I have been wading through various threads and have not been able to find one person who has done a dyno with a stock im and then a honda hybrid im. Can somebody post up if they have a before and after set? Perhaps type some profanity and demeaning words plus a link? Tanks!

 

havent both savington and levnubhin done this?

 

both of them and a few others. Not sure if the testing was with and without manifold ONLY though.
general consensous was "a bit of gain in the midrange and a TON of gain in the top end". IIRC

 

Yes they both have but I could not find a before and after dyno plot of either of their cars (after going through the build threads, dyno threads, and im threads). All I could find was sav's post manifold plot and lev's pre im plot and people saying it made a big improvement.

 

Well that's because no one has ever done a "true" back to back on the same day with the only change being the intake manifold.
People here are cheap and swapping out the intake manifold to run a true comparison is a lot of work. Plus, dyno time isn't cheap just to show people it works. No one is going to make any money on this.
You could be the first.

 

bump for info

 

My post-manifold plot literally is overlaid onto a pre-manifold plot.

 

Well sonofabitch. Then I have seen this. Thanks sav! This is savington's plot (of the people who may lack search skills).

 

Here's mine. Dotted line is honda manifold, solid line is stock 99 manifold with no vics activation.. I lost as much as 12ftlbs in the midrange.

 

What manifold did you chop? I am thinking you lost a good bit because you used an intake manifold with too large a plenum. How long did you make the runners?

 

That also was covered in an intake manifold thread already.