what apex seals to run with bridge port
03-05-02, 06:59 PM
#5
Banned. I got OWNED!!!
Originally posted by RETed
If you're dropping seal pieces in the bridge, the bridgeport was done wrong.  You can use whatever seals you want with a bridgeport.
-Ted
If you're dropping seal pieces in the bridge, the bridgeport was done wrong.  You can use whatever seals you want with a bridgeport.
-Ted
All properly done bridge ports have a matching "relief" or eyebrow cut out of the rotor housing to allow the bridge ports to get some real flow area...i.e. not be restricted by the inner edge of the rotor housing, which blocks of allot of the bridge port if not cut back.
Hence this means you can only run 2 piece or 3 piece seals only with a partial bridge, not a full bridge (assuming the porting is done right!) ...If you want to run a full bridge then you need one piece apex seals, which do not require any support of a end piece by the rotor housing surface as the are no end pieces
So to sum up.
Partial Bridge = 1 piece, 2 piece, 3 piece apex
Full Bridge = 1 piece apex
PP = any construction apex
Bad Bridge with no eyebrow "relief" in rotor housing= any constuction apex (This type of porting method is useless, If your engine builder suggests this, go to another engine builder !)
03-05-02, 07:54 PM
#7
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Rice is right on. I feel better using 2-piece on a partial bridge, but that is just personal preference.
The rear rotor (on top as you assemble) will have the apex seals installed upside down. This puts the corner section of the apex seals towards the center housing for both rotors. It is a very uneasy feeling putting them in upside down the first time, but it is perfectly acceptable. The hurley seals are manufactured with the smaller apex piece much larger than stock, so you may feel better using those upside down -- or just use the single piece and sacrifice some compression.
The rear rotor (on top as you assemble) will have the apex seals installed upside down. This puts the corner section of the apex seals towards the center housing for both rotors. It is a very uneasy feeling putting them in upside down the first time, but it is perfectly acceptable. The hurley seals are manufactured with the smaller apex piece much larger than stock, so you may feel better using those upside down -- or just use the single piece and sacrifice some compression.
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03-05-02, 07:57 PM
#8
Super Newbie
I knew you had to do something with them, it slipped my mind. My engine is going to be a half bridge when thins one finally wears out. I'm tired of only being able to hear a bridgeport idle on my computer
03-05-02, 11:23 PM
#10
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Originally posted by RICE RACING
So to sum up.
Partial Bridge = 1 piece, 2 piece, 3 piece apex
Full Bridge = 1 piece apex
PP = any construction apex
So to sum up.
Partial Bridge = 1 piece, 2 piece, 3 piece apex
Full Bridge = 1 piece apex
PP = any construction apex
03-06-02, 03:40 PM
#12
Lives on the Forum
This is not something I would normally do on a turbo motor, but this piqued some questions...
If I'm reading everything right, the argument for less pieces is due to the fact that the part of the apex seal is NOT supported by the side housing due to the bridgeport???
-Ted
If I'm reading everything right, the argument for less pieces is due to the fact that the part of the apex seal is NOT supported by the side housing due to the bridgeport???
-Ted
03-06-02, 04:50 PM
#14
Super Newbie
Originally posted by Arpus
What does a bridgeport sound like in comparison to stock? (This is actually a request for the audio file, not a verbal description).
What does a bridgeport sound like in comparison to stock? (This is actually a request for the audio file, not a verbal description).
03-06-02, 07:06 PM
#15
Old [Sch|F]ool
03-12-02, 01:45 AM
#16
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If you Bridgeport a turbo motor, do you only bridge one side of each rotor? If so, which side? I thought the general idea is a Bridgeport won't work with a turbo, what do you have to do to get one to work? Is it only a small Bridgeport? Any info would be great.
03-12-02, 08:57 PM
#18
Old [Sch|F]ool
If I'm reading everything right, the argument for less pieces is due to the fact that the part of the apex seal is NOT supported by the side housing due to the bridgeport???
Not the side housing, the rotor housing. If you relieve the rotor housings to match a larger eyebrow, the apex seal corner piece will fall in to the relieved part of the rotor housing, since the corner piece is the final 1mm or so of the sliding surface of the apex seal. So if you run normal 2mm or 3mm apex seals, you can only have a relieved bridge port on one housing, and the apex seal must be oriented so that the corner piece slides up against the other housing. Or:
Not the side housing, the rotor housing. If you relieve the rotor housings to match a larger eyebrow, the apex seal corner piece will fall in to the relieved part of the rotor housing, since the corner piece is the final 1mm or so of the sliding surface of the apex seal. So if you run normal 2mm or 3mm apex seals, you can only have a relieved bridge port on one housing, and the apex seal must be oriented so that the corner piece slides up against the other housing. Or:
Partial Bridge = 1 piece, 2 piece, 3 piece apex
Full Bridge = 1 piece apex
PP = any construction apex
Bad Bridge with no eyebrow "relief" in rotor housing= any constuction apex
Full Bridge = 1 piece apex
PP = any construction apex
Bad Bridge with no eyebrow "relief" in rotor housing= any constuction apex
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