Piston eng. vs Rotary eng.

[Bville701]

I think the record in A/GT is around 253 MPH or so.   

[MAZDA1807]

It might get the record.  It has over 670HP.

[Bville701]

That's a lot of power. You might be able to get it with that.   

[MAZDA1807]

My car might fly at those speed.  I don't Know, guess I'll have to find out.

[Bville701]

Just put somemore weight in it.     

[MAZDA1807]

The Mazda already has almost 1000lbs of weight in it.  I supose it could take some more.

[Bville701]

The Kugel's Firebird weighed a little over 5000 lbs.     

[MAZDA1807]

Thats heavy, my car only weighs 3600-3900lbs now.  I don't know if i have the room for that extra weight.

[Bville701]

That's pretty heavy too, and if it handles well I wouldn't change a thing.   

[MAZDA1807]

The car handles pretty good depending on the tire/rim ste up on the rear.

[kiwi]

Is there any logic behind why there would be a multiplication factor for rotarys, and not two stroke piston engines?

[RichFox]

This subject has really been beaten to death in the past. Maybe you can still find it in the archives.

[MAZDA1807]

Is there any logic behind why there would be a multiplication factor for rotarys, and not two stroke piston engines?

The SCTA I believe was following NHRA witch did the same at the time era.  Now NHRA has no restriction for the engine, it must run in the bracket class.  SCCA still multiplies the engine, only by 2, as well as FIA, witch is only 1.5.
                                                                                           Peter

[NathanStewart]

Is there any logic behind why there would be a multiplication factor for rotarys, and not two stroke piston engines?

Nope. 

It was a matter of protecting what was already established by restricting the new and unknown.  Imagine you're on the SCTA board back when the rotary motor started to make its presence.  Word on the street is this little motor makes hellacious power and spins to 11,000 rpm with only 60 cid.  Man oh man that's going to put a world of hurt on the old pushrod/connecting rod guys.  So what did they do?  They looked at it, realized it had a three sided rotor, and said "Well this thing has a three sided rotor so it must some how pump out three times as much air so lets take the actual CID and times it by three".  Brilliant! 

Fast forward a whole bunch of years and they (you know who you are) realize that they made a boo-boo and attempted to fix it.  The change went through all the appropriate channels and was okay'd TWICE before being rescinded.  WTF?  A little technicallity screws everything up.  Somebody starts crying the blues because they're going to lose their record. 

But it's okay.  Pete (the OP) is going to handle the record in question.  We wouldn't want anyone to get their feelings hurt because they lost their record to a RULES CHANGE (which has happened MANY times before).  Oh no.  Pete is building a new race car and a new race motor just so he can go out and take the record away from it's current holder.  This way the record will be Pete's and when the rotary restriction rule change comes down the pipe again guess who will be losing his record?  Pete will so no one will have any reason to cry about it.

Pete, I wouldn't worry too much about it man.  They know they were wrong, they tried to fix it, but then they screwed it all up.  Just follow through with your plan.  It means parking the RX-7 but oh well.  You'll go plenty fast in your new Ford Ranger.

Now if only we can clean up this "Tuner/Sport Compact" disaster.  Talk about FUBAR...   

[MAZDA1807]

Thanks for the support Nathan.  I do believe that there is only one N/A rotary engine record left.  E/M/M/P S&P Racing at 151mph(elmo).  The other two have been beat, E/GT Racing Beat at 178mph(bonneville) and E/GL Steve's Machine(elmo).  Both which have been beaten by V8 engines, one by 12mph and the other by 10mph.  I believe that it's pretty unfair to penalize an engine that you can't do much to.  That's right not much, but porting.  It has no cylinders to bore, no crankshaft to stroke and no camshaft to regrind.  It's just an air pump.