just a quick question, I have the 1.6L B6 SOHC engine in my 323 but I also have the B8 1.6L throttle body aswell as the 1.8L DOHC BP throttle body just sitting around, now I know they already bolt up just fine to the B6 intake manifold but when I do this there is a lip where it needs to be grinded down with a dremal or such, I am asking if I dont grind this lip down will I notice any improvement with the bigger throttle bodies??
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Fully kitted, Sparco seats, 17 inch AR rims, JDM parts to the MAX, Dropped 2 inchs, 10.1 inch MX3 GS big brake, Custom Copper paint, CF Hood, RESIDENT MAZDA PARTS GUY! I Work For Agincourt Mazda -
you have to match the intake manifold plenum to the throttle body you are gonna use or else its pointless -
there is no real point to upgrading the t/b. it has the same bolt pattern as a bp t/b but the plenum is necked down so small you cant open the t/b all the way. i looked at in depth when i did my bp swap in the 323. mazda really limited us on that one! the most you could so is dremal out the step down on the insde of the t/b. to allow better flow.
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changing your t/b for the bp require the bp vaf. If not your a/f could be bad...Comment
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it will not require a VAM change. the t/b has a tps that only tells the ecu at how much throttle is open. it gives no air volume reading. the VAM does that and if you swap to a bp one it will not run correctly due to the injector size difference.
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