can i remove this...
06-02-03, 05:06 PM
#1
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can i remove this...
what is it and do i need it? i think it's the shutter valve??? it's in the intake manifold; this isn't the clearest shot. (carb is removed; looking down manifold) thanks,
-zac
-zac
06-02-03, 05:30 PM
#2
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I've got one of those too for the bottom set of butterflies on my throttle body...i'm assuming it's probably needed for your secondaries...but i know practically nothing about carbs.
06-02-03, 08:30 PM
#6
Airflow is my life
Yes its the famous shutter valve. You can remove the external actuator and wire tie the butterfly to stay open. Removing the butterfly is not reccomended. Itll cause an imbalance in the runner sizes. That runner is bigger then the front one if you look at it. Its bigger to compensate for the butterfly.
Whats it for? Its to prevent backfiring on deceleration. Nothing more.
Whats it for? Its to prevent backfiring on deceleration. Nothing more.
06-03-03, 06:24 AM
#7
I read your email
Originally posted by Rx7carl
Removing the butterfly is not reccomended. Itll cause an imbalance in the runner sizes. That runner is bigger then the front one if you look at it. Its bigger to compensate for the butterfly.
Removing the butterfly is not reccomended. Itll cause an imbalance in the runner sizes. That runner is bigger then the front one if you look at it. Its bigger to compensate for the butterfly.
I just noticed this "cut-through" between the front primary and secondary runners. What's that all about?
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06-03-03, 01:56 PM
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so your telling me somehow my intake manifold just got this cut out from somewhere???? hahahah THIS IS CRAZY!!!! ooooorrrr, someone put a bad intake in there before i got it maybe? it's supposed to be flat i guess huh? i am so lost. 
06-03-03, 02:03 PM
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Originally posted by FB II
so your telling me somehow my intake manifold just got this cut out from somewhere???? hahahah THIS IS CRAZY!!!! ooooorrrr, someone put a bad intake in there before i got it maybe? it's supposed to be flat i guess huh? i am so lost.
so your telling me somehow my intake manifold just got this cut out from somewhere???? hahahah THIS IS CRAZY!!!! ooooorrrr, someone put a bad intake in there before i got it maybe? it's supposed to be flat i guess huh? i am so lost.
mine has one on each side heh
06-03-03, 02:14 PM
#16
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The cut is there to balance the air/fuel mixture. For example if you got a RB intake and it didn’t have the cut through channel, you would want to get an adaptor that simulates the cut through.
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06-03-03, 03:17 PM
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yea i just talked to rotorsports racing about it too and he was like, "don't worry zach, every 12a i've worked on has it." i'm like, well god damn! hahahaha you guys scared the **** out of me! i'm very sensitive right now LOL!!!! i am picking up my new Nikki thursday, car should run well after that. i'm not 4kin with this rebuild stuff again. thanks guys!
-zac
-zac
06-03-03, 03:57 PM
#18
I read your email
Errr sorry for the confusion... I know it's suppose to be like that I'm just wondering why it was designed by Mazda that way.
Originally posted by inittab
iiinteresting.....
I just noticed this "cut-through" between the front primary and secondary runners. What's that all about?
iiinteresting.....
I just noticed this "cut-through" between the front primary and secondary runners. What's that all about?
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