So when I dyno'd my car my first pull was 130HP to the wheels. I brought the car to 8000rpm. Now I hadn't brought it that high before, hell I barely bring to 7k on a regular basis. And it stayed in the range for about 5-6sec I'd say. MUCH longer than normal anyway.

Well after that, my next pull was 135hp to the wheels. I was surprised at a 5hp difference. There was nothing different about the runs except it was my 2nd run. I was the only one there with such a high HP difference between runs. It usually varied between 1-1.5HP for the other guys.

So I guess reving it high does help these motors out.

 

I doubt its good for the engines but hell it got you a gain so its a plus.

 

it will not damage u engine by bringing it to redline alot these cars are made for high rpm's i saw a first gen with a monster tach follow the factory rpm needle then an the factory needle bruied the monster tach went to 12 grand

 

In alot of cars, the 2nd run allways makes more power, as afterword the plugs are clean. I think the same thing happend to blake when he dyno'd his car. CJ

 

Revving to redline rotaries love, but past isn't always good, but I think they're good for occassional 10k RPMers every once and a while. Just not a lot of em

 

Yea, but see, I don't even make peak horsepower until just AFTER my 7000rpm redline.

 

logic tells me that there is a reason for the markings at the redline... nothing says the car cant perform at the redline but i believe it wasnt meant to stay above the redline in the course of rpm's. if that was the case u wouldnt need a mark indicating where the redline mark is at.....dont ya think???

 

It could also be that on a stock non-turbo there isn't much usable power after 7000rpm. So why not make 7k the redline. The engine will go past 7k safely.

 

Dont' worry about seven grand, piece of cake on a rotary. I frequently take my first gen up to eight grand. The engine is built to rev. Ask anybody who races them, they love to rev.
hanman

 

Hey Node let us know when your clutch comes up and takes off your legs and Nuts. There is a reason for the redline. Not all the parts on the car can handle the RPMS. If your inclined to run the razors edge I suggest getting a scatter shield and or a Kevlar jock strap. Anything over 8300 RPMs should have a scatter shield.

 

Thankfully, most rotary engine cars have the bellhousing pretty far forward compared to where your feet lay.

I think the weakest link in the system is the pressure plate/clutch area. Rob@pineapple had one come apart somewhere near 13.5 rpms in his Peripheral engine years ago. Peices of clutch pressure plate, whent every where. I guess they never did find the starter.

A scatter sheild is a good idea, but if you keep it under 10k it should pretty safe. As long as the motor was built for it.

Node- show me a dyno graph of a stock port engine that will even make and decent hp to 10k.

CJ

 

Guys, there is a reason for the red markings on the dash That means that on a STOCK motor you have gone past the peak HP/torque point, and now you are just wasting gas and possibly reducing your engine's lifespan If you are not stock, then you can revv it up to whatever your tuner says, because a mild port doesnt mean you can revv your rotary up to 12K
Just take a look at a stock motor's dyno-chart. Peak power comes around 6500-7000 (on NAs and TIIs). So whats the point in going past that ? Again I must say that this applies to stock motors....

 

ok i'll prolly sound like a dumbass (already have before so its nothing new) but ive heard people (forgot who) who have said that redlining rotary engines very often is actually better for the engine itself, can anyone explain?

 

The factory fuel injuection wasn't designed to supply fuel to the engine at 8000 RPM or higher. Sure the engine might spin higher than that but it probably isin't making any usable power and I would venture to bet that it is running lean. High revving will probably help with carbon deposits that may be trying to form but the sustained high rpm will wear the engine out sooner, maybe not to the point where you actually notice it but common sense dictates that it will not last as long. Having said that I enjoy over revving my engine but on my 88 GTU it doesn't do any good to go over 7000 RPM. You can feel the engine quit making usable power around 6500.

 

My engine pulls to and past it's peak HP at 7100rpm quite nicely. In fact, on the dyno when it got closer to 7k, the rpms increased very smooth and got quicker. I ran it to 8 grand the first time and the engine didn't skip a beat. It still wanted to rev.

 

I didnt mean stock, but should had said that.
Doesnt the 26B in the 787B go to like 13K or so?

 

thanx ace that was my point excatly.......since most of us or at least i have a stock motor......

 

The 4 rotor saw no more than 9k rpms on qualifying. CJ

 

MMMmm.... 787B... droool.....