ramello

iTrader: (1)

the one thing that would concern me on that is you would have to tear up the interior because the 'shifter' for the 4wd/2wd looks pretty far forward on that setup and taking in consideration where the gear shifter is that would put the 4wd/2wd shifter up under the dash....

ramses666

iTrader: (1)

Needless to say U need a completely fabbed front end & engiine bay. I saw something in a picture I don''t have, but the firewall was totally relocated & engine moved to accomodate the front end. Radiators & all were relocated I think, but can't be sure.

Ramses666

full-cruise

iTrader: (5)

interesting ..

lax-rotor

iTrader: (1)

I think you might be thinking of the 20B setup. As soon as I find it I will post up a picture. But as far as I can tell the tube chasis seems to reduce the total amount of space available for the engine to be placed in. (My thinking being, it's using the stock body panels, but the engine sits in the same place pretty much while there is a tremendous amount of space inbetween the radiator and the engine--Perhaps to allow the mounting of the front differential to mount as close as possible to the Rack). There also seems to be another set up where they change over from a single radiator to a dual radiator setup. Either that or it might be extra cooling pieces for something.

I'm an idiot, it was in plain sight!

ramses666

iTrader: (1)

Wow! thats the picture I was thinking of I believe. Pretty interesting.

Ramses666

Slammedblk7

iTrader: (7)

Here is Amemiya's old AWD car, just sits in the back...probably still there too!

Slammedblk7

iTrader: (7)

And in that magazine picture, the car wasnt 100% finished, you can see the IC coupler not even connected.

lax-rotor

iTrader: (1)

Any input on how the AWD is accomplished with that 7? j/c

full-cruise

iTrader: (5)

http://cp_www.tripod.com/rotary/pg15.htm just alittle more i looked up.. enjoy

reatrdedspleen

This is really interesting, id love to see upclose first hand how exactly the FWD is set up..

And id love to feel how an AWD FC handles.. i can only imagine!

NZConvertible

Man I hate these 4WD FC threads. They're 95% BS and ignorance, and it's the same BS and ignorance that's been posted in all the other 4WD FC threads that obviously weren't searched for...

No RX-7 has ever won the WRC, let alone a 4WD one. The only significant record held by a 4WD RX-7 is Rod Millen's FC that won Pikes Peak in 1991. All of the RX-7's that completed in the WRC were RWD.

It should be pretty obvious that without moving the engine back (i.e. major body modifications) a 4WD RX-7 will no longer have a perfect weight distribution. This is a moot point however, as the engine must be moved either backwards (expensive) or upwards (expensive and stupid), as the front axle line currently runs right through the engine. A couple of minutes looking at your car instead of an internet forum would've shown you that...

And those items do weight a lot. You'll also need to replace the front uprights and strengthen the front suspension as neither are designed to transmit power.

Those pics are of Millen's FB drivetrain, not FC. The two cars were totally different. And not that it really matters, but since only half the power goes to the rear wheels, the loads on the rear drivetrain are not much greater than stock. The FB's PP 2-rotor made ~300hp (~150hp to the rear wheels, ~25% greater than stock) and the FC's turbo'd 3-rotor made ~500hp (~250hp to the rear wheels, ~40% greater than stock). There are plenty of 150hp FB's and 250hp FC's with stock rear ends.

That's Millen's original car, or what’s left of it. RE-A bought it and extensively modified it for circuit racing. It's been here in NZ for years and doesn't look much better than it does in that old photo.

lax-rotor

iTrader: (1)

Actually, they were searched for otherwise I wouldn't have posted it.
I was going off of memory, and as I did research on it I see you are correct in the Pikes peak... But then again you could have also looked at the second page of this to see that too.
Weight distrobution would depend completely on your setup and engine location. IF you move the engine back you have shifted weight off the fulcrum to the rear. When the added weight of the FWD is put back on you shift the new fulcrum back towards the front. How much so depends on how heavy the pieces you use and how far back you made the engine sit. In theory the 50/50 can still be maintained, it would require fore thought and smart modification, but is possible.

I knew that modification like that would be necessary, especially considering that the steering rack sits right on top of the front subframe. Heavy modification was already known to me. It's the specifics that I was looking for that you seem to conviently omit from your critique. For instance you haven't confirmed the 4wd transmission He used. Nor the modifications to the front end (IE power delivery, but thank you for the specifics on chasis regidity for the front clip. That is something I hadn't previously considered and hence why I bounce it off the internet forum). However I do appreciate your information listed here:
Depending on transmission type and differential setup power distrobution to the wheels is different than 25% to each wheel. For example AWD transmission works by supplying power to the rear right and front left, once they break traction the other wheels pick up the slip. Hence why on some commercials you hear the slogan "...From the wheels that slip, to the wheels that grip."

j200pruf

iTrader: (4)

It wouldn't be an RX7, but it sure would be a hell of a lot easier to drop a 13B or 20B into a subaru. There is a thread on here with some pics. Just seems like it would be a lot more feasable to drop the engine in to and AWD car than to put a AWD drive train in to a RWD car.

lax-rotor

iTrader: (1)

That's a possibility, however would the subby trainy handle the 13B? I'd imagine it would be okay during normal abuse, but once you start hitting the big digits like some people on the forum it would be a gamble. I've been trying to figure out other ways of trying to accomplish this besides throwing the engine back and doing the extrememly heavy modding. The only thing I can figure is a modified transmission with two front drive shafts that spin in opposite directions, each one running on either side of the engine. That may be able to work, but I still have some things to work out on it before I even draw up plans for it.

I think a big concern is some thing NZvert brought up. And that's the reinforcement of the front end to handle power. If too much power is transfered to the front then suddenly your front end will want to tear itself off from the rest of the car, throwing your entire suspension geometry out of whack. Not to mention the front hubs would need to be replaced or heavily modified to accept a transaxel.... Lots of things to think about.

If I had a subby to look at i'd probably focus on how they did their AWD, and more specifically how they have framed the front suspension to handle the load. /end random thoughts i've had on the subject so far.

j200pruf

iTrader: (4)

Well, there are quite a high horse power subbies running around the web. And the one that has an REW in it looks like it came from a combied factory effort of subaru and mazda., really the install is great.

Juiceh

iTrader: (4)

classicauto

iTrader: (3)

So thats what that hissing wuz!!

lax-rotor

iTrader: (1)

lol, i wondered why this thread got resurrected! *Phenoix down*
/and done!

Spectator

iTrader: (1)

Ok, if no-one is saying anything about this then I will.

WTF!

See how far up the engine is? Did no one notice that? Weight distribution must wierd, having the engine after the front wheels and all...

Juiceh

iTrader: (4)

The engine has to be either moved far forward or far backwards to clear the front drive train components. No one has commented on that probably because it was covered in a different thread.