM crate, I had it pushing 500 HP and I tell you what I broke damn near every part on that car! My friends had an assortment of V8 powered vehicles, so did my parents. If you had a V8 you were friends with your mechanic, and thats something alot of the I-6 guys joked about. They werent always as fast as us, but those I-6's lasted forever.

A V8 going fast in a straight line, no longer impresses me. A V8 carving corners, no longer impresses me. Its like going to a gun fight and you already have the biggest gun, everyone knows their screwed. But when a Rotary or a 4 banger or a 6 smacks down a V8, I am impressed. That is like the dorky nerdy kid, beating the hell out of Chuck Norris.

I have no problem with what you do to your car, Its your car, and if you want to treat it like a piece of meat you may do so. I am not flaming, dont take it that way. But what I am telling you is if you can take something, that wasnt impressive before. And had little hope of being that way, and sqeezing crap loads of horsepower from something everyone told you wouldnt work, thats impressive. My FB has close to 140,000 on the odo and pushes 200+ HP as a DD, I love it I wouldnt have it any other way. I am a purist, in everything I drive, I will always be that way. Oh and yes you may be faster than me, but I am getting old, so I dont notice the difference

TomH

I also own a 240Z with a Chevy 350 and to be honest, my RX7 is more fun to drive. It's a blast to take the Z out and mash down the gas pedal and absorb the g-forces while you hold on for dear life. It's also great fun at the track, but for taking a long drive on country roads or any ride where you'd rather not risk jail time or certain death, I take the RX7. The V8 makes a 240Z feel like a big American car even though it still weighs less than 2500lbs. Definitely less of a sports car feel. All that power and an American gear box take the fun out of shifting as well. And automatic transmissions in a sports car, that shouldn't be legal unless you've had your left foot amputated. What others have said here about reliability is true, you don't need a built up a V8. My engine is pretty much stock and I can't even imagine what you could do with 500HP except drag racing. (and bragging rights).

You should also check out http://www.hybridz.org/

LokiRx7.1

iTrader: (1)

mostly bragging rights, the reason everthing broke is it was a DD for sometime. And your right, 500 HP is ridiculous, anyone who has had that power knows that it makes the car undriveable. I hated that IROC, for a DD it sucked ***, and on the track it was a beast, but every other V8 had that much power. 500 HP and a 12 sec car, stupid.... an Rx-7 can do that with FAR less power. Jesus Padilla has about 450 HP right? 10 sec car, that is DAMN impressive.

But yeah after the IROC left the track, by its own power, or by tow truck. It always ended up in the garage....

13B100shoot

I think people that swap v8 engines into rx7, are not suppost to be here

vipernicus42

iTrader: (4)

There's a section specifically for this, so I'm moving this thread there before people get any more pissed off.

Jon

Brismo7

iTrader: (2)

i thought it was already in the right section? other engine conversions. :shrug:


~Steve

Crash Test Joey

iTrader: (1)

All I have to say to this thread is HHAHAHAHAHAHAHAHAHAHAAAHAHAHAHA!!!!

20B Junkie

Lets open our minds.....and about the V8 thing being done alot, who the hell cares, its proven its self and thats why people continue to do it.

The 5.0L 302 sounds good. A friend of mine had a 5.0L 302 foxbody stang that he beat the **** out of all the time even with high mileage on it and that engine still ran strong without any probs.

2wankel

iTrader: (1)

Yes, lets open our minds. No other platform out there is as good as the Rx-7. Thats why people put V-8's in them.

Nihilanthic

Its about time everyone caught on

custom13B

I agree. Lots of RX-7'Purists" have V8 issues but really theres good reason why this is becoming so common! Ive owned many RX-7's and rebuilt many rotaries. Ive also owned many GM's and rebuilt those too. Bottom line for me is cost and availability. I can visit my local junk yard and count a few hundred donor cars with V8's wether I need a alternator or set of heads. There is 1 RX-7 there thats so picked over it isnt funny. Also budget is a major consideration for me. The rotary is unique and with that comes extreme cost to rebuild it. Im a good fabricator and am making almost everything for my conversion. If anyone dosnt like my Rx-7 V8 thats too bad! I say put your money where your moutn is and try beating my track time! Shawn