How Do You Get Some Revvs Out Of A Rotary.
07-03-2003, 01:40 AM
#22
Senior Member
Join Date: Nov 2002
Location: Cincinnati, Oh hi hoe!
Posts: 2,286
There was a fellow who joined this board who had a first gen revving 14k plus, Said he revved it to 16k-18k and sheared off the flywheel, otherwise he'd rev higher...
Posted a cool pic of a nice flamage from revving high...
Whatever happened to him?
Posted a cool pic of a nice flamage from revving high...
Whatever happened to him?
07-06-2003, 12:59 AM
#23
Senior Member
Join Date: Dec 2001
Location: Okinawa Japan at McDonalds
Posts: 472
I tuned a car for a friend that wasn't happy unless he was reving over 10,500rpm. He would usually take it to 11,500rpm. The motor was in the car for over a year, and was only taken out to check out the internals. It was an secondary bridged Cosmo 2 rotor motor with a T51S in an FC. Forgot to mention that this was with all stock parts, and the rotor tips clearanced. I actually reved to about 10,500 on my bridge ported FD motor, it just seemed to like it.
07-06-2003, 07:17 PM
#24
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Join Date: Jan 2003
Location: London, Ontario
Posts: 2,871
Why?
If you make peak torque at 8000 RPM and peak horsepower at 10000 RPM with a peripheral port, why would you rev to 14000?
You don't even sound like you intend to do a peripheral port. With a bridge or streetport your peak power will be at an even lower RPM.
Shift gears.
BTW, when they "seals" for a rotary engine, they're not talking about gaskets.
If you make peak torque at 8000 RPM and peak horsepower at 10000 RPM with a peripheral port, why would you rev to 14000?
You don't even sound like you intend to do a peripheral port. With a bridge or streetport your peak power will be at an even lower RPM.
Shift gears.
BTW, when they "seals" for a rotary engine, they're not talking about gaskets.
07-06-2003, 07:23 PM
#25
Senior Member
Join Date: Dec 2002
Location: Houston Texas
Posts: 1,142
Originally Posted by TYSON' date='Jul 6 2003, 04:17 PM
Why?
If you make peak torque at 8000 RPM and peak horsepower at 10000 RPM with a peripheral port, why would you rev to 14000?
You don't even sound like you intend to do a peripheral port. With a bridge or streetport your peak power will be at an even lower RPM.
Shift gears.
BTW, when they "seals" for a rotary engine, they're not talking about gaskets.
If you make peak torque at 8000 RPM and peak horsepower at 10000 RPM with a peripheral port, why would you rev to 14000?
You don't even sound like you intend to do a peripheral port. With a bridge or streetport your peak power will be at an even lower RPM.
Shift gears.
BTW, when they "seals" for a rotary engine, they're not talking about gaskets.
07-10-2003, 10:16 PM
#26
Senior Member
Join Date: Jul 2001
Location: S. Florida
Posts: 629
On a slightly related topic, I'd like to get a bit more revs out of my engine given the size of the ports and turbo I'm using. It's been rebuilt, clearanced, using Cosmo plates/housings plus REW stationary gears, oil pump, etc...Not balanced with Mazda OEM bearings, Atkins 2mm seals, nothing special but everything new. Am I really pushing thigns to go to say 8500 to 9000 rpm with this setup? I've always heard there were oil system issues with the stock setup and one would need, at the very least, to run race bearings (extra deep grooves). Thoughts?
07-10-2003, 10:51 PM
#27
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Thread Starter
Join Date: Mar 2003
Location: South Florida
Posts: 25
peak power and torque mean nothing to me much anymore.
rpm's give flexibility when going down a straight, and a corner is approaching, you can hold out in a gear longer, instead of shifting, and reshifting again as you enter the corner.
rpm's give flexibility when going down a straight, and a corner is approaching, you can hold out in a gear longer, instead of shifting, and reshifting again as you enter the corner.
07-11-2003, 10:46 PM
#28
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Join Date: Jan 2003
Location: London, Ontario
Posts: 2,871
That's right, but you're wanting to go 40% past your peak HP RPM. That's about one full gear ratio. You screwed up the corner, you're in the wrong gear. If you only go with a street port, you are wasting your time. Your power peak will be somewhere around 7500 RPM with a BIG port. At 14,000 RPM you will have nothing left.
The Yamaha R6 came out with a 15,500 RPM redline with a 12,500 RPM HP peak. Less than 25% rev past, the next gear might be too tall. Here it is more useful.
The Yamaha R6 came out with a 15,500 RPM redline with a 12,500 RPM HP peak. Less than 25% rev past, the next gear might be too tall. Here it is more useful.
07-14-2003, 09:40 AM
#30
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Join Date: Jul 2003
Posts: 1,882
Originally Posted by TyresmokinRx7' date='Jun 21 2003, 01:13 PM
I've hear and seen a 13B peripheral port rev to 10500 RPM, but he had spent close to $12,000 on the motor. Poor bloody motor, now that's going around fast, 175 times per sec for 6 seconds, then she 