Originally Posted by
meh03
Hey Rob,
I'm looking at your site making a wish list. Looking at the cfm the DCAI, tweeked stock intake manifolds, ported t coated y pipe flow; it looks like the weak links in the intake system are the TB (any idea what the stock TB will flow?) and the NW y pipe.
If the ported y pipe will only flow 332 cfm, then why/how do you get a sizable performance increase with the tweeked manifolds since the stock manifolds already flow more than the y pipe will allow?
Right now I'm running the single CAI. If I did upgrade to the DCAI, the tweeked intakes, and ported y pipe how much HP and Torque do you estimate this would add? BTW, I have a 65mm pulley.
Also, If I made this upgrade with a EC re-tune, do you think the stock fuel system would be able to accomplish proper AF ratio's?
Thanks
the different parts are usually flowed at different vacuum ratings to keep them within the limits of the flow bench, we do it to show the before/after differences in flow for each part. trying to compare flow numbers done at different vacuum rates does not work. it is all about reduced restrictions. the throttle body is a pinch point but still benefits with less restriction before it as it allows a greater supply to be fed to it. also remember that the intake and TB are under vacuum while the IC/lower ypipe and intake manifolds are under boost.
as for guessing for dyno numbers, every car and dyno is different but I would expect another 35whp with the combo listed above.
yes the stock fuel system should be able to handle the added airflow assuming the tune is correct.