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Originally Posted by Baldy' date='Mar 13 2003, 01:28 PM
what is undriveable about a bridge port? I always hear "rough idle" and such, but I haven't read specifics.
and what about bridging the 5th and 6th ports...affect driveability? mike |
Here is how Racing Beat does it:
The Racing Beat-modified 13B housing begins as a stock housing, but we bore and tap the housing, screw in and epoxy a threaded O-ringed tube, port the intake, and then race port the exhaust. The connection from the intake manifold to the housing is made with heavy duty hose and hose clamps (supplied with the Racing Beat peripheral intake manifolds). J |
Originally Posted by DJ Rotor' date='Mar 13 2003, 02:24 PM
Here is how Racing Beat does it:
J mike |
Check out some of Judge Ito's posts. He has a semi p-port/bridge he is putting together https://www.nopistons.com/forums/pub...DIR#>/ohmy.png
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Besides the Peripheral intake opening. A P-port engine offers more intake timing then a bridgeport. Basically the P-port engine is the biggest camshaft you could install on a rotary. Intake on a p-port could open sooner then a bridgeport and close later then a bridgeport. But because the engine has a huge overlap(Intake and exhaust ports opened at the same time) keeping a steady low Idle is kinda of hard. And because the the intake ports are so huge, it has an effect on air velocity(air velocity is slow) and reduces low rpm torque.. Some low rpm torque could be regained with a custom intake manifold.
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does it have to have the overlap (from exhaust and intake being open at same time) to make most power, or could you give the pport diff timing and still make gobs of power?
or the always nice semi-pport, just use a near stock sideport for your primary and pport as secondary, maybe the center housing so you only have 3 runners going to the intake manifold, one for each pport, and one for the center housing feeding both primarys. run 3 individual TB's, actually, just use the stock Throttle Body. ooooooh god im overloading with ideas!!!!!!! |
the nsu wankel spiders idle nicely at 800rpms, they have a small port though, and it uses a 2 barrel progessive carby, the first stage is really small, the second is big
mike |
yeah, theyre small ports with reasonable port timing. but still all pport.
ito, you should try to make a semi-pport N/A, that can be driven daily. see if you can get 300hp N/A streetable, lol. thats a challenge |
VWs have carbs like that, erm i mean throttlebodies
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Ito, check your PMs on RX-7 Club. https://www.nopistons.com/forums/pub...#>/biggrin.png
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