Quote:
Originally Posted by Vettezuki
Ok, got it. Out of curiosity, BRUTAL sugested 190-210 and you're suggesting 185-195. What's the theory and why did you guys select slightly different ranges of intake runners. Basically I'm targeting 195 since it's inside both your ranges.
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The reason I picked 190 to 210 is the difference between manufactures flow rates. Some 210cc flow about what a AFR 190cc does in the mid lifts. AFR around 190cc would be about perfect. But, you said cost was a factor.
Everyone has different ideas on what to use. Lets figure our cost factor and THEN we can pick our intake runner based on manufacture flow rates.
Another thing to keep in mind is: An NA motor drags the air/fuel into the cylinder- a forced induction pushes the air/fuel in. Port velocity in small NA engines is VERY important. BUT, Forced Induction is pushed thru port and port size (to a limit) can be bigger than on a NA motor.