Talk To Me About Peripheral Porting
03-13-2003, 04:08 PM
#11
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Join Date: May 2002
Location: California
Posts: 22,465
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?
and what about bridging the 5th and 6th ports...affect driveability?
mike
03-13-2003, 04:24 PM
#12
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Thread Starter
Join Date: Sep 2002
Location: teh frozen nort
Posts: 1,030
Here is how Racing Beat does it:
J
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
03-13-2003, 08:08 PM
#15
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Join Date: Jan 2002
Location: NJ USA
Posts: 1,915
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.
03-13-2003, 08:33 PM
#16
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Join Date: Nov 2001
Posts: 574
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!!!!!!!
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!!!!!!!