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Originally Posted by sil80forme
no flow testing.... i know i know, but it didnt hurt anything from what i can tell driving it on the street. i actually think it helped throttle response, and torque. for a NA ka she moves pretty good. if i ever get the money to get her dynoed i will post of some #'s. p.s i really noticed a difference at the local track where we have weekly drift sessions. its definitly easiar then before with stock mani.. but like i said the dyno will tell all.
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That not very technical...
I would have seriously bench tested it and port matched it with the head as well and then checked out the performance or improvement via, brake dyno or just dyno in general.
A lot of ebay parts dont really have this problem (assuming strucutal integrity) because they are exact clones of parts that have already been tested and flowed by other Japanese companies.
Good attempt on DIY fab ...
It is really important that those ports are smooth and allow the air to enter the chamber effortlessly.
I hope you did a lot of smoothing of the inside of the welds etc fromt he plenum to the bottle neck ports.