Bevel Rotor Edge
01-03-04, 06:18 PM
#1
Weird Cat Man
Thread Starter
Bevel Rotor Edge
Has anyone had any experience in cutting a beveled edge onto a rotor near the side seal? Does this make any more power by allowing flow into the chambers earlier and lasting longer or is it mainly just to keep the clearances good if the eccentric shaft flexes?
My -thought- on the idea that it allows more power by influencing the effective port open/close time is that it wouldn't help that much because even if the port gets open a little earlier, the amount of volume that can pass through the narrow hole is not worth the trouble if you're trying to do this to gain power....
Brian
My -thought- on the idea that it allows more power by influencing the effective port open/close time is that it wouldn't help that much because even if the port gets open a little earlier, the amount of volume that can pass through the narrow hole is not worth the trouble if you're trying to do this to gain power....
Brian
01-03-04, 08:19 PM
#4
Originally posted by sccagt3
Guys have been doing it for some time in road racing.
Look closely at pictures of the new Ren. rotors or am I
imagining things?
Guys have been doing it for some time in road racing.
Look closely at pictures of the new Ren. rotors or am I
imagining things?
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01-04-04, 02:07 PM
#9
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Heres some info on thisclick here
01-04-04, 08:22 PM
#12
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Originally posted by RETed
What's the difference with this versus just porting the intake ports more?
-Ted
What's the difference with this versus just porting the intake ports more?
-Ted
01-05-04, 03:30 AM
#13
You'll eventually hit a limit on the opening side that you can't go past as well as the closing side before you get to the water jacket. Some people don't like to backfill them. The bevel depending on which side of the rotor it is done on may allow you to open or close it a few degrees earlier or later. The Renesis does not have the bevel running the full length of the rotor but rather at only one end of each side to only affect port closing.
01-05-04, 06:45 PM
#15
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Originally posted by j9fd3s
think of a roadracing class where you cant port the engine....
think of a roadracing class where you cant port the engine....
Seriously, if you bevel the opening end, the intake charge is going to be hitting a perpendicular wall, and that can't be good for flow...
-Ted
01-05-04, 06:54 PM
#16
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Originally posted by RETed
Oh, you mean CHEATING!
Seriously, if you bevel the opening end, the intake charge is going to be hitting a perpendicular wall, and that can't be good for flow...
-Ted
Oh, you mean CHEATING!
Seriously, if you bevel the opening end, the intake charge is going to be hitting a perpendicular wall, and that can't be good for flow...
-Ted
01-05-04, 08:42 PM
#17
In theory it might not be all that good for flow but in actuality it kicks ***. You can only go so far on a NA aplication because you got to balance increased flow over lost in compression but on a boosted application you can go very wild!
You must re-balance the rotors once it's done though.
I've seen a street ported 12A make 217 rwhp with that done to it. On turbo aplications I'll just say it makes a huge difference. It gives you all the benefits of a small secondary BP without any of the drawbacks. I've also noticed that the motors become a lot more fuel efficent, less fuel for the same power.
The 1st time I heard a motor running with it done I swore it was bridge ported.
You must re-balance the rotors once it's done though.
I've seen a street ported 12A make 217 rwhp with that done to it. On turbo aplications I'll just say it makes a huge difference.
It gives you all the benefits of a small secondary BP without any of the drawbacks. I've also noticed that the motors become a lot more fuel efficent, less fuel for the same power.The 1st time I heard a motor running with it done I swore it was bridge ported.
01-05-04, 10:35 PM
#18
Banned. I got OWNED!!!
Originally posted by crispeed
In theory it might not be all that good for flow but in actuality it kicks ***. You can only go so far on a NA aplication because you got to balance increased flow over lost in compression but on a boosted application you can go very wild!
You must re-balance the rotors once it's done though.
I've seen a street ported 12A make 217 rwhp with that done to it. On turbo aplications I'll just say it makes a huge difference. It gives you all the benefits of a small secondary BP without any of the drawbacks. I've also noticed that the motors become a lot more fuel efficent, less fuel for the same power.
The 1st time I heard a motor running with it done I swore it was bridge ported.
In theory it might not be all that good for flow but in actuality it kicks ***. You can only go so far on a NA aplication because you got to balance increased flow over lost in compression but on a boosted application you can go very wild!
You must re-balance the rotors once it's done though.
I've seen a street ported 12A make 217 rwhp with that done to it. On turbo aplications I'll just say it makes a huge difference.
It gives you all the benefits of a small secondary BP without any of the drawbacks. I've also noticed that the motors become a lot more fuel efficent, less fuel for the same power.The 1st time I heard a motor running with it done I swore it was bridge ported.
How does it work on PP's LOL (Thats a JOKE boys !!!)
01-06-04, 01:17 AM
#19
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Ya good joke. Any ways, thats some pretty impressive power out of the street ported 12a > 215 RWHP. That must have been a pretty serious street port probably formed mostly out of epoxy and a serious exhaust port. Very good to hear though.
CJG
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01-06-04, 03:34 AM
#22
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Originally posted by crispeed
In theory it might not be all that good for flow but in actuality it kicks ***. You can only go so far on a NA aplication because you got to balance increased flow over lost in compression but on a boosted application you can go very wild!
In theory it might not be all that good for flow but in actuality it kicks ***. You can only go so far on a NA aplication because you got to balance increased flow over lost in compression but on a boosted application you can go very wild!
Loss in compression? Do you get that crazy on the bevel? I'd think the side seals would be compromised or increase in blow-by is significant?
-Ted
01-06-04, 07:29 AM
#24
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Originally posted by crispeed
In theory it might not be all that good for flow but in actuality it kicks ***. You can only go so far on a NA aplication because you got to balance increased flow over lost in compression but on a boosted application you can go very wild!
You must re-balance the rotors once it's done though.
I've seen a street ported 12A make 217 rwhp with that done to it. On turbo aplications I'll just say it makes a huge difference. It gives you all the benefits of a small secondary BP without any of the drawbacks. I've also noticed that the motors become a lot more fuel efficent, less fuel for the same power.
The 1st time I heard a motor running with it done I swore it was bridge ported.
In theory it might not be all that good for flow but in actuality it kicks ***. You can only go so far on a NA aplication because you got to balance increased flow over lost in compression but on a boosted application you can go very wild!
You must re-balance the rotors once it's done though.
I've seen a street ported 12A make 217 rwhp with that done to it. On turbo aplications I'll just say it makes a huge difference.
It gives you all the benefits of a small secondary BP without any of the drawbacks. I've also noticed that the motors become a lot more fuel efficent, less fuel for the same power.The 1st time I heard a motor running with it done I swore it was bridge ported.
Now I'm tempted to try this out for my 1/2 bridge turbo project.
